Decatur, Illinois 7-day weather forecast

Written by:
March 23, 2026
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Decatur, Illinois 7-day weather forecast

created the forecast for Decatur, Illinois using data from . This week's high is 86 掳F on Tuesday, while the low is 41 掳F on Sunday. There are expected to be 2 sunny days and rain on 6 days this week.

There are currently no weather alerts.

Monday, April 13

- High of 80 掳F, low of 65 掳F (80% humidity)
- Mostly cloudy with a 100% chance of rain (4 mm of rain)
- Very high risk of harm from sun exposure (7 UV index)
- Fresh breeze (20 mph wind)
- Sunrise at 6:20 AM, sunset at 7:31 PM
1 / 6
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Tuesday, April 14

- High of 86 掳F, low of 65 掳F (62% humidity)
- Overcast with a 80% chance of rain (1 mm of rain)
- High risk of harm from sun exposure (6 UV index)
- Fresh breeze (20 mph wind)
- Sunrise at 6:19 AM, sunset at 7:32 PM
2 / 6
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Wednesday, April 15

- High of 73 掳F, low of 66 掳F (71% humidity)
- Overcast with a 100% chance of rain (6 mm of rain)
- Moderate risk of harm from sun exposure (2 UV index)
- Fresh breeze (20 mph wind)
- Sunrise at 6:17 AM, sunset at 7:33 PM
3 / 6
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Thursday, April 16

- High of 78 掳F, low of 62 掳F (59% humidity)
- Mostly sunny with a 100% chance of rain (12 mm of rain)
- Very high risk of harm from sun exposure (7 UV index)
- Fresh breeze (19 mph wind)
- Sunrise at 6:16 AM, sunset at 7:34 PM
4 / 6
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Friday, April 17

- High of 78 掳F, low of 62 掳F (59% humidity)
- Overcast with a 100% chance of rain (3 mm of rain)
- Fresh breeze (19 mph wind)
- Sunrise at 6:14 AM, sunset at 7:35 PM
- New moon
5 / 6
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Saturday, April 18

- High of 70 掳F, low of 48 掳F (76% humidity)
- Overcast with a 100% chance of rain (4 mm of rain)
- Fresh breeze (20 mph wind)
- Sunrise at 6:13 AM, sunset at 7:36 PM
6 / 6
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Sunday, April 19

- High of 52 掳F, low of 41 掳F (42% humidity)
- Sunny with a 0% chance of rain
- Fresh breeze (19 mph wind)
- Sunrise at 6:12 AM, sunset at 7:37 PM

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