Winthrop, WA Weather & Growing Conditions
Today
76°F
Areas Of Smoke then Haze
Areas of smoke before 10am, then haze and areas of smoke. Sunny, with a high near 76. East wind 1 to 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 76°F | Areas Of Smoke then Haze | 1 to 6 mph E | 1% |
| Tonight | 58°F | Haze then Smoke | 2 to 6 mph NW | 1% |
| Wednesday | 80°F | Smoke | 1 to 6 mph S | 0% |
| Wednesday Night | 60°F | Smoke then Mostly Clear | 2 to 7 mph W | 0% |
| Thursday | 84°F | Sunny | 2 to 6 mph W | 0% |
| Thursday Night | 63°F | Mostly Clear | 6 to 9 mph W | 0% |
| Friday | 81°F | Sunny | 5 to 12 mph NW | 0% |
| Friday Night | 60°F | Mostly Clear | 7 to 12 mph NW | 0% |
| Saturday | 77°F | Sunny | 3 to 10 mph NW | 0% |
| Saturday Night | 58°F | Mostly Clear | 7 to 10 mph NW | 0% |
| Sunday | 75°F | Sunny | 2 to 9 mph NW | 1% |
| Sunday Night | 57°F | Mostly Clear | 6 to 9 mph NW | 1% |
| Monday | 75°F | Sunny | 3 to 7 mph W | 2% |
| Monday Night | 56°F | Mostly Clear | 8 mph NW | 1% |
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 Aug 4, 2026.