Sammamish, WA Weather & Growing Conditions
This Afternoon
73°F
Mostly Sunny
Mostly sunny. High near 73, with temperatures falling to around 71 in the afternoon. Northwest wind around 1 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 73°F | Mostly Sunny | 1 mph NW | 0% |
| Tonight | 51°F | Mostly Clear | 0 mph | 0% |
| Sunday | 74°F | Mostly Sunny | 2 mph NNW | 0% |
| Sunday Night | 51°F | Partly Cloudy | 2 mph N | 0% |
| Monday | 71°F | Partly Sunny | 2 mph NNW | 0% |
| Monday Night | 51°F | Partly Cloudy | 2 mph N | 1% |
| Tuesday | 68°F | Mostly Cloudy | 1 mph N | 1% |
| Tuesday Night | 49°F | Mostly Cloudy | 1 mph SSE | 10% |
| Wednesday | 66°F | Partly Sunny | 1 mph SSW | 14% |
| Wednesday Night | 48°F | Mostly Cloudy | 0 mph | 14% |
| Thursday | 63°F | Mostly Cloudy then Slight Chance Light Rain | 2 mph N | 20% |
| Thursday Night | 47°F | Slight Chance Light Rain | 2 mph NNW | 20% |
| Friday | 63°F | Slight Chance Light Rain | 2 mph NNW | 24% |
| Friday Night | 46°F | Slight Chance Light Rain then Mostly Cloudy | 1 mph NNW | 19% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Sammamish, WA
Last spring frost
Mar 30
First fall frost
Nov 7
Growing season
223 days
Hardiness zone
8b
Explore more for Sammamish, WA: full frost dates · planting calendar · Washington frost dates
Climate data from the nearest NOAA station, Snoqualmie Falls, Wa (9.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.