What is today's weather forecast for Lake Decatur, IL?

Today's forecast for Lake Decatur shows a high of 74 degrees and a low of 57 degrees Fahrenheit. Sunny, with a high near 74.

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

The 7-day forecast for Lake Decatur shows highs from 52 to 74 degrees and lows from 30 to 57 degrees Fahrenheit. Expect precipitation on 4 days with chances of 20% or higher.

Will it rain in Lake Decatur, IL this week?

Yes, rain is possible in Lake Decatur this week. Precipitation chances: Monday (70% chance), Tuesday (30% chance), Wednesday (50% chance), Thursday (50% chance).

How accurate is the Lake Decatur weather forecast?

WeatherForYou provides highly accurate Lake Decatur 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.

Lake Decatur, IL Weather Forecast and Current Conditions

Current Conditions From Nearby Local Station

Switch to Metric Units

75°F
Feels Like 75°F

Humidity 51% Dew Point 56°F Wind WSW 9 MPH Barometer 29.94 in.760.5 mm

Solar Rad 373 w/m² Visibility 10 mi.

Report from a NOAA weather station 2.3 miles ESE of central Lake Decatur
at 1:54 PM Fri, Nov 14, 2025

Point Forecast at a Glance

FriNov 14

SatNov 15

SunNov 16

MonNov 17

TueNov 18

30%

WedNov 19

ThuNov 20

50%

7-Day Temperature Trend

Week Ahead Summary

High temperatures drop from 74°F to a low of 52°F, then recover to 60°F by week's end. Unsettled weather expected with rain likely on at least 4 days.

Climate Context

This week's forecast shows temperatures running 8°F above the historical average for November. Normal highs for this period are around 52°F with lows around 33°F.

This Date in Weather History

1974 - A storm produced 15 inches of snow at the Buffalo, NY, airport, and 30 inches on the south shore of Lake Erie.

Lake Decatur, IL 7 Day Weather Forecast Details

Friday Nov 14

Day: Sunny, with a high near 74. South southwest wind 9 to 13 mph, with gusts as high as 18 mph.

Night: Increasing clouds, with a low around 57. Southwest wind 9 to 13 mph, with gusts as high as 22 mph.

Saturday Nov 15

Day: Mostly cloudy, then gradually becoming sunny, with a high near 73. Southwest wind 11 to 17 mph becoming west northwest in the afternoon. Winds could gust as high as 28 mph.

Night: Mostly clear, with a low around 37. North northwest wind 9 to 11 mph, with gusts as high as 18 mph.

Sunday Nov 16

Day: Sunny, with a high near 54. Northwest wind 7 to 10 mph.

Night: Mostly clear, with a low around 30. Northwest wind around 6 mph becoming light and variable in the evening.

Monday Nov 17

Day: Mostly sunny, with a high near 55. Light and variable wind becoming east southeast 5 to 10 mph in the morning.

Night: Rain likely. Mostly cloudy, with a low around 38. Chance of precipitation is 70%.

Tuesday Nov 18

Day: A 30 percent chance of rain before noon. Partly sunny, with a high near 52.

Night: Mostly cloudy, with a low around 35.

Wednesday Nov 19

Day: Partly sunny, with a high near 54.

Night: A chance of rain. Mostly cloudy, with a low around 41.

Thursday Nov 20

Day: Rain likely. Mostly cloudy, with a high near 60.

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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