Harrington, WA Weather & Growing Conditions
Today
52°F
Sunny
Sunny. High near 52, with temperatures falling to around 45 in the afternoon. South wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 52°F | Sunny | 5 mph S | 1% |
| Tonight | 36°F | Slight Chance Rain Showers | 5 mph SE | 19% |
| Thursday | 52°F | Mostly Sunny | 3 to 7 mph SW | 12% |
| Thursday Night | 36°F | Partly Cloudy | 3 to 8 mph SE | 0% |
| Friday | 52°F | Slight Chance Rain Showers | 10 mph SE | 15% |
| Friday Night | 38°F | Slight Chance Rain Showers | 5 to 8 mph SE | 21% |
| Saturday | 62°F | Partly Sunny | 6 to 9 mph E | 6% |
| Saturday Night | 41°F | Mostly Cloudy | 6 to 10 mph SE | 6% |
| Sunday | 57°F | Mostly Cloudy | 7 to 14 mph SW | 6% |
| Sunday Night | 36°F | Mostly Cloudy | 7 mph S | 4% |
| Monday | 55°F | Partly Sunny | 3 to 8 mph E | 11% |
| Monday Night | 37°F | Mostly Cloudy then Chance Rain Showers | 3 to 7 mph SE | 25% |
| Tuesday | 58°F | Chance Rain Showers | 6 to 9 mph SE | 29% |
| Tuesday Night | 41°F | Chance Rain Showers | 6 to 10 mph SE | 25% |
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 (8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.