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

Hazardous Weather Conditions

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fog/Mist

72°F

22°C

Humidity 94%
Wind Speed N 7 mph
Barometer 29.96 in
Dewpoint 70°F (21°C)
Visibility 4.00 mi
Last update 14 Jun 9:50 am CDT
Extended Forecast for

Dorchester IL

  • Today

    Today: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 79. North wind 7 to 9 mph.

    High: 79 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: Patchy fog after 4am. Otherwise, partly cloudy, with a low around 64. North wind 3 to 8 mph.

    Low: 64 °F

    Partly Cloudy
    then Patchy
    Fog

  • Sunday

    Sunday: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 83. Northeast wind around 6 mph.

    High: 83 °F

    Patchy Fog
    then Mostly
    Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 67. Light and variable wind.

    Low: 67 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Monday

    Monday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 82. Southeast wind 3 to 6 mph. Chance of precipitation is 30%.

    High: 82 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 68.

    Low: 68 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 86.

    High: 86 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71.

    Low: 71 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 87. Chance of precipitation is 70%.

    High: 87 °F

    Chance
    Showers then
    Showers
    Likely

Detailed Forecast

Today
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 79. North wind 7 to 9 mph.
Tonight
Patchy fog after 4am. Otherwise, partly cloudy, with a low around 64. North wind 3 to 8 mph.
Sunday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 83. Northeast wind around 6 mph.
Sunday Night
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 67. Light and variable wind.
Monday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 82. Southeast wind 3 to 6 mph. Chance of precipitation is 30%.
Monday Night
A 20 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 68.
Tuesday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 86.
Tuesday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71.
Wednesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 87. Chance of precipitation is 70%.
Wednesday Night
A 50 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 69.
Juneteenth
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 85.
Thursday Night
Mostly clear, with a low around 67.
Friday
Sunny, with a high near 87.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Dorchester IL
 39.08°N 89.9°W (Elev. 659 ft)
Last Update:
9:22 am CDT Jun 14, 2025
Forecast Valid:
9am CDT Jun 14, 2025-6pm CDT Jun 20, 2025
 
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