Weather Alert
Decatur Weather Warning NWS WEATHER ALERT FOR THE DECATUR, IL AREA - Issued: 1147 AM CDT Wed Aug 19 2026 Decatur Weather Warning

World > North America > United States > Illinois > Decatur   Decatur, Illinois Weather City of Decatur, Illinois

Decatur, IL Weather - Hour by Hour Forecast

Feedback E-mail the Weather

Quick Clicks

Decatur, IL Weather - Hour by Hour Forecast

24 Hour Forecast

Current Conditions - Mostly Cloudy. Temperature is 81°F27°C, dew point 71°F22°C, humidity 71%. Wind direction is SW at 6 mph10 km/h with visibility of 10 mi16 km. Barometric pressure is 29.94 in1013 mb.
Today - Partly sunny early, then mostly cloudy with showers likely with a chance of thunderstorms. Some thunderstorms May produce heavy ra.. Full Forecast
Tonight - Mostly cloudy. Showers likely with a chance of thunderstorms in the evening, then a slight chance of showers and thunderstorms aft.. Full Forecast

Decatur Hourly Weather

24 Hour Forecast Scroll
Wed, Aug 19
1:00 pm
Wed, Aug 19
2:00 pm
Wed, Aug 19
3:00 pm
Wed, Aug 19
4:00 pm
Wed, Aug 19
5:00 pm
Wed, Aug 19
6:00 pm
Wed, Aug 19
7:00 pm
Wed, Aug 19
8:00 pm
Wed, Aug 19
9:00 pm
Wed, Aug 19
10:00 pm
Wed, Aug 19
11:00 pm
Thu, Aug 20
Midnight
Thu, Aug 20
1:00 am
Thu, Aug 20
2:00 am
Thu, Aug 20
3:00 am
Thu, Aug 20
4:00 am
Thu, Aug 20
5:00 am
Thu, Aug 20
6:00 am
Thu, Aug 20
7:00 am
Thu, Aug 20
8:00 am
Thu, Aug 20
9:00 am
Thu, Aug 20
10:00 am
Thu, Aug 20
11:00 am
Thu, Aug 20
Noon
Decatur, IL Hourly Weather - Mostly Cloudy - 1:00 PM Decatur, IL Hourly Weather - Mostly Cloudy - 2:00 PM Decatur, IL Hourly Weather - Cloudy - 3:00 PM Decatur, IL Hourly Weather - Cloudy - 4:00 PM Decatur, IL Hourly Weather - Cloudy - 5:00 PM Decatur, IL Hourly Weather - Cloudy - 6:00 PM Decatur, IL Hourly Weather - Cloudy - 7:00 PM Decatur, IL Hourly Weather - Cloudy - 8:00 PM Decatur, IL Hourly Weather - Cloudy - 9:00 PM Decatur, IL Hourly Weather - Cloudy - 10:00 PM Decatur, IL Hourly Weather - Cloudy - 11:00 PM Decatur, IL Hourly Weather - Cloudy - 12:00 AM Decatur, IL Hourly Weather - Cloudy - 1:00 AM Decatur, IL Hourly Weather - Cloudy - 2:00 AM Decatur, IL Hourly Weather - Mostly Cloudy - 3:00 AM Decatur, IL Hourly Weather - Mostly Cloudy - 4:00 AM Decatur, IL Hourly Weather - Mostly Cloudy - 5:00 AM Decatur, IL Hourly Weather - Mostly Clear - 6:00 AM Decatur, IL Hourly Weather - Mostly Clear - 7:00 AM Decatur, IL Hourly Weather - Mostly Clear - 8:00 AM Decatur, IL Hourly Weather - Partly Cloudy - 9:00 AM Decatur, IL Hourly Weather - Partly Cloudy - 10:00 AM Decatur, IL Hourly Weather - Partly Cloudy - 11:00 AM Decatur, IL Hourly Weather - Mostly Cloudy - 12:00 PM
Mostly Cloudy Mostly Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Mostly Cloudy Mostly Cloudy Mostly Cloudy Mostly Clear Mostly Clear Mostly Clear Partly Cloudy Partly Cloudy Partly Cloudy Mostly Cloudy
82°F28°C 82°F28°C 83°F28°C 83°F28°C 81°F27°C 80°F27°C 78°F26°C 76°F24°C 75°F24°C 73°F23°C 72°F22°C 71°F22°C 70°F21°C 69°F21°C 68°F20°C 67°F19°C 67°F19°C 66°F19°C 66°F19°C 69°F21°C 71°F22°C 74°F23°C 76°F24°C 78°F26°C
Rain Rain Rain Rain Rain Rain Rain Rain Rain Rain Rain Rain Rain Rain Rain Rain Rain Rain Rain - - - - -
44% 44% 44% 44% 44% 44% 44% 59% 59% 59% 59% 59% 59% 23% 23% 23% 23% 23% 23% 4% 4% 4% 4% 4%
70°F21°C 70°F21°C 70°F21°C 70°F21°C 70°F21°C 70°F21°C 70°F21°C 70°F21°C 69°F21°C 69°F21°C 68°F20°C 68°F20°C 67°F19°C 66°F19°C 66°F19°C 65°F18°C 65°F18°C 64°F18°C 64°F18°C 64°F18°C 65°F18°C 65°F18°C 65°F18°C 64°F18°C
67% 67% 65% 65% 69% 72% 77% 82% 82% 87% 87% 90% 90% 90% 93% 93% 93% 93% 93% 84% 81% 74% 69% 62%
SW SSW SSW SSW W NW NW SW SE NE NNE NNE N NNE NNE NE NE NE NE NE NE NE NE NE
5 mph 5 mph 5 mph 5 mph 5 mph 3 mph 3 mph 3 mph 3 mph 3 mph 3 mph 3 mph 3 mph 3 mph 4 mph 4 mph 4 mph 5 mph 5 mph 5 mph 7 mph 7 mph 7 mph 8 mph
10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 6 mi10 km 3 mi5 km .75 mi1 km 3 mi5 km 3 mi5 km 5 mi8 km 5 mi8 km 5 mi8 km 5 mi8 km 6 mi10 km 6 mi10 km 10 mi16 km 10 mi16 km 10 mi16 km
Hour (CDT)
Weather
Clouds
Temperature
Precip. Type
POP
Dewpoint
Humidity
Wind Direction
Wind Speed
Visibility
POP = Probability of Precipitation. ** Indicates missing data/values from KDEC model statistics.

Trending Headlines

Trending Entertainment Headlines

Decatur Radar Loop

Use the map search tool if you want to place a location marker on the radar map...
Prob Precip % = Probability of Precipitation.

Decatur 36 Hour Forecast

POP = Probability of Precipitation. ** Indicates missing data/values from model statistics.

E-mail the Decatur Weather Forecast

Voice your opinion or tell us about page issues...

Decatur IL Weather - 2:11 pm

What are people saying?

Contact Us