ClimateForecastNovemberDecember >>

Caseyville (IL) Climate by Month

The temperature in Caseyville can vary greatly throughout the year. The temperatures shift from very warm to cold. It also has a notably wet climate with much precipitation. Now, let’s break down all the climate details for a clearer picture.

Average day and night temperature

Depending on the time of the year, temperatures range from very warm to chilly in Caseyville. Average daytime temperatures range from a very warm 31°C in July, the warmest time of the year, to a chilly 5°C during cooler months like January. At night, temperatures typically average around -5°C during these months.

The mean minimum and maximum temperatures throughout the year

Precipitation and rainy days

Caseyville has a relatively rain/snowy climate with high precipitation levels, averaging 1144 mm of rain/snowfall annually. Significant seasonal changes in precipitation occur throughout the year. During the wetter season, June receives high rainfall, averaging 138 mm of precipitation, recorded across 12 rainy days. In contrast, the drier season, January brings less snow/rainfall, with 54 mm over 7 snowy/rainy days.

The mean monthly precipitation over the year, including rain, hail and snow

Sunshine over the year

Seasonal changes in sunshine hours are quite dramatic in Caseyville. While July receives considerable daily sunshine with up to 10.4 hours, December marks the darkest time of the year, where sunshine is scarce with only 4.3 hours of sunlight per day.

Monthly hours of sunshine

Data from: St. Louis, the United States of America (14 KM, 9 Miles).

Daily hours of sunshine

Data from: St. Louis, the United States of America (14 KM, 9 Miles).

The best time of year to visit Caseyville in the United States of America

During the months of April, May and October you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.

Other facts from our historical weather data:
  • Which is the warmest month in Caseyville?
    July has an average maximum temperature of 31°C and is the warmest month of the year.
  • Which is the coldest month in Caseyville?
    The coldest month is January with an average maximum temperature of 5°C.
  • Which is the wettest month in Caseyville?
    June tops the wettest month list with 138 mm of rainfall.
  • Which is the driest month in Caseyville?
    January is the driest month with 54 mm of precipitation.
  • Which is the sunniest month in Caseyville?
    July is the sunniest month with an average of 311 hours of sunshine.

  • No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.

    Forecast for Caseyville (IL)

    Sat   Nov 23
    10°C | 2°C
    SW 11 km/h
    almost clear and no rain

    almost clear and no rain

    Sun   Nov 24
    18°C | 5°C
    S 18 km/h
    partly cloudy and no rain

    partly cloudy and no rain

    Mon   Nov 25
    14°C | 2°C
    NW 22 km/h
    2.1 mm
    broken clouds and rain

    broken clouds and rain