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Boulder Reservoir Weather Forecast
| TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY |
 |  |  |  | | |  |  |  | |  | |
| Mostly Clear | Sunny | Increasing Clouds | Mostly Cloudy | Increasing Clouds | Mostly Sunny | Chance of Showers | Chance of Showers | Rain Showers | Chance of Showers | Patchy Fog | Patchy Fog |
| Lo: 49°FLo: 9°C | Hi: 88°FHi: 31°C | Lo: 57°FLo: 14°C | Hi: 86°FHi: 30°C | Lo: 53°FLo: 12°C | Hi: 76°FHi: 24°C | Lo: 51°FLo: 11°C | Hi: 75°FHi: 24°C | Lo: 47°FLo: 8°C | Hi: 76°FHi: 24°C | Hi: 79°FHi: 26°C Lo: 48°FLo: 9°C | Hi: 79°FHi: 26°C Lo: 48°FLo: 9°C |
| POP: 30% | POP: 40% | POP: 20% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 230 PM MDT Sun Aug 30 2026 
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Issued: 356 PM MDT Sun Aug 30 2026
Key Messages
- Cool and dry today then warmer Mon and Tue.
- Chance of thunderstorms in S-central ID Mon, and Central ID Tue afternoons.
- A strong low pressure system expected later this week will bring cooler, windier, and wetter conditions.
Aviation
/00Z Monday through Tuesday/... Issued 356 PM MDT SUN AUG 30 2026
VFR under clear skies. Localized visibility reductions due to smoke near wildfires in Baker County and Boise Mountains. Surface winds: W-NW 5-15 kt this evening, then light and variable overn...