Historical Weather Data

Observations began July 2015

JUMP TO: DailyMonthlyYearlyNormalsRecordsNotes

Last 24 hours


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Daily History

Temperature

HourHigh TempLow TempAvgHigh Heat IndexAvg Heat Index
12:00 AM68.4°68.0°68.2°68.4°68.2°
01:00 AM68.5°68.4°68.4°68.5°68.4°
SUMMARYHigh TempLow TempAvgHigh Heat IndexAvg Heat Index
Max68.5°68.4°68.4°68.5°68.4°
Min68.4°68.0°68.2°68.4°68.2°
Avg68.5°68.2°68.2°68.5°68.2°

Humidity

HourHigh HumidityLow HumidityAvg HumidityHigh Dew PointLow Dew PointAvg Dew Point
12:00 AM77%76%76%60.6°60.3°60.4°
01:00 AM76%76%76%60.6°60.5°60.5°
SUMMARYHigh HumidityLow HumidityAvg HumidityHigh Dew PointLow Dew PointAvg Dew Point
Max77%76%76%60.6°60.5°60.5°
Min76%76%76%60.6°60.3°60.4°
Avg77%76%76%60.6°60.4°60.4°

Wind

HourHigh SustainedLow SustainedAvg SustainedHigh GustLow GustAvg GustAvg DirectionWind Run
12:00 AM8.0 mph5.0 mph6.0 mph17.0 mph10.0 mph14.2 mph214° SSW6.0 mi
01:00 AM6.0 mph6.0 mph6.0 mph15.0 mph13.0 mph14.5 mph224° SW0.4 mi
SUMMARYHigh SustainedLow SustainedAvg SustainedHigh GustLow GustAvg GustAvg DirectionWind Run
Max8.0 mph6.0 mph6.0 mph17.0 mph13.0 mph14.5 mph6.0 mi
Min6.0 mph5.0 mph6.0 mph15.0 mph10.0 mph14.2 mph0.4 mi
Avg7.0 mph5.5 mph6.0 mph16.0 mph11.5 mph14.2 mph215° SW3.2 mi
Total6.4 mi

Rain

SUMMARYLiquidSnow
Total0.00"0.0"

Pressure

HourHigh PressureLow PressureAvg Pressure
12:00 AM30.20"30.18"30.19"
01:00 AM30.19"30.19"30.19"
SUMMARYHigh PressureLow PressureAvg Pressure
Max30.20"30.19"30.19"
Min30.19"30.18"30.19"
Avg30.19"30.19"30.19"

Solar

HourHigh UVLow UVAvg UVHigh RadiationLow RadiationAvg RadiationTotal Radiation
12:00 AM0.00.00.00 W/m20 W/m20 W/m20.00 MJ/m2
01:00 AM0.00.00.00 W/m20 W/m20 W/m20.00 MJ/m2
SUMMARYHigh UVLow UVAvg UVHigh RadiationLow RadiationAvg RadiationTotal Radiation
Max0.00.00.00 W/m20 W/m20 W/m20.00 MJ/m2
Daytime Avg0.00 W/m20.00 MJ/m2
Total0.00 MJ/m2

Air

HourHigh AQILow AQIAvg AQIHigh EPA AQILow EPA AQIAvg EPA AQI
12:00 AM716365504245
01:00 AM686768464646
SUMMARYHigh AQILow AQIAvg AQIHigh EPA AQILow EPA AQIAvg EPA AQI
Max716768504646
Min686365464245
Avg706566484445
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Monthly History

Temperature

DayHigh TempLow TempAvg (NWS)AvgHDDCDDHigh Heat IndexAvg Heat Index
Sep 0181.0°56.5°68.5°68.2°0.03.280.7°68.2°
Sep 0289.0°69.4°79.0°76.9°0.011.993.0°77.9°
Sep 0390.0°68.8°79.5°76.3°0.011.397.2°77.5°
Sep 0495.7°68.8°82.5°80.4°0.015.4102.1°81.8°
Sep 0589.9°73.1°81.5°79.5°0.014.597.7°81.6°
Sep 0674.8°55.2°65.0°63.7°1.30.074.8°63.7°
Sep 0755.3°50.7°53.0°53.0°12.00.055.3°53.0°
Sep 0860.7°48.8°55.0°54.3°10.70.060.7°54.3°
Sep 0964.5°46.6°56.0°55.3°9.70.064.5°55.3°
Sep 1060.0°52.3°56.0°56.1°8.90.060.0°56.1°
Sep 1158.9°56.2°57.5°57.4°7.60.058.9°57.4°
Sep 1256.4°51.0°53.5°53.3°11.70.056.4°53.3°
Sep 1357.7°49.7°54.0°53.0°12.00.057.7°53.0°
Sep 1470.2°49.9°60.0°58.9°6.10.070.2°58.9°
Sep 1575.5°54.4°65.0°62.5°2.50.075.5°62.5°
Sep 1665.8°53.8°60.0°60.0°5.00.065.8°60.0°
Sep 1759.0°52.9°56.0°55.9°9.10.059.0°55.9°
Sep 1860.9°47.3°54.0°55.5°9.50.060.9°55.5°
Sep 1971.1°45.3°58.0°56.8°8.20.071.1°56.8°
Sep 2074.8°54.6°65.0°64.6°0.40.074.8°64.6°
Sep 2175.7°62.5°69.0°69.9°0.04.975.7°69.9°
Sep 2268.5°68.0°68.5°68.2°0.03.268.5°68.2°
SUMMARYHigh TempLow TempAvg (NWS)AvgHDDCDDHigh Heat IndexAvg Heat Index
Max95.7°73.1°82.5°80.4°12.015.4102.1°81.8°
Min55.3°45.3°53.0°53.0°0.00.055.3°53.0°
Avg70.7°56.2°63.2°62.5°5.22.971.8°62.7°
Total114.864.5
ThresholdsHigh TempLow Temp 
>= 902 days 
>= 805 days0 days 
<= 320 days0 days 
<= 00 days0 days 

Humidity

DayHigh HumidityLow HumidityAvg HumidityHigh Dew PointLow Dew PointAvg Dew Point
Sep 0177%38%58%57.3°47.6°52.3°
Sep 0278%47%59%70.2°53.0°61.5°
Sep 0386%53%71%72.4°61.9°65.8°
Sep 0492%31%65%72.0°59.5°66.3°
Sep 0577%54%67%73.2°64.4°67.7°
Sep 06100%74%94%67.5°55.1°62.0°
Sep 07100%82%92%55.3°45.4°50.5°
Sep 0890%60%76%49.6°44.9°46.8°
Sep 0996%62%80%52.8°45.4°48.9°
Sep 1098%76%89%56.1°50.6°52.9°
Sep 11100%76%89%58.3°49.1°54.0°
Sep 1290%67%76%49.3°43.4°45.9°
Sep 1396%67%84%50.7°45.3°48.2°
Sep 1492%43%66%49.9°43.4°47.0°
Sep 1578%49%69%59.2°47.5°51.9°
Sep 1694%64%80%55.7°49.3°53.6°
Sep 1794%69%80%55.1°46.2°49.7°
Sep 1892%59%74%49.7°44.6°47.0°
Sep 1990%56%71%55.2°37.2°47.3°
Sep 2094%62%81%61.6°49.9°58.2°
Sep 2190%60%72%63.2°58.7°60.4°
Sep 2280%79%79%61.7°61.3°61.5°
SUMMARYHigh HumidityLow HumidityAvg HumidityHigh Dew PointLow Dew PointAvg Dew Point
Max100%82%94%73.2°64.4°67.7°
Min77%31%58%49.3°37.2°45.9°
Avg90%60%76%58.9°50.2°54.2°

Wind

DayHigh SustainedLow SustainedAvg SustainedHigh GustLow GustAvg GustAvg DirectionWind Run
Sep 0113.0 mph3.0 mph8.2 mph33.0 mph10.0 mph20.9 mph201° SSW197.8 mi
Sep 0212.0 mph0.0 mph5.2 mph33.0 mph0.0 mph13.4 mph209° SSW123.2 mi
Sep 039.0 mph0.0 mph3.4 mph23.0 mph0.0 mph8.9 mph193° SSW81.6 mi
Sep 048.0 mph0.0 mph2.4 mph21.0 mph0.0 mph7.0 mph164° SSE56.9 mi
Sep 058.0 mph2.0 mph5.6 mph24.0 mph6.0 mph14.6 mph189° S135.4 mi
Sep 0610.0 mph0.0 mph5.2 mph23.0 mph0.0 mph12.9 mph323° NW125.0 mi
Sep 079.0 mph2.0 mph5.6 mph20.0 mph7.0 mph14.0 mph350° N133.4 mi
Sep 086.0 mph0.0 mph3.1 mph14.0 mph0.0 mph8.2 mph336° NNW75.3 mi
Sep 094.0 mph0.0 mph1.6 mph10.0 mph0.0 mph4.4 mph329° NNW37.5 mi
Sep 103.0 mph0.0 mph1.4 mph8.0 mph0.0 mph3.7 mph303° WNW33.2 mi
Sep 118.0 mph1.0 mph3.5 mph17.0 mph2.0 mph10.0 mph351° N84.6 mi
Sep 129.0 mph3.0 mph5.5 mph19.0 mph8.0 mph13.9 mph342° NNW130.9 mi
Sep 137.0 mph0.0 mph3.0 mph13.0 mph0.0 mph7.6 mph321° NW70.8 mi
Sep 1411.0 mph0.0 mph3.6 mph24.0 mph0.0 mph9.2 mph205° SSW86.2 mi
Sep 1512.0 mph1.0 mph6.9 mph27.0 mph5.0 mph17.1 mph212° SSW165.8 mi
Sep 169.0 mph0.0 mph3.4 mph19.0 mph0.0 mph9.0 mph309° NW80.9 mi
Sep 178.0 mph2.0 mph4.3 mph20.0 mph4.0 mph10.8 mph334° NNW104.1 mi
Sep 185.0 mph0.0 mph2.4 mph13.0 mph0.0 mph6.8 mph9° N57.1 mi
Sep 197.0 mph0.0 mph3.0 mph18.0 mph0.0 mph8.3 mph179° S70.8 mi
Sep 206.0 mph0.0 mph2.3 mph15.0 mph0.0 mph6.7 mph161° SSE54.3 mi
Sep 218.0 mph0.0 mph3.3 mph17.0 mph0.0 mph9.0 mph229° SW79.4 mi
Sep 228.0 mph5.0 mph6.0 mph17.0 mph10.0 mph14.2 mph215° SW6.4 mi
SUMMARYHigh SustainedLow SustainedAvg SustainedHigh GustLow GustAvg GustAvg DirectionWind Run
Max13.0 mph5.0 mph8.2 mph33.0 mph10.0 mph20.9 mph197.8 mi
Min3.0 mph0.0 mph1.4 mph8.0 mph0.0 mph3.7 mph6.4 mi
Avg8.2 mph0.9 mph3.9 mph19.5 mph2.4 mph10.3 mph275° W90.5 mi
Total1990.6 mi

Rain

DayLiquidSnow
Sep 010.00"0.0"
Sep 020.00"0.0"
Sep 030.02"0.0"
Sep 040.00"0.0"
Sep 050.00"0.0"
Sep 060.47"0.0"
Sep 070.08"0.0"
Sep 080.00"0.0"
Sep 090.00"0.0"
Sep 100.27"0.0"
Sep 110.02"0.0"
Sep 120.00"0.0"
Sep 130.03"0.0"
Sep 140.00"0.0"
Sep 150.00"0.0"
Sep 160.00"0.0"
Sep 170.00"0.0"
Sep 180.00"0.0"
Sep 190.00"0.0"
Sep 200.00"0.0"
Sep 210.00"0.0"
Sep 220.00"0.0"
SUMMARYLiquidSnow
Max0.47"0.0"
Min0.00"0.0"
Avg0.04"0.0"
Total0.89"0.0"
ThresholdsLiquidSnow
>= 0.01"6 days
>= 0.10"2 days0 days
>= 1"0 days0 days
>= 4"0 days0 days
>= 8"0 days

Pressure

DayHigh PressureLow PressureAvg Pressure
Sep 0130.13"29.88"30.03"
Sep 0229.90"29.79"29.86"
Sep 0329.79"29.71"29.74"
Sep 0429.79"29.73"29.77"
Sep 0529.81"29.69"29.76"
Sep 0629.90"29.63"29.79"
Sep 0730.09"29.89"30.00"
Sep 0830.19"30.08"30.14"
Sep 0930.23"30.17"30.20"
Sep 1030.23"30.17"30.20"
Sep 1130.20"30.14"30.17"
Sep 1230.15"30.11"30.13"
Sep 1330.19"30.12"30.15"
Sep 1430.18"30.06"30.13"
Sep 1530.07"29.95"30.00"
Sep 1630.04"29.95"30.00"
Sep 1730.08"30.01"30.06"
Sep 1830.10"30.03"30.06"
Sep 1930.05"29.97"30.01"
Sep 2030.09"29.99"30.03"
Sep 2130.21"30.09"30.16"
Sep 2230.20"30.18"30.19"
SUMMARYHigh PressureLow PressureAvg Pressure
Max30.23"30.18"30.20"
Min29.79"29.63"29.74"
Avg30.07"29.97"30.02"

Solar

DayHigh UVDaytime Avg UVHigh RadiationDaytime Avg RadiationTotal Radiation
Sep 016.42.7840 W/m2378 W/m218.23 MJ/m2
Sep 026.22.6735 W/m2363 W/m217.42 MJ/m2
Sep 037.52.8940 W/m2353 W/m216.85 MJ/m2
Sep 046.52.9717 W/m2382 W/m218.18 MJ/m2
Sep 056.92.4830 W/m2290 W/m213.75 MJ/m2
Sep 065.10.7534 W/m298 W/m24.61 MJ/m2
Sep 071.30.4134 W/m256 W/m22.63 MJ/m2
Sep 087.02.4976 W/m2355 W/m216.62 MJ/m2
Sep 095.62.4726 W/m2362 W/m216.88 MJ/m2
Sep 102.70.6327 W/m289 W/m24.14 MJ/m2
Sep 112.10.5230 W/m270 W/m23.23 MJ/m2
Sep 124.70.9526 W/m2123 W/m25.66 MJ/m2
Sep 135.41.2793 W/m2171 W/m27.84 MJ/m2
Sep 145.62.4849 W/m2396 W/m218.10 MJ/m2
Sep 155.81.5798 W/m2213 W/m29.70 MJ/m2
Sep 164.81.7800 W/m2265 W/m211.98 MJ/m2
Sep 174.51.2777 W/m2180 W/m28.09 MJ/m2
Sep 185.12.1969 W/m2363 W/m216.27 MJ/m2
Sep 195.21.9875 W/m2324 W/m214.45 MJ/m2
Sep 205.21.6872 W/m2248 W/m211.03 MJ/m2
Sep 214.92.0842 W/m2306 W/m213.53 MJ/m2
Sep 220.00.00 W/m20 W/m20.00 MJ/m2
SUMMARYHigh UVDaytime Avg UVHigh RadiationDaytime Avg RadiationTotal Radiation
Max7.52.9976 W/m2396 W/m218.23 MJ/m2
Min0.00.00 W/m20 W/m20.00 MJ/m2
Avg4.91.8686 W/m2257 W/m211.33 MJ/m2
Total249.19 MJ/m2

Air

DayHigh AQILow AQIAvg AQIHigh EPA AQILow EPA AQIAvg EPA AQI
Sep 015051229815
Sep 02711140551331
Sep 03914065662545
Sep 04944067703849
Sep 05974565682947
Sep 06540113306
Sep 075902038011
Sep 081084866802546
Sep 09966580685057
Sep 10854661592540
Sep 1181114555029
Sep 1215041306
Sep 1335392549
Sep 14151414129816
Sep 15811640571327
Sep 1618144631692542
Sep 176502042014
Sep 189931272812
Sep 195281733815
Sep 2019917631831344
Sep 211024766723346
Sep 22716366504245
SUMMARYHigh AQILow AQIAvg AQIHigh EPA AQILow EPA AQIAvg EPA AQI
Max19965801835057
Min15041306
Avg882340671729
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Yearly History

Temperature

MonthHigh TempLow TempAvg (NWS)AvgHDDCDDHigh Heat IndexAvg Heat IndexLow Wind ChillAvg Wind Chill
Jan38.1°-3.1°24.9°25.1°1235.40.038.1°25.1°-18.3°21.2°
Feb49.3°-2.3°23.6°23.7°1155.10.049.3°23.7°-20.5°18.3°
Mar46.8°12.7°28.5°28.7°1125.30.046.8°28.7°1.5°25.2°
Apr84.3°19.6°40.5°40.3°745.75.981.7°40.3°12.8°37.2°
May92.3°32.5°53.3°52.9°398.324.591.4°52.9°22.2°52.1°
Jun90.7°40.4°61.1°60.6°176.342.990.6°60.6°39.1°60.5°
Jul88.7°51.2°65.5°65.3°35.944.293.5°65.3°51.2°65.3°
Aug86.5°47.3°65.5°65.0°59.359.088.2°65.0°47.3°65.0°
Sep95.7°45.3°63.2°62.5°114.864.5102.1°62.7°45.3°62.5°
SUMMARYHigh TempLow TempAvg (NWS)AvgHDDCDDHigh Heat IndexAvg Heat IndexLow Wind ChillAvg Wind Chill
Max95.7°51.2°65.5°65.3°1235.464.5102.1°65.3°51.2°65.3°
Min38.1°-3.1°23.6°23.7°35.90.038.1°23.7°-20.5°18.3°
Avg74.7°27.1°46.8°46.8°560.726.875.7°46.8°20.1°44.9°
Total5046.1241.0
ThresholdsHigh TempLow Temp 
>= 904 days 
>= 8026 days0 days 
<= 3245 days102 days 
<= 00 days3 days 

Humidity

MonthHigh HumidityLow HumidityAvg HumidityHigh Dew PointLow Dew PointAvg Dew Point
Jan97%33%80%33.6°-18.0°19.7°
Feb92%28%68%39.1°-11.4°14.4°
Mar94%20%71%36.7°-0.3°19.9°
Apr97%23%68%51.4°7.4°29.6°
May99%11%60%60.4°1.8°37.3°
Jun92%17%68%63.5°24.4°49.0°
Jul100%34%71%73.6°37.4°55.2°
Aug100%38%72%67.0°40.2°55.1°
Sep100%31%76%73.2°37.2°54.2°
SUMMARYHigh HumidityLow HumidityAvg HumidityHigh Dew PointLow Dew PointAvg Dew Point
Max100%38%80%73.6°40.2°55.2°
Min92%11%60%33.6°-18.0°14.4°
Avg97%26%70%55.4°13.2°36.7°

Wind

MonthHigh SustainedAvg SustainedHigh GustAvg GustAvg DirectionWind Run
Jan13.0 mph4.3 mph32.0 mph10.7 mph278° W3177.6 mi
Feb18.0 mph5.5 mph37.0 mph13.1 mph266° W3677.9 mi
Mar16.0 mph4.3 mph33.0 mph10.6 mph342° NNW3200.2 mi
Apr18.0 mph5.6 mph36.0 mph13.0 mph297° WNW3998.1 mi
May18.0 mph4.0 mph40.0 mph9.8 mph4° N3010.2 mi
Jun12.0 mph3.0 mph30.0 mph7.6 mph349° NNW2142.1 mi
Jul15.0 mph2.7 mph37.0 mph7.3 mph284° WNW2028.7 mi
Aug15.0 mph3.4 mph37.0 mph8.7 mph302° WNW2497.6 mi
Sep13.0 mph3.9 mph33.0 mph10.3 mph275° W1990.1 mi
SUMMARYHigh SustainedAvg SustainedHigh GustAvg GustAvg DirectionWind Run
Max18.0 mph5.6 mph40.0 mph13.1 mph3998.1 mi
Min12.0 mph2.7 mph30.0 mph7.3 mph1990.1 mi
Avg15.3 mph4.1 mph35.0 mph10.1 mph298° WNW2887.8 mi
Total25722.4 mi

Rain

MonthLiquidSnow
Jan3.52"27.0"
Feb2.04"25.8"
Mar1.99"18.5"
Apr4.79"7.1"
May1.78"0.0"
Jun2.32"0.0"
Jul4.89"0.0"
Aug2.94"0.0"
Sep0.89"0.0"
SUMMARYLiquidSnow
Max4.89"27.0"
Min0.89"0.0"
Avg2.80"8.7"
Total25.16"78.4"
ThresholdsLiquidSnow
>= 0.01"106 days
>= 0.10"61 days42 days
>= 1"4 days23 days
>= 4"0 days5 days
>= 8"2 days

Pressure

MonthHigh PressureLow PressureAvg Pressure
Jan30.39"29.36"29.96"
Feb30.63"29.14"29.92"
Mar30.65"29.31"30.04"
Apr30.61"29.32"29.91"
May30.57"29.30"30.08"
Jun30.20"29.51"29.95"
Jul30.17"29.64"29.91"
Aug30.35"29.40"29.96"
Sep30.23"29.63"30.02"
SUMMARYHigh PressureLow PressureAvg Pressure
Max30.65"29.64"30.08"
Min30.17"29.14"29.91"
Avg30.42"29.40"29.97"

Solar

MonthHigh UVDaytime Avg UVHigh RadiationDaytime Avg RadiationTotal Radiation
Jan1.80.2617 W/m293 W/m294.79 MJ/m2
Feb3.40.7865 W/m2184 W/m2192.27 MJ/m2
Mar4.71.21074 W/m2247 W/m2330.92 MJ/m2
Apr7.11.61146 W/m2270 W/m2398.25 MJ/m2
May8.62.31113 W/m2368 W/m2619.43 MJ/m2
Jun9.32.31158 W/m2340 W/m2581.60 MJ/m2
Jul10.92.51222 W/m2350 W/m2604.42 MJ/m2
Aug8.32.31065 W/m2318 W/m2504.18 MJ/m2
Sep7.51.8976 W/m2257 W/m2249.19 MJ/m2
SUMMARYHigh UVDaytime Avg UVHigh RadiationDaytime Avg RadiationTotal Radiation
Max10.92.51222 W/m2368 W/m2619.43 MJ/m2
Min1.80.2617 W/m293 W/m294.79 MJ/m2
Avg6.81.71026 W/m2270 W/m2397.23 MJ/m2
Total3575.05 MJ/m2

Air

MonthHigh AQILow AQIAvg AQIHigh EPA AQILow EPA AQIAvg EPA AQI
JanN/AN/AN/AN/AN/AN/A
FebN/AN/AN/AN/AN/AN/A
MarN/AN/AN/AN/AN/AN/A
AprN/AN/AN/AN/AN/AN/A
MayN/AN/AN/AN/AN/AN/A
Jun258201192142197
Jul404046407434
Aug192051178038
Sep199040183029
SUMMARYHigh AQILow AQIAvg AQIHigh EPA AQILow EPA AQIAvg EPA AQI
Max404201194072197
Min192040178029
Avg263554246640
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Marquette, MI Normals

Month TempHi TempLo TempAv Depart Rain Snow
January 24.6° F 12.4° F 18.5° F -0.5° F 1.86" 25.1"
February 26.9° F 12.5° F 19.7° F -0.1° F 1.47" 20.9"
March 35.3° F 21.0° F 28.2° F 0.0° F 1.59" 14.2"
April 45.8° F 31.0° F 38.4° F 1.0° F 2.74" 8.4"
May 58.7° F 40.8° F 49.8° F 2.9° F 2.90" 0.3"
June 67.9° F 50.1° F 59.0° F 2.8° F 3.05" 0.0"
July 74.6° F 57.7° F 66.2° F 1.6° F 3.11" 0.0"
August 74.3° F 58.1° F 66.2° F 0.5° F 2.31" 0.0"
September 67.3° F 51.6° F 59.4° F 0.4° F 3.34" 0.0"
October 53.9° F 40.0° F 47.0° F -0.2° F 3.43" 0.9"
November 40.6° F 28.5° F 34.5° F -0.4° F 2.42" 11.1"
December 30.2° F 18.6° F 24.4° F -0.5° F 1.98" 21.1"
SUMMARY TempHi TempLo TempAv Depart Rain Snow
Avg 50.0° F 35.2° F 42.6° F 0.62
Total 30.2" 102.0"
Based on official Marquette NOAA COOP station averages 1991-2020
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Station Records


marquetteweather.com

Highest recorded temperature: 95.7 °F on Sep 4, 2023
Lowest recorded temperature: -14.7 °F on Jan 31, 2019
Total recorded temperature range: 110.4 °F

Highest recorded pressure: 30.83 inHg on Jan 13, 2017
Lowest recorded pressure: 28.78 inHg on Dec 24, 2015
Total recorded pressure range: 2.05 inHg

Highest recorded wind speed: 51.0 MPH on Feb 24, 2019

Wettest day on record: Sep 5, 2018 with 3.11 in of rain.

Sunniest day on record: May 27, 2023 with 12.1 hours of sunshine.

Official Weather Data

Forecast Accuracy

Check the accuracy of forecasted temperatures

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Notes:

General

  • The above data, with the exception of normals, are produced by a private weather station located 1/4 mile south of downtown Marquette. The station went online July 10, 2015.
  • If you're seeking official weather data for the Marquette COOP station (1857 - present), please visit NOAA NOWData.
  • 24 hour graphs at the top of the page are updated every 5 minutes.
  • Daily and monthly history tables are updated along with the graphs every 5 minutes. Yearly histories are updated at the top of every hour.

Temperatures

  • "NWS" averages are the sum of the daily high temperature & daily low temperature in whole degrees divided by 2. This is the National Weather Service method used for climatological summaries. All other fields labelled "Avg" contain integrated averages using one minute samples. "Avg" labelled summary columns contain weighted means (i.e. a partial hour/day/month counts less than a full one).
  • CDD = Cooling Degree Days & HDD = Heating Degree Days. Degree days are calculated using daily NWS averages compared to a base value of 65°. For example, a day with an avg temperature of 67.7° will have 2.7 CDDs & 0 HDDs. A 33.2° avg temperature will produce 31.8 HDDs & 0 CDDs.
  • In the daily & monthly history tables, "Wind Chill" appears only October through April. It is calculated when the temperature is 45 or below and sustained wind speed is at least 3 mph. Otherwise, it equals the temperature. Likewise, "Heat Index" appears only May through September. It is calculated only when the temperature is 80 or above. Otherwise, it equals the temperature.

Wind

  • "Sustained" wind is the rolling 10 minute average sustained wind speed.
  • "Wind Dir" is a scalar average of direction irrespective of speed. However, calm winds do not have a valid direction and are not included in the average.
  • "Wind Run" uses the 10 minute wind average.
  • "Low Sustained" & "Low Max" wind values are omitted from the yearly history table since every field equals 0.
  • Anemometer (wind gauge) was raised from 20 ft to 28 ft on June 18, 2017

Humidity / Dew Point

  • As of July 2018 daily, monthly, and yearly history tables contain corrected humidities and dew points. A custom correction curve addresses a dry bias above 95% and a wet bias below 92% inherent to the sensor. A third-party device accurate to within 2% humidity established the deltas used in the algorithm. The daily table contains up-to-date corrections for today. The monthly and yearly tables have corrections through yesterday (updated just after midnight each morning).
  • The 24 hour graphs contain corrected humidities & dew points.

Precipitation

  • "Liquid" precipitation in the winter is the amount of melted snow and/or ice.
  • Daily snowfall record keeping began in October 2017.
  • Starting in the fall of 2019 snowfall measurements for the current season also appear on the Snow Measurements page. This is where you will find break outs of all intraday measurements & estimates when measurement was insufficient or impossible.
  • Snowfall measurements occur as time, health, and weather permits.
  • The daily precipitation table doesn't contain hourly reports because often we correct the total with a measurement from our manual gauge. Unfortunately, when that happens, we have no way of reconstructing hourly amounts. For a raw, uncorrected breakdown of rain over the past 24 hours please see the precipitation graph at the top of the page.

Pressure

  • Since January 15, 2018, pressure is recorded in altimeter format. The home page, however, continues to display "Barometer" in MSLP format by default.

Solar

  • UV index measurement began June 6, 2020. Sensor detects ultraviolet radiation at wavelengths of 290 to 390 nm. Scale is 0-16 (but never gets above 11 in Marquette).
  • Solar radiation measurement began June 11, 2020. Scale for solar radiation is 0 - 1800 Watts per meter squared. This measurement of the sun's energy (detected between 300 and 1100 nanometers wavelength) can approximate daylight cloud cover relative to clear days for a given time of year. It's also useful for determining solar electricity generation and aerosol levels (pollution, smoke, dust, ash, etc).
  • The daily table summary footer for this tab omits "Min" since every value is always 0. Instead you'll see a "Daytime Avg" row displaying weighted averages of all hourly maximums, minimums, and averages between sunrise & sunset.
  • In monthly & yearly tables, you'll see a "Daytime Avg" column containing daylight averages. The "Min" column will be entirely missing since every value would be 0.
  • Total Radiation is measured in Megajoules (1,000,000 J) per meter squared.

Normals

  • "Depart" in the Normals table refers to the average departure (or difference) between our weather station and the official Marquette average temperature recorded at the Water Filtration Plant on Lakeshore Dr. These numbers are updated monthly based on data beginning August 2015 (first full month of data collection).

Air Quality

  • Air quality data collection began June 21, 2023. The table contains the Air Quality Index (AQI) and the EPA-adjusted AQI (which is the reading published on the City/home page). AQI is based on a 2.5 micron particle count. The scale is 0-500. The higher the AQI, the worse the air quality. We use a Purple Air dual-laser particle counter which records the 2-minute average AQI every minute. For an explanation of the ratings (not published here) that accompany AQI please tap on the linked headline "Air Quality" on the City page (in the Weather Conditions section at the top/left).
  • Sometimes my neighbor to the south burns trash (notable on days with a south wind). Also two doors down to the east is an Airbnb home with a fire pit. Burning events will be evidenced by a 1 hour spike in AQI. On such days, it is important to evaluate the daily average rather than maximum AQI.
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