Weather in Ralph, SD
Updated 2026-09-26 09:00 local time · ZIP codes 57650
Partly Cloudy
No government weather alerts were returned for this location at the latest update.
Next hours
62°17% rain67°7% rain
70°4% rain72°1% rain74°1% rain75°1% rain76°1% rain75°0% rain74°0% rain71°0% rain
66°1% rain64°1% rain3-day weather forecast
Weather details
Sunrise, sunset and moon
Key weather changes ahead
Weather insights for today
Rain chance stays relatively low over the next 12 hours (up to 17%).
It feels like 61°F with winds near 6 mph.
71°F, 0% rain chance and 7 mph wind.
Visibility is around 6 mi; gusts may reach 22 mph.
Current temperature is 62°F, wind 6 mph, rain chance up to 17%.
UV index is 1.
Local weather characteristics in Ralph
South Dakota has a continental climate with hot summers, cold winters, frequent wind and strong differences between the Black Hills and the open plains.
Ralph is part of the Midwest weather region. The forecast point is near 45.78°N latitude and 103.07°W longitude. Local temperature, wind and precipitation can still differ from nearby places, especially where terrain, coastlines or urban development create small-scale weather changes.
Ralph weather today
Partly Cloudy and 62°F in Ralph, SD. Today's high is 76°F with a 5% rain chance. Winds are around 6 mph with gusts near 9 mph. Relative humidity is 83%, pressure is 29.81 inHg, and visibility is about 6 miles.
Tonight and tomorrow in Ralph
Sunrise is at 06:44 AM and sunset is at 06:42 PM. Tomorrow's forecast calls for Light rain shower with a high near 66°F and a low near 54°F. The maximum rain chance is 67%.