Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

67°F

19°C

Humidity 96%
Wind Speed Calm
Barometer 29.96 in
Dewpoint 66°F (19°C)
Visibility 7.00 mi
Last update 25 Jun 3:15 am CDT
Extended Forecast for

Gillespie IL

Flood Watch June 25, 01:00pm until June 26, 07:00am
Click here for hazard details and duration
Flood Watch
  • Overnight

    Overnight: A 40 percent chance of showers and thunderstorms, mainly before 5am.  Mostly cloudy, with a low around 64. Calm wind.

    Low: 64 °F

    Chance
    T-storms

  • Thursday

    Thursday: A 40 percent chance of showers and thunderstorms, mainly after 2pm.  Mostly cloudy, with a high near 83. Light and variable wind.

    High: 83 °F

    Chance
    T-storms

  • Thursday Night

    Thursday Night: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 3am.  Low around 65. Calm wind becoming east around 5 mph after midnight.  Chance of precipitation is 90%.

    Low: 65 °F

    Chance
    T-storms then
    T-storms

  • Friday

    Friday: Showers and thunderstorms before 3pm, then showers likely and possibly a thunderstorm between 3pm and 4pm, then a chance of showers and thunderstorms after 4pm. Some of the storms could produce heavy rainfall.  High near 78. Southeast wind 7 to 9 mph becoming south in the afternoon.  Chance of precipitation is 90%.

    High: 78 °F

    Heavy Rain

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 7pm.  Mostly cloudy, with a low around 66. Southwest wind 5 to 7 mph becoming calm  in the evening.  Chance of precipitation is 60%.

    Low: 66 °F

    Showers
    Likely

  • Saturday

    Saturday: A 50 percent chance of showers and thunderstorms.  Mostly cloudy, with a high near 84.

    High: 84 °F

    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 40 percent chance of showers and thunderstorms, mainly before 1am.  Partly cloudy, with a low around 70.

    Low: 70 °F

    Chance
    T-storms

  • Sunday

    Sunday: Sunny, with a high near 92.

    High: 92 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 73.

    Low: 73 °F

    Mostly Clear

Detailed Forecast

Overnight
A 40 percent chance of showers and thunderstorms, mainly before 5am. Mostly cloudy, with a low around 64. Calm wind.
Thursday
A 40 percent chance of showers and thunderstorms, mainly after 2pm. Mostly cloudy, with a high near 83. Light and variable wind.
Thursday Night
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 3am. Low around 65. Calm wind becoming east around 5 mph after midnight. Chance of precipitation is 90%.
Friday
Showers and thunderstorms before 3pm, then showers likely and possibly a thunderstorm between 3pm and 4pm, then a chance of showers and thunderstorms after 4pm. Some of the storms could produce heavy rainfall. High near 78. Southeast wind 7 to 9 mph becoming south in the afternoon. Chance of precipitation is 90%.
Friday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 7pm. Mostly cloudy, with a low around 66. Southwest wind 5 to 7 mph becoming calm in the evening. Chance of precipitation is 60%.
Saturday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 84.
Saturday Night
A 40 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 70.
Sunday
Sunny, with a high near 92.
Sunday Night
Mostly clear, with a low around 73.
Monday
Sunny, with a high near 94.
Monday Night
Clear, with a low around 74.
Tuesday
Sunny, with a high near 95.
Tuesday Night
Mostly clear, with a low around 74.
Wednesday
Sunny, with a high near 95.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Gillespie IL
 39.12°N 89.81°W (Elev. 653 ft)
1:51 am CDT Jun 25, 2026
3am CDT Jun 25, 2026-6pm CDT Jul 1, 2026
 
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