Harrington, WA Weather & Growing Conditions
Overnight
49°F
Areas Of Smoke
Areas of smoke. Mostly clear, with a low around 49. Northeast wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 49°F | Areas Of Smoke | 5 mph NE | 0% |
| Tuesday | 87°F | Smoke then Haze | 3 to 7 mph N | 0% |
| Tuesday Night | 54°F | Haze | 3 mph NE | 0% |
| Wednesday | 93°F | Areas Of Smoke | 5 mph S | 0% |
| Wednesday Night | 57°F | Patchy Smoke then Mostly Clear | 5 mph S | 0% |
| Thursday | 98°F | Sunny | 3 to 10 mph S | 0% |
| Thursday Night | 60°F | Mostly Clear | 2 to 8 mph S | 0% |
| Friday | 97°F | Sunny | 5 to 13 mph SW | 0% |
| Friday Night | 59°F | Mostly Clear | 6 to 13 mph W | 0% |
| Saturday | 92°F | Sunny | 6 to 13 mph SW | 0% |
| Saturday Night | 57°F | Mostly Clear | 6 to 13 mph SW | 0% |
| Sunday | 88°F | Sunny | 6 to 10 mph SW | 0% |
| Sunday Night | 54°F | Mostly Clear | 5 to 9 mph SW | 0% |
| Monday | 87°F | Sunny | 6 to 9 mph S | 0% |
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 Aug 4, 2026.