St. Onge, SD Weather & Growing Conditions
This Afternoon
54°F
Sunny
Sunny. High near 54, with temperatures falling to around 46 in the afternoon. Northwest wind 8 to 16 mph, with gusts as high as 24 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 54°F | Sunny | 8 to 16 mph NW | 0% |
| Tonight | 31°F | Mostly Clear | 8 mph W | 0% |
| Wednesday | 51°F | Partly Sunny | 9 mph W | 0% |
| Wednesday Night | 32°F | Mostly Cloudy | 9 mph W | 0% |
| Thursday | 55°F | Sunny | 5 to 8 mph SE | 0% |
| Thursday Night | 34°F | Partly Cloudy | 3 to 8 mph SW | 0% |
| Friday | 53°F | Mostly Sunny | 3 to 9 mph W | 1% |
| Friday Night | 37°F | Mostly Clear | 6 to 13 mph SW | 5% |
| Saturday | 57°F | Sunny | 10 to 23 mph W | 4% |
| Saturday Night | 37°F | Mostly Clear | 6 to 12 mph SW | 1% |
| Sunday | 65°F | Sunny | 8 mph SW | 0% |
| Sunday Night | 44°F | Mostly Clear | 9 to 14 mph SW | 0% |
| Monday | 59°F | Sunny | 6 to 10 mph NW | 0% |
| Monday Night | 38°F | Partly Cloudy | 7 mph SW | 1% |
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 Nov 4, 2026.