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Oneal Lake, SD Weather Forecast
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Oneal Lake Weather Forecast
| TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY |
 |  |  |  |  |  | | | | | |  |
| Mostly Clear | Sunny | Partly Cloudy | Chance of Showers | Chance of Showers | Chance of Showers | Chance of Showers | Showers | Showers | Showers | Chance of Showers | Partly Sunny |
| Lo: 49°FLo: 9°C | Hi: 75°FHi: 24°C | Lo: 59°FLo: 15°C | Hi: 79°FHi: 26°C | Lo: 59°FLo: 15°C | Hi: 69°FHi: 21°C | Lo: 41°FLo: 5°C | Hi: 51°FHi: 11°C | Lo: 39°FLo: 4°C | Hi: 49°FHi: 9°C | Lo: 39°FLo: 4°C | Hi: 51°FHi: 11°C |
| POP: 40% | POP: 20% | POP: 50% | POP: 50% | POP: 70% | POP: 70% | POP: 70% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 454 PM CDT Wed Oct 21 2026 
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Issued: 646 PM CDT Wed Oct 21 2026
Key Messages
- Cool overnight temperatures may lead to valley fog by daybreak Thursday. Localized dense fog may be possible.
- Well above normal temperatures, increasing winds, and drying fuels lead to elevated to near critical fire danger Thursday and especially Friday. Harvest activity should use extreme caution.
- A significant cooldown arrives this weekend and continues into next week with highs back into the 50s.
- This cooldown will bring rain risks Saturday which will continue into Monday. Probabi...