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Haystack Reservoir Weather Forecast
| TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY |
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| Chance of Showers | Showers Likely | Chance of Showers | Chance of Showers | Partly Cloudy | Chance of Showers | Chance of Showers | Chance of Showers | Snow Showers | Chance of Rain/Snow | Chance of Rain/Snow | Snow Showers |
| Lo: 35°FLo: 2°C | Hi: 50°FHi: 10°C | Lo: 35°FLo: 2°C | Hi: 50°FHi: 10°C | Lo: 30°FLo: -1°C | Hi: 46°FHi: 8°C | Hi: 46°FHi: 8°C Lo: 26°FLo: -3°C | Hi: 46°FHi: 8°C Lo: 26°FLo: -3°C | Lo: 25°FLo: -4°C | Hi: 43°FHi: 6°C Lo: 25°FLo: -4°C | Hi: 43°FHi: 6°C Lo: 25°FLo: -4°C | Hi: 45°FHi: 7°C |
| POP: 50% | POP: 70% | POP: 50% | POP: 20% | POP: 50% | POP: 20% | POP: 20% | POP: 40% | POP: 20% | POP: 20% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 302 PM PDT Sun Oct 25 2026 
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Issued: 505 PM PDT Sun Oct 25 2026
Key Messages
1. Mountain showers and high elevation snow
2. New pattern will bring slightly below seasonal temperatures
3. Widespread chances of precipitation at the start of the week
Discussion
... Current satellite is showing clouds moving across the region. Radar shows a band of moisture is also moving across the Cascades with ground observations at or above 5400 feet seeing snowfall. Temperatures through the pass are marginal in the low to mid 30s, but expecting some accumulation along the Chinoo...