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Archambeault Retention Reservoir Weather Forecast
| TODAY | TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT |
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| Mostly Sunny | Chance of Showers | Mostly Cloudy | Mostly Cloudy | Chance of Showers | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Mostly Clear | Mostly Clear | Mostly Sunny | Chance of Showers |
| Hi: 95°FHi: 35°C | Lo: 65°FLo: 18°C | Hi: 91°FHi: 33°C | Lo: 61°FLo: 16°C | Hi: 85°FHi: 29°C | Lo: 59°FLo: 15°C | Hi: 79°FHi: 26°C | Lo: 50°FLo: 10°C | Hi: 79°FHi: 26°C Lo: 51°FLo: 11°C | Hi: 79°FHi: 26°C Lo: 51°FLo: 11°C | Hi: 85°FHi: 29°C | Lo: 55°FLo: 13°C |
| POP: 30% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 401 AM MDT Thu Aug 27 2026 
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Issued: 1219 AM MDT Thu Aug 27 2026
Key Messages
- Upper ridging will help provide warm and dry weather conditions through this afternoon for NE Montana.
- As the ridge slides east hot temperatures will turn hotter with highs by into the mid 80s to low 90s today and Friday.
- Hit-and-miss thunderstorm chances look to increase for Thursday evening into the weekend.
Discussion
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WEATHER PATTERN OVERVIEW: A wave of showers and thunderstorms is expected to enter the CWA around 5PM and move through tonight along a quasi-lee side mountain troug...