Weather forecast for today
Decatur, IL

Weather forecast for today

Tuesday, Jun 17.

Partly Cloudy
5:25 am

8:28 pm
CDT
Partly Cloudy
88°F / 72°F
  • Wind: 7mph SSW
  • Humidity: 75%
  • Precip. probability: 4%
  • Precipitation: 0"
  • UV index: 9
On Tuesday, in Decatur, sun and clouds will share the sky, creating a partly cloudy day.
The temperature is forecasted to vary between a hot 87.8°F and a pleasant 71.6°F.
The maximum heat index, which measures the combined effect of heat and moisture, is computed to be a sizzling 102.2°F. Note that heat index values are valued for light wind and location in the shade. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
The temperature will be higher and more consistent with July's average high of 82°F than with June's usual.
Sunrise will be at 5:25 am and sunset at 8:28 pm; the daylight will last for 15h and 3min.

Current condition

Mostly Cloudy
5:08 am CDT
Mostly Cloudy
  • 70°F
  • Feels like: 70°F
  • Wind: 4mph SW
  • Humidity: 97%
  • Dewpoint: 68°F
  • Pressure: 29.85"Hg
  • Precipitation: 0"
  • Visibility: 4mi
  • UV index: 0
At the moment, in Decatur, the sky is mainly clouded, with limited clear patches.
The temperature is a pleasant 69.8°F. The current temperature is near the lowest predicted 71.6°F for today.

Weather radar - Decatur, IL

Doppler radar displays precipitation for the past 2h and forecasts the next 30min

Frequently asked questions

What is the temperature now?
At 5:08 am CDT, the temperature is 69.8°F.
What is the weather forecast for Decatur for today?
Today, sunlight and clouds will take turns dominating the sky.
What will be the highest temperature today?
Today, the highest temperature will be 87.8°F, while the lowest temperature will be 71.6°F. The maximum heat index, which reflects the perceived temperature due to humidity levels, is calculated to be 102.2°F.
The maximum temperature will be relatively higher than the average highest temperature of 80.6°F in June. The lowest temperature will be also a few degrees higher than the average low of 64°F.
When are sunrise and sunset today in Decatur?
On Tuesday, in Decatur, sunrise will be at 5:25 am and sunset at 8:28 pm (CDT).
How long is the day today?
In Decatur, the length of the day today will be 15h and 3min.

Hourly weather forecast

6 am
  • 70°F
  • Feels like:
    70°F
Mostly Cloudy
Mostly Cloudy
  • Wind: 4mph SSW
  • Pressure: 29.85"Hg
  • Humidity: 97%
  • Precip. probability: 4%
  • Precipitation: 0"
  • Visibility: 2mi
8 am
  • 73°F
  • Feels like:
    73°F
Mostly Cloudy
Mostly Cloudy
  • Wind: 6mph SSW
  • Pressure: 29.85"Hg
  • Humidity: 91%
  • Precip. probability: 3%
  • Precipitation: 0"
  • Visibility: 7mi
10 am
  • 77°F
  • Feels like:
    77°F
Partly Cloudy
Partly Cloudy
  • Wind: 6mph SSW
  • Pressure: 29.85"Hg
  • Humidity: 78%
  • Precip. probability: 2%
  • Precipitation: 0"
  • Visibility: 10mi
12 pm
  • 82°F
  • Feels like:
    88°F
Partly Cloudy
Partly Cloudy
  • Wind: 6mph SSW
  • Pressure: 29.83"Hg
  • Humidity: 67%
  • Precip. probability: 1%
  • Precipitation: 0"
  • Visibility: 10mi
2 pm
  • 86°F
  • Feels like:
    91°F
Partly Cloudy
Partly Cloudy
  • Wind: 5mph SSW
  • Pressure: 29.83"Hg
  • Humidity: 59%
  • Precip. probability: 2%
  • Precipitation: 0"
  • Visibility: 10mi
4 pm
  • 88°F
  • Feels like:
    93°F
Mostly Sunny
Mostly Sunny
  • Wind: 7mph S
  • Pressure: 29.77"Hg
  • Humidity: 55%
  • Precip. probability: 1%
  • Precipitation: 0"
  • Visibility: 10mi
6 pm
  • 86°F
  • Feels like:
    91°F
Mostly Sunny
Mostly Sunny
  • Wind: 7mph SSW
  • Pressure: 29.77"Hg
  • Humidity: 59%
  • Precip. probability: 4%
  • Precipitation: 0"
  • Visibility: 10mi
8 pm
  • 82°F
  • Feels like:
    88°F
Partly Cloudy
Partly Cloudy
  • Wind: 5mph SSW
  • Pressure: 29.77"Hg
  • Humidity: 67%
  • Precip. probability: 15%
  • Precipitation: 0"
  • Visibility: 10mi
Sunset: 8:28 pm
10 pm
  • 79°F
  • Feels like:
    84°F
Partly Cloudy
Partly Cloudy
  • Wind: 6mph S
  • Pressure: 29.77"Hg
  • Humidity: 76%
  • Precip. probability: 15%
  • Precipitation: 0"
  • Visibility: 10mi
Today, in Decatur, primarily gloomy and occasionally sunny weather is forecasted.
The temperature will vary between a maximum of 87.8°F and a minimum of 69.8°F. The hottest part of the day will be from 3 pm to 5 pm.
The maximum is expected to resemble July's average high of 82°F rather than June's. The minimum temperature will be also more close to July's average low of 65.7°F than June's typical 64°F.
Updated: Jun 17, 2025 @ 10:08:46 UTC
Published by: Weather U.S. | About Us
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Weather Forecasting & Climate

Decatur, Illinois, USA

  • en: Decatur, Illinois, USA
  • es: Decatur, Illinois, EE.UU.
  • hr: Dekejtur, Ilinois, SAD
  • sr: Dekejtur, Ilinois, SAD
  • zh: 迪凯特, 伊利诺伊, 美国
  • Latitude: 39.840315°
  • Longitude: -88.954800°
  • Elevation: 676 ft
  • Current time: 5:08am CDT
  • Sunrise: 5:25 am CDT
  • Sunset: 8:28 pm CDT
  • Timezone: America/Chicago
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