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Keystone Elementary School Weather Forecast
| TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY |
 |  |  |  |  | | |  |  |  | | |
| Mostly Clear | Sunny | Mostly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Mostly Cloudy | Chance of Showers | Chance of Showers | Chance of Showers | Mostly Cloudy |
| Lo: 50°FLo: 10°C | Hi: 83°FHi: 28°C | Lo: 53°FLo: 12°C | Hi: 77°FHi: 25°C | Lo: 50°FLo: 10°C | Hi: 71°FHi: 22°C Lo: 46°FLo: 8°C | Hi: 71°FHi: 22°C Lo: 46°FLo: 8°C | Hi: 71°FHi: 22°C | Lo: 50°FLo: 10°C | Hi: 63°FHi: 17°C Lo: 46°FLo: 8°C | Hi: 63°FHi: 17°C Lo: 46°FLo: 8°C | Hi: 60°FHi: 16°C Lo: 40°FLo: 4°C |
| POP: 40% | POP: 50% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 209 PM PDT Sun Sep 20 2026 
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Issued: 1053 PM PDT Sun Sep 20 2026
Key Messages
- Warm temperatures through Tuesday with afternoon highs in the high 70s to mid 80s.
- Temperatures begin cooling midweek, with an increasing risk for showers and high elevation snow Friday into Saturday.
- Breezy Tuesday into Wednesday. Potential for stronger winds Friday with a cold front passage.
Discussion
... Monday-Tuesday: The upper-level ridge will begin to slowly flatten today and Tuesday as a broad upper-level crosses over 130W and shortwaves begin ejecting into British Columbia. B...