What is today's weather forecast for Mount Vernon, IL?

Today's forecast for Mount Vernon shows a low of 30 degrees Fahrenheit. Mostly cloudy, with a low around 30.

What is the 7-day weather forecast for Mount Vernon, IL?

The 7-day forecast for Mount Vernon shows highs from 14 to 58 degrees and lows from 4 to 46 degrees Fahrenheit. Expect precipitation on 3 days with chances of 20% or higher.

Will it rain in Mount Vernon, IL this week?

Yes, rain is possible in Mount Vernon this week. Precipitation chances: Saturday (20% chance), Wednesday (50% chance), Thursday (50% chance).

How accurate is the Mount Vernon weather forecast?

WeatherForYou provides highly accurate Mount Vernon forecasts using National Weather Service data and current conditions from the nearest available weather stations, often miles closer than regional airports, for the most precise local forecasts.

Mount Vernon, IL Weather Forecast and Current Conditions

Current Conditions From Nearby Local Station

Switch to Metric Units

32°F
Feels Like 28°F

Humidity 93% Dew Point 30°F Wind E 4 MPH Gusts 6 Barometer 31.28 in.

Report from a MADIS/MESONET weather station 2.1 mi. NW of central Mount Vernon
at 1:17 AM Fri, Dec 12, 2025

Point Forecast at a Glance

ThuDec 11

FriDec 12

SatDec 13

20%

SunDec 14

MonDec 15

TueDec 16

WedDec 17

Jump to detailed forecast ↓

7-Day Temperature Trend

Week Ahead Summary

High temperatures dip from 39°F to a low of 14°F mid-week, then warm to 54°F. Some precipitation possible, including both rain and snow.

Climate Context

This week's forecast shows temperatures running 5°F below the historical average for December. Normal highs for this period are around 44°F with lows around 26°F.

This Date in Weather History

1932 - Very cold weather prevailed along the West Coast. San Francisco received 0.8 inch of snow, and at the airport the temperature dipped to 20 degrees. At Sacramento CA, the mercury dipped to 17 degrees to establish an all-time record low for that location. Morning lows were below freezing from the 9th to the 15th at Sacramento, and the high on the 11th was just 34 degrees. The cold wave dealt severe damage to truck crops and orange groves in the Sacramento Valley.

Mount Vernon, IL 7 Day Weather Forecast Details

Thursday Dec 11

Night: Mostly cloudy, with a low around 30. East northeast wind 6 to 8 mph, with gusts as high as 20 mph.

Friday Dec 12

Day: Mostly cloudy, with a high near 39. East northeast wind 6 to 8 mph becoming north northwest in the afternoon. Winds could gust as high as 20 mph.

Night: Mostly cloudy, with a low around 25. North northwest wind around 5 mph becoming calm in the evening.

Saturday Dec 13

Day: A 20 percent chance of snow showers after noon. Mostly cloudy, with a high near 31. Light and variable wind becoming north 5 to 9 mph in the morning.

Night: Mostly cloudy, with a low around 4. North northwest wind 9 to 11 mph, with gusts as high as 21 mph.

Sunday Dec 14

Day: Sunny, with a high near 14. North northwest wind 5 to 10 mph, with gusts as high as 20 mph.

Night: Mostly clear, with a low around 4. Calm wind.

Monday Dec 15

Day: Sunny, with a high near 34. Light south wind becoming south southwest 5 to 10 mph in the morning.

Night: Partly cloudy, with a low around 22. South southwest wind around 6 mph.

Tuesday Dec 16

Day: Mostly sunny, with a high near 46. South southwest wind 5 to 10 mph.

Night: Mostly cloudy, with a low around 36. South southwest wind around 8 mph.

Wednesday Dec 17

Day: Partly sunny, with a high near 54. South southwest wind 8 to 11 mph, with gusts as high as 18 mph.

Night: A chance of showers. Mostly cloudy, with a low around 46. South southwest wind 10 to 13 mph, with gusts as high as 22 mph.

Thursday Dec 18

Day: A chance of showers. Partly sunny, with a high near 58. South southwest wind 8 to 13 mph becoming west northwest in the afternoon. Winds could gust as high as 22 mph.

About Mount Vernon, IL

Mount Vernon is a city in Jefferson County, Illinois, United States, and its county seat. The population was 14,600 at the 2020 census. Mount Vernon is the principal city of the Mount Vernon, Illinois micropolitan area, which includes all of Jefferson and Hamilton counties.

Content from Wikipedia, licensed under CC BY-SA 3.0.

How We Provide Better Local Weather

Current conditions: We use the nearest available station to your location - including professional MESONET/MADIS and local weather stations - often miles closer than regional airports.

Forecasts: National Weather Service point forecasts predict for your specific area, not broad regional zones, making them far more relevant to your location.

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