Best year time to visit Granite City

General weather information about Granite City

Average annual temperature is 14.8 °C

Absolute maximum temperature: 37.3 °C

Absolute minimum temperature: -11.0 °C

Number of sunny days: 198 days

Number of rainy days: 163 days

Number of snow days: 4 days

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* Weather data for Granite City United States is based on climate observations for 2026 year

Granite City air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)20.520.722.828.332.234.637.237.333.130.226.818.0
Average daytime temperature (°C)8.311.412.920.626.030.132.029.927.420.614.310.2
Average temperature (°C)3.75.37.014.019.723.926.425.021.915.68.75.9
Average night temperature (°C)0.41.02.68.414.418.421.721.017.311.54.42.9
Absolute minimum temperature (°C)-11.0-10.2-6.41.16.612.718.014.511.4-1.2-4.7-5.3

Granite City monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)10.011.012.013.014.014.014.014.013.011.010.09.0
Daylight mean duration (h)9.810.812.013.214.314.814.613.612.411.210.19.5
Daylight minimum duration (h)9.010.011.012.013.014.014.013.011.010.09.09.0
Sunshine mean duration (h)5.17.56.810.210.812.612.010.010.47.97.75.5
Precipitation (mm)7653194691601267414539621890
Sunny days161413191718101220182417
Rainy days13131711141221191013614
Snow days211000000000

Granite City - weather forecast by months

Granite City weather in januaryGranite City weather in februaryGranite City weather in marchGranite City weather in aprilGranite City weather in mayGranite City weather in juneGranite City weather in julyGranite City weather in augustGranite City weather in septemberGranite City weather in octoberGranite City weather in novemberGranite City weather in december

Best time to visit Granite City:

The best time to visit Granite City during the most sunny months:

  • June — 12.6(h)
  • July — 12.0(h)

The largest precipitation sum in Granite City is at

  • March — 194(mm)
  • May — 160(mm)
  • June — 126(mm)
  • August — 145(mm)

    • Weather forecast in the closest to Granite City admin centers

    Weather forecast in the closest towns to Granite City

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    Frequently asked questions

    When is the best time to visit Granite City?
    The historical weather data above shows the warmest, sunniest and driest months to help you choose the best time to visit Granite City.
    What is the weather like in Granite City?
    See average temperature, rainfall and daylight hours for Granite City by month in the table above.
    How many sunny days does Granite City have?
    The monthly weather statistics above show sunshine and rainfall patterns for Granite City throughout the year.