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

Today's forecast for Grafton shows a low of 8 degrees Fahrenheit. Mostly clear, with a low around 8.

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

The 7-day forecast for Grafton shows highs from 29 to 44 degrees and lows from 8 to 32 degrees Fahrenheit. Expect precipitation on 3 days with chances of 20% or higher.

Will it rain in Grafton, IL this week?

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

How accurate is the Grafton weather forecast?

WeatherForYou provides highly accurate Grafton 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.

Grafton, IL Weather Forecast and Current Conditions

Current Conditions From Nearby Local Station

Switch to Metric Units

21°F
Feels Like 12°F

Humidity 52% Dew Point 6°F Wind NNE 7 MPH Barometer 30.33 in.

Solar Rad 234 w/m² Visibility 10 mi.

Report from a NOAA weather station 2.5 mi. S of central Grafton
at 2:54 PM Thu, Dec 4, 2025

Point Forecast at a Glance

ThuDec 4

FriDec 5

SatDec 6

SunDec 7

30%

MonDec 8

TueDec 9

WedDec 10

30%

7-Day Temperature Trend

Week Ahead Summary

Variable high temperatures through the week, ranging from 29°F to 44°F. Some precipitation possible with wintry mix on at least one day.

Climate Context

This week's forecast shows temperatures running 7°F below the historical average for December. Normal highs for this period are around 43°F with lows around 26°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.

Grafton, IL 7 Day Weather Forecast Details

Thursday Dec 4

Night: Mostly clear, with a low around 8. Northeast wind around 5 mph becoming calm in the evening.

Friday Dec 5

Day: Sunny, with a high near 36. South wind 3 to 8 mph.

Night: Mostly cloudy, with a low around 26. South wind around 6 mph becoming west after midnight.

Saturday Dec 6

Day: Partly sunny, with a high near 35. Light and variable wind becoming east around 6 mph in the afternoon.

Night: A 30 percent chance of snow after midnight. Mostly cloudy, with a low around 28. East wind around 6 mph.

Sunday Dec 7

Day: A chance of rain and snow before noon, then a slight chance of snow. Mostly cloudy, with a high near 33. Chance of precipitation is 30%.

Night: Mostly cloudy, with a low around 14.

Monday Dec 8

Day: Mostly sunny, with a high near 29.

Night: Partly cloudy, with a low around 23.

Tuesday Dec 9

Day: Mostly sunny, with a high near 42.

Night: Mostly cloudy, with a low around 32.

Wednesday Dec 10

Day: A 30 percent chance of rain. Mostly cloudy, with a high near 44.

Night: Mostly cloudy, with a low around 22.

Thursday Dec 11

Day: Partly sunny, with a high near 33.

About Grafton, IL

Grafton is the oldest city in Jersey County, Illinois, United States. It is located near the confluence of the Illinois and Mississippi Rivers. As of the 2020 census, the city had a total population of 626. Grafton is a part of the Metro-East region and Greater St. Louis.

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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