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Granite City, IL weather and climate

Madison County, IL · population 26,670 · about 427 ft elevation

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

The year at a glance

Sunny days
201
clear or partly cloudy, per year
Precipitation
42 in
per year
Wet days
118
rain or snow per year
Snowfall
13 in
per year
Hot days
39
above 90 °F
Freezing nights
88
at or below 32 °F
Humidity
67%
average relative
Average temperature
57 °F
year round

Monthly temperatures

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

Daily highDaily low
20406080JanMarMayJulSepNovDaily high, Jan: 40 °FDaily high, Feb: 45 °FDaily high, Mar: 55 °FDaily high, Apr: 67 °FDaily high, May: 76 °FDaily high, Jun: 85 °FDaily high, Jul: 89 °FDaily high, Aug: 87 °FDaily high, Sep: 81 °FDaily high, Oct: 69 °FDaily high, Nov: 55 °FDaily high, Dec: 44 °FDaily low, Jan: 23 °FDaily low, Feb: 27 °FDaily low, Mar: 36 °FDaily low, Apr: 46 °FDaily low, May: 57 °FDaily low, Jun: 66 °FDaily low, Jul: 70 °FDaily low, Aug: 68 °FDaily low, Sep: 60 °FDaily low, Oct: 48 °FDaily low, Nov: 37 °FDaily low, Dec: 28 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Daily high404555677685898781695544
Daily low232736465766706860483728

Monthly precipitation

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

0.02.04.0JanMarMayJulSepNovGranite City, Jan: 2.8 inGranite City, Feb: 2.5 inGranite City, Mar: 3.7 inGranite City, Apr: 4.6 inGranite City, May: 5.0 inGranite City, Jun: 4.2 inGranite City, Jul: 3.4 inGranite City, Aug: 2.9 inGranite City, Sep: 3.3 inGranite City, Oct: 3.4 inGranite City, Nov: 3.6 inGranite City, Dec: 2.6 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Granite City2.82.53.74.65.04.23.42.93.33.43.62.6

Monthly sunny days

Days each month with clear or partly cloudy skies.

01020JanMarMayJulSepNovGranite City, Jan: 14 daysGranite City, Feb: 12 daysGranite City, Mar: 15 daysGranite City, Apr: 15 daysGranite City, May: 16 daysGranite City, Jun: 17 daysGranite City, Jul: 21 daysGranite City, Aug: 22 daysGranite City, Sep: 21 daysGranite City, Oct: 19 daysGranite City, Nov: 16 daysGranite City, Dec: 14 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Granite City141215151617212221191614

Compare Granite City with another city

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

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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).