Sammamish, WA Weather & Growing Conditions
Today
73°F
Mostly Sunny
Mostly sunny, with a high near 73. North northwest wind around 1 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 73°F | Mostly Sunny | 1 mph NNW | 0% |
| Tonight | 51°F | Mostly Clear | 0 mph | 0% |
| Sunday | 74°F | Mostly Sunny | 2 mph NNW | 0% |
| Sunday Night | 51°F | Partly Cloudy | 1 mph N | 0% |
| Monday | 72°F | Partly Sunny | 1 mph NNW | 0% |
| Monday Night | 51°F | Partly Cloudy | 1 mph N | 1% |
| Tuesday | 68°F | Mostly Cloudy | 1 mph N | 1% |
| Tuesday Night | 49°F | Mostly Cloudy | 1 mph SSE | 9% |
| Wednesday | 67°F | Partly Sunny | 1 mph SSW | 13% |
| Wednesday Night | 48°F | Mostly Cloudy | 0 mph | 13% |
| Thursday | 64°F | Mostly Cloudy then Slight Chance Light Rain | 2 mph N | 19% |
| Thursday Night | 48°F | Slight Chance Light Rain | 2 mph NNW | 19% |
| Friday | 63°F | Slight Chance Light Rain | 2 mph NNW | 24% |
| Friday Night | 46°F | Slight Chance Light Rain then Mostly Cloudy | 1 mph NNE | 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 (8.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.