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City of Spearfish, SDSpearfish, SD Weather Forecast
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Spearfish Weather Forecast
| TONIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY |
 |  | |  |  |  | | | | | | |
| Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Clearing | Clear | Sunny | Mostly Clear | Mostly Sunny | Mostly Clear | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm |
| Lo: 59°FLo: 15°C | Hi: 81°FHi: 27°C | Lo: 55°FLo: 13°C | Hi: 85°FHi: 29°C | Lo: 59°FLo: 15°C | Hi: 90°FHi: 32°C | Lo: 61°FLo: 16°C | Hi: 89°FHi: 32°C | Lo: 61°FLo: 16°C | Hi: 85°FHi: 29°C | Lo: 61°FLo: 16°C | Hi: 89°FHi: 32°C |
| POP: 40% | POP: 20% | POP: 40% | POP: 20% | POP: 40% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 547 PM MDT Mon Aug 17 2026 
Spearfish Radar Loop
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Spearfish Weather Map
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Spearfish Forecast Discussion
Issued: 528 PM MDT Mon Aug 17 2026
Key Messages
- Active pattern persists through mid-week with daily chances of storms, some of which may be strong to severe.
- Trending warmer to end the week into next weekend.
Discussion
...(This Evening Through Monday) Issued at 1200 PM MDT Mon Aug 17 2026
Upper level analysis depicts near-zonal flow over the central US. Upper level moisture associated with a weak wave is making its way over the Northern Plains, resulting in mid to high level cloud cover and scattered sh...