Historical Weather Data

Observations began July 2015

JUMP TO: DailyMonthlyYearlyNormalsRecordsNotes

Last 24 hours


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Daily History

Temperature

HourHigh TempLow TempAvgLow Wind ChillAvg Wind Chill
12:00 AM27.5°26.4°26.8°26.4°26.8°
01:00 AM26.6°25.9°26.2°25.9°26.2°
SUMMARYHigh TempLow TempAvgLow Wind ChillAvg Wind Chill
Max27.5°26.4°26.8°26.4°26.8°
Min26.6°25.9°26.2°25.9°26.2°
Avg27.1°26.2°26.6°26.2°26.6°

Humidity

HourHigh HumidityLow HumidityAvg HumidityHigh Dew PointLow Dew PointAvg Dew Point
12:00 AM86%71%78%23.0°19.1°20.9°
01:00 AM90%86%89%23.7°22.9°23.4°
SUMMARYHigh HumidityLow HumidityAvg HumidityHigh Dew PointLow Dew PointAvg Dew Point
Max90%86%89%23.7°22.9°23.4°
Min86%71%78%23.0°19.1°20.9°
Avg88%79%82%23.4°21.0°21.8°

Wind

HourHigh SustainedLow SustainedAvg SustainedHigh GustLow GustAvg GustAvg DirectionWind Run
12:00 AM2.0 mph0.0 mph1.0 mph4.0 mph1.0 mph2.6 mph235° SW1.0 mi
01:00 AM2.0 mph1.0 mph1.9 mph5.0 mph4.0 mph4.3 mph176° S1.1 mi
SUMMARYHigh SustainedLow SustainedAvg SustainedHigh GustLow GustAvg GustAvg DirectionWind Run
Max2.0 mph1.0 mph1.9 mph5.0 mph4.0 mph4.3 mph1.1 mi
Min2.0 mph0.0 mph1.0 mph4.0 mph1.0 mph2.6 mph1.0 mi
Avg2.0 mph0.5 mph1.3 mph4.5 mph2.5 mph3.2 mph214° SSW1.0 mi
Total2.1 mi

Rain

SUMMARYLiquidSnow
Total0.00"0.0"

Pressure

HourHigh PressureLow PressureAvg Pressure
12:00 AM29.76"29.75"29.76"
01:00 AM29.74"29.71"29.72"
SUMMARYHigh PressureLow PressureAvg Pressure
Max29.76"29.75"29.76"
Min29.74"29.71"29.72"
Avg29.75"29.73"29.74"

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 AM111413810
01:00 AM94713810
SUMMARYHigh AQILow AQIAvg AQIHigh EPA AQILow EPA AQIAvg EPA AQI
Max114713810
Min91413810
Avg103513810
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Monthly History

Temperature

DayHigh TempLow TempAvg (NWS)AvgHDDCDDLow Wind ChillAvg Wind Chill
Mar 0152.0°16.2°34.0°36.4°28.60.013.2°31.1°
Mar 0251.6°35.9°44.0°42.5°22.50.027.5°39.4°
Mar 0353.0°30.2°41.5°41.8°23.20.030.2°38.9°
Mar 0453.2°35.3°44.0°42.6°22.40.035.3°42.0°
Mar 0535.5°27.2°31.0°32.3°32.70.023.8°28.8°
Mar 0639.4°24.8°32.0°31.7°33.30.020.7°31.3°
Mar 0752.9°26.9°40.0°39.2°25.80.026.9°36.7°
Mar 0838.8°30.1°34.5°33.5°31.50.021.9°29.5°
Mar 0931.8°25.1°28.5°29.3°35.70.014.3°20.3°
Mar 1037.5°25.6°32.0°31.7°33.30.019.0°25.2°
Mar 1155.8°25.5°41.0°39.5°25.50.025.5°38.4°
Mar 1264.3°34.2°49.0°45.4°19.60.034.2°45.2°
Mar 1352.8°33.8°43.5°42.9°22.10.033.8°42.6°
Mar 1438.0°32.6°35.5°34.8°30.20.026.3°30.5°
Mar 1547.1°29.8°38.5°37.3°27.70.023.9°34.6°
Mar 1645.8°29.9°38.0°39.8°25.20.021.5°34.5°
Mar 1729.9°20.8°25.5°23.8°41.20.09.1°14.1°
Mar 1828.2°22.2°25.0°25.7°39.30.010.5°19.6°
Mar 1927.5°25.9°27.0°26.6°38.40.025.9°26.6°
SUMMARYHigh TempLow TempAvg (NWS)AvgHDDCDDLow Wind ChillAvg Wind Chill
Max64.3°35.9°49.0°45.4°41.20.035.3°45.2°
Min27.5°16.2°25.0°23.8°19.60.09.1°14.1°
Avg44.0°28.0°36.5°36.1°29.40.023.3°32.4°
Total558.30.0
ThresholdsHigh TempLow Temp 
>= 900 days 
>= 800 days0 days 
<= 324 days14 days 
<= 00 days0 days 

Humidity

DayHigh HumidityLow HumidityAvg HumidityHigh Dew PointLow Dew PointAvg Dew Point
Mar 0188%25%53%26.3°6.9°19.2°
Mar 0278%48%62%35.8°24.1°30.1°
Mar 03100%65%86%44.0°29.7°37.5°
Mar 04100%31%81%44.0°23.2°36.3°
Mar 05100%61%71%35.5°21.2°23.8°
Mar 0696%65%81%30.2°19.2°26.4°
Mar 0794%20%57%32.2°12.0°23.5°
Mar 0896%68%78%32.4°21.1°27.3°
Mar 0990%65%77%25.7°19.2°22.8°
Mar 1071%47%61%21.6°15.7°19.5°
Mar 1169%27%43%27.3°9.5°18.1°
Mar 1280%33%57%37.9°21.8°30.5°
Mar 1380%42%61%34.0°25.5°30.0°
Mar 1492%71%83%35.5°25.3°30.0°
Mar 1592%45%71%31.6°23.5°28.0°
Mar 1686%49%62%34.3°22.2°27.7°
Mar 1792%62%77%26.3°12.0°17.6°
Mar 1886%62%73%22.2°14.9°18.0°
Mar 1987%76%83%22.9°20.7°22.0°
SUMMARYHigh HumidityLow HumidityAvg HumidityHigh Dew PointLow Dew PointAvg Dew Point
Max100%76%86%44.0°29.7°37.5°
Min69%20%43%21.6°6.9°17.6°
Avg88%51%69%31.6°19.4°25.9°

Wind

DayHigh SustainedLow SustainedAvg SustainedHigh GustLow GustAvg GustAvg DirectionWind Run
Mar 0116.0 mph0.0 mph9.4 mph36.0 mph2.0 mph22.3 mph188° S225.1 mi
Mar 0213.0 mph0.0 mph6.0 mph27.0 mph1.0 mph14.2 mph186° S142.9 mi
Mar 0315.0 mph0.0 mph6.9 mph29.0 mph0.0 mph15.8 mph153° SSE166.0 mi
Mar 0411.0 mph0.0 mph2.5 mph23.0 mph0.0 mph6.9 mph155° SSE60.7 mi
Mar 0510.0 mph0.0 mph4.6 mph21.0 mph0.0 mph10.5 mph334° NNW111.3 mi
Mar 065.0 mph0.0 mph2.5 mph11.0 mph0.0 mph5.8 mph327° NNW59.3 mi
Mar 0712.0 mph0.0 mph5.0 mph23.0 mph0.0 mph11.9 mph165° SSE119.3 mi
Mar 089.0 mph0.0 mph4.9 mph21.0 mph0.0 mph11.5 mph325° NW117.9 mi
Mar 0915.0 mph7.0 mph10.2 mph34.0 mph13.0 mph22.5 mph322° NW233.4 mi
Mar 1014.0 mph0.0 mph8.1 mph29.0 mph0.0 mph18.5 mph334° NNW187.4 mi
Mar 1112.0 mph0.0 mph3.1 mph25.0 mph0.0 mph7.6 mph199° SSW74.7 mi
Mar 129.0 mph0.0 mph2.7 mph19.0 mph0.0 mph7.0 mph212° SSW65.1 mi
Mar 135.0 mph0.0 mph2.1 mph12.0 mph0.0 mph5.3 mph10° N51.5 mi
Mar 149.0 mph0.0 mph5.4 mph19.0 mph0.0 mph12.0 mph320° NW130.4 mi
Mar 157.0 mph0.0 mph3.9 mph16.0 mph0.0 mph8.9 mph315° NW93.0 mi
Mar 1615.0 mph1.0 mph8.2 mph30.0 mph2.0 mph18.9 mph271° W196.9 mi
Mar 1713.0 mph5.0 mph9.2 mph27.0 mph11.0 mph19.6 mph312° NW220.9 mi
Mar 1812.0 mph0.0 mph6.0 mph26.0 mph0.0 mph13.9 mph317° NW142.9 mi
Mar 192.0 mph0.0 mph1.3 mph5.0 mph1.0 mph3.2 mph214° SSW2.1 mi
SUMMARYHigh SustainedLow SustainedAvg SustainedHigh GustLow GustAvg GustAvg DirectionWind Run
Max16.0 mph7.0 mph10.2 mph36.0 mph13.0 mph22.5 mph233.4 mi
Min2.0 mph0.0 mph1.3 mph5.0 mph0.0 mph3.2 mph2.1 mi
Avg10.7 mph0.7 mph5.6 mph22.8 mph1.6 mph12.9 mph295° WNW126.3 mi
Total2400.6 mi

Rain

DayLiquidSnow
Mar 010.00"0.0"
Mar 020.00"0.0"
Mar 030.14"0.0"
Mar 040.31"0.0"
Mar 050.00"0.0"
Mar 060.00"0.0"
Mar 070.00"0.0"
Mar 080.00"0.0"
Mar 090.00"0.0"
Mar 100.00"0.0"
Mar 110.00"0.0"
Mar 120.00"0.0"
Mar 130.00"0.0"
Mar 140.00"0.0"
Mar 150.00"0.0"
Mar 160.00"0.0"
Mar 170.07"0.0"
Mar 180.03"0.0"
Mar 190.00"0.0"
SUMMARYLiquidSnow
Max0.31"0.0"
Min0.00"0.0"
Avg0.03"0.0"
Total0.55"0.0"
ThresholdsLiquidSnow
>= 0.01"4 days
>= 0.10"2 days0 days
>= 1"0 days0 days
>= 4"0 days0 days
>= 8"0 days

Pressure

DayHigh PressureLow PressureAvg Pressure
Mar 0130.14"29.81"29.93"
Mar 0229.97"29.87"29.92"
Mar 0329.99"29.60"29.82"
Mar 0430.00"29.67"29.91"
Mar 0530.19"29.97"30.13"
Mar 0630.28"30.18"30.23"
Mar 0730.20"30.05"30.13"
Mar 0830.14"29.94"30.08"
Mar 0929.94"29.81"29.86"
Mar 1030.08"29.92"30.02"
Mar 1130.04"29.77"29.87"
Mar 1229.80"29.56"29.68"
Mar 1330.03"29.71"29.88"
Mar 1430.16"30.03"30.10"
Mar 1530.17"29.72"30.04"
Mar 1629.72"29.44"29.54"
Mar 1729.96"29.62"29.78"
Mar 1830.09"29.76"29.98"
Mar 1929.76"29.71"29.74"
SUMMARYHigh PressureLow PressureAvg Pressure
Max30.28"30.18"30.23"
Min29.72"29.44"29.54"
Avg30.04"29.80"29.94"

Solar

DayHigh UVDaytime Avg UVHigh RadiationDaytime Avg RadiationTotal Radiation
Mar 012.91.3592 W/m2316 W/m212.73 MJ/m2
Mar 022.81.3612 W/m2295 W/m211.95 MJ/m2
Mar 031.30.5468 W/m2103 W/m24.20 MJ/m2
Mar 041.90.4652 W/m296 W/m23.92 MJ/m2
Mar 053.01.4626 W/m2329 W/m213.50 MJ/m2
Mar 062.81.3647 W/m2333 W/m213.74 MJ/m2
Mar 073.01.2803 W/m2312 W/m212.95 MJ/m2
Mar 082.30.7496 W/m2161 W/m26.70 MJ/m2
Mar 091.30.3253 W/m278 W/m23.28 MJ/m2
Mar 103.01.4656 W/m2347 W/m214.59 MJ/m2
Mar 113.51.5645 W/m2331 W/m213.99 MJ/m2
Mar 123.51.4661 W/m2306 W/m212.99 MJ/m2
Mar 133.51.5675 W/m2316 W/m213.47 MJ/m2
Mar 141.40.5350 W/m2105 W/m24.49 MJ/m2
Mar 153.41.5691 W/m2321 W/m213.85 MJ/m2
Mar 163.70.8784 W/m2173 W/m27.50 MJ/m2
Mar 172.80.8531 W/m2161 W/m26.98 MJ/m2
Mar 182.40.8429 W/m2150 W/m26.53 MJ/m2
Mar 190.00.00 W/m20 W/m20.00 MJ/m2
SUMMARYHigh UVDaytime Avg UVHigh RadiationDaytime Avg RadiationTotal Radiation
Max3.71.5803 W/m2347 W/m214.59 MJ/m2
Min0.00.00 W/m20 W/m20.00 MJ/m2
Avg2.61.0556 W/m2235 W/m29.34 MJ/m2
Total177.37 MJ/m2

Air

DayHigh AQILow AQIAvg AQIHigh EPA AQILow EPA AQIAvg EPA AQI
Mar 01881348591738
Mar 02954863683347
Mar 031245185932960
Mar 047802255417
Mar 05510633010
Mar 06831959010
Mar 07270221013
Mar 0830172149
Mar 097021305
Mar 1025109211416
Mar 1162023531327
Mar 129315166840
Mar 1318209170815
Mar 14117178948
Mar 1525022508
Mar 1647033349
Mar 17102007406
Mar 1839012908
Mar 19111513010
SUMMARYHigh AQILow AQIAvg AQIHigh EPA AQILow EPA AQIAvg EPA AQI
Max25151852113360
Min7001305
Avg8061962719
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Yearly History

Temperature

MonthHigh TempLow TempAvg (NWS)AvgHDDCDDHigh Heat IndexAvg Heat IndexLow Wind ChillAvg Wind Chill
Jan50.1°-4.8°23.2°23.6°1284.00.050.1°23.6°-23.3°19.3°
Feb51.0°6.3°29.6°29.2°1038.10.051.0°29.2°-9.0°25.3°
Mar64.3°16.2°36.5°36.1°558.10.064.3°36.1°9.1°32.4°
SUMMARYHigh TempLow TempAvg (NWS)AvgHDDCDDHigh Heat IndexAvg Heat IndexLow Wind ChillAvg Wind Chill
Max64.3°16.2°36.5°36.1°1284.00.064.3°36.1°9.1°32.4°
Min50.1°-4.8°23.2°23.6°558.10.050.1°23.6°-23.3°19.3°
Avg55.1°5.9°28.7°28.6°960.10.055.1°28.6°-7.8°24.5°
Total2880.30.0
ThresholdsHigh TempLow Temp 
>= 900 days 
>= 800 days0 days 
<= 3234 days67 days 
<= 00 days2 days 

Humidity

MonthHigh HumidityLow HumidityAvg HumidityHigh Dew PointLow Dew PointAvg Dew Point
Jan100%46%81%37.2°-13.9°18.4°
Feb100%26%73%42.2°-0.8°21.2°
Mar100%20%69%44.0°6.9°25.9°
SUMMARYHigh HumidityLow HumidityAvg HumidityHigh Dew PointLow Dew PointAvg Dew Point
Max100%46%81%44.0°6.9°25.9°
Min100%20%69%37.2°-13.9°18.4°
Avg100%31%75%41.1°-2.6°21.2°

Wind

MonthHigh SustainedAvg SustainedHigh GustAvg GustAvg DirectionWind Run
Jan17.0 mph4.1 mph39.0 mph10.2 mph273° W3084.1 mi
Feb18.0 mph4.8 mph37.0 mph11.4 mph265° W3321.4 mi
Mar16.0 mph5.6 mph36.0 mph12.9 mph295° WNW2399.5 mi
SUMMARYHigh SustainedAvg SustainedHigh GustAvg GustAvg DirectionWind Run
Max18.0 mph5.6 mph39.0 mph12.9 mph3321.4 mi
Min16.0 mph4.1 mph36.0 mph10.2 mph2399.5 mi
Avg17.0 mph4.7 mph37.3 mph11.3 mph273° W3021.7 mi
Total8805.1 mi

Rain

MonthLiquidSnow
Jan1.69"0.6"
Feb0.70"0.0"
Mar0.55"0.0"
SUMMARYLiquidSnow
Max1.69"0.6"
Min0.55"0.0"
Avg0.98"0.2"
Total2.94"0.6"
ThresholdsLiquidSnow
>= 0.01"27 days
>= 0.10"9 days1 day
>= 1"0 days0 days
>= 4"0 days0 days
>= 8"0 days

Pressure

MonthHigh PressureLow PressureAvg Pressure
Jan30.45"29.21"29.97"
Feb30.37"29.20"29.90"
Mar30.28"29.44"29.94"
SUMMARYHigh PressureLow PressureAvg Pressure
Max30.45"29.44"29.97"
Min30.28"29.20"29.90"
Avg30.36"29.28"29.94"

Solar

MonthHigh UVDaytime Avg UVHigh RadiationDaytime Avg RadiationTotal Radiation
Jan1.70.2584 W/m285 W/m286.57 MJ/m2
Feb2.70.6856 W/m2163 W/m2177.25 MJ/m2
Mar3.71.0803 W/m2235 W/m2177.37 MJ/m2
SUMMARYHigh UVDaytime Avg UVHigh RadiationDaytime Avg RadiationTotal Radiation
Max3.71.0856 W/m2235 W/m2177.37 MJ/m2
Min1.70.2584 W/m285 W/m286.57 MJ/m2
Avg2.70.6748 W/m2149 W/m2147.07 MJ/m2
Total441.20 MJ/m2

Air

MonthHigh AQILow AQIAvg AQIHigh EPA AQILow EPA AQIAvg EPA AQI
Jan232022197019
Feb132025107022
Mar251019211019
SUMMARYHigh AQILow AQIAvg AQIHigh EPA AQILow EPA AQIAvg EPA AQI
Max251025211022
Min132019107019
Avg205022172020
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Marquette, MI Normals

Month TempHi TempLo TempAv Depart Rain Snow
January 24.6° F 12.4° F 18.5° F -0.6° F 1.86" 25.1"
February 26.9° F 12.5° F 19.7° F -0.2° 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 0.4° 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 -0.1° 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 0.63
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 50 or below and sustained wind speed is greater than 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 ran from October 2017 through December 2023. Snowfall is no longer measured.
  • 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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