St. Onge, SD Weather & Growing Conditions
Today
75°F
Areas Of Smoke then Sunny
Areas of smoke before noon. Sunny, with a high near 75. Northwest wind around 7 mph, with gusts as high as 18 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 75°F | Areas Of Smoke then Sunny | 7 mph NW | 1% |
| Tonight | 53°F | Mostly Clear then Slight Chance Rain Showers | 6 mph S | 16% |
| Wednesday | 83°F | Sunny | 1 to 6 mph E | 3% |
| Wednesday Night | 57°F | Mostly Clear | 7 mph S | 1% |
| Thursday | 91°F | Sunny | 3 to 9 mph NW | 1% |
| Thursday Night | 62°F | Mostly Clear | 6 to 9 mph SW | 0% |
| Friday | 94°F | Sunny | 5 to 13 mph N | 1% |
| Friday Night | 66°F | Mostly Clear | 5 to 15 mph S | 0% |
| Saturday | 96°F | Sunny | 3 to 16 mph N | 2% |
| Saturday Night | 64°F | Mostly Clear | 6 to 15 mph SE | 4% |
| Sunday | 95°F | Mostly Sunny | 6 to 21 mph SE | 11% |
| Sunday Night | 65°F | Slight Chance Showers And Thunderstorms | 5 to 20 mph SE | 16% |
| Monday | 92°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 21 mph E | 16% |
| Monday Night | 64°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 8 to 21 mph E | 36% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for St. Onge, SD
Last spring frost
May 12
First fall frost
Oct 2
Growing season
143 days
Hardiness zone
5b
Explore more for St. Onge, SD: full frost dates · planting calendar · South Dakota frost dates
Climate data from the nearest NOAA station, Spearfish, Sd (7.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.