Weather WorldOpal Lake, SD Weather Forecast
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Opal Lake Weather Forecast
| EARLY THIS MORNING | TODAY | TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY |
 |  | | |  |  | |  |  | | | |
| Fog | Partly Cloudy | Patchy Fog | Patchy Fog | Partly Cloudy | Windy | Clearing | Sunny | Clear | Mostly Sunny | Partly Cloudy | Partly Cloudy |
| Hi: 31°FHi: -1°C | Hi: 45°FHi: 7°C | Lo: 25°FLo: -4°C | Hi: 49°FHi: 9°C | Lo: 31°FLo: -1°C | Hi: 51°FHi: 11°C | Lo: 31°FLo: -1°C | Hi: 59°FHi: 15°C | Lo: 35°FLo: 2°C | Hi: 61°FHi: 16°C | Lo: 35°FLo: 2°C | Hi: 59°FHi: 15°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 252 AM MST Thu Nov 12 2026 
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Issued: 445 AM MST Thu Nov 12 2026
Key Messages
- Areas of fog and low clouds late tonight into Thursday morning across western SD.
- Areas of fog may redevelop Thursday night into Friday morning, mainly around the Black Hills foothills and adjacent plains.
- Mild and dry into next week, breezy at times.
Discussion
...(This Evening Through Wednesday) Issued at 1233 PM MST Wed Nov 11 2026
Upper air analysis shows upper ridging over the western third of the CONUS, with northwest flow continuing across the northern Plains. Surface analysis sh...