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

Sparta Community-Hunter Field Airport (KSAR)

Lat: 38.15°NLon: 89.7°WElev: 528ft.

Overcast

34°F

1°C

Humidity 41%
Wind Speed SE 7 mph
Barometer 30.21 in
Dewpoint 12°F (-11°C)
Visibility 10.00 mi
Wind Chill28°F (-2°C)
Last update 17 Mar 9:15 pm CDT
Extended Forecast for

Marissa IL

  • Tonight

    Tonight: A 20 percent chance of snow before 10pm. Cloudy, with a low around 31. South wind 6 to 14 mph, with gusts as high as 26 mph.

    Low: 31 °F

    Slight Chance
    Snow then
    Cloudy

  • Wednesday

    Wednesday: Mostly cloudy through mid morning, then gradual clearing, with a high near 63. South wind 9 to 15 mph becoming west in the afternoon. Winds could gust as high as 25 mph.

    High: 63 °F

    Becoming
    Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 45. Light and variable wind becoming south around 6 mph in the evening.

    Low: 45 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Mostly cloudy through mid morning, then gradual clearing, with a high near 72. South wind around 7 mph becoming west in the afternoon.

    High: 72 °F

    Becoming
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 44. North wind 3 to 5 mph.

    Low: 44 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 71.

    High: 71 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 49.

    Low: 49 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 56.

    Low: 56 °F

    Clear

Detailed Forecast

Tonight
A 20 percent chance of snow before 10pm. Cloudy, with a low around 31. South wind 6 to 14 mph, with gusts as high as 26 mph.
Wednesday
Mostly cloudy through mid morning, then gradual clearing, with a high near 63. South wind 9 to 15 mph becoming west in the afternoon. Winds could gust as high as 25 mph.
Wednesday Night
Increasing clouds, with a low around 45. Light and variable wind becoming south around 6 mph in the evening.
Thursday
Mostly cloudy through mid morning, then gradual clearing, with a high near 72. South wind around 7 mph becoming west in the afternoon.
Thursday Night
Mostly clear, with a low around 44. North wind 3 to 5 mph.
Friday
Mostly sunny, with a high near 71.
Friday Night
Partly cloudy, with a low around 49.
Saturday
Sunny, with a high near 78.
Saturday Night
Clear, with a low around 56.
Sunday
Mostly sunny, with a high near 79.
Sunday Night
Partly cloudy, with a low around 41.
Monday
Mostly sunny, with a high near 55.
Monday Night
Mostly cloudy, with a low around 37.
Tuesday
Mostly sunny, with a high near 57.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Marissa IL
 38.25°N 89.74°W (Elev. 459 ft)
Last Update:
9:21 pm CDT Mar 17, 2026
Forecast Valid:
9pm CDT Mar 17, 2026-6pm CDT Mar 24, 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