Historical Weather Data

Observations began July 2015

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Temperature graph Wind chill graph Humidity graph Dew point graph Wind direction graph Wind speed graph Barometric Pressure graph Rainfall graph> Rain Rate graph> Solar Radiation graph
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Daily History


HourHigh TempLow TempAvgLow Wind ChillAvg Wind Chill
12:00 AM46.2°45.2°45.7°45.2°45.7°
01:00 AM45.4°44.7°45.0°42.9°44.9°
02:00 AM45.2°44.3°44.8°44.3°44.8°
03:00 AM44.9°44.3°44.7°42.9°44.5°
04:00 AM44.8°44.4°44.6°42.8°44.5°
05:00 AM44.9°44.6°44.8°44.6°44.8°
06:00 AM44.8°42.9°43.8°41.4°43.5°
07:00 AM43.4°42.4°43.0°42.4°43.0°
SUMMARYHigh TempLow TempAvgLow Wind ChillAvg Wind Chill


HourHigh HumidityLow HumidityAvg HumidityHigh Dew PointLow Dew PointAvg Dew Point
12:00 AM69%65%67%36.5°34.5°35.4°
01:00 AM69%67%68%35.6°34.5°35.1°
02:00 AM67%64%65%34.9°32.9°33.7°
03:00 AM69%64%67%35.2°32.9°34.6°
04:00 AM69%65%67%35.2°33.5°34.4°
05:00 AM67%64%66%34.5°33.2°33.9°
06:00 AM77%65%72%36.5°33.7°35.2°
07:00 AM82%73%77%37.4°35.1°36.3°
SUMMARYHigh HumidityLow HumidityAvg HumidityHigh Dew PointLow Dew PointAvg Dew Point


HourHigh SustainedLow SustainedAvg SustainedHigh GustLow GustAvg GustAvg DirectionWind Run
12:00 AM7.0 mph3.0 mph4.6 mph18.0 mph11.0 mph15.7 mph60° ENE4.6 mi
01:00 AM4.0 mph3.0 mph3.2 mph12.0 mph10.0 mph11.2 mph52° NE3.2 mi
02:00 AM4.0 mph2.0 mph2.6 mph12.0 mph7.0 mph10.0 mph30° NNE2.6 mi
03:00 AM4.0 mph2.0 mph2.8 mph12.0 mph6.0 mph10.5 mph40° NE2.8 mi
04:00 AM4.0 mph2.0 mph2.6 mph14.0 mph9.0 mph11.3 mph40° NE2.6 mi
05:00 AM3.0 mph2.0 mph2.4 mph14.0 mph7.0 mph10.0 mph34° NNE2.4 mi
06:00 AM4.0 mph1.0 mph2.6 mph13.0 mph1.0 mph9.5 mph24° NNE2.6 mi
07:00 AM3.0 mph2.0 mph2.6 mph10.0 mph8.0 mph9.2 mph13° NNE2.5 mi
SUMMARYHigh SustainedLow SustainedAvg SustainedHigh GustLow GustAvg GustAvg DirectionWind Run
Max7.0 mph3.0 mph4.6 mph18.0 mph11.0 mph15.7 mph4.6 mi
Min3.0 mph1.0 mph2.4 mph10.0 mph1.0 mph9.2 mph2.4 mi
Avg4.1 mph2.1 mph2.9 mph13.1 mph7.4 mph10.9 mph37° NE2.9 mi
Total23.4 mi




HourHigh PressureLow PressureAvg Pressure
12:00 AM30.17"30.16"30.17"
01:00 AM30.17"30.16"30.17"
02:00 AM30.18"30.17"30.18"
03:00 AM30.18"30.17"30.17"
04:00 AM30.18"30.17"30.18"
05:00 AM30.20"30.18"30.19"
06:00 AM30.20"30.19"30.20"
07:00 AM30.20"30.19"30.20"
SUMMARYHigh PressureLow PressureAvg Pressure


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
02:00 AM0.00.00.00 W/m20 W/m20 W/m20.00 MJ/m2
03:00 AM0.00.00.00 W/m20 W/m20 W/m20.00 MJ/m2
04:00 AM0.00.00.00 W/m20 W/m20 W/m20.00 MJ/m2
05:00 AM0.00.00.00 W/m20 W/m20 W/m20.00 MJ/m2
06:00 AM0.00.00.00 W/m20 W/m20 W/m20.00 MJ/m2
07:00 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
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Monthly History


DayHigh TempLow TempAvg (NWS)AvgHDDCDDLow Wind ChillAvg Wind Chill
Oct 0184.2°61.7°73.0°71.2°°71.2°
Oct 0276.6°60.9°69.0°66.9°0.01.960.9°66.9°
Oct 0363.6°60.6°62.5°62.3°°62.3°
Oct 0461.6°54.8°58.5°60.2°°60.2°
Oct 0564.8°47.7°56.5°56.4°°56.4°
Oct 0669.9°50.6°60.5°59.2°°59.2°
Oct 0765.5°50.2°57.5°58.4°°58.4°
Oct 0868.2°60.4°64.0°63.1°°63.1°
Oct 0972.9°59.4°66.0°64.9°°64.9°
Oct 1072.8°61.8°67.5°66.4°0.01.461.8°66.4°
Oct 1174.2°60.3°67.0°65.1°°65.1°
Oct 1260.4°57.5°59.0°58.9°°58.9°
Oct 1363.5°57.7°61.0°60.2°°60.2°
Oct 1469.0°51.6°60.5°61.2°°61.2°
Oct 1560.2°43.2°51.5°51.1°°51.1°
Oct 1654.2°44.5°49.0°49.2°°49.1°
Oct 1760.7°44.0°52.5°51.8°°51.8°
Oct 1862.9°41.3°52.0°52.5°°52.5°
Oct 1977.0°57.2°67.0°65.3°0.00.357.2°65.3°
Oct 2062.6°46.8°55.0°51.5°°51.5°
Oct 2147.2°37.9°42.5°42.9°°39.5°
Oct 2247.4°35.9°41.5°41.1°°39.4°
Oct 2349.9°36.1°43.0°42.4°°41.9°
Oct 2447.1°37.1°42.0°41.8°°40.6°
Oct 2546.9°39.9°43.5°44.8°°44.4°
Oct 2646.2°42.4°44.0°44.6°°44.5°
SUMMARYHigh TempLow TempAvg (NWS)AvgHDDCDDLow Wind ChillAvg Wind Chill
ThresholdsHigh TempLow Temp 
>= 900 days 
>= 801 day0 days 
<= 320 days0 days 
<= 00 days0 days 


DayHigh HumidityLow HumidityAvg HumidityHigh Dew PointLow Dew PointAvg Dew Point
Oct 0176%43%62%61.8°52.7°57.0°
Oct 0297%64%82%64.8°57.6°61.1°
Oct 03100%91%96%63.3°58.9°61.1°
Oct 0499%86%94%61.3°51.9°58.4°
Oct 0597%63%86%57.3°46.1°52.2°
Oct 0697%68%84%60.9°49.0°54.3°
Oct 0794%76%87%59.7°48.0°54.5°
Oct 0899%85%92%65.0°57.0°60.8°
Oct 0999%62%82%61.5°56.2°59.2°
Oct 1091%73%83%64.5°57.9°61.2°
Oct 1189%48%75%60.8°51.7°56.4°
Oct 1294%86%91%57.3°55.2°56.3°
Oct 1394%76%87%58.4°55.5°56.4°
Oct 1491%40%71%58.6°40.4°50.9°
Oct 1586%40%65%42.9°34.7°39.1°
Oct 1676%54%64%40.2°35.2°37.3°
Oct 1770%31%55%41.4°28.7°35.4°
Oct 1880%36%62%47.2°34.5°39.4°
Oct 1953%27%42%45.5°37.2°41.3°
Oct 2090%49%80%51.5°41.8°45.2°
Oct 2190%62%78%44.4°30.6°36.5°
Oct 2288%61%75%36.4°31.0°33.7°
Oct 2391%54%73%37.3°30.0°34.0°
Oct 2489%55%74%38.9°29.9°34.1°
Oct 2589%55%70%38.8°30.2°35.5°
Oct 2683%70%74%38.3°35.1°36.6°
SUMMARYHigh HumidityLow HumidityAvg HumidityHigh Dew PointLow Dew PointAvg Dew Point


DayHigh SustainedLow SustainedAvg SustainedHigh GustLow GustAvg GustAvg DirectionWind Run
Oct 018.0 mph0.0 mph3.9 mph21.0 mph0.0 mph10.4 mph223° SW93.3 mi
Oct 024.0 mph0.0 mph1.2 mph10.0 mph0.0 mph3.6 mph21° NNE29.6 mi
Oct 035.0 mph0.0 mph1.5 mph9.0 mph0.0 mph4.7 mph36° NE36.3 mi
Oct 045.0 mph0.0 mph2.3 mph11.0 mph0.0 mph6.4 mph358° N54.0 mi
Oct 054.0 mph0.0 mph1.2 mph9.0 mph0.0 mph3.2 mph35° NE28.7 mi
Oct 066.0 mph0.0 mph1.5 mph13.0 mph0.0 mph4.1 mph157° SSE35.2 mi
Oct 075.0 mph0.0 mph1.1 mph11.0 mph0.0 mph3.3 mph150° SSE25.4 mi
Oct 082.0 mph0.0 mph0.3 mph7.0 mph0.0 mph1.2 mph116° ESE6.5 mi
Oct 097.0 mph0.0 mph2.3 mph16.0 mph0.0 mph6.4 mph203° SSW55.9 mi
Oct 1011.0 mph0.0 mph5.0 mph27.0 mph0.0 mph14.6 mph172° S120.4 mi
Oct 1110.0 mph0.0 mph3.4 mph27.0 mph0.0 mph9.5 mph227° SW81.7 mi
Oct 129.0 mph1.0 mph5.0 mph19.0 mph3.0 mph12.1 mph335° NNW120.3 mi
Oct 1310.0 mph0.0 mph3.2 mph23.0 mph0.0 mph8.9 mph253° WSW75.6 mi
Oct 149.0 mph0.0 mph4.0 mph20.0 mph0.0 mph11.4 mph202° SSW95.5 mi
Oct 157.0 mph0.0 mph2.9 mph13.0 mph0.0 mph7.6 mph268° W68.8 mi
Oct 1613.0 mph0.0 mph5.8 mph25.0 mph0.0 mph14.0 mph291° WNW138.5 mi
Oct 1712.0 mph0.0 mph5.2 mph25.0 mph0.0 mph12.8 mph302° WNW123.9 mi
Oct 188.0 mph0.0 mph2.3 mph23.0 mph0.0 mph5.6 mph272° W54.4 mi
Oct 1910.0 mph0.0 mph4.4 mph21.0 mph0.0 mph12.1 mph250° WSW104.8 mi
Oct 209.0 mph0.0 mph4.9 mph20.0 mph0.0 mph12.3 mph350° N116.3 mi
Oct 2111.0 mph0.0 mph6.0 mph23.0 mph0.0 mph14.6 mph346° NNW144.8 mi
Oct 228.0 mph1.0 mph4.0 mph16.0 mph0.0 mph10.2 mph310° NW96.4 mi
Oct 239.0 mph0.0 mph3.0 mph18.0 mph0.0 mph8.0 mph301° WNW72.3 mi
Oct 247.0 mph0.0 mph3.6 mph17.0 mph0.0 mph10.9 mph338° NNW87.6 mi
Oct 258.0 mph0.0 mph3.4 mph22.0 mph0.0 mph12.0 mph54° NE81.9 mi
Oct 267.0 mph1.0 mph2.9 mph18.0 mph1.0 mph10.9 mph37° NE23.4 mi
SUMMARYHigh SustainedLow SustainedAvg SustainedHigh GustLow GustAvg GustAvg DirectionWind Run
Max13.0 mph1.0 mph6.0 mph27.0 mph3.0 mph14.6 mph144.8 mi
Min2.0 mph0.0 mph0.3 mph7.0 mph0.0 mph1.2 mph6.5 mi
Avg7.8 mph0.1 mph3.2 mph17.8 mph0.2 mph8.8 mph302° WNW75.8 mi
Total1971.4 mi


Oct 010.00"0.0"
Oct 020.00"0.0"
Oct 030.07"0.0"
Oct 040.06"0.0"
Oct 050.00"0.0"
Oct 060.00"0.0"
Oct 070.00"0.0"
Oct 080.03"0.0"
Oct 090.00"0.0"
Oct 100.00"0.0"
Oct 110.01"0.0"
Oct 120.76"0.0"
Oct 130.11"0.0"
Oct 140.00"0.0"
Oct 150.00"0.0"
Oct 160.00"0.0"
Oct 170.00"0.0"
Oct 180.00"0.0"
Oct 190.00"0.0"
Oct 200.12"0.0"
Oct 210.50"0.0"
Oct 220.08"0.0"
Oct 230.02"0.0"
Oct 240.20"0.0"
Oct 250.10"0.0"
Oct 260.01"0.0"
>= 0.01"13 days
>= 0.10"6 days0 days
>= 1"0 days0 days
>= 4"0 days0 days
>= 8"0 days


DayHigh PressureLow PressureAvg Pressure
Oct 0130.18"30.01"30.10"
Oct 0230.02"29.85"29.92"
Oct 0329.93"29.84"29.87"
Oct 0430.21"29.92"30.07"
Oct 0530.34"30.20"30.30"
Oct 0630.36"30.26"30.31"
Oct 0730.27"30.11"30.21"
Oct 0830.11"29.98"30.04"
Oct 0929.99"29.85"29.92"
Oct 1029.85"29.57"29.68"
Oct 1129.79"29.57"29.67"
Oct 1229.89"29.78"29.82"
Oct 1329.93"29.74"29.87"
Oct 1429.85"29.69"29.74"
Oct 1529.89"29.80"29.85"
Oct 1629.91"29.78"29.83"
Oct 1730.03"29.91"29.95"
Oct 1830.10"29.97"30.04"
Oct 1929.98"29.89"29.94"
Oct 2030.10"29.95"30.04"
Oct 2130.07"29.90"29.98"
Oct 2230.06"30.01"30.04"
Oct 2330.03"29.99"30.01"
Oct 2430.12"29.99"30.06"
Oct 2530.20"30.10"30.16"
Oct 2630.20"30.16"30.18"
SUMMARYHigh PressureLow PressureAvg Pressure


DayHigh UVDaytime Avg UVHigh RadiationDaytime Avg RadiationTotal Radiation
Oct 014.21.8617 W/m2293 W/m212.30 MJ/m2
Oct 024.61.5759 W/m2215 W/m28.99 MJ/m2
Oct 031.40.4230 W/m265 W/m22.69 MJ/m2
Oct 041.90.5220 W/m270 W/m22.90 MJ/m2
Oct 054.51.9621 W/m2304 W/m212.54 MJ/m2
Oct 064.41.9612 W/m2299 W/m212.29 MJ/m2
Oct 074.61.5733 W/m2216 W/m28.81 MJ/m2
Oct 083.30.7629 W/m2100 W/m24.05 MJ/m2
Oct 094.21.7671 W/m2262 W/m210.61 MJ/m2
Oct 103.30.8438 W/m2124 W/m25.01 MJ/m2
Oct 114.31.2744 W/m2185 W/m27.43 MJ/m2
Oct 122.30.5304 W/m275 W/m22.98 MJ/m2
Oct 133.40.8601 W/m2122 W/m24.85 MJ/m2
Oct 144.01.3650 W/m2201 W/m27.95 MJ/m2
Oct 153.61.2717 W/m2195 W/m27.66 MJ/m2
Oct 163.31.1793 W/m2207 W/m28.08 MJ/m2
Oct 173.01.3613 W/m2275 W/m210.71 MJ/m2
Oct 183.21.4554 W/m2270 W/m210.45 MJ/m2
Oct 193.31.4561 W/m2258 W/m29.95 MJ/m2
Oct 200.60.076 W/m233 W/m21.25 MJ/m2
Oct 211.50.4559 W/m291 W/m23.49 MJ/m2
Oct 222.70.9649 W/m2171 W/m26.50 MJ/m2
Oct 232.70.9722 W/m2173 W/m26.53 MJ/m2
Oct 242.70.7744 W/m2148 W/m25.58 MJ/m2
Oct 251.40.3211 W/m268 W/m22.54 MJ/m2
Oct 260.00.00 W/m20 W/m20.00 MJ/m2
SUMMARYHigh UVDaytime Avg UVHigh RadiationDaytime Avg RadiationTotal Radiation
Max4.61.9793 W/m2304 W/m212.54 MJ/m2
Min0.00.00 W/m20 W/m20.00 MJ/m2
Avg3.01.0540 W/m2177 W/m26.77 MJ/m2
Total176.12 MJ/m2
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Yearly History


MonthHigh TempLow TempAvg (NWS)AvgHDDCDDHigh Heat IndexAvg Heat IndexLow Wind ChillAvg Wind Chill
SUMMARYHigh TempLow TempAvg (NWS)AvgHDDCDDHigh Heat IndexAvg Heat IndexLow Wind ChillAvg Wind Chill
ThresholdsHigh TempLow Temp 
>= 906 days 
>= 8047 days0 days 
<= 3245 days93 days 
<= 00 days8 days 


MonthHigh HumidityLow HumidityAvg HumidityHigh Dew PointLow Dew PointAvg Dew Point
SUMMARYHigh HumidityLow HumidityAvg HumidityHigh Dew PointLow Dew PointAvg Dew Point


MonthHigh SustainedAvg SustainedHigh GustAvg GustAvg DirectionWind Run
Jan16.0 mph4.3 mph36.0 mph10.5 mph281° W3169.4 mi
Feb16.0 mph5.1 mph36.0 mph12.2 mph283° WNW3444.5 mi
Mar21.0 mph5.8 mph44.0 mph13.8 mph283° WNW4319.7 mi
Apr15.0 mph4.5 mph32.0 mph10.8 mph340° NNW3257.2 mi
May17.0 mph4.4 mph42.0 mph11.1 mph271° W3298.2 mi
Jun16.0 mph3.2 mph35.0 mph8.4 mph261° W2276.7 mi
Jul12.0 mph2.9 mph26.0 mph7.9 mph315° NW2161.2 mi
Aug12.0 mph3.6 mph29.0 mph9.6 mph239° WSW2640.5 mi
Sep16.0 mph4.0 mph36.0 mph10.8 mph263° W2905.5 mi
Oct13.0 mph3.2 mph27.0 mph8.8 mph302° WNW1971.4 mi
SUMMARYHigh SustainedAvg SustainedHigh GustAvg GustAvg DirectionWind Run
Max21.0 mph5.8 mph44.0 mph13.8 mph4319.7 mi
Min12.0 mph2.9 mph26.0 mph7.9 mph1971.4 mi
Avg15.4 mph4.1 mph34.3 mph10.4 mph282° WNW2962.5 mi
Total29444.3 mi


>= 0.01"104 days
>= 0.10"51 days29 days
>= 1"2 days11 days
>= 4"0 days2 days
>= 8"0 days


MonthHigh PressureLow PressureAvg Pressure
SUMMARYHigh PressureLow PressureAvg Pressure


MonthHigh UVDaytime Avg UVHigh RadiationDaytime Avg RadiationTotal Radiation
Jan1.60.3642 W/m2108 W/m2109.81 MJ/m2
Feb2.80.7788 W/m2207 W/m2215.93 MJ/m2
Mar5.51.21056 W/m2239 W/m2319.70 MJ/m2
Apr6.11.51132 W/m2282 W/m2414.51 MJ/m2
May10.52.21361 W/m2344 W/m2577.50 MJ/m2
Jun10.12.61236 W/m2360 W/m2613.24 MJ/m2
Jul9.42.61181 W/m2385 W/m2660.15 MJ/m2
Aug8.62.31114 W/m2325 W/m2512.52 MJ/m2
Sep7.41.81039 W/m2275 W/m2371.16 MJ/m2
Oct4.61.0793 W/m2177 W/m2176.12 MJ/m2
SUMMARYHigh UVDaytime Avg UVHigh RadiationDaytime Avg RadiationTotal Radiation
Max10.52.61361 W/m2385 W/m2660.15 MJ/m2
Min1.60.3642 W/m2108 W/m2109.81 MJ/m2
Avg6.71.71034 W/m2272 W/m2397.07 MJ/m2
Total3970.66 MJ/m2
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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 0.1° 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 3.0° F 2.90" 0.3"
June 67.9° F 50.1° F 59.0° F 2.9° F 3.05" 0.0"
July 74.6° F 57.7° F 66.2° F 1.7° 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 0.5° F 3.34" 0.0"
October 53.9° F 40.0° F 47.0° F -0.3° 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 0.66
Total 30.2" 102.0"
Based on official Marquette NOAA COOP station averages 1991-2020
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Station Records


Highest recorded temperature: 95.2 °F on Jun 6, 2021
Lowest recorded temperature: -14.7 °F on Jan 31, 2019
Total recorded temperature range: 109.9 °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: Jun 14, 2020 with 12.1 hours of sunshine.

Official Weather Data

Forecast Accuracy

Check the accuracy of forecasted temperatures

* * * * *

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  • 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.
  • Graphs at the top are linked to larger, more detailed views that in some cases add information. These larger versions update every 5 minutes. Smaller graphs are updated every minute.
  • Daily and monthly history tables are updated every 5 minutes. Yearly histories are updated at the top of every hour.


  • "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.


  • "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 smaller embedded 24 hour graphs contain uncorrected humidities & dew points. The detailed, larger graphics (available by clicking image) contain corrected values.


  • "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.


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


  • 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.


  • "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).
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