Mountlake Terrace, WA Weather & Growing Conditions
Tonight
52°F
Mostly Cloudy
Mostly cloudy, with a low around 52. North wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 52°F | Mostly Cloudy | 2 mph N | 0% |
| Saturday | 70°F | Partly Sunny | 3 mph WNW | 0% |
| Saturday Night | 51°F | Mostly Clear | 3 mph N | 0% |
| Sunday | 69°F | Partly Sunny | 2 to 6 mph N | 0% |
| Sunday Night | 51°F | Partly Cloudy | 2 to 6 mph N | 0% |
| Monday | 69°F | Mostly Sunny | 5 mph NNW | 0% |
| Monday Night | 52°F | Partly Cloudy | 5 mph N | 1% |
| Tuesday | 66°F | Partly Sunny | 3 mph N | 1% |
| Tuesday Night | 51°F | Mostly Cloudy | 3 mph NE | 10% |
| Wednesday | 66°F | Partly Sunny then Slight Chance Light Rain | 1 to 5 mph SW | 15% |
| Wednesday Night | 52°F | Slight Chance Light Rain then Mostly Cloudy | 5 mph N | 15% |
| Thursday | 63°F | Mostly Cloudy then Slight Chance Light Rain | 2 to 7 mph N | 19% |
| Thursday Night | 51°F | Slight Chance Light Rain | 2 to 7 mph N | 19% |
| Friday | 62°F | Slight Chance Light Rain | 2 to 6 mph N | 15% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Mountlake Terrace, WA
Last spring frost
Mar 8
First fall frost
Nov 23
Growing season
259 days
Hardiness zone
9a
Explore more for Mountlake Terrace, WA: full frost dates · planting calendar · Washington frost dates
Climate data from the nearest NOAA station, Seattle Sand Pt Wsfo, Wa (7.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.