National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Effingham, Effingham County Memorial Airport (K1H2)

Lat: 39.07°NLon: 88.53°WElev: 587ft.

Fog/Mist

72°F

22°C

Humidity 100%
Wind Speed Calm
Barometer 29.94 in
Dewpoint 72°F (22°C)
Visibility 5.00 mi
Last update 27 Jun 1:15 am CDT
Extended Forecast for

Altamont IL

Flood Watch June 27, 01:33am until June 27, 01:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch June 27, 01:33am until June 27, 01:00pm

    NOW until 1:00pm Sat

    Flood Watch

  • Overnight

    Low: 68 °F

    Chance
    Showers and
    Patchy Fog

  • Saturday

    Saturday: A slight chance of showers, then a chance of showers and thunderstorms after noon. Areas of fog before 8am. Otherwise, mostly cloudy, with a high near 82. Light and variable wind. Chance of precipitation is 30%.

    High: 82 °F

    Slight Chance
    Showers and
    Areas Fog
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: A 40 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 69. Calm wind.

    Low: 69 °F

    Chance
    Showers then
    Chance
    T-storms

  • Sunday

    Sunday: Mostly sunny, with a high near 90. Heat index values as high as 102. Light south southeast wind becoming south 5 to 9 mph in the morning. Winds could gust as high as 15 mph.

    High: 90 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 72. South wind 6 to 8 mph.

    Low: 72 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 93. South wind 6 to 10 mph, with gusts as high as 16 mph.

    High: 93 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 73. South wind 5 to 9 mph, with gusts as high as 15 mph.

    Low: 73 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 93.

    High: 93 °F

    Sunny

Detailed Forecast

Overnight
A chance of showers and thunderstorms before 4am, then a slight chance of showers. Patchy fog. Otherwise, cloudy, with a low around 68. Light southeast wind. Chance of precipitation is 30%.
Saturday
A slight chance of showers, then a chance of showers and thunderstorms after noon. Areas of fog before 8am. Otherwise, mostly cloudy, with a high near 82. Light and variable wind. Chance of precipitation is 30%.
Saturday Night
A 40 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 69. Calm wind.
Sunday
Mostly sunny, with a high near 90. Heat index values as high as 102. Light south southeast wind becoming south 5 to 9 mph in the morning. Winds could gust as high as 15 mph.
Sunday Night
Mostly clear, with a low around 72. South wind 6 to 8 mph.
Monday
Sunny, with a high near 93. South wind 6 to 10 mph, with gusts as high as 16 mph.
Monday Night
Mostly clear, with a low around 73. South wind 5 to 9 mph, with gusts as high as 15 mph.
Tuesday
Sunny, with a high near 93.
Tuesday Night
Clear, with a low around 73.
Wednesday
Sunny, with a high near 94.
Wednesday Night
Mostly clear, with a low around 74.
Thursday
Sunny, with a high near 92.
Thursday Night
Mostly clear, with a low around 73.
Friday
A chance of showers and thunderstorms. Sunny, with a high near 91.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Altamont IL
 39.06°N 88.76°W (Elev. 636 ft)
Last Update:
1:26 am CDT Jun 27, 2026
Forecast Valid:
1am CDT Jun 27, 2026-6pm CDT Jul 3, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation