Mirrormont, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mirrormont, a community in King County, Washington.
This Afternoon
57°F
Partly Sunny
Partly sunny. High near 57, with temperatures falling to around 51 in the afternoon. Northwest wind around 1 mph.
7-day forecast for Mirrormont
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 57°F | Partly Sunny | 1 mph NW | 4% |
| Tonight | 39°F | Partly Cloudy | 2 mph ESE | 3% |
| Wednesday | 58°F | Mostly Sunny | 0 to 3 mph SSE | 12% |
| Wednesday Night | 45°F | Light Rain | 0 to 8 mph SSE | 98% |
| Thursday | 55°F | Chance Light Rain then Partly Sunny | 0 to 6 mph SSW | 41% |
| Thursday Night | 44°F | Light Rain | 0 to 6 mph SSE | 79% |
| Friday | 54°F | Light Rain | 1 to 6 mph SSE | 79% |
| Friday Night | 45°F | Chance Light Rain | 1 to 5 mph SE | 48% |
| Saturday | 61°F | Chance Light Rain | 1 to 5 mph SSE | 26% |
| Saturday Night | 47°F | Rain | 1 to 12 mph S | 79% |
| Sunday | 54°F | Light Rain | 1 to 12 mph SSW | 79% |
| Sunday Night | 42°F | Slight Chance Light Rain | 1 to 6 mph SSE | 21% |
| Monday | 55°F | Chance Light Rain | 0 to 6 mph SE | 49% |
| Monday Night | 44°F | Light Rain Likely | 0 to 9 mph SSE | 69% |
Forecast source: National Weather Service (api.weather.gov) for Mirrormont (47.460, -121.990). Updated through the day.
Growing snapshot for Mirrormont
Last spring frost
Apr 20
First fall frost
Oct 25
Growing season
187 days
Hardiness zone
8b
More local growing data for Mirrormont: nearby ZIP 98025 weather · frost dates · planting calendar · Washington frost dates
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Climate data from the nearest NOAA station, Landsburg, Wa (4 mi from Mirrormont). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.