Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Overcast
40°F
4°C
| Humidity | 86% |
| Wind Speed | E 10 mph |
| Barometer | 30.22 in (1024.0 mb) |
| Dewpoint | 36°F (2°C) |
| Visibility | 10.00 mi |
| Wind Chill | 34°F (1°C) |
| Last update | 2 Mar 4:54 pm CST |
Extended Forecast for
2 Miles ENE Harristown IL
Tonight
Low: 35 °F
Mostly Cloudy
then Chance
ShowersTuesday

High: 50 °F
Showers
Tuesday Night

Low: 43 °F
Showers and
Patchy FogWednesday

High: 59 °F
Showers and
Patchy FogWednesday Night

Low: 52 °F
Showers
Thursday
High: 65 °F
Showers then
Chance
ShowersThursday Night
Low: 50 °F
Partly Cloudy
then Chance
ShowersFriday

High: 75 °F
Showers
Likely and
BreezyFriday Night
Low: 58 °F
Chance
T-storms then
Showers
Detailed Forecast
Tonight
A 50 percent chance of showers, mainly after 5am. Mostly cloudy, with a low around 35. East wind around 7 mph.
Tuesday
Showers, with thunderstorms also possible after 3pm. High near 50. East southeast wind around 6 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday Night
Showers and possibly a thunderstorm. Patchy fog. Low around 43. East northeast wind 6 to 9 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Wednesday
Showers, with thunderstorms also possible after 3pm. Patchy fog before 7am. High near 59. East wind 6 to 9 mph becoming south southeast in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday Night
Showers and possibly a thunderstorm. Low around 52. South wind 6 to 10 mph, with gusts as high as 16 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Thursday
Showers, mainly before noon. High near 65. West southwest wind 8 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
A 40 percent chance of showers after midnight. Mostly cloudy, with a low around 50. West southwest wind 6 to 9 mph becoming south southeast after midnight. Winds could gust as high as 15 mph.
Friday
Showers likely, mainly before noon. Mostly cloudy, with a high near 75. Breezy. Chance of precipitation is 60%.
Friday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after midnight. Low around 58. Chance of precipitation is 80%.
Saturday
Showers likely, mainly before noon. Cloudy, with a high near 67. Chance of precipitation is 70%.
Saturday Night
Mostly cloudy, with a low around 45.
Sunday
Partly sunny, with a high near 62.
Sunday Night
Mostly cloudy, with a low around 47.
Monday
Mostly sunny, with a high near 68.
Additional Forecasts and Information
Basemap Options
Click map to change the forecast location
Loading map...
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)
4:41 pm CST Mar 2, 2026
5pm CST Mar 2, 2026-6pm CDT Mar 9, 2026


