Spearfish, SD Weather & Growing Conditions
Today
74°F
Areas Of Smoke then Sunny
Areas of smoke before noon. Sunny. High near 74, with temperatures falling to around 72 in the afternoon. Northwest wind 1 to 7 mph, with gusts as high as 17 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 74°F | Areas Of Smoke then Sunny | 1 to 7 mph NW | 1% |
| Tonight | 53°F | Partly Cloudy then Slight Chance Rain Showers | 2 to 6 mph S | 17% |
| Wednesday | 82°F | Sunny | 1 to 6 mph N | 5% |
| Wednesday Night | 58°F | Mostly Clear | 6 mph SE | 1% |
| Thursday | 90°F | Sunny | 1 to 8 mph NW | 2% |
| Thursday Night | 63°F | Mostly Clear | 7 mph SW | 0% |
| Friday | 94°F | Sunny | 2 to 9 mph N | 1% |
| Friday Night | 68°F | Mostly Clear | 6 to 10 mph S | 0% |
| Saturday | 95°F | Sunny | 3 to 12 mph NW | 2% |
| Saturday Night | 66°F | Mostly Clear | 3 to 12 mph SE | 4% |
| Sunday | 95°F | Mostly Sunny | 3 to 14 mph SE | 10% |
| Sunday Night | 66°F | Slight Chance Showers And Thunderstorms | 2 to 14 mph SE | 16% |
| Monday | 92°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 2 to 16 mph E | 18% |
| Monday Night | 64°F | Chance Showers And Thunderstorms | 3 to 16 mph SE | 37% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Spearfish, SD
Last spring frost
May 12
First fall frost
Oct 2
Growing season
143 days
Explore more for Spearfish, SD: full frost dates · planting calendar · South Dakota frost dates
Climate data from the nearest NOAA station, Spearfish, Sd (0.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.