Best year time to visit City of Alton

General weather information about City of Alton

Average annual temperature is 24.8 °C

Absolute maximum temperature: 42.8 °C

Absolute minimum temperature: 3.7 °C

Number of sunny days: 211 days

Number of rainy days: 154 days

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

City of Alton air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)31.535.336.934.935.142.839.740.840.437.632.427.7
Average daytime temperature (°C)25.825.730.428.531.237.837.638.237.631.123.723.0
Average temperature (°C)19.518.823.123.026.130.631.231.631.025.219.117.7
Average night temperature (°C)15.414.318.819.222.125.526.526.726.321.415.813.6
Absolute minimum temperature (°C)6.23.78.413.618.221.624.424.323.49.98.94.9

City of Alton monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)10.011.012.013.013.013.013.013.012.011.011.010.0
Daylight mean duration (h)10.711.312.012.813.413.813.613.012.311.510.910.5
Daylight minimum duration (h)10.010.011.012.013.013.013.012.011.011.010.010.0
Sunshine mean duration (h)7.78.88.28.810.212.612.311.911.08.45.86.8
Precipitation (mm)1262816779173939155010828
Sunny days22191711921231916151722
Rainy days9914192298121416139
Snow days000000000000

City of Alton - weather forecast by months

City of Alton weather in januaryCity of Alton weather in februaryCity of Alton weather in marchCity of Alton weather in aprilCity of Alton weather in mayCity of Alton weather in juneCity of Alton weather in julyCity of Alton weather in augustCity of Alton weather in septemberCity of Alton weather in octoberCity of Alton weather in novemberCity of Alton weather in december

Best time to visit City of Alton:

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

  • June — 12.6(h)
  • July — 12.3(h)
  • August — 11.9(h)

The largest precipitation sum in City of Alton is at

  • April — 167(mm)
  • May — 79(mm)
  • November — 108(mm)

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    Frequently asked questions

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