ClimateForecastNovemberDecember >>

Collinsville (IL) Climate by Month

The climate in Collinsville is marked by big temperature swings throughout the year. Temperatures range from very warm during the warmest months to cold in the cooler months. It also has a relatively rain/snowy climate with high levels of precipitation. Let’s explore the climate details in depth to provide you with a complete overview.

Average day and night temperature

In Collinsville, temperatures differ significantly between summer and winter months. On average, daytime temperatures range from a very warm 31°C in July to a chilly 5°C in January. Nighttime temperatures can drop, with averages reaching -5°C in January.

The mean minimum and maximum temperatures throughout the year

Precipitation and rainy days

Collinsville experiences significant rain/snowfall throughout the year, averaging 1148 mm of precipitation annually. The seasons in Collinsville, bring significant changes in precipitation. The wettest month, June, receives high rainfall, with an average of 138 mm of precipitation. This rainfall is distributed across 12 rainy days. In contrast, the driest month, January, experiences much less snow/rainfall, totaling 53 mm over 8 snowy/rainy days. These distinct seasonal differences provide diverse experiences throughout the year.

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

Sunshine over the year

In Collinsville, summer days are longer and more sunny, with daily sunshine hours peaking at 10.4 hours in July. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 4.3 hours.

Monthly hours of sunshine

Data from: St. Louis, the United States of America (19 KM, 11 Miles).

Daily hours of sunshine

Data from: St. Louis, the United States of America (19 KM, 11 Miles).

The best time of year to visit Collinsville 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 Collinsville?
    July has an average maximum temperature of 31°C and is the warmest month of the year.
  • Which is the coldest month in Collinsville?
    The coldest month is January with an average maximum temperature of 5°C.
  • Which is the wettest month in Collinsville?
    June tops the wettest month list with 138 mm of rainfall.
  • Which is the driest month in Collinsville?
    January is the driest month with 53 mm of precipitation.
  • Which is the sunniest month in Collinsville?
    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 Collinsville (IL)

    Sat   Nov 23
    9°C | 2°C
    S 7 km/h
    almost clear and no rain

    almost clear and no rain

    Sun   Nov 24
    18°C | 4°C
    S 22 km/h
    partly cloudy and no rain

    partly cloudy and no rain

    Mon   Nov 25
    15°C | 2°C
    NW 25 km/h
    2 mm
    broken clouds and rain

    broken clouds and rain