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Main Lake Weather Forecast
| TODAY | TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT |
 |  | |  |  | |  | |  |  | | |
| Chance of T-Storm | Partly Cloudy | Chance of T-Storm | Mostly Clear | Sunny | Mostly Clear | Partly Cloudy | Partly Cloudy | Chance of Showers | Chance of T-Storm | Chance of T-Storm | Partly Cloudy |
| Hi: 83°FHi: 28°C | Lo: 55°FLo: 13°C | Hi: 75°FHi: 24°C | Lo: 53°FLo: 12°C | Hi: 75°FHi: 24°C | Lo: 48°FLo: 9°C | Hi: 75°FHi: 24°C Lo: 55°FLo: 13°C | Hi: 75°FHi: 24°C Lo: 55°FLo: 13°C | Hi: 83°FHi: 28°C | Lo: 63°FLo: 17°C | Hi: 83°FHi: 28°C | Hi: 75°FHi: 24°C Lo: 55°FLo: 13°C |
| POP: 40% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 437 AM CDT Thu Aug 20 2026 
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Main Lake Forecast Discussion
Issued: 403 AM CDT Thu Aug 20 2026
Key Messages
- Next chance for strong thunderstorms are late Monday and Monday night.
Discussion
... Issued at 235 PM CDT Wed Aug 19 2026
...Synopsis...
Northwesterly flow aloft continues with various weak shortwaves moving into the Plains. One such shortwave comes through tonight and Thursday, bringing a surface low with some weak cold air advection behind it. The northwesterly flow amplifies a bit into the weekend as ridging builds over the Rockies/Western Plains. A shor...