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Oak Forest, IL weather and climate

Cook County, IL · population 26,888 · about 653 ft elevation

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

The year at a glance

Sunny days
182
clear or partly cloudy, per year
Precipitation
39 in
per year
Wet days
130
rain or snow per year
Snowfall
32 in
per year
Hot days
26
above 90 °F
Freezing nights
121
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
255075JanMarMayJulSepNovDaily high, Jan: 32 °FDaily high, Feb: 36 °FDaily high, Mar: 47 °FDaily high, Apr: 60 °FDaily high, May: 72 °FDaily high, Jun: 82 °FDaily high, Jul: 86 °FDaily high, Aug: 84 °FDaily high, Sep: 77 °FDaily high, Oct: 64 °FDaily high, Nov: 49 °FDaily high, Dec: 37 °FDaily low, Jan: 17 °FDaily low, Feb: 20 °FDaily low, Mar: 29 °FDaily low, Apr: 40 °FDaily low, May: 50 °FDaily low, Jun: 60 °FDaily low, Jul: 65 °FDaily low, Aug: 64 °FDaily low, Sep: 56 °FDaily low, Oct: 44 °FDaily low, Nov: 33 °FDaily low, Dec: 23 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Daily high323647607282868477644937
Daily low172029405060656456443323

Monthly precipitation

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

0.02.04.0JanMarMayJulSepNovOak Forest, Jan: 2.3 inOak Forest, Feb: 2.0 inOak Forest, Mar: 2.9 inOak Forest, Apr: 4.4 inOak Forest, May: 4.6 inOak Forest, Jun: 4.3 inOak Forest, Jul: 3.9 inOak Forest, Aug: 3.8 inOak Forest, Sep: 3.0 inOak Forest, Oct: 3.2 inOak Forest, Nov: 2.7 inOak Forest, Dec: 2.2 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Oak Forest2.32.02.94.44.64.33.93.83.03.22.72.2

Monthly sunny days

Days each month with clear or partly cloudy skies.

01020JanMarMayJulSepNovOak Forest, Jan: 11 daysOak Forest, Feb: 11 daysOak Forest, Mar: 14 daysOak Forest, Apr: 13 daysOak Forest, May: 15 daysOak Forest, Jun: 16 daysOak Forest, Jul: 20 daysOak Forest, Aug: 20 daysOak Forest, Sep: 20 daysOak Forest, Oct: 17 daysOak Forest, Nov: 14 daysOak Forest, Dec: 11 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Oak Forest111114131516202020171411

Compare Oak Forest with another city

Nearby cities and popular picks. Any two cities can be compared from the home page.

See weather for every covered Illinois city

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).