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O'Brien Lake Weather Forecast
| REST OF TODAY | TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT |
 |  | |  |  |  | | | | | | |
| Partly Sunny | Patchy Fog | Patchy Fog | Chance of Showers | Chance of Showers | Mostly Cloudy | Chance of Showers | Chance of Showers | Chance of Showers | Chance of Showers | Clouds | Clouds |
| Hi: 71°FHi: 22°C | Lo: 49°FLo: 9°C | Hi: 71°FHi: 22°C | Lo: 55°FLo: 13°C | Hi: 71°FHi: 22°C | Lo: 51°FLo: 11°C | Hi: 70°FHi: 21°C | Lo: 51°FLo: 11°C | Hi: 69°FHi: 21°C | Lo: 51°FLo: 11°C | Hi: 71°FHi: 22°C | Lo: 51°FLo: 11°C |
| POP: 20% | POP: 30% | POP: 20% | POP: 30% | POP: 40% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 322 PM CDT Wed Sep 16 2026 
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Issued: 132 PM CDT Wed Sep 16 2026
Key Messages
- Patchy fog tonight, mainly across the western and central thirds of the state.
- Seasonable temperatures through the end of week, with highs mostly in the 60s and 70s. Lows tonight could fall into the upper 30s in the far northwest.
- Scattered showers today, then near daily chances for rain showers Thursday thorugh Sunday.
Discussion
... Issued at 130 PM CDT Wed Sep 16 2026
Currently near zonal flow is across the Dakotas, with a large upper level low digging through northern California. At...