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

Robinson Municipal Airport (KRSV)

Lat: 39.01°NLon: 87.65°WElev: 449ft.

Fair with Haze

75°F

24°C

Humidity 78%
Wind Speed NW 6 mph
Barometer 29.99 in
Dewpoint 68°F (20°C)
Visibility 7.00 mi
Last update 17 Aug 7:35 pm CDT
Extended Forecast for

West Union IL

  • Tonight

    Tonight: Partly cloudy, with a low around 61. North northwest wind 5 to 8 mph becoming calm in the evening.

    Low: 61 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 82. Light and variable wind.

    High: 82 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 66. Light south wind.

    Low: 66 °F

    Partly Cloudy
    then Chance
    Showers

  • Wednesday

    Wednesday: Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 81. South southwest wind 3 to 5 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 81 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 64. Northeast wind 3 to 5 mph. Chance of precipitation is 60%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 64 °F

    Showers
    Likely

  • Thursday

    Thursday: Mostly sunny, with a high near 81. Northeast wind 5 to 7 mph.

    High: 81 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 61. North northeast wind around 5 mph becoming calm in the evening.

    Low: 61 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 63.

    Low: 63 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 61. North northwest wind 5 to 8 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 82. Light and variable wind.
Tuesday Night
A 30 percent chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 66. Light south wind.
Wednesday
Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 81. South southwest wind 3 to 5 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 64. Northeast wind 3 to 5 mph. Chance of precipitation is 60%. New precipitation amounts between a half and three quarters of an inch possible.
Thursday
Mostly sunny, with a high near 81. Northeast wind 5 to 7 mph.
Thursday Night
Mostly clear, with a low around 61. North northeast wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 81.
Friday Night
Mostly clear, with a low around 63.
Saturday
Mostly sunny, with a high near 81.
Saturday Night
Mostly clear, with a low around 61.
Sunday
Sunny, with a high near 78.
Sunday Night
Partly cloudy, with a low around 59.
Monday
Partly sunny, with a high near 79.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
West Union IL
 39.22°N 87.66°W (Elev. 449 ft)
Last Update:
7:36 pm CDT Aug 17, 2026
Forecast Valid:
7pm CDT Aug 17, 2026-6pm CDT Aug 24, 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