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Safety guides Use current official weather information for Grenville, South Dakota 57239 before making weather-sensitive plans.
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Open→Weather status
No active NWS alerts found for Grenville, South Dakota 57239
Conditions can change quickly. Keep Wireless Emergency Alerts enabled and continue to monitor official information.
Official NOAA / NWSWSR-88D DopplerUpdates every 5 minutes
Live Doppler radar
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What’s next
Hourly forecast
Check the latest hourly conditions, seven-day outlook, rain timing, wind, sunrise and sunset for Grenville, South Dakota 57239. Forecasts and alerts update from NOAA and the National Weather Service.
78°Mostly Cloudy1% rain77°Mostly Cloudy2% rain74°Mostly Cloudy2% rain71°Mostly Cloudy3% rain69°Mostly Cloudy4% rain67°Mostly Cloudy4% rain66°Mostly Cloudy8% rain65°Mostly Cloudy11% rainNext 24 hours
Rain Timeline
No meaningful precipitation is expected in the official hourly forecast.
1%None
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14%None
7%None
7%None
5%None
4%None
2%None
3%None
0%None
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Official NWS outlook
7-Day Forecast
Today
78°62°
Mostly Cloudy
- Precipitation
- 14%
- Wind
- SSE 5 to 10 mph
- Sunrise
- 6:41 AM
- Sunset
- 8:25 PM
Mon
80°64°
Mostly Sunny
- Precipitation
- 35%
- Wind
- S 8 to 12 mph
- Sunrise
- 6:42 AM
- Sunset
- 8:23 PM
Tue
82°61°
Sunny
- Precipitation
- 7%
- Wind
- WSW 8 to 20 mph
- Sunrise
- 6:43 AM
- Sunset
- 8:22 PM
Wed
77°56°
Sunny
- Precipitation
- 0%
- Wind
- NW 10 to 17 mph
- Sunrise
- 6:44 AM
- Sunset
- 8:20 PM
Thu
78°58°
Sunny
- Precipitation
- 7%
- Wind
- NNE 6 mph
- Sunrise
- 6:45 AM
- Sunset
- 8:18 PM
Fri
79°61°
Mostly Sunny then Slight Chance Rain Showers
- Precipitation
- 39%
- Wind
- SE 8 to 13 mph
- Sunrise
- 6:47 AM
- Sunset
- 8:16 PM
Sat
80°63°
Chance Rain Showers
- Precipitation
- 28%
- Wind
- SE 8 to 12 mph
- Sunrise
- 6:48 AM
- Sunset
- 8:15 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 Feel77°F
Good conditions for walking
Conditions look reasonable, but stay alert for quick weather changes.
WindE9 mph
Best walk timeBetter weather window: 7 PM–9 PM
Walking: 2% average rain chance, near 76°F, with winds near 5 mph.
Official EPA AirNowLocal air qualityGrenville, South Dakota 57239View AQI +
More weather details
Wind gustsNot reported
Rain now1%next hour
Humidity52%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
Pressure29.99 in
Visibility—
Peak rain chance14%
Dew point58°F
Active alertsNone
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