Winthrop, WA Weather & Growing Conditions
This Afternoon
43°F
Partly Sunny
Partly sunny. High near 43, with temperatures falling to around 40 in the afternoon. Southwest wind around 1 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 43°F | Partly Sunny | 1 mph SW | 2% |
| Tonight | 35°F | Partly Cloudy | 1 to 6 mph N | 2% |
| Wednesday | 45°F | Sunny | 0 to 3 mph S | 2% |
| Wednesday Night | 35°F | Chance Rain And Snow Showers | 2 mph W | 49% |
| Thursday | 43°F | Mostly Sunny | 0 to 3 mph W | 6% |
| Thursday Night | 33°F | Mostly Cloudy then Chance Snow Showers | 2 mph NW | 37% |
| Friday | 42°F | Chance Snow Showers | 0 to 3 mph SW | 39% |
| Friday Night | 37°F | Slight Chance Rain And Snow Showers | 0 to 3 mph W | 22% |
| Saturday | 43°F | Mostly Cloudy | 0 to 3 mph SE | 13% |
| Saturday Night | 39°F | Chance Rain Showers then Rain And Snow Showers Likely | 0 to 5 mph S | 68% |
| Sunday | 43°F | Rain And Snow Showers Likely | 0 to 5 mph SW | 68% |
| Sunday Night | 34°F | Slight Chance Rain And Snow Showers then Mostly Cloudy | 2 mph NW | 18% |
| Monday | 40°F | Slight Chance Snow Showers | 1 mph S | 37% |
| Monday Night | 36°F | Chance Rain And Snow Showers | 1 mph W | 51% |
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 Nov 4, 2026.