What is today's weather forecast for Mason City, IL?

Today's forecast for Mason City 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 Mason City, IL?

The 7-day forecast for Mason City shows highs from 17 to 37 degrees and lows from -1 to 26 degrees Fahrenheit. Expect precipitation on 4 days with chances of 20% or higher.

Will it rain in Mason City, IL this week?

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

How accurate is the Mason City weather forecast?

WeatherForYou provides highly accurate Mason City 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.

Mason City, IL Weather Forecast and Current Conditions

Current Conditions From Nearby Station

Switch to Metric Units

16°F
Feels Like 13°F

Humidity 63% Dew Point 6°F Wind NNW 2 MPH Gusts 6 Barometer 29.69 in.

Solar Rad 262 w/m²

Report from a MADIS/MESONET weather station 6.5 mi. ESE of central Mason City
at 2:30 PM Thu, Dec 4, 2025

Point Forecast at a Glance

ThuDec 4

-1

FriDec 5

SatDec 6

SunDec 7

40%

MonDec 8

TueDec 9

WedDec 10

50%

7-Day Temperature Trend

Week Ahead Summary

High temperatures climb from 17°F to a high of 37°F by week's end. Unsettled weather expected with snow likely on at least 4 days.

Climate Context

This week's forecast shows temperatures running 11°F below the historical average for December. Normal highs for this period are around 40°F with lows around 23°F.

This Date in Weather History

1786 - The first of two great early December storms began. The storm produced 18 inches of snow at Morristown NJ, and twenty inches of snow at New Haven CT. It also resulted in high tides at Nantucket which did great damage.

Mason City, IL 7 Day Weather Forecast Details

Thursday Dec 4

Day: Sunny, with a high near 17. Calm wind.

Night: Patchy freezing fog after 9pm. Mostly clear, with a low around -1. Wind chill values between -3 and -8. Calm wind becoming south around 6 mph after midnight.

Friday Dec 5

Day: Patchy freezing fog before 9am. Sunny, with a high near 32. Wind chill values between -4 and 6. South wind 6 to 9 mph, with gusts as high as 17 mph.

Night: Mostly cloudy, with a low around 23. South wind around 6 mph becoming west northwest after midnight. Winds could gust as high as 15 mph.

Saturday Dec 6

Day: Mostly cloudy, with a high near 31. West northwest wind around 5 mph becoming calm in the morning.

Night: A 50 percent chance of snow after midnight. Cloudy, with a low around 22. Calm wind becoming east around 6 mph after midnight. Winds could gust as high as 15 mph.

Sunday Dec 7

Day: A 40 percent chance of snow before noon. Mostly cloudy, with a high near 28. East wind 6 to 10 mph becoming north in the afternoon. Winds could gust as high as 18 mph.

Night: Mostly cloudy, with a low around 2.

Monday Dec 8

Day: Partly sunny, with a high near 25.

Night: Mostly cloudy, with a low around 16.

Tuesday Dec 9

Day: Partly sunny, with a high near 34.

Night: A chance of rain and snow. Mostly cloudy, with a low around 26.

Wednesday Dec 10

Day: A chance of rain. Mostly cloudy, with a high near 37.

About Mason City, IL

Mason City is a city in Mason County, Illinois, United States. The population was 2,077 at the 2020 census, down from 2,343 in 2010.

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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