Weather WorldStorm Lake, MT Weather Forecast
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Storm Lake Weather Forecast
| TODAY | TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT |
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| Partly Cloudy | Mostly Cloudy | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Mostly Clear | Mostly Sunny | Partly Cloudy | Chance of T-Storm | Partly Cloudy | Chance of T-Storm | Chance of Rain |
| Hi: 86°FHi: 30°C | Lo: 55°FLo: 13°C | Hi: 85°FHi: 29°C | Lo: 50°FLo: 10°C | Hi: 76°FHi: 24°C | Lo: 45°FLo: 7°C | Hi: 76°FHi: 24°C | Lo: 46°FLo: 8°C | Hi: 76°FHi: 24°C | Lo: 46°FLo: 8°C | Hi: 76°FHi: 24°C | Lo: 46°FLo: 8°C |
| POP: 70% | POP: 50% | POP: 30% | POP: 20% | POP: 20% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1232 AM MDT Fri Aug 21 2026 
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Storm Lake Forecast Discussion
Issued: 237 AM MDT Fri Aug 21 2026
Discussion
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KEY MESSAGES:- Dry conditions with abnormally hot temperatures peaks today with elevated dry thunderstorms possible in the afternoon through the overnight.
- Thunderstorms Saturday pose marginal risks for severe-strength winds across the region and excessive rainfall in SW Montana and NC Idaho.
- Elevated to near-critical fire weather on Sunday due to gusty west winds accompanied by a very dry airmass.
High pressure remains in control over the Northern Rockies allowing for intense daytime...