Decatur, Illinois 7-day weather forecast

Written by:
January 26, 2026
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Decatur, Illinois 7-day weather forecast

Stacker created the forecast for Decatur, Illinois using data from OpenWeather. This week's high is 73 °F on Friday, while the low is 30 °F on Monday. There are expected to be 0 sunny days and rain on 7 days this week.

NWS Lincoln IL has issued a special weather statement until Monday at 08:00 AM.

Monday, March 2

- High of 38 °F, low of 30 °F (89% humidity)
- Overcast with a 100% chance of rain (1 mm of rain)
- Moderate risk of harm from sun exposure (3 UV index)
- Gentle breeze (12 mph wind)
- Sunrise at 6:27 AM, sunset at 5:48 PM
1 / 6
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Tuesday, March 3

- High of 48 °F, low of 34 °F (99% humidity)
- Overcast with a 100% chance of rain (7 mm of rain)
- Light breeze (7 mph wind)
- Sunrise at 6:26 AM, sunset at 5:49 PM
- Full moon
2 / 6
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Wednesday, March 4

- High of 60 °F, low of 47 °F (100% humidity)
- Overcast with a 100% chance of rain (32 mm of rain)
- Gentle breeze (12 mph wind)
- Sunrise at 6:24 AM, sunset at 5:50 PM
3 / 6
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Thursday, March 5

- High of 58 °F, low of 53 °F (83% humidity)
- Overcast with a 100% chance of rain (6 mm of rain)
- Moderate risk of harm from sun exposure (4 UV index)
- Moderate breeze (16 mph wind)
- Sunrise at 6:23 AM, sunset at 5:51 PM
4 / 6
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Friday, March 6

- High of 73 °F, low of 50 °F (87% humidity)
- Overcast with a 100% chance of rain (3 mm of rain)
- Moderate risk of harm from sun exposure (5 UV index)
- Fresh breeze (19 mph wind)
- Sunrise at 6:21 AM, sunset at 5:52 PM
5 / 6
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Saturday, March 7

- High of 68 °F, low of 58 °F (64% humidity)
- Overcast with a 100% chance of rain (21 mm of rain)
- Moderate risk of harm from sun exposure (5 UV index)
- Fresh breeze (19 mph wind)
- Sunrise at 6:20 AM, sunset at 5:53 PM
6 / 6
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Sunday, March 8

- High of 53 °F, low of 48 °F (67% humidity)
- Overcast with a 100% chance of rain (3 mm of rain)
- Moderate risk of harm from sun exposure (5 UV index)
- Gentle breeze (9 mph wind)
- Sunrise at 6:18 AM, sunset at 5:54 PM

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