Prosser, WA Weather & Growing Conditions
Today
87°F
Smoke
Smoke. Sunny, with a high near 87. North wind 5 to 9 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 87°F | Smoke | 5 to 9 mph N | 0% |
| Tonight | 56°F | Areas Of Smoke | 0 to 8 mph N | 0% |
| Wednesday | 92°F | Areas Of Smoke | 2 mph NE | 0% |
| Wednesday Night | 59°F | Patchy Smoke then Clear | 2 mph NE | 0% |
| Thursday | 97°F | Sunny | 0 to 5 mph SW | 0% |
| Thursday Night | 63°F | Clear | 2 to 7 mph W | 0% |
| Friday | 96°F | Sunny | 2 to 6 mph SW | 0% |
| Friday Night | 62°F | Clear | 1 to 9 mph W | 0% |
| Saturday | 92°F | Sunny | 1 to 5 mph SW | 0% |
| Saturday Night | 60°F | Mostly Clear | 3 to 9 mph W | 0% |
| Sunday | 88°F | Sunny | 6 mph SW | 0% |
| Sunday Night | 57°F | Mostly Clear | 3 to 8 mph W | 0% |
| Monday | 86°F | Sunny | 5 mph SW | 0% |
| Monday Night | 56°F | Clear | 2 to 7 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Prosser, WA
Last spring frost
Apr 14
First fall frost
Oct 22
Growing season
189 days
Hardiness zone
7b
Explore more for Prosser, WA: full frost dates · planting calendar · Washington frost dates
Climate data from the nearest NOAA station, Prosser, Wa (4.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.