Hazardous Weather Conditions
Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Partly Cloudy and Breezy
80°F
27°C
| Humidity | 60% |
| Wind Speed | S 24 G 33 mph |
| Barometer | 29.82 in (1009.2 mb) |
| Dewpoint | 65°F (18°C) |
| Visibility | 10.00 mi |
| Heat Index | 82°F (28°C) |
| Last update | 17 Apr 2:54 pm CDT |
Extended Forecast for
2 Miles ENE Harristown IL
Flood Watch April 17, 06:00pm until April 18, 04:00am
This Afternoon

High: 83 °F
Slight Chance
T-storms and
BreezyTonight

Low: 46 °F
Showers
Saturday
High: 55 °F
Breezy.
Chance
Showers then
SunnySaturday Night

Low: 36 °F
Mostly Clear
then Patchy
FrostSunday

High: 60 °F
Patchy Frost
then Mostly
SunnySunday Night

Low: 36 °F
Mostly Clear
then Patchy
FrostMonday

High: 61 °F
Patchy Frost
then SunnyMonday Night

Low: 49 °F
Mostly Clear
Tuesday
High: 77 °F
Mostly Sunny
then Mostly
Sunny and
Breezy
Detailed Forecast
This Afternoon
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 83. Breezy, with a south wind around 22 mph, with gusts as high as 32 mph.
Tonight
Showers and thunderstorms. Low around 46. South wind around 18 mph becoming west southwest in the evening. Winds could gust as high as 31 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Saturday
A 30 percent chance of showers, mainly before 8am. Mostly cloudy, then gradually becoming sunny, with a high near 55. Breezy, with a northwest wind 18 to 21 mph, with gusts as high as 29 mph.
Saturday Night
Patchy frost after 2am. Otherwise, mostly clear, with a low around 36. Northwest wind 7 to 16 mph becoming west southwest after midnight. Winds could gust as high as 24 mph.
Sunday
Patchy frost before 9am. Otherwise, sunny, with a high near 60. Southwest wind 7 to 12 mph becoming west 13 to 18 mph in the afternoon. Winds could gust as high as 28 mph.
Sunday Night
Patchy frost after 2am. Otherwise, mostly clear, with a low around 36. North northwest wind 6 to 11 mph becoming northeast after midnight. Winds could gust as high as 18 mph.
Monday
Patchy frost before 9am. Otherwise, sunny, with a high near 61. East wind 6 to 9 mph becoming south in the afternoon.
Monday Night
Mostly clear, with a low around 49.
Tuesday
Mostly sunny, with a high near 77. Breezy.
Tuesday Night
Partly cloudy, with a low around 55.
Wednesday
Sunny, with a high near 80.
Wednesday Night
Mostly clear, with a low around 58.
Thursday
Mostly sunny, with a high near 81.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
2 Miles ENE Harristown IL
39.84°N 89.03°W (Elev. 666 ft)
39.84°N 89.03°W (Elev. 666 ft)
1:46 pm CDT Apr 17, 2026
3pm CDT Apr 17, 2026-6pm CDT Apr 23, 2026



