Harman US

Winthrop, WA Weather & Growing Conditions

Tonight
51°F
Partly Cloudy
Partly cloudy. Low around 51, with temperatures rising to around 53 overnight. North wind 3 to 7 mph.

7-day forecast

WhenTempForecastWindPrecip
Tonight 51°F Partly Cloudy 3 to 7 mph N 1%
Saturday 69°F Mostly Sunny 1 to 5 mph NE 0%
Saturday Night 52°F Partly Cloudy 5 mph N 0%
Sunday 69°F Sunny 5 mph W 0%
Sunday Night 51°F Mostly Clear 5 mph NW 0%
Monday 69°F Sunny 0 to 5 mph SW 0%
Monday Night 48°F Partly Cloudy 5 to 9 mph NW 0%
Tuesday 65°F Mostly Sunny 1 to 6 mph SW 1%
Tuesday Night 45°F Partly Cloudy 5 to 8 mph W 0%
Wednesday 61°F Mostly Sunny 1 to 6 mph SW 3%
Wednesday Night 47°F Mostly Cloudy 1 to 5 mph NW 5%
Thursday 61°F Partly Sunny 0 to 5 mph N 12%
Thursday Night 50°F Mostly Cloudy then Slight Chance Rain Showers 5 mph NW 16%
Friday 59°F Slight Chance Rain Showers then Mostly Sunny 2 to 6 mph W 16%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for Winthrop, WA

Last spring frost
May 15
First fall frost
Sep 22
Growing season
127 days
Hardiness zone
6b

Explore more for Winthrop, WA: full frost dates · planting calendar · Washington frost dates

Climate data from the nearest NOAA station, Winthrop 1 Wsw, Wa (8.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.