Hazardous Weather Conditions
Current conditions at
Southern Illinois Airport (KMDH)
Lat: 37.78°NLon: 89.25°WElev: 400ft.
Overcast
77°F
25°C
| Humidity | 88% |
| Wind Speed | NW 7 mph |
| Barometer | 30.03 in (1016.3 mb) |
| Dewpoint | 73°F (23°C) |
| Visibility | 10.00 mi |
| Heat Index | 78°F (26°C) |
| Last update | 14 Oct 11:52 am CDT |
Extended Forecast for
Jacob IL
This Afternoon
High: 82 °F
Showers
Tonight
Low: 66 °F
Chance
Showers then
Chance
T-stormsThursday
High: 87 °F
Chance
Showers then
Slight Chance
T-stormsThursday Night
Low: 51 °F
Chance
ShowersFriday
High: 62 °F
Partly Sunny
and BreezyFriday Night
Low: 40 °F
Partly Cloudy
Saturday
High: 63 °F
Sunny
Saturday Night
Low: 37 °F
Clear
Sunday
High: 70 °F
Sunny
Detailed Forecast
This Afternoon
Showers and thunderstorms, mainly before 4pm. High near 82. North northwest wind 3 to 5 mph. Chance of precipitation is 80%.
Tonight
A chance of showers, with thunderstorms also possible after 1am. Mostly cloudy, with a low around 66. Calm wind. Chance of precipitation is 40%.
Thursday
A chance of showers and thunderstorms before 1pm, then a slight chance of showers and thunderstorms after 4pm. Cloudy through mid morning, then gradual clearing, with a high near 87. Light and variable wind becoming south southwest 6 to 11 mph in the morning. Winds could gust as high as 18 mph. Chance of precipitation is 50%.
Thursday Night
A chance of showers and thunderstorms before 1am, then a chance of showers between 1am and 4am. Increasing clouds, with a low around 51. Southwest wind 6 to 15 mph becoming northwest after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 40%.
Friday
Partly sunny, with a high near 62. Breezy, with a northwest wind 16 to 21 mph, with gusts as high as 29 mph.
Friday Night
Partly cloudy, with a low around 40. North wind 9 to 15 mph, with gusts as high as 22 mph.
Saturday
Sunny, with a high near 63. North wind 6 to 9 mph.
Saturday Night
Clear, with a low around 37. Calm wind.
Sunday
Sunny, with a high near 70. Calm wind becoming south southeast around 5 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 44. Calm wind.
Monday
Mostly sunny, with a high near 72. Calm wind becoming south around 6 mph in the afternoon.
Monday Night
Partly cloudy, with a low around 48. Calm wind.
Tuesday
Sunny, with a high near 77. Light and variable wind.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast AreaABOUT THIS FORECAST
Point Forecast:
Jacob IL
37.75°N 89.54°W
37.75°N 89.54°W
12:46 pm CDT Oct 14, 2026
1pm CDT Oct 14, 2026-6pm CDT Oct 20, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
