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 70 掳F on Thursday, while the low is 35 掳F on Tuesday. There is expected to be 1 sunny day and rain on 4 days this week.

There are currently no weather alerts.

Monday, April 6

- High of 55 掳F, low of 43 掳F (52% humidity)
- Sunny with a 0% chance of rain
- High risk of harm from sun exposure (6 UV index)
- Moderate breeze (15 mph wind)
- Sunrise at 6:31 AM, sunset at 7:24 PM
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1 / 6
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Tuesday, April 7

- High of 48 掳F, low of 35 掳F (52% humidity)
- Overcast with a 0% chance of rain
- High risk of harm from sun exposure (6 UV index)
- Moderate breeze (13 mph wind)
- Sunrise at 6:30 AM, sunset at 7:25 PM
2 / 6
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Wednesday, April 8

- High of 64 掳F, low of 39 掳F (53% humidity)
- Overcast with a 0% chance of rain
- High risk of harm from sun exposure (5 UV index)
- Moderate breeze (17 mph wind)
- Sunrise at 6:28 AM, sunset at 7:26 PM
3 / 6
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Thursday, April 9

- High of 70 掳F, low of 53 掳F (55% humidity)
- Mostly cloudy with a 20% chance of rain (0 mm of rain)
- Moderate risk of harm from sun exposure (3 UV index)
- Moderate breeze (16 mph wind)
- Sunrise at 6:27 AM, sunset at 7:27 PM
4 / 6
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Friday, April 10

- High of 63 掳F, low of 57 掳F (91% humidity)
- Overcast with a 89% chance of rain (1 mm of rain)
- Moderate breeze (13 mph wind)
- Sunrise at 6:25 AM, sunset at 7:28 PM
- Last quarter moon
5 / 6
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Saturday, April 11

- High of 66 掳F, low of 59 掳F (90% humidity)
- Overcast with a 100% chance of rain (36 mm of rain)
- Gentle breeze (9 mph wind)
- Sunrise at 6:23 AM, sunset at 7:29 PM
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6 / 6
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Sunday, April 12

- High of 70 掳F, low of 61 掳F (77% humidity)
- Overcast with a 100% chance of rain (2 mm of rain)
- Fresh breeze (22 mph wind)
- Sunrise at 6:22 AM, sunset at 7:30 PM

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