Harrington, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Harrington, a city in Lincoln County, Washington.
Today
53°F
Mostly Cloudy
Mostly cloudy. High near 53, with temperatures falling to around 47 in the afternoon. Northeast wind 2 to 8 mph.
7-day forecast for Harrington
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 53°F | Mostly Cloudy | 2 to 8 mph NE | 3% |
| Tonight | 32°F | Mostly Cloudy then Patchy Fog | 3 mph NE | 3% |
| Wednesday | 52°F | Patchy Fog then Sunny | 1 to 5 mph S | 2% |
| Wednesday Night | 35°F | Chance Rain Showers | 5 mph S | 52% |
| Thursday | 52°F | Chance Rain Showers then Partly Sunny | 5 to 9 mph SW | 52% |
| Thursday Night | 36°F | Partly Cloudy | 7 mph S | 10% |
| Friday | 54°F | Mostly Cloudy | 7 to 12 mph S | 10% |
| Friday Night | 37°F | Mostly Cloudy | 5 to 9 mph SE | 3% |
| Saturday | 60°F | Partly Sunny | 6 to 9 mph SE | 2% |
| Saturday Night | 41°F | Mostly Cloudy then Slight Chance Rain Showers | 6 to 10 mph SE | 21% |
| Sunday | 58°F | Slight Chance Rain Showers then Mostly Cloudy | 9 to 17 mph SW | 21% |
| Sunday Night | 37°F | Mostly Cloudy | 5 to 9 mph SE | 10% |
| Monday | 55°F | Mostly Cloudy then Slight Chance Rain Showers | 5 to 9 mph E | 18% |
| Monday Night | 37°F | Chance Rain Showers | 6 mph SE | 30% |
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 Nov 3, 2026.