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Mount Si High School, WA Weather Forecast

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Mount Si High School, WA Weather Forecast

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Mount Si High School WA weather - Clear - 60°F
Clear
60°F
Updated 3:40 am
Feels Like 57°F
Humidity 83%
Wind N 0 mph
Barometer  30.07 in
Dew Point 55°F
Mount Si High School WA weather - Clear - 16°C
Clear
16°C
Updated 3:40 am
Feels Like 14°C
Humidity 83%
Wind N 0 km/h
Barometer  101.8 kPa
Dew Point 13°C
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Mount Si High School Weather Forecast

TODAY TONIGHT SATURDAY SATURDAY NIGHT SUNDAY SUNDAY NIGHT MONDAY MONDAY NIGHT TUESDAY TUESDAY NIGHT WEDNESDAY WEDNESDAY NIGHT
Mount Si High School, WA Weather - Today Mostly Sunny Mount Si High School, WA Weather - Tonight Chance Of Showers Mount Si High School, WA Weather - Saturday Chance Of T-Storm Mount Si High School, WA Weather - Saturday Night Chance Of Showers Mount Si High School, WA Weather - Sunday Mostly Cloudy Mount Si High School, WA Weather - Sunday Night Mostly Cloudy Mount Si High School, WA Weather - Monday Partly Sunny Mount Si High School, WA Weather - Monday Night Partly Cloudy Mount Si High School, WA Weather - Tuesday Chance Of Showers Mount Si High School, WA Weather - Tuesday Night Chance Of Rain Mount Si High School, WA Weather - Wednesday Chance Of Rain Mount Si High School, WA Weather - Wednesday Night Chance Of Rain
Mostly Sunny Chance of Showers Chance of T-Storm Chance of Showers Mostly Cloudy Mostly Cloudy Partly Sunny Partly Cloudy Chance of Showers Chance of Rain Chance of Rain Chance of Rain
Hi: 71°FHi: 22°C
 Lo: 50°FLo: 10°C Hi: 67°FHi: 19°C
 Lo: 50°FLo: 10°C Hi: 66°FHi: 19°C
 Lo: 50°FLo: 10°C Hi: 73°FHi: 23°C
 Lo: 51°FLo: 11°C Hi: 71°FHi: 22°C
 Lo: 51°FLo: 11°C Hi: 63°FHi: 17°C
 Lo: 51°FLo: 11°C
POP = Probability of Precipitation.
Weather Outlook Updated: 236 AM PDT Fri Aug 28 2026 Mount Si High School, WA Weather - WeatherWorld.com

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Issued: 324 AM PDT Fri Aug 28 2026

Aviation

... Westerly to southwesterly flow aloft as upper level troughing remains over western Washington. VFR at terminals early this morning will be brief as incoming stratus will bring a mix of MVFR/IFR ceilings across most terminals. Could see localized LIFR along coastal terminals, and in areas of the Kitsap Peninsula. Ceilings will slowly improve by 19z-21z, with a return of VFR with mid level clouds. S/SW winds will continue generally 3 to 6 knots. Some terminal sites north of King County...