Granite Falls, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Granite Falls, a city in Snohomish County, Washington.
Tonight
40°F
Mostly Clear
Mostly clear, with a low around 40. East southeast wind around 2 mph.
7-day forecast for Granite Falls
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 40°F | Mostly Clear | 2 mph ESE | 4% |
| Wednesday | 60°F | Mostly Sunny | 2 mph ESE | 13% |
| Wednesday Night | 46°F | Light Rain | 2 to 6 mph SSE | 98% |
| Thursday | 55°F | Light Rain Likely | 3 mph SSE | 66% |
| Thursday Night | 45°F | Light Rain | 2 to 7 mph SE | 88% |
| Friday | 55°F | Light Rain | 2 to 7 mph SE | 88% |
| Friday Night | 46°F | Chance Light Rain | 5 mph ESE | 51% |
| Saturday | 62°F | Chance Light Rain | 5 mph SE | 33% |
| Saturday Night | 47°F | Rain | 2 to 10 mph SSE | 85% |
| Sunday | 55°F | Light Rain | 1 to 9 mph S | 85% |
| Sunday Night | 42°F | Chance Light Rain | 1 to 6 mph ESE | 41% |
| Monday | 57°F | Chance Light Rain | 1 to 5 mph ESE | 51% |
| Monday Night | 45°F | Light Rain Likely | 1 to 8 mph ESE | 72% |
| Tuesday | 58°F | Light Rain Likely | 3 to 8 mph SE | 72% |
Forecast source: National Weather Service (api.weather.gov) for Granite Falls (48.090, -121.969). Updated through the day.
Growing snapshot for Granite Falls
Last spring frost
Mar 24
First fall frost
Nov 2
Growing season
223 days
Hardiness zone
8b
More local growing data for Granite Falls: nearby ZIP 98258 weather · frost dates · planting calendar · Washington frost dates
Nearby towns & communities
Alderwood Manor
Arlington
Arlington Heights
Bothell East
Bothell West
Brier
Bunk Foss
Canyon Creek
Cathcart
Cavalero
Chain Lake
Clearview
Darrington
Eastmont
Edmonds
Esperance
Everett
Fobes Hill
Gold Bar
Hat Island
Kayak Point
Lake Bosworth
Lake Cassidy
Lake Cavanaugh
Lake Goodwin
Lake Roesiger
Lake Stevens
Lake Stickney
Larch Way
Lochsloy
Climate data from the nearest NOAA station, Everett, Wa (6.6 mi from Granite Falls). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.