74°Mostly Clear0% rainWeather status
Air Quality Alert
Air Quality Alert issued September 7 at 5:53PM CDT by NWS St Louis MO Expires Wed, 12:00 AM CDT.
Official NOAA / NWSWSR-88D DopplerUpdates every 5 minutes
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Hourly forecast
Check the latest hourly conditions, seven-day outlook, rain timing, wind, sunrise and sunset for St. Louis, MO. Forecasts and alerts update from NOAA and the National Weather Service.
74°Mostly Clear0% rain
72°Clear0% rain72°Clear0% rain71°Clear1% rain70°Clear1% rain69°Clear1% rain67°Mostly Clear1% rain67°Mostly Clear1% rainNext 24 hours
Rain Timeline
No meaningful precipitation is expected in the official hourly forecast.
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Official NWS outlook
7-Day Forecast
Today
! NWS
74°66°
Mostly Clear
- Precipitation
- 1%
- Wind
- E 1 to 5 mph
- Sunrise
- 6:36 AM
- Sunset
- 7:24 PM
Tue
96°75°
Mostly Sunny
- Precipitation
- 5%
- Wind
- SE 1 to 6 mph
- Sunrise
- 6:37 AM
- Sunset
- 7:22 PM
Wed
99°72°
Chance Showers And Thunderstorms
- Precipitation
- 94%
- Wind
- SW 6 to 9 mph
- Sunrise
- 6:38 AM
- Sunset
- 7:20 PM
Thu
83°66°
Showers And Thunderstorms
- Precipitation
- 94%
- Wind
- NW 5 mph
- Sunrise
- 6:39 AM
- Sunset
- 7:19 PM
Fri
87°69°
Mostly Sunny then Slight Chance Rain Showers
- Precipitation
- 37%
- Wind
- SE 5 mph
- Sunrise
- 6:40 AM
- Sunset
- 7:17 PM
Sat
90°69°
Chance Showers And Thunderstorms
- Precipitation
- 40%
- Wind
- SW 6 mph
- Sunrise
- 6:40 AM
- Sunset
- 7:16 PM
Sun
90°69°
Slight Chance Rain Showers
- Precipitation
- 15%
- Wind
- S 3 to 7 mph
- Sunrise
- 6:41 AM
- Sunset
- 7:14 PM
Forecasts, icons, precipitation, wind, and alerts are from the National Weather Service. Sunrise and sunset are calculated locally for the selected coordinates.
Weather guidance for your areaPlan with the complete forecast
Safety guides Use current official weather information for St. Louis, MO before making weather-sensitive plans.
Current forecastStart with the hourly forecastCheck when rain, wind, and temperature changes overlap your plans.
Open→Live weatherCheck live radar before leavingUse radar with the forecast to see how precipitation is moving.
Open→Safety guideReview official safety guidancePrepare for storms, flooding, heat, cold, and other hazards.
Open→Healthy weatherInclude air quality in outdoor plansUse official EPA information when planning time outside.
Open→Weather for a healthier day
Healthy Weather
Real Feel74°F
Use caution walking outside
Air Quality Alert is active. Review the official alert before going outside.
WindCalm0 mph
Best walk timeBetter weather window: 11 PM–1 AM
Walking: 0% average rain chance, near 72°F, with winds near 4 mph. Review the active Air Quality Alert.
Official EPA AirNowLocal air qualitySt. Louis, MOView AQI +
More weather details
Wind gustsNot reported
Rain now0%next hour
Humidity53%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
Pressure30.08 in
Visibility10.0 mi
Peak rain chance1%
Dew point60°F
Active alerts2
Official risk outlooks
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Active NWS alerts
Unknown · Unknown
Air Quality Alert
Applies to: Madison; St. Clair; Monroe; St. Charles; Franklin; St. Louis; St. Louis City; JeffersonIssued by: NWS St Louis MOAir Quality Alert issued September 7 at 5:53PM CDT by NWS St Louis MOAlert details
The St. Louis Clean Air Partnership has issued an air quality alert for the St. Louis metropolitan area from 10 AM to 8 PM CDT Tuesday. An Orange air quality forecast means that maximum ozone concentrations are expected to reach levels that pose a health risk. Adverse health effects increase as air quality deteriorates. Ground- level ozone is an air contaminant which can cause breathing difficulties for children, older adults, as well as persons with respiratory problems. Reducing outdoor physical activity is recommended. If it is a regularly scheduled work day you are urged to consider telecommuting, carpooling, or utilizing public transit. Avoid excessive idling and do not top off when refueling motor vehicles. The use of gasoline-powered lawn equipment should be reduced or postponed until late in the day. For more information visit the St. Louis Clean Air Partnership at http://cleanair-stlouis.com/ For current Air Quality Index (AQI) values visit https://www.airnow.gov/Unknown · Unknown