What is today's weather forecast for Monticello, IL?

Today's forecast for Monticello shows a high of 17 degrees and a low of 1 degrees Fahrenheit. Sunny, with a high near 17.

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

The 7-day forecast for Monticello shows highs from 17 to 36 degrees and lows from 1 to 25 degrees Fahrenheit. Expect precipitation on 4 days with chances of 20% or higher.

Will it rain in Monticello, IL this week?

Yes, rain is possible in Monticello this week. Precipitation chances: Saturday (40% chance), Sunday (50% chance), Tuesday (50% chance), Wednesday (50% chance).

How accurate is the Monticello weather forecast?

WeatherForYou provides highly accurate Monticello 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.

Monticello, IL Weather Forecast and Current Conditions

Current Conditions From Nearby Station

Switch to Metric Units

17°F
Feels Like 12°F

Humidity 73% Dew Point 10°F Wind NNW 3 MPH Gusts 8 Barometer 30.42 in.

Solar Rad 127 w/m²

Report from a personal weather station 13.5 mi. ENE of central Monticello
at 3:25 PM Thu, Dec 4, 2025

Point Forecast at a Glance

ThuDec 4

FriDec 5

SatDec 6

SunDec 7

50%

MonDec 8

TueDec 9

WedDec 10

50%

7-Day Temperature Trend

Week Ahead Summary

Warming trend through the week with high temperatures climbing from 17°F to 36°F. Unsettled weather expected with snow likely on at least 4 days.

Climate Context

This week's forecast shows temperatures running 10°F below the historical average for December. Normal highs for this period are around 39°F with lows around 23°F.

This Date in Weather History

1972 - Winds gusting to 70 mph sent the temperature at Livingston, MT, plunging from 52 degrees to 18 degrees in just twenty minutes.

Monticello, IL 7 Day Weather Forecast Details

Thursday Dec 4

Day: Sunny, with a high near 17. Wind chill values between 4 and 10. North northeast wind around 5 mph.

Night: Patchy freezing fog after 9pm. Partly cloudy, with a low around 1. Wind chill values between -1 and -6. Light and variable wind becoming south around 6 mph after midnight.

Friday Dec 5

Day: Patchy freezing fog before 9am. Mostly sunny, with a high near 29. Wind chill values between -3 and 7. South wind 6 to 10 mph, with gusts as high as 17 mph.

Night: Increasing clouds, with a low around 22. South southwest wind 7 to 10 mph becoming west after midnight.

Saturday Dec 6

Day: Mostly cloudy, with a high near 31. West wind 5 to 7 mph becoming northeast in the afternoon.

Night: A 40 percent chance of snow after midnight. Mostly cloudy, with a low around 21. East wind 5 to 7 mph.

Sunday Dec 7

Day: A 50 percent chance of snow before noon. Mostly cloudy, with a high near 29. East wind 8 to 13 mph becoming north in the afternoon. Winds could gust as high as 18 mph.

Night: Mostly cloudy, with a low around 6.

Monday Dec 8

Day: Mostly sunny, with a high near 24.

Night: Mostly cloudy, with a low around 14.

Tuesday Dec 9

Day: Mostly cloudy, with a high near 34.

Night: A chance of snow. Mostly cloudy, with a low around 25.

Wednesday Dec 10

Day: A chance of rain. Mostly cloudy, with a high near 36.

About Monticello, IL

Monticello ( MON-tiss-EL-oh) is a city in and the county seat of Piatt County, Illinois, United States. The population was 5,941 at the 2020 census.

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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