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Shewag Lake Weather Forecast
| TODAY | TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT |
 |  |  |  | |  | |  | |  | | |
| Chance of T-Storm | Chance of Rain | Mostly Sunny | Mostly Clear | Mostly Sunny | Partly Cloudy | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of Rain | Chance of T-Storm | Partly Cloudy |
| Hi: 76°FHi: 24°C | Lo: 50°FLo: 10°C | Hi: 80°FHi: 27°C | Lo: 50°FLo: 10°C | Hi: 86°FHi: 30°C | Lo: 56°FLo: 13°C | Hi: 86°FHi: 30°C | Lo: 56°FLo: 13°C | Hi: 80°FHi: 27°C | Lo: 50°FLo: 10°C | Hi: 76°FHi: 24°C | Lo: 50°FLo: 10°C |
| POP: 30% | POP: 20% | POP: 20% | POP: 40% | POP: 50% | POP: 20% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1222 AM MDT Tue Aug 18 2026 
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Shewag Lake Forecast Discussion
Issued: 148 PM MDT Mon Aug 17 2026
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KEY MESSAGES:
- Shower and thunderstorm activity will continue each afternoon through Tuesday.
- Warming and drying latter part of next week under a ridge of high pressure.
- Tropical moisture surge late week.
Another round of afternoon thunderstorms is expected today and Tuesday. In general, the storms today will remain south of I-90 and along the Continental Divide. With similar atmospheric moisture to previous days, brief but heavy rain can be expected with...