Harrington, WA Weather & Growing Conditions
Overnight
49°F
Mostly Clear
Mostly clear, with a low around 49. North wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 49°F | Mostly Clear | 2 mph N | 0% |
| Saturday | 80°F | Sunny | 0 to 5 mph S | 0% |
| Saturday Night | 50°F | Partly Cloudy | 3 mph E | 0% |
| Sunday | 82°F | Sunny | 2 to 6 mph SE | 0% |
| Sunday Night | 51°F | Mostly Clear | 1 to 5 mph SE | 0% |
| Monday | 83°F | Sunny | 5 to 8 mph SE | 0% |
| Monday Night | 52°F | Partly Cloudy | 1 to 8 mph S | 0% |
| Tuesday | 79°F | Mostly Sunny | 2 to 9 mph S | 0% |
| Tuesday Night | 50°F | Partly Cloudy | 3 to 8 mph S | 0% |
| Wednesday | 74°F | Mostly Sunny | 5 to 9 mph S | 0% |
| Wednesday Night | 48°F | Mostly Cloudy | 3 to 8 mph S | 1% |
| Thursday | 73°F | Mostly Sunny | 6 mph S | 2% |
| Thursday Night | 48°F | Mostly Cloudy | 6 mph N | 8% |
| Friday | 70°F | Partly Sunny | 5 to 8 mph S | 11% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Harrington, WA
Last spring frost
May 31
First fall frost
Sep 12
Growing season
101 days
Hardiness zone
6b
Explore more for Harrington, WA: full frost dates · planting calendar · Washington frost dates
Climate data from the nearest NOAA station, Harrington, Wa (3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.