Sudden Valley, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Sudden Valley, a community in Whatcom County, Washington.
Today
85°F
Sunny then Patchy Smoke
Patchy smoke after 1pm. Sunny, with a high near 85. Northwest wind 0 to 3 mph.
7-day forecast for Sudden Valley
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Sunny then Patchy Smoke | 0 to 3 mph NW | 0% |
| Tonight | 57°F | Patchy Smoke | 2 mph NNW | 0% |
| Wednesday | 88°F | Patchy Smoke | 0 to 3 mph NW | 0% |
| Wednesday Night | 58°F | Mostly Clear | 2 mph E | 0% |
| Thursday | 87°F | Sunny | 2 mph N | 0% |
| Thursday Night | 59°F | Mostly Clear | 2 mph W | 0% |
| Friday | 83°F | Sunny | 1 to 5 mph SSW | 0% |
| Friday Night | 57°F | Mostly Clear | 3 mph S | 0% |
| Saturday | 79°F | Sunny | 1 to 6 mph SSW | 0% |
| Saturday Night | 55°F | Mostly Clear | 1 to 5 mph S | 0% |
| Sunday | 76°F | Mostly Sunny | 5 mph SSW | 0% |
| Sunday Night | 54°F | Mostly Clear | 1 to 5 mph S | 3% |
| Monday | 76°F | Mostly Sunny | 1 to 5 mph SSW | 3% |
| Monday Night | 54°F | Partly Cloudy | 1 to 5 mph SW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Sudden Valley (48.723, -122.344). Updated through the day.
Growing snapshot for Sudden Valley
Last spring frost
Apr 1
First fall frost
Nov 2
Growing season
216 days
Hardiness zone
8a
More local growing data for Sudden Valley: nearby ZIP 98229 weather · frost dates · planting calendar · Washington frost dates
Nearby towns & communities
Acme
Bellingham
Birch Bay
Blaine
Custer
Deming
Everson
Ferndale
Geneva
Glacier
Kendall
Lynden
Maple Falls
Marietta-Alderwood
Nooksack
Peaceful Valley
Point Roberts
Sumas
Climate data from the nearest NOAA station, Bellingham 3 Ssw, Wa (5.2 mi from Sudden Valley). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.