Blaine, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Blaine, a city in Whatcom County, Washington.
Tonight
52°F
Partly Cloudy
Partly cloudy, with a low around 52. East southeast wind around 2 mph.
7-day forecast for Blaine
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 52°F | Partly Cloudy | 2 mph ESE | 0% |
| Saturday | 68°F | Partly Sunny | 5 mph S | 0% |
| Saturday Night | 51°F | Partly Cloudy | 2 mph SE | 0% |
| Sunday | 68°F | Mostly Sunny | 0 to 5 mph WSW | 0% |
| Sunday Night | 52°F | Partly Cloudy | 3 mph S | 0% |
| Monday | 68°F | Mostly Sunny | 1 to 5 mph S | 0% |
| Monday Night | 52°F | Partly Cloudy | 0 to 3 mph SSE | 0% |
| Tuesday | 66°F | Mostly Sunny | 0 to 5 mph S | 2% |
| Tuesday Night | 52°F | Partly Cloudy | 5 mph SSE | 7% |
| Wednesday | 66°F | Partly Sunny | 3 mph S | 8% |
| Wednesday Night | 52°F | Mostly Cloudy | 3 mph NW | 14% |
| Thursday | 67°F | Partly Sunny then Chance Light Rain | 1 to 5 mph N | 25% |
| Thursday Night | 53°F | Chance Light Rain | 5 mph NE | 33% |
| Friday | 66°F | Chance Light Rain | 2 to 6 mph SSE | 33% |
Forecast source: National Weather Service (api.weather.gov) for Blaine (48.987, -122.749). Updated through the day.
Growing snapshot for Blaine
Last spring frost
Mar 31
First fall frost
Nov 4
Growing season
219 days
Hardiness zone
8b
More local growing data for Blaine: nearby ZIP 98230 weather · frost dates · planting calendar · Washington frost dates
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Climate data from the nearest NOAA station, Blaine, Wa (4.3 mi from Blaine). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.