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Mount Vernon (IL) Climate by Month

The climate in Mount Vernon 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 Mount Vernon, temperatures differ significantly between summer and winter months. On average, daytime temperatures range from a very warm 31°C in July to a chilly 4°C in January. Nighttime temperatures can drop, with averages reaching -6°C in January.

The mean minimum and maximum temperatures throughout the year

Precipitation and rainy days

Mount Vernon experiences significant rain/snowfall throughout the year, averaging 1215 mm of precipitation annually. The seasons in Mount Vernon, bring significant changes in precipitation. The wettest month, April, receives high rainfall, with an average of 134 mm of precipitation. This rainfall is distributed across 11 rainy days. In contrast, the driest month, January, experiences much less snow/rainfall, totaling 59 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

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

Other facts from our historical weather data:
  • When is summer in Mount Vernon?
    The hottest season / summer takes place in June, July, August and September.
  • Which is the warmest month in Mount Vernon?
    July has an average maximum temperature of 31°C and is the warmest month of the year.
  • Which is the coldest month in Mount Vernon?
    The coldest month is January with an average maximum temperature of 4°C.
  • Which is the wettest month in Mount Vernon?
    April tops the wettest month list with 134 mm of rainfall.
  • Which is the driest month in Mount Vernon?
    January is the driest month with 59 mm of precipitation.

  • 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 Mount Vernon (IL)

    Sat   Nov 23
    9°C | 3°C
    SW 7 km/h
    partly cloudy and no rain

    partly cloudy and no rain

    Sun   Nov 24
    17°C | 3°C
    S 22 km/h
    partly cloudy and no rain

    partly cloudy and no rain

    Mon   Nov 25
    16°C | 2°C
    NW 14 km/h
    1.8 mm
    broken clouds and rain

    broken clouds and rain