Areas of Dangerous Heat and Heavy Rain with Possible Flooding into this Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend with heat advisories in effect. Heavy to excessive rainfall occurring at times through Sunday could bring areas of flooding to parts of the upper Midwest, central Great Lakes, southern New England and Virginia/North Carolina tidewater region. Read More >

Hazardous Weather Conditions

Heat Advisory until September 18, 08:00 PM CDT

Current conditions at

St. Charles, St. Charles County Smartt Airport (KSET)

Lat: 38.93° N Lon: 90.43° W Elev: 436 ft.

Fair

80°F

27°C

Humidity	79%
Wind Speed	Calm
Barometer	30.13 in (1019.7 mb)
Dewpoint	73°F (23°C)
Visibility	10.00 mi
Heat Index	84°F (29°C)
Last update	17 Sep 7:54 pm CDT

More Information:

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

Detailed forecast for

Calhoun County

Tonight

Partly cloudy with a slight chance of showers and thunderstorms this evening, then mostly clear after midnight. Lows in the lower 70s. Northwest winds around 5 mph, becoming north around 5 mph after midnight. Chance of rain 20 percent.

Friday

Mostly sunny. Humid with highs in the lower 90s. Northeast winds 5 to 10 mph. Heat index values up to 103 in the afternoon.

Friday Night

Mostly clear. Lows in the lower 70s. Southeast winds 5 to 10 mph.

Saturday

Partly sunny. Hot with highs in the mid 90s. Southwest winds 5 to 10 mph.

Saturday Night

Partly cloudy. A slight chance of showers and thunderstorms after midnight. Lows around 70. Southwest winds around 5 mph. Chance of rain 20 percent.

Sunday And Sunday Night

Mostly cloudy. A chance of showers and thunderstorms. Highs around 90. Lows in the mid 60s. Chance of rain 50 percent.

Monday

Showers likely with a slight chance of thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Cooler with highs in the upper 70s. Chance of rain 60 percent.

Monday Night

A slight chance of thunderstorms in the evening. Mostly cloudy with a slight chance of showers. Lows in the upper 50s. Chance of rain 20 percent.

Tuesday

Partly sunny with a 20 percent chance of showers. Highs in the lower 70s.

Tuesday Night

Mostly cloudy in the evening, then becoming partly cloudy. Lows in the mid 50s.

Wednesday Through Thursday

Partly cloudy. Highs in the upper 70s. Lows in the upper 50s.