Weather WorldSummit, WA Weather Forecast
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Summit Weather Forecast
| TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY |
 |  |  | | | |  | |  |  | |  |
| Mostly Cloudy | Mostly Cloudy | Patchy Fog | Patchy Fog | Patchy Fog | Patchy Fog | Mostly Clear | Mostly Cloudy | Chance of Rain | Mostly Sunny | Chance of Rain | Chance of Rain |
| Lo: 45°FLo: 7°C | Hi: 56°FHi: 13°C | Lo: 45°FLo: 7°C | Hi: 56°FHi: 13°C | Lo: 40°FLo: 4°C | Hi: 65°FHi: 18°C | Lo: 43°FLo: 6°C | Hi: 60°FHi: 16°C | Lo: 40°FLo: 4°C | Hi: 57°FHi: 14°C | Lo: 40°FLo: 4°C | Hi: 55°FHi: 13°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 236 PM PDT Sun Oct 18 2026 
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Issued: 821 PM PDT Sun Oct 18 2026
Aviation
... Southwesterly flow aloft is expected tonight into Monday as an upper trough digs southward offshore. Increasing high level moisture later tonight is expected to limit areal coverage of low clouds on Monday morning with the exception of more fog prone locations in the Southwest Interior and extreme southern Puget Sound for the potential of IFR/LIFR conditions. Impacted terminals expected to improve by the afternoon, for widespread VFR conditions. Light northerly to calm winds tonight....