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 Saturday, while the low is 54 掳F on Wednesday. There are expected to be 2 sunny days and rain on 4 days this week.

There are currently no weather alerts.

Monday, June 1

- High of 84 掳F, low of 63 掳F (56% humidity)
- Mostly sunny with a 90% chance of rain (2 mm of rain)
- Very high risk of harm from sun exposure (9 UV index)
- Moderate breeze (13 mph wind)
- Sunrise at 5:29 AM, sunset at 8:17 PM
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1 / 6
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Tuesday, June 2

- High of 74 掳F, low of 60 掳F (46% humidity)
- Sunny with a 0% chance of rain
- Very high risk of harm from sun exposure (9 UV index)
- Moderate breeze (14 mph wind)
- Sunrise at 5:29 AM, sunset at 8:18 PM
2 / 6
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Wednesday, June 3

- High of 77 掳F, low of 54 掳F (47% humidity)
- Partly cloudy with a 0% chance of rain
- Very high risk of harm from sun exposure (9 UV index)
- Gentle breeze (12 mph wind)
- Sunrise at 5:28 AM, sunset at 8:19 PM
3 / 6
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Thursday, June 4

- High of 80 掳F, low of 59 掳F (50% humidity)
- Partly sunny with a 0% chance of rain
- Very high risk of harm from sun exposure (9 UV index)
- Gentle breeze (11 mph wind)
- Sunrise at 5:28 AM, sunset at 8:20 PM
4 / 6
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Friday, June 5

- High of 81 掳F, low of 62 掳F (50% humidity)
- Overcast with a 100% chance of rain (1 mm of rain)
- Moderate breeze (13 mph wind)
- Sunrise at 5:28 AM, sunset at 8:20 PM
5 / 6
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Saturday, June 6

- High of 86 掳F, low of 68 掳F (64% humidity)
- Overcast with a 100% chance of rain (11 mm of rain)
- Moderate breeze (17 mph wind)
- Sunrise at 5:28 AM, sunset at 8:21 PM
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6 / 6
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Sunday, June 7

- High of 80 掳F, low of 68 掳F (60% humidity)
- Mostly cloudy with a 100% chance of rain (0 mm of rain)
- Gentle breeze (10 mph wind)
- Sunrise at 5:27 AM, sunset at 8:21 PM

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