89°Mostly Clear2% rainOfficial NWS alert status
Extreme Heat Warning
Extreme Heat Warning issued August 15 at 1:58PM CDT until August 16 at 9:00PM CDT by NWS St Louis MO Expires Sun, 9:00 PM CDT.
Official NOAA / NWSWSR-88D DopplerUpdates every 5 minutes
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What’s next
Hourly forecast
Check the latest hourly conditions, seven-day outlook, rain timing, wind, sunrise and sunset for Saint Charles, Missouri 63301. Forecasts and alerts update from NOAA and the National Weather Service.
89°Mostly Clear2% rain
87°Partly Cloudy2% rain
85°Mostly Cloudy2% rain84°Mostly Clear2% rain83°Mostly Cloudy2% rain81°Mostly Cloudy3% rain81°Mostly Cloudy5% rain80°Cloudy7% rainNext 24 hours
Rain Timeline
Scattered precipitation is possible. The highest official hourly chance is 21%; check the radar before heading out.
2%None
2%None
2%None
2%None
2%None
3%None
5%None
7%None
10%None
13%None
13%None
12%None
9%None
6%None
6%None
5%None
4%None
3%None
8%None
14%None
17%Thunderstorms
21%Thunderstorms
21%Thunderstorms
21%Thunderstorms
Official NWS outlook
7-Day Forecast
Today
! NWS
89°77°
Mostly Cloudy
- Precipitation
- 13%
- Wind
- SW 6 mph
- Sunrise
- 6:17 AM
- Sunset
- 7:58 PM
Sun
93°71°
Partly Sunny then Slight Chance Showers And Thunderstorms
- Precipitation
- 30%
- Wind
- W 3 to 8 mph
- Sunrise
- 6:18 AM
- Sunset
- 7:57 PM
Mon
85°67°
Sunny
- Precipitation
- 3%
- Wind
- N 7 mph
- Sunrise
- 6:18 AM
- Sunset
- 7:56 PM
Tue
89°73°
Sunny
- Precipitation
- 20%
- Wind
- S 2 mph
- Sunrise
- 6:19 AM
- Sunset
- 7:54 PM
Wed
88°68°
Chance Showers And Thunderstorms
- Precipitation
- 26%
- Wind
- N 9 mph
- Sunrise
- 6:20 AM
- Sunset
- 7:53 PM
Thu
82°65°
Slight Chance Rain Showers
- Precipitation
- 23%
- Wind
- NE 6 mph
- Sunrise
- 6:21 AM
- Sunset
- 7:52 PM
Fri
83°66°
Slight Chance Showers And Thunderstorms
- Precipitation
- 15%
- Wind
- E 6 mph
- Sunrise
- 6:22 AM
- Sunset
- 7:50 PM
Forecasts, icons, precipitation, wind, and alerts are from the National Weather Service. Sunrise and sunset are calculated locally for the selected coordinates.
Weather for a healthier day
Healthy Weather
Real Feel98°F
Walking is not recommended now
Review the active Extreme Heat Warning before going outside. MyUSA.us will not recommend this activity while an NWS watch, warning, or emergency is active.
WindS5 mph
Best walk timeReview the active Extreme Heat Warning before leaving
MyUSA.us will not recommend an outing window while an NWS watch, warning, or emergency is active. Follow the official alert and local instructions.
Official EPA AirNowLocal air qualitySaint Charles, Missouri 63301View AQI +
More weather details
Wind gustsNot reported
Rain now2%next hour
Humidity59%current
UV indexCheckingEPA forecast
Wind impact: Light wind with little expected outdoor impact.
“Better weather window” is planning guidance based on official NWS data—not a promise of safe conditions. Review active alerts and radar before leaving.
Storm & DetailsGusts, pressure, visibility and official risk outlooksView details +
Wind gustNot reported
Pressure30.01 in
Visibility10.0 mi
Peak rain chance21%
Dew point73°F
Active alerts1
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