Weather forecast for tomorrow
Decatur, IL

Weather forecast for tomorrow

Wednesday, Jun 18.

Scattered Thunderstorms / Wind
5:25 am

8:28 pm
CDT
Scattered Thunderstorms / Wind
81°F / 66°F
  • Wind: 24mph SW
  • Humidity: 80%
  • Precip. probability: 64%
  • Precipitation: 0.63"
  • UV index: 6
Tomorrow, on Wednesday, June 18, scattered thunderstorms are expected, accompanied by strong winds later in the day.
The likelihood of rain is high, and precipitation will be moderate. The temperature is forecasted to vary between a moderately hot 80.6°F and a breezy 66.2°F.
The maximum heat index, which calculates the temperature value influenced by the moisture in the air, is calculated to be a humid 86°F. Note that heat index values are valued for light wind and location in the shade.
The maximum temperature will align with June's usual high of 80.6°F.
Sunrise will be at 5:25 am and sunset at 8:28 pm; tomorrow's daylight will last for 15h and 3min.

Frequently asked questions

What is the weather forecast for Decatur for tomorrow?
Tomorrow, scattered thunderstorms are likely, with winds becoming gusty as the day progresses.
Will it rain tomorrow?
Moderate precipitation of 0.63" is anticipated. The chance of rainfall is 64%.
What will be the highest temperature tomorrow in Decatur?
Tomorrow, the highest temperature will be 80.6°F, while the lowest temperature will be 66.2°F. The maximum heat index, which integrates air moisture with ambient temperature, is calculated to be 86°F.
The highest temperature will be in line with the average maximum of 80.6°F in June. The lowest temperature will be also in line with the average low of 64°F.
When is the sunrise / sunset tomorrow?
On Wednesday, in Decatur, sunrise will be at 5:25 am and sunset at 8:28 pm (CDT).
How long will the day be tomorrow?
In Decatur, the length of the day tomorrow will be 15h and 3min.

Hourly weather forecast

12 am
  • 75°F
  • Feels like:
    75°F
Cloudy
Cloudy
  • Wind: 6mph SSW
  • Pressure: 29.8"Hg
  • Humidity: 84%
  • Precip. probability: 9%
  • Precipitation: 0"
  • Visibility: 10mi
2 am
  • 75°F
  • Feels like:
    79°F
Mostly Cloudy
Mostly Cloudy
  • Wind: 4mph SSW
  • Pressure: 29.8"Hg
  • Humidity: 84%
  • Precip. probability: 24%
  • Precipitation: 0"
  • Visibility: 9mi
4 am
  • 73°F
  • Feels like:
    77°F
Mostly Cloudy
Mostly Cloudy
  • Wind: 5mph S
  • Pressure: 29.77"Hg
  • Humidity: 88%
  • Precip. probability: 22%
  • Precipitation: 0"
  • Visibility: 8mi
Sunrise: 5:25 am
6 am
  • 73°F
  • Feels like:
    75°F
Isolated Thunderstorms
Isolated Thunderstorms
  • Wind: 6mph SSE
  • Pressure: 29.77"Hg
  • Humidity: 90%
  • Precip. probability: 31%
  • Precipitation: 0.04"
  • Visibility: 7mi
8 am
  • 75°F
  • Feels like:
    81°F
Scattered Thunderstorms
Scattered Thunderstorms
  • Wind: 9mph SSE
  • Pressure: 29.74"Hg
  • Humidity: 88%
  • Precip. probability: 41%
  • Precipitation: 0.12"
  • Visibility: 7mi
10 am
  • 79°F
  • Feels like:
    82°F
Scattered Thunderstorms
Scattered Thunderstorms
  • Wind: 19mph SSW
  • Pressure: 29.74"Hg
  • Humidity: 84%
  • Precip. probability: 49%
  • Precipitation: 0.12"
  • Visibility: 7mi
12 pm
  • 79°F
  • Feels like:
    82°F
Few Showers / Wind
Few Showers / Wind
  • Wind: 22mph SW
  • Pressure: 29.74"Hg
  • Humidity: 81%
  • Precip. probability: 32%
  • Precipitation: 0.04"
  • Visibility: 7mi
2 pm
  • 79°F
  • Feels like:
    82°F
Cloudy / Wind
Cloudy / Wind
  • Wind: 22mph SW
  • Pressure: 29.71"Hg
  • Humidity: 76%
  • Precip. probability: 16%
  • Precipitation: 0"
  • Visibility: 10mi
4 pm
  • 81°F
  • Feels like:
    84°F
Mostly Cloudy
Mostly Cloudy
  • Wind: 19mph SW
  • Pressure: 29.71"Hg
  • Humidity: 73%
  • Precip. probability: 23%
  • Precipitation: 0"
  • Visibility: 10mi
6 pm
  • 79°F
  • Feels like:
    82°F
Isolated Thunderstorms
Isolated Thunderstorms
  • Wind: 12mph WSW
  • Pressure: 29.71"Hg
  • Humidity: 74%
  • Precip. probability: 34%
  • Precipitation: 0.08"
  • Visibility: 7mi
8 pm
  • 77°F
  • Feels like:
    81°F
Isolated Thunderstorms
Isolated Thunderstorms
  • Wind: 9mph WSW
  • Pressure: 29.74"Hg
  • Humidity: 78%
  • Precip. probability: 33%
  • Precipitation: 0.04"
  • Visibility: 5mi
Sunset: 8:28 pm
10 pm
  • 72°F
  • Feels like:
    73°F
Showers
Showers
  • Wind: 7mph W
  • Pressure: 29.77"Hg
  • Humidity: 87%
  • Precip. probability: 57%
  • Precipitation: 0.08"
  • Visibility: 5mi
Tomorrow, a combination of overcast, storm-filled and rain-soaked weather is predicted.
Rain is forecasted from 6 am to 12 pm, and from 5 pm to 11 pm. With light precipitation of 0.12", the most intense rain will be falling at 8 am, 10 am and 7 pm.
The temperature will be between the lowest temperature of 71.6°F and the highest temperature of 80.6°F. The warmest part of the day is anticipated around 4 pm.
The highest temperature will be comparable to June's average maximum of 80.6°F. The night temperature will be also alike with the standard June low of 64°F.
Updated: Jun 17, 2025 @ 22:41:47 UTC
Published by: Weather U.S. | About Us
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