Historical Weather Data

Observations began July 2015

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Last 24 hours:

Temperature graph Wind chill graph Humidity graph Dew point graph Wind direction graph Wind speed graph Barometric Pressure graph
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Daily History

Temperature

HourHigh TempLow TempAvgLow Wind ChillAvg Wind Chill
12:00 AM17.9°14.8°15.9°14.8°15.9°
01:00 AM22.8°18.3°21.0°18.3°21.0°
02:00 AM25.9°22.4°24.1°20.7°22.7°
03:00 AM26.1°25.5°25.8°20.1°21.7°
04:00 AM26.1°25.6°25.9°19.6°21.7°
05:00 AM25.6°24.8°25.1°17.6°18.8°
06:00 AM25.0°24.6°24.8°16.3°17.4°
07:00 AM24.7°24.5°24.6°17.3°17.9°
08:00 AM25.1°24.6°24.8°17.6°18.5°
09:00 AM26.5°25.1°25.7°18.0°19.4°
10:00 AM29.2°26.4°27.7°20.1°21.6°
11:00 AM29.4°28.6°29.0°22.1°22.9°
12:00 PM31.1°29.0°29.8°23.1°23.9°
01:00 PM33.6°30.5°32.3°24.9°26.9°
02:00 PM34.9°33.1°34.1°29.2°32.2°
03:00 PM35.5°34.8°35.1°30.6°32.7°
04:00 PM35.4°34.4°35.0°34.4°35.0°
05:00 PM34.8°27.8°29.9°27.8°29.9°
06:00 PM27.8°26.1°27.0°26.1°27.0°
07:00 PM26.4°24.5°25.6°24.6°25.6°
08:00 PM24.7°22.5°23.5°22.5°23.5°
09:00 PM23.1°22.1°22.5°22.1°22.5°
10:00 PM24.8°22.8°23.8°22.8°23.8°
11:00 PM24.7°23.9°24.3°23.9°24.3°
SUMMARYHigh TempLow TempAvgLow Wind ChillAvg Wind Chill
Max35.5°34.8°35.1°34.4°35.0°
Min17.9°14.8°15.9°14.8°15.9°
Avg27.5°25.7°26.6°22.3°23.6°

Humidity & Dew Point

HourHigh HumidityLow HumidityAvg HumidityHigh Dew PointLow Dew PointAvg Dew Point
12:00 AM88%84%86%14.1°11.3°12.4°
01:00 AM85%79%82%17.7°14.6°16.4°
02:00 AM81%71%77%18.5°16.9°17.8°
03:00 AM73%71%72%18.3°17.7°18.0°
04:00 AM73%71%72%18.3°17.9°18.1°
05:00 AM76%73%75%18.5°18.1°18.3°
06:00 AM76%76%76%18.5°18.1°18.3°
07:00 AM76%75%76%18.2°17.8°18.1°
08:00 AM76%74%75%18.2°17.7°17.9°
09:00 AM74%72%73%18.7°17.7°18.1°
10:00 AM72%66%70%20.0°18.6°19.1°
11:00 AM67%63%65%19.6°18.1°18.9°
12:00 PM67%63%65%20.4°19.1°19.5°
01:00 PM64%60%62%21.7°19.4°20.6°
02:00 PM61%56%59%22.2°20.2°21.3°
03:00 PM58%54%56%21.8°19.9°21.0°
04:00 PM59%55%57%22.0°20.7°21.3°
05:00 PM76%57%71%21.9°20.8°21.4°
06:00 PM81%76%78%21.5°20.4°21.0°
07:00 PM82%81%82%21.4°19.8°20.8°
08:00 PM85%82%83%20.0°18.4°19.2°
09:00 PM85%84%85%19.3°18.1°18.6°
10:00 PM86%84%85%20.9°19.0°19.9°
11:00 PM85%84%85%20.8°19.9°20.3°
SUMMARYHigh HumidityLow HumidityAvg HumidityHigh Dew PointLow Dew PointAvg Dew Point
Max88%84%86%22.2°20.8°21.4°
Min58%54%56%14.1°11.3°12.4°
Avg75%71%73%19.7°18.3°19.0°

Wind

HourHigh 10 Min AvgLow 10 Min AvgAvg 10 Min AvgHigh MaxLow MaxAvg MaxAvg DirectionWind Run
12:00 AM2.0 mph1.0 mph1.7 mph3.0 mph2.0 mph2.9 mph261° W1.7 mi
01:00 AM2.0 mph1.0 mph1.8 mph4.0 mph3.0 mph3.8 mph262° W1.8 mi
02:00 AM4.0 mph1.0 mph2.1 mph9.0 mph2.0 mph5.1 mph255° WSW2.1 mi
03:00 AM5.0 mph3.0 mph4.0 mph9.0 mph7.0 mph8.4 mph239° WSW4.0 mi
04:00 AM5.0 mph3.0 mph4.2 mph10.0 mph7.0 mph8.8 mph233° SW4.2 mi
05:00 AM6.0 mph4.0 mph5.2 mph13.0 mph9.0 mph10.4 mph221° SW5.2 mi
06:00 AM8.0 mph6.0 mph6.4 mph15.0 mph12.0 mph13.6 mph223° SW6.4 mi
07:00 AM6.0 mph5.0 mph5.6 mph14.0 mph11.0 mph11.6 mph222° SW5.6 mi
08:00 AM6.0 mph4.0 mph5.2 mph12.0 mph8.0 mph10.4 mph227° SW5.2 mi
09:00 AM6.0 mph4.0 mph5.2 mph12.0 mph10.0 mph11.4 mph227° SW5.2 mi
10:00 AM6.0 mph5.0 mph5.4 mph12.0 mph9.0 mph10.6 mph229° SW5.4 mi
11:00 AM7.0 mph5.0 mph5.8 mph15.0 mph10.0 mph12.6 mph198° SSW5.8 mi
12:00 PM7.0 mph5.0 mph5.6 mph13.0 mph10.0 mph11.7 mph206° SSW5.6 mi
01:00 PM8.0 mph3.0 mph5.7 mph15.0 mph9.0 mph13.4 mph216° SW5.7 mi
02:00 PM5.0 mph2.0 mph3.5 mph12.0 mph6.0 mph10.3 mph239° WSW3.5 mi
03:00 PM5.0 mph3.0 mph3.8 mph12.0 mph7.0 mph10.2 mph254° WSW3.8 mi
04:00 PM3.0 mph2.0 mph2.5 mph7.0 mph2.0 mph6.2 mph232° SW2.5 mi
05:00 PM3.0 mph2.0 mph2.7 mph8.0 mph5.0 mph7.2 mph330° NNW2.7 mi
06:00 PM3.0 mph2.0 mph2.4 mph6.0 mph3.0 mph5.0 mph325° NW2.4 mi
07:00 PM3.0 mph2.0 mph2.1 mph4.0 mph3.0 mph3.8 mph329° NNW2.0 mi
08:00 PM2.0 mph1.0 mph1.6 mph4.0 mph2.0 mph3.2 mph329° NNW1.7 mi
09:00 PM2.0 mph1.0 mph1.5 mph3.0 mph3.0 mph3.0 mph329° NNW1.5 mi
10:00 PM1.0 mph0.0 mph0.4 mph3.0 mph0.0 mph1.1 mph329° NNW0.4 mi
11:00 PM2.0 mph0.0 mph1.0 mph3.0 mph0.0 mph2.2 mph329° NNW0.9 mi
SUMMARYHigh 10 Min AvgLow 10 Min AvgAvg 10 Min AvgHigh MaxLow MaxAvg MaxAvg DirectionWind Run
Max8.0 mph6.0 mph6.4 mph15.0 mph12.0 mph13.6 mph6.4 mi
Min1.0 mph0.0 mph0.4 mph3.0 mph0.0 mph1.1 mph0.4 mi
Avg4.5 mph2.7 mph3.6 mph9.1 mph5.8 mph7.8 mph253° WSW3.6 mi
Total85.3 mi

Precipitation

DateLiquidSnow
2019-02-220.00"0.0"

Pressure

HourHigh PressureLow PressureAvg Pressure
12:00 AM30.28"30.26"30.27"
01:00 AM30.29"30.27"30.28"
02:00 AM30.32"30.29"30.30"
03:00 AM30.32"30.31"30.32"
04:00 AM30.33"30.32"30.32"
05:00 AM30.34"30.32"30.33"
06:00 AM30.35"30.34"30.34"
07:00 AM30.36"30.35"30.36"
08:00 AM30.38"30.36"30.37"
09:00 AM30.39"30.37"30.38"
10:00 AM30.38"30.36"30.37"
11:00 AM30.37"30.36"30.36"
12:00 PM30.37"30.36"30.36"
01:00 PM30.36"30.36"30.36"
02:00 PM30.36"30.35"30.35"
03:00 PM30.35"30.33"30.34"
04:00 PM30.34"30.33"30.33"
05:00 PM30.34"30.33"30.34"
06:00 PM30.34"30.33"30.33"
07:00 PM30.35"30.33"30.34"
08:00 PM30.36"30.34"30.35"
09:00 PM30.36"30.34"30.35"
10:00 PM30.36"30.34"30.35"
11:00 PM30.35"30.33"30.34"
SUMMARYHigh PressureLow PressureAvg Pressure
Max30.39"30.37"30.38"
Min30.28"30.26"30.27"
Avg30.35"30.33"30.34"
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Monthly History

Temperature

DayHigh TempLow TempAvg (NWS)AvgHDDCDDLow Wind ChillAvg Wind Chill
Feb 0116.9°-7.8°4.5°5.3°59.70.0-18.1°-1.1°
Feb 0223.9°14.1°19.0°20.7°44.30.02.4°19.2°
Feb 0332.8°22.4°27.5°27.8°37.20.016.7°25.9°
Feb 0431.6°13.3°22.5°26.1°38.90.013.3°25.4°
Feb 0516.7°10.0°13.5°13.9°51.10.010.0°13.9°
Feb 0622.7°13.9°18.5°18.6°46.40.013.9°18.6°
Feb 0722.5°13.8°18.0°19.7°45.30.013.8°19.7°
Feb 0813.8°2.6°8.5°6.4°58.60.0-9.3°2.6°
Feb 0912.8°4.7°9.0°8.3°56.70.0-6.1°5.8°
Feb 1017.7°4.9°11.5°13.0°52.00.04.9°13.0°
Feb 1122.2°5.1°13.5°15.7°49.30.05.1°15.6°
Feb 1222.5°12.3°17.0°19.0°46.00.07.3°12.9°
Feb 1326.4°10.4°18.0°18.4°46.60.0-1.8°9.9°
Feb 1429.1°10.1°19.5°22.8°42.20.08.9°20.9°
Feb 1524.3°17.5°20.5°19.4°45.60.04.0°7.5°
Feb 1620.2°8.2°14.0°14.9°50.10.02.2°9.5°
Feb 1722.2°13.1°17.5°18.2°46.80.06.2°13.9°
Feb 1819.4°-1.1°9.0°12.1°52.90.0-1.1°5.1°
Feb 1925.6°-1.1°12.5°13.0°52.00.0-3.2°9.8°
Feb 2024.8°10.0°17.5°18.9°46.10.04.9°17.6°
Feb 2131.8°15.1°23.5°24.5°40.50.015.1°21.6°
Feb 2235.5°14.8°25.0°26.6°38.40.014.8°23.6°
SUMMARYHigh TempLow TempAvg (NWS)AvgHDDCDDLow Wind ChillAvg Wind Chill
Max35.5°22.4°27.5°27.8°59.70.016.7°25.9°
Min12.8°-7.8°4.5°5.3°37.20.0-18.1°-1.1°
Avg23.4°9.4°16.4°17.4°47.60.04.7°14.2°
Total1046.80.0
ThresholdsHigh TempLow Temp 
>= 800 days 
<= 3220 days22 days 
<= 00 days3 days 

Humidity & Dew Point

DayHigh HumidityLow HumidityAvg HumidityHigh Dew PointLow Dew PointAvg Dew Point
Feb 0168%32%52%4.9°-20.0°-9.0°
Feb 0279%65%72%18.3°4.5°13.1°
Feb 0394%76%88%28.8°16.8°24.8°
Feb 0497%76%91%30.3°8.0°23.9°
Feb 0585%72%79%12.3°4.0°8.5°
Feb 0688%79%84%18.6°10.2°14.5°
Feb 0792%75%88%19.3°7.3°16.6°
Feb 0875%60%68%7.3°-5.5°-1.8°
Feb 0984%70%75%6.4°-1.9°1.9°
Feb 1088%64%79%14.2°0.5°7.6°
Feb 1188%74%83%17.3°1.3°11.4°
Feb 1292%72%83%20.0°7.9°14.8°
Feb 1388%58%77%17.2°6.8°12.1°
Feb 1494%72%86%26.8°6.0°19.2°
Feb 1586%71%78%20.5°10.2°13.6°
Feb 1684%66%75%12.6°4.1°8.5°
Feb 1784%64%76%17.6°8.4°11.9°
Feb 1885%58%74%14.5°-5.5°5.2°
Feb 1983%48%66%11.6°-5.7°3.3°
Feb 2092%62%79%22.2°2.9°13.3°
Feb 2192%65%77%22.1°11.8°18.2°
Feb 2290%60%78%24.5°12.1°20.6°
SUMMARYHigh HumidityLow HumidityAvg HumidityHigh Dew PointLow Dew PointAvg Dew Point
Max97%79%91%30.3°16.8°24.8°
Min68%32%52%4.9°-20.0°-9.0°
Avg87%65%78%17.6°3.8°11.5°

Wind

DayHigh 10 Min AvgLow 10 Min AvgAvg 10 Min AvgHigh MaxLow MaxAvg MaxAvg DirectionWind Run
Feb 0110.0 mph1.0 mph4.8 mph21.0 mph1.0 mph11.9 mph238° WSW115.5 mi
Feb 029.0 mph0.0 mph2.7 mph21.0 mph0.0 mph6.9 mph248° WSW63.9 mi
Feb 0310.0 mph0.0 mph3.1 mph19.0 mph0.0 mph7.9 mph292° WNW74.7 mi
Feb 047.0 mph0.0 mph1.1 mph14.0 mph0.0 mph3.2 mph43° NE26.0 mi
Feb 050.0 mph0.0 mph0.0 mph0.0 mph0.0 mph0.0 mph0° N0.0 mi
Feb 060.0 mph0.0 mph0.0 mph0.0 mph0.0 mph0.0 mph0° N0.0 mi
Feb 070.0 mph0.0 mph0.0 mph0.0 mph0.0 mph0.0 mph0° N0.0 mi
Feb 0812.0 mph0.0 mph2.4 mph22.0 mph0.0 mph5.6 mph291° WNW55.3 mi
Feb 0910.0 mph0.0 mph2.4 mph16.0 mph0.0 mph6.1 mph285° WNW58.1 mi
Feb 103.0 mph0.0 mph1.0 mph6.0 mph0.0 mph2.5 mph228° SW23.9 mi
Feb 114.0 mph0.0 mph1.2 mph10.0 mph0.0 mph3.5 mph120° ESE29.5 mi
Feb 1212.0 mph0.0 mph5.5 mph26.0 mph0.0 mph13.7 mph87° E131.2 mi
Feb 1316.0 mph0.0 mph7.9 mph28.0 mph0.0 mph16.5 mph322° NW188.7 mi
Feb 148.0 mph0.0 mph2.6 mph16.0 mph0.0 mph6.4 mph171° S61.6 mi
Feb 1518.0 mph6.0 mph11.2 mph35.0 mph12.0 mph23.4 mph311° NW269.2 mi
Feb 1610.0 mph1.0 mph4.6 mph18.0 mph3.0 mph9.8 mph315° NW106.8 mi
Feb 179.0 mph2.0 mph4.2 mph19.0 mph4.0 mph10.3 mph339° NNW101.7 mi
Feb 1811.0 mph0.0 mph5.4 mph20.0 mph0.0 mph11.6 mph330° NNW129.4 mi
Feb 198.0 mph0.0 mph2.8 mph20.0 mph0.0 mph7.1 mph251° WSW69.7 mi
Feb 208.0 mph0.0 mph2.1 mph15.0 mph0.0 mph5.1 mph148° SSE50.1 mi
Feb 219.0 mph0.0 mph3.4 mph17.0 mph0.0 mph8.3 mph289° WNW82.4 mi
Feb 228.0 mph0.0 mph3.6 mph15.0 mph0.0 mph7.8 mph253° WSW85.3 mi
SUMMARYHigh 10 Min AvgLow 10 Min AvgAvg 10 Min AvgHigh MaxLow MaxAvg MaxAvg DirectionWind Run
Max18.0 mph6.0 mph11.2 mph35.0 mph12.0 mph23.4 mph269.2 mi
Min0.0 mph0.0 mph0.0 mph0.0 mph0.0 mph0.0 mph0.0 mi
Avg8.3 mph0.5 mph3.3 mph16.3 mph0.9 mph7.6 mph292° WNW78.3 mi
Total1723.2 mi

Precipitation

DayLiquidSnow
Feb 010.00"0.0"
Feb 020.00"0.0"
Feb 030.00"0.0"
Feb 041.08"0.7"
Feb 050.08"0.7"
Feb 060.23"2.3"
Feb 070.71"7.1"
Feb 080.00"0.0"
Feb 090.00"0.0"
Feb 100.00"0.9"
Feb 110.02"0.5"
Feb 120.69"8.0"
Feb 130.22"3.4"
Feb 140.14"1.8"
Feb 150.13"3.0"
Feb 160.00"0.0"
Feb 170.02"1.5"
Feb 180.03"0.9"
Feb 190.00"0.0"
Feb 200.41"5.7"
Feb 210.01"0.1"
Feb 220.00"0.0"
SUMMARYLiquidSnow
Max1.08"8.0"
Min0.00"0.0"
Avg0.17"1.7"
Total3.77"36.6"
ThresholdsLiquidSnow
>= 0.01"13 days
>= 0.10"8 days14 days
>= 1"1 day8 days
>= 4"0 days3 days
>= 8"1 day

Pressure

DayHigh PressureLow PressureAvg Pressure
Feb 0130.25"29.93"30.16"
Feb 0229.94"29.80"29.90"
Feb 0329.85"29.66"29.74"
Feb 0429.95"29.56"29.73"
Feb 0530.27"29.95"30.17"
Feb 0630.15"30.04"30.08"
Feb 0730.09"29.50"29.81"
Feb 0830.55"29.59"30.10"
Feb 0930.79"30.55"30.71"
Feb 1030.63"30.33"30.48"
Feb 1130.36"30.22"30.33"
Feb 1230.22"29.53"29.83"
Feb 1329.82"29.53"29.68"
Feb 1429.81"29.42"29.60"
Feb 1530.05"29.42"29.70"
Feb 1630.18"30.04"30.13"
Feb 1730.15"30.07"30.11"
Feb 1830.52"30.13"30.34"
Feb 1930.54"30.34"30.47"
Feb 2030.34"29.59"29.98"
Feb 2130.26"29.59"29.94"
Feb 2230.39"30.26"30.34"
SUMMARYHigh PressureLow PressureAvg Pressure
Max30.79"30.55"30.71"
Min29.81"29.42"29.60"
Avg30.23"29.87"30.06"
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Yearly History

Temperature

MonthHigh TempLow TempAvg (NWS)AvgHDDCDDHigh Heat IndexAvg Heat IndexLow Wind ChillAvg Wind Chill
Jan39.5°-14.7°14.6°15.2°1544.00.039.5°15.2°-30.8°8.6°
Feb35.5°-7.8°16.3°17.4°1046.70.035.5°17.4°-18.1°14.2°
SUMMARYHigh TempLow TempAvg (NWS)AvgHDDCDDHigh Heat IndexAvg Heat IndexLow Wind ChillAvg Wind Chill
Max39.5°-7.8°16.3°17.4°1544.00.039.5°17.4°-18.1°14.2°
Min35.5°-14.7°14.6°15.2°1046.70.035.5°15.2°-30.8°8.6°
Avg37.5°-11.2°15.4°16.2°1295.40.037.5°16.2°-24.5°11.1°
Total2590.70.0
ThresholdsHigh TempLow Temp 
>= 900 days 
>= 800 days0 days 
<= 3245 days53 days 
<= 00 days10 days 

Humidity & Dew Point

MonthHigh HumidityLow HumidityAvg HumidityHigh Dew PointLow Dew PointAvg Dew Point
Jan95%38%71%33.6°-23.6°7.5°
Feb97%32%78%30.3°-20.0°11.5°
SUMMARYHigh HumidityLow HumidityAvg HumidityHigh Dew PointLow Dew PointAvg Dew Point
Max97%38%78%33.6°-20.0°11.5°
Min95%32%71%30.3°-23.6°7.5°
Avg96%35%74%32.0°-21.8°9.2°

Wind

MonthHigh 10 Min AvgAvg 10 Min AvgHigh MaxAvg MaxAvg DirectionWind Run
Jan17.0 mph5.4 mph33.0 mph12.5 mph277° W4023.4 mi
Feb18.0 mph3.3 mph35.0 mph7.6 mph291° WNW1722.3 mi
SUMMARYHigh 10 Min AvgAvg 10 Min AvgHigh MaxAvg MaxAvg DirectionWind Run
Max18.0 mph5.4 mph35.0 mph12.5 mph4023.4 mi
Min17.0 mph3.3 mph33.0 mph7.6 mph1722.3 mi
Avg17.5 mph4.5 mph34.0 mph10.3 mph281° W3012.0 mi
Total5745.7 mi

Precipitation

MonthLiquidSnow
Jan2.17"23.1"
Feb3.77"36.6"
SUMMARYLiquidSnow
Max3.77"36.6"
Min2.17"23.1"
Avg2.97"29.9"
Total5.94"59.7"
ThresholdsLiquidSnow
>= 0.01"30 days
>= 0.10"16 days30 days
>= 1"1 day16 days
>= 4"0 days4 days
>= 8"1 day

Pressure

MonthHigh PressureLow PressureAvg Pressure
Jan30.57"29.39"30.04"
Feb30.79"29.42"30.06"
SUMMARYHigh PressureLow PressureAvg Pressure
Max30.79"29.42"30.06"
Min30.57"29.39"30.04"
Avg30.68"29.40"30.05"
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Marquette, MI Normals

Month TempHi TempLo TempAv Depart Rain Snow
January 25.0° F 12.5° F 18.8° F -0.4° F 1.83" 29.5"
February 27.8° F 13.6° F 20.7° F -0.1° F 1.31" 20.7"
March 35.9° F 22.1° F 29.0° F 0.0° F 2.00" 21.7"
April 47.3° F 32.9° F 40.1° F 0.9° F 2.45" 7.5"
May 59.4° F 42.6° F 51.0° F 4.0° F 2.53" 0.6"
June 68.3° F 51.5° F 59.9° F 3.0° F 2.68" 0.0"
July 74.5° F 58.6° F 66.6° F 1.7° F 2.82" 0.0"
August 74.2° F 59.0° F 66.6° F 0.6° F 2.63" 0.0"
September 66.8° F 52.0° F 59.4° F 0.7° F 3.16" 0.0"
October 53.9° F 40.6° F 47.3° F -0.4° F 3.13" 1.0"
November 40.3° F 29.3° F 34.8° F -0.4° F 2.62" 10.9"
December 29.1° F 18.0° F 23.5° F -0.5° F 1.97" 25.3"
SUMMARY TempHi TempLo TempAv Depart Rain Snow
Avg 50.2° F 36.0° F 43.1° F 0.77
Total 29.13" 117.2"
Records from Marquette Waste Water Treatment Plant 1981-2010
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Station Records


marquetteweather.com

Highest recorded temperature: 93.5 °F on Jul 21, 2016
Lowest recorded temperature: -14.7 °F on Jan 31, 2019
Total recorded temperature range: 108.2 °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: 49.0 MPH on Jan 31, 2018

Wettest day on record: Jun 18, 2018 with 2.13 in of rain.

Official Records

Forecast Accuracy

screen shot

View the accuracy of current &
past forecasted temperatures

* * * * *

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Notes:

  • 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 along with 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 integrated averages of 1 minute samples 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.
  • "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 10 Min Avg" & "Low Max" wind values are omitted from the yearly history table since every field equals 0.
  • In the daily & monthly history tables, "Wind Chill" appears only October through April. It is calculated when the temperature is 45 or below and average 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.
  • As of July 2018 daily, monthly, and yearly history tables contain corrected humidities and dew points. The corrections only apply to humidities above 91% (or at certain times 70%) where we've identified a predictable "dry bias" in our sensor. 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).
  • "Liquid" precipitation in the winter is the amount of melted snow and/or ice.
  • Snow measurement began in October 2017.
  • 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.
  • Humidity and dewpoint are corrected in all tables according to a custom calibration curve. 24 hour graphs contain uncorrected values.
  • Since January 15, 2018, pressure is recorded in altimeter format. The home page, however, continues to display "Barometer" in MSLP format by default.
  • "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 Waste Water Treatment 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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