Best year time to visit Saint Charles

General weather information about Saint Charles

Average annual temperature is 13.3 °C

Absolute maximum temperature: 33.3 °C

Absolute minimum temperature: -8.1 °C

Number of sunny days: 172 days

Number of rainy days: 187 days

Number of snow days: 6 days

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* Weather data for Saint Charles United States is based on climate observations for 2026 year

Saint Charles air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)17.123.023.326.526.529.932.633.330.027.422.915.8
Average daytime temperature (°C)9.813.013.719.122.525.529.327.225.419.614.210.1
Average temperature (°C)4.77.27.612.616.319.623.322.019.513.97.95.1
Average night temperature (°C)1.22.92.87.111.314.818.718.014.99.33.41.6
Absolute minimum temperature (°C)-6.9-8.1-8.1-0.32.18.714.612.610.63.3-6.4-7.1

Saint Charles monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)10.011.012.013.014.014.014.014.012.011.010.09.0
Daylight mean duration (h)10.010.812.013.114.114.614.413.512.411.310.29.7
Daylight minimum duration (h)9.010.011.012.013.014.014.013.011.010.09.09.0
Sunshine mean duration (h)4.66.08.29.610.511.011.410.110.98.17.85.9
Precipitation (mm)13113311683116534818769334688
Sunny days10131717131261215202116
Rainy days18151313181825191511913
Snow days301000000002

Saint Charles - weather forecast by months

Saint Charles weather in januarySaint Charles weather in februarySaint Charles weather in marchSaint Charles weather in aprilSaint Charles weather in maySaint Charles weather in juneSaint Charles weather in julySaint Charles weather in augustSaint Charles weather in septemberSaint Charles weather in octoberSaint Charles weather in novemberSaint Charles weather in december

Best time to visit Saint Charles:

The best time to visit Saint Charles during the most sunny months:

  • June — 11.0(h)
  • July — 11.4(h)
  • September — 10.9(h)

The largest precipitation sum in Saint Charles is at

  • January — 131(mm)
  • February — 133(mm)
  • March — 116(mm)
  • May — 116(mm)
  • August — 187(mm)

    • Weather forecast in the closest to Saint Charles admin centers

    Weather forecast in the closest towns to Saint Charles

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    Frequently asked questions

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