St. Onge, SD Weather & Growing Conditions
This Afternoon
74°F
Sunny
Sunny, with a high near 74. East wind around 7 mph, with gusts as high as 16 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 74°F | Sunny | 7 mph E | 5% |
| Tonight | 57°F | Chance Showers And Thunderstorms | 2 to 8 mph SE | 57% |
| Saturday | 64°F | Rain Showers Likely | 3 to 13 mph E | 74% |
| Saturday Night | 54°F | Showers And Thunderstorms Likely | 10 to 14 mph E | 74% |
| Sunday | 58°F | Rain Showers | 13 mph E | 98% |
| Sunday Night | 51°F | Showers And Thunderstorms | 6 to 15 mph E | 84% |
| Monday | 63°F | Mostly Cloudy then Chance Rain Showers | 6 to 20 mph E | 40% |
| Monday Night | 50°F | Partly Cloudy | 7 to 21 mph SE | 6% |
| Tuesday | 74°F | Mostly Sunny | 5 to 16 mph SE | 5% |
| Tuesday Night | 54°F | Mostly Clear | 2 to 16 mph SE | 8% |
| Wednesday | 77°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 2 to 7 mph E | 20% |
| Wednesday Night | 55°F | Mostly Clear | 5 to 8 mph S | 12% |
| Thursday | 78°F | Sunny | 3 to 12 mph N | 6% |
| Thursday Night | 55°F | Partly Cloudy | 6 to 12 mph SE | 5% |
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 Sep 19, 2026.