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Freeport, IL weather and climate

Stephenson County, IL · population 23,636 · about 791 ft elevation

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

The year at a glance

Sunny days
185
clear or partly cloudy, per year
Precipitation
38 in
per year
Wet days
123
rain or snow per year
Snowfall
35 in
per year
Hot days
10
above 90 °F
Freezing nights
147
at or below 32 °F
Humidity
71%
average relative
Average temperature
48 °F
year round

Monthly temperatures

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

Daily highDaily low
255075JanMarMayJulSepNovDaily high, Jan: 28 °FDaily high, Feb: 33 °FDaily high, Mar: 45 °FDaily high, Apr: 58 °FDaily high, May: 70 °FDaily high, Jun: 79 °FDaily high, Jul: 82 °FDaily high, Aug: 81 °FDaily high, Sep: 74 °FDaily high, Oct: 62 °FDaily high, Nov: 46 °FDaily high, Dec: 33 °FDaily low, Jan: 11 °FDaily low, Feb: 15 °FDaily low, Mar: 26 °FDaily low, Apr: 36 °FDaily low, May: 48 °FDaily low, Jun: 59 °FDaily low, Jul: 62 °FDaily low, Aug: 60 °FDaily low, Sep: 51 °FDaily low, Oct: 39 °FDaily low, Nov: 28 °FDaily low, Dec: 18 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Daily high283345587079828174624633
Daily low111526364859626051392818

Monthly precipitation

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

0.02.04.0JanMarMayJulSepNovFreeport, Jan: 1.8 inFreeport, Feb: 1.8 inFreeport, Mar: 2.6 inFreeport, Apr: 4.3 inFreeport, May: 4.5 inFreeport, Jun: 4.4 inFreeport, Jul: 3.6 inFreeport, Aug: 3.8 inFreeport, Sep: 3.6 inFreeport, Oct: 2.9 inFreeport, Nov: 2.4 inFreeport, Dec: 2.1 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Freeport1.81.82.64.34.54.43.63.83.62.92.42.1

Monthly sunny days

Days each month with clear or partly cloudy skies.

01020JanMarMayJulSepNovFreeport, Jan: 12 daysFreeport, Feb: 12 daysFreeport, Mar: 14 daysFreeport, Apr: 14 daysFreeport, May: 15 daysFreeport, Jun: 16 daysFreeport, Jul: 20 daysFreeport, Aug: 20 daysFreeport, Sep: 20 daysFreeport, Oct: 17 daysFreeport, Nov: 14 daysFreeport, Dec: 12 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Freeport121214141516202020171412

Compare Freeport 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).