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

63°F

17°C

Humidity 38%
Wind Speed S 5 mph
Barometer 30.00 in
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Last update 28 Feb 5:15 pm CST
Extended Forecast for

Marissa IL

  • This Afternoon

    This Afternoon: A 30 percent chance of rain and thunderstorms. Mostly cloudy, with a high near 65. South wind around 6 mph.

    High: 65 °F

    Chance Rain

  • Tonight

    Tonight: A slight chance of rain and thunderstorms before 7pm, then a slight chance of rain between 7pm and 9pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 33. South wind 5 to 13 mph becoming north in the evening. Winds could gust as high as 22 mph. Chance of precipitation is 20%.

    Low: 33 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Sunday

    Sunday: Increasing clouds, with a high near 47. Northeast wind 9 to 13 mph, with gusts as high as 21 mph.

    High: 47 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: Rain and snow likely, possibly mixed with sleet before 3am, then rain likely, possibly mixed with snow. Cloudy, with a low around 34. East wind 8 to 10 mph. Chance of precipitation is 70%. Little or no snow and sleet accumulation expected.

    Low: 34 °F

    Wintry Mix
    Likely

  • Monday

    Monday: Rain likely, mainly before noon. Cloudy, with a high near 45. East wind 7 to 10 mph. Chance of precipitation is 60%.

    High: 45 °F

    Rain Likely
    then Slight
    Chance Rain

  • Monday Night

    Monday Night: Rain likely. Cloudy, with a low around 41. Chance of precipitation is 70%.

    Low: 41 °F

    Rain Likely

  • Tuesday

    Tuesday: Rain likely, with thunderstorms also possible after noon. Cloudy, with a high near 66. Chance of precipitation is 70%.

    High: 66 °F

    Rain Likely

  • Tuesday Night

    Tuesday Night: Rain likely, with thunderstorms also possible after midnight. Cloudy, with a low around 56. Chance of precipitation is 70%.

    Low: 56 °F

    Rain Likely

  • Wednesday

    Wednesday: Rain and possibly a thunderstorm. High near 68. Chance of precipitation is 80%.

    High: 68 °F

    Rain

Detailed Forecast

This Afternoon
A 30 percent chance of rain and thunderstorms. Mostly cloudy, with a high near 65. South wind around 6 mph.
Tonight
A slight chance of rain and thunderstorms before 7pm, then a slight chance of rain between 7pm and 9pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 33. South wind 5 to 13 mph becoming north in the evening. Winds could gust as high as 22 mph. Chance of precipitation is 20%.
Sunday
Increasing clouds, with a high near 47. Northeast wind 9 to 13 mph, with gusts as high as 21 mph.
Sunday Night
Rain and snow likely, possibly mixed with sleet before 3am, then rain likely, possibly mixed with snow. Cloudy, with a low around 34. East wind 8 to 10 mph. Chance of precipitation is 70%. Little or no snow and sleet accumulation expected.
Monday
Rain likely, mainly before noon. Cloudy, with a high near 45. East wind 7 to 10 mph. Chance of precipitation is 60%.
Monday Night
Rain likely. Cloudy, with a low around 41. Chance of precipitation is 70%.
Tuesday
Rain likely, with thunderstorms also possible after noon. Cloudy, with a high near 66. Chance of precipitation is 70%.
Tuesday Night
Rain likely, with thunderstorms also possible after midnight. Cloudy, with a low around 56. Chance of precipitation is 70%.
Wednesday
Rain and possibly a thunderstorm. High near 68. Chance of precipitation is 80%.
Wednesday Night
Rain likely and possibly a thunderstorm. Mostly cloudy, with a low around 56. Chance of precipitation is 70%.
Thursday
Rain likely. Partly sunny, with a high near 71. Chance of precipitation is 70%.
Thursday Night
A 50 percent chance of rain and thunderstorms. Mostly cloudy, with a low around 58.
Friday
Rain likely and possibly a thunderstorm. Mostly cloudy, with a high near 72. Chance of precipitation is 70%.
Friday Night
Rain likely and possibly a thunderstorm. Mostly cloudy, with a low around 56. Chance of precipitation is 60%.
Saturday
Rain likely. Mostly cloudy, with a high near 66. Chance of precipitation is 70%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Marissa IL
 38.25°N 89.74°W (Elev. 459 ft)
Last Update:
4:36 pm CST Feb 28, 2026
Forecast Valid:
5pm CST Feb 28, 2026-6pm CST Mar 7, 2026
 
Forecast Discussion
 
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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