NWS St. Louis Announces Changes To May 16, 2025 Tornado Damage Assessment

After a year-long review of new ground survey data and aerial imagery, NWS St. Louis made several adjustments to the May 16, 2025 tornado damage assessment. Read More >

Hazardous Weather Conditions

Flood Watch until June 9, 07:00 AM CDT

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89° N Lon: 90.03° W Elev: 518 ft.

Overcast

76°F

24°C

Humidity	88%
Wind Speed	S 6 mph
Barometer	29.98 in
Dewpoint	72°F (22°C)
Visibility	10.00 mi
Heat Index	76°F (24°C)
Last update	9 Jun 3:15 am CDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Detailed forecast for

Macoupin County

Rest Of Tonight

Mostly cloudy with a slight chance of showers and thunderstorms. Some thunderstorms may produce heavy rainfall. Near steady temperature around 70. Southwest winds around 5 mph. Chance of rain 20 percent.

Tuesday

Mostly sunny. A chance of showers with a slight chance of thunderstorms in the morning, then a slight chance of showers and thunderstorms in the afternoon. Some thunderstorms may produce heavy rainfall in the morning. Humid with highs in the upper 80s. Southwest winds 5 to 10 mph. Chance of rain 40 percent. Heat index values up to 103 in the afternoon.

Tuesday Night

Mostly clear. Humid with lows in the lower 70s. Southwest winds 5 to 10 mph. Heat index values up to 103 early in the evening.

Wednesday

Sunny. Highs in the lower 90s. Southwest winds 10 to 15 mph with gusts up to 25 mph. Heat index values up to 101.

Wednesday Night

Partly cloudy with a chance of showers. A chance of thunderstorms, mainly in the evening. Lows in the lower 70s. South winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 50 percent.

Thursday

Mostly sunny. A chance of showers with a slight chance of thunderstorms in the morning, then showers likely with a chance of thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 60 percent. Heat index values up to 100.

Thursday Night

Showers likely with a chance of thunderstorms in the evening, then mostly cloudy with a slight chance of showers and thunderstorms after midnight. Lows in the mid 60s. Chance of rain 70 percent.

Friday

Sunny. Highs in the mid 80s.

Friday Night

Mostly clear. A slight chance of showers after midnight. Lows in the lower 60s. Chance of rain 20 percent.

Saturday

Mostly sunny with a slight chance of showers and thunderstorms. Highs in the mid 80s. Chance of rain 20 percent.

Saturday Night

Partly cloudy with a chance of showers and thunderstorms. Lows in the lower 60s. Chance of rain 50 percent.

Sunday

Mostly sunny with a chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. Highs in the lower 80s. Chance of rain 40 percent.

Sunday Night

Partly cloudy with a 30 percent chance of showers. Lows around 60.

Monday

Partly sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the upper 70s. Chance of rain 20 percent.