Mountlake Terrace, WA Weather & Growing Conditions
Tonight
40°F
Patchy Fog
Patchy fog between 11pm and 3am. Mostly clear, with a low around 40. East wind 0 to 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 40°F | Patchy Fog | 0 to 3 mph E | 3% |
| Wednesday | 55°F | Mostly Sunny then Slight Chance Light Rain | 6 mph SSE | 19% |
| Wednesday Night | 48°F | Light Rain | 6 to 9 mph SSE | 86% |
| Thursday | 55°F | Slight Chance Light Rain then Partly Sunny | 7 mph S | 19% |
| Thursday Night | 47°F | Light Rain | 6 to 9 mph SSE | 76% |
| Friday | 54°F | Light Rain | 7 to 10 mph SSE | 76% |
| Friday Night | 48°F | Chance Light Rain | 2 to 7 mph SSE | 50% |
| Saturday | 59°F | Chance Light Rain | 2 to 6 mph SSE | 33% |
| Saturday Night | 50°F | Light Rain Likely | 6 to 16 mph S | 73% |
| Sunday | 55°F | Light Rain Likely | 5 to 15 mph S | 70% |
| Sunday Night | 45°F | Slight Chance Light Rain | 5 mph SSE | 21% |
| Monday | 54°F | Chance Light Rain | 6 mph SE | 54% |
| Monday Night | 47°F | Light Rain Likely | 6 to 10 mph SSE | 72% |
| Tuesday | 56°F | Light Rain Likely | 7 to 13 mph SSE | 72% |
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 Nov 4, 2026.