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Prospect Heights, IL weather and climate

Cook County, IL · population 15,681 · about 656 ft elevation

Everything below is a 30 year average for 1991-2020, computed from daily climate history at Prospect Heights's own coordinates.

The year at a glance

Sunny days
182
clear or partly cloudy, per year
Precipitation
37 in
per year
Wet days
127
rain or snow per year
Snowfall
36 in
per year
Hot days
17
above 90 °F
Freezing nights
119
at or below 32 °F
Humidity
71%
average relative
Average temperature
51 °F
year round

Monthly temperatures

Average daily high and low for each month, in °F.

Daily highDaily low
20406080JanMarMayJulSepNovDaily high, Jan: 32 °FDaily high, Feb: 36 °FDaily high, Mar: 47 °FDaily high, Apr: 58 °FDaily high, May: 69 °FDaily high, Jun: 80 °FDaily high, Jul: 84 °FDaily high, Aug: 82 °FDaily high, Sep: 75 °FDaily high, Oct: 62 °FDaily high, Nov: 49 °FDaily high, Dec: 37 °FDaily low, Jan: 18 °FDaily low, Feb: 21 °FDaily low, Mar: 30 °FDaily low, Apr: 39 °FDaily low, May: 50 °FDaily low, Jun: 60 °FDaily low, Jul: 66 °FDaily low, Aug: 65 °FDaily low, Sep: 56 °FDaily low, Oct: 44 °FDaily low, Nov: 33 °FDaily low, Dec: 24 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Daily high323647586980848275624937
Daily low182130395060666556443324

Monthly precipitation

Total rain plus melted snow for each month, in inches.

0.02.04.0JanMarMayJulSepNovProspect Heights, Jan: 2.1 inProspect Heights, Feb: 1.9 inProspect Heights, Mar: 2.5 inProspect Heights, Apr: 4.3 inProspect Heights, May: 4.4 inProspect Heights, Jun: 3.9 inProspect Heights, Jul: 3.6 inProspect Heights, Aug: 3.7 inProspect Heights, Sep: 2.9 inProspect Heights, Oct: 3.1 inProspect Heights, Nov: 2.4 inProspect Heights, Dec: 2.1 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Prospect Heights2.11.92.54.34.43.93.63.72.93.12.42.1

Monthly sunny days

Days each month with clear or partly cloudy skies.

01020JanMarMayJulSepNovProspect Heights, Jan: 11 daysProspect Heights, Feb: 11 daysProspect Heights, Mar: 14 daysProspect Heights, Apr: 14 daysProspect Heights, May: 15 daysProspect Heights, Jun: 16 daysProspect Heights, Jul: 20 daysProspect Heights, Aug: 20 daysProspect Heights, Sep: 20 daysProspect Heights, Oct: 16 daysProspect Heights, Nov: 14 daysProspect Heights, Dec: 12 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Prospect Heights111114141516202020161412

Compare Prospect Heights with another city

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About this data

Figures are 30 year averages for 1991-2020. Wet days count days with measurable precipitation, calibrated against the wet day counts in NOAA's published climate normals. Sunny days count clear plus partly cloudy days, defined as average cloud cover of 63 percent or less and calibrated against NOAA's published sky cover tables. Snowfall figures are model estimates anchored to NOAA station measurements near each city.

Weather data by Open-Meteo.com (CC BY 4.0). Contains modified Copernicus Climate Change Service information (ERA5, ERA5-Land).