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

70°F

21°C

Humidity 99%
Wind Speed Calm
Barometer 29.92 in
Dewpoint 70°F (21°C)
Visibility 0.25 mi
Last update 28 Jun 4:55 am CDT
Extended Forecast for

Jewett IL

Heat Advisory June 29, 11:00am until July 3, 12:00am
Heat Advisory June 28, 01:00pm until June 28, 07:00pm
Dense Fog Advisory until June 28, 08:00am
Click here for hazard details and duration
Heat Advisory
Heat Advisory
Dense Fog Advisory
  •  
    Dense Fog Advisory until June 28, 08:00am

    NOW until 8:00am Sun

    Dense Fog Advisory

  • Overnight

    Low: 71 °F

    Areas Dense
    Fog

  • Sunday

    Sunday: Areas of dense fog before 9am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 89. Heat index values as high as 102. Calm wind becoming south around 6 mph in the morning.

    High: 89 °F

    Areas Dense
    Fog then
    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 73. South wind around 6 mph.

    Low: 73 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 93. Heat index values as high as 107. South southwest wind 5 to 10 mph, with gusts as high as 18 mph.

    High: 93 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 74. South southwest wind 5 to 9 mph, with gusts as high as 16 mph.

    Low: 74 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 93. South southwest wind 5 to 9 mph, with gusts as high as 15 mph.

    High: 93 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 74. South southwest wind 3 to 7 mph.

    Low: 74 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 93.

    High: 93 °F

    Sunny

Detailed Forecast

Overnight
Areas of dense fog. Otherwise, mostly cloudy, with a low around 71. Calm wind.
Sunday
Areas of dense fog before 9am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 89. Heat index values as high as 102. Calm wind becoming south around 6 mph in the morning.
Sunday Night
Mostly clear, with a low around 73. South wind around 6 mph.
Monday
Mostly sunny, with a high near 93. Heat index values as high as 107. South southwest wind 5 to 10 mph, with gusts as high as 18 mph.
Monday Night
Mostly clear, with a low around 74. South southwest wind 5 to 9 mph, with gusts as high as 16 mph.
Tuesday
Sunny, with a high near 93. South southwest wind 5 to 9 mph, with gusts as high as 15 mph.
Tuesday Night
Clear, with a low around 74. South southwest wind 3 to 7 mph.
Wednesday
Sunny, with a high near 93.
Wednesday Night
Mostly clear, with a low around 74.
Thursday
Sunny, with a high near 93.
Thursday Night
Mostly clear, with a low around 74.
Friday
A chance of showers and thunderstorms. Sunny, with a high near 91.
Friday Night
Partly cloudy, with a low around 73.
Independence Day
Sunny, with a high near 90.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Jewett IL
 39.22°N 88.23°W (Elev. 551 ft)
Last Update:
4:56 am CDT Jun 28, 2026
Forecast Valid:
5am CDT Jun 28, 2026-6pm CDT Jul 4, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation