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

Today's forecast for Rochester shows a high of 18 degrees and a low of 0 degrees Fahrenheit. Sunny, with a high near 18.

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

The 7-day forecast for Rochester shows highs from 18 to 38 degrees and lows from 0 to 27 degrees Fahrenheit. Expect precipitation on 2 days with chances of 20% or higher.

Will it rain in Rochester, IL this week?

Yes, rain is possible in Rochester this week. Precipitation chances: Saturday (30% chance), Wednesday (50% chance).

How accurate is the Rochester weather forecast?

WeatherForYou provides highly accurate Rochester 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.

Rochester, IL Weather Forecast and Current Conditions

Current Conditions From Nearby Local Station

Switch to Metric Units

23°F
Feels Like 21°F

Humidity 51% Dew Point 7°F Wind ESE 2 MPH Gusts 3 Barometer 30.38 in.

Solar Rad 290 w/m² UV Index 2

Report from a personal weather station 4.8 mi. WNW of central Rochester
at 12:42 PM Thu, Dec 4, 2025

Point Forecast at a Glance

ThuDec 4

FriDec 5

SatDec 6

SunDec 7

MonDec 8

TueDec 9

WedDec 10

50%

7-Day Temperature Trend

Week Ahead Summary

High temperatures climb from 18°F to a high of 38°F by week's end. Some precipitation possible, including both rain and snow.

Climate Context

This week's forecast shows temperatures running 10°F below the historical average for December. Normal highs for this period are around 40°F with lows around 24°F.

This Date in Weather History

1982 - The temperature in New York City's Central Park reached 72 degrees to establish a record high for December. The month as a whole was also the warmest of record.

Rochester, IL 7 Day Weather Forecast Details

Thursday Dec 4

Day: Sunny, with a high near 18. Wind chill values between 4 and 11. North northeast wind 3 to 6 mph.

Night: Patchy freezing fog after 1am. Mostly clear, with a low around 0. Wind chill values between -3 and -8. Light and variable wind becoming east around 5 mph after midnight.

Friday Dec 5

Day: Partly sunny through mid morning, then becoming sunny, with a high near 32. Wind chill values between -4 and 6. South wind 6 to 9 mph, with gusts as high as 15 mph.

Night: Mostly cloudy, with a low around 23. South wind 5 to 8 mph becoming west after midnight.

Saturday Dec 6

Day: Mostly cloudy, with a high near 33. West wind around 5 mph becoming light and variable.

Night: A 30 percent chance of snow after midnight. Cloudy, with a low around 21. Northeast wind 5 to 7 mph.

Sunday Dec 7

Day: Mostly cloudy, with a high near 28. North northeast wind 7 to 11 mph, with gusts as high as 15 mph.

Night: Mostly cloudy, with a low around 9.

Monday Dec 8

Day: Mostly sunny, with a high near 26.

Night: Mostly cloudy, with a low around 16.

Tuesday Dec 9

Day: Partly sunny, with a high near 37.

Night: Mostly cloudy, with a low around 27.

Wednesday Dec 10

Day: A chance of rain. Mostly cloudy, with a high near 38.

About Rochester, IL

Rochester is a village and suburb of Springfield in Sangamon County, Illinois, United States. The population was 3,689 at the 2010 census, and 3,713 at a 2018 estimate. The village was settled in 1819, and is located in Rochester Township. Rochester is part of the Springfield, Illinois Metropolitan Statistical Area.

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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