Harrington, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Harrington, a city in Lincoln County, Washington.
Tonight
49°F
Mostly Clear
Mostly clear, with a low around 49. Northwest wind 0 to 3 mph.
7-day forecast for Harrington
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 49°F | Mostly Clear | 0 to 3 mph NW | 0% |
| Saturday | 80°F | Sunny | 0 to 5 mph S | 0% |
| Saturday Night | 50°F | Partly Cloudy | 3 mph SE | 0% |
| Sunday | 83°F | Sunny | 2 to 6 mph SE | 0% |
| Sunday Night | 51°F | Mostly Clear | 1 to 5 mph E | 0% |
| Monday | 83°F | Sunny | 7 mph SE | 0% |
| Monday Night | 52°F | Partly Cloudy | 1 to 7 mph SW | 0% |
| Tuesday | 80°F | Mostly Sunny | 2 to 9 mph S | 0% |
| Tuesday Night | 50°F | Partly Cloudy | 3 to 7 mph S | 0% |
| Wednesday | 75°F | Mostly Sunny | 5 to 9 mph S | 0% |
| Wednesday Night | 49°F | Mostly Cloudy | 3 to 8 mph S | 1% |
| Thursday | 74°F | Mostly Sunny | 6 mph S | 2% |
| Thursday Night | 48°F | Mostly Cloudy | 5 mph N | 8% |
| Friday | 70°F | Partly Sunny | 5 to 8 mph S | 11% |
Forecast source: National Weather Service (api.weather.gov) for Harrington (47.480, -118.255). Updated through the day.
Growing snapshot for Harrington
Last spring frost
May 31
First fall frost
Sep 12
Growing season
101 days
Hardiness zone
6b
More local growing data for Harrington: nearby ZIP 99134 weather · frost dates · planting calendar · Washington frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Harrington, Wa (3 mi from Harrington). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.