Rosalia, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Rosalia, a town in Whitman County, Washington.
Overnight
44°F
Areas Of Smoke
Areas of smoke. Mostly clear, with a low around 44. East wind around 1 mph.
7-day forecast for Rosalia
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 44°F | Areas Of Smoke | 1 mph E | 0% |
| Tuesday | 84°F | Areas Of Smoke then Sunny | 5 mph N | 0% |
| Tuesday Night | 47°F | Haze | 3 mph NE | 0% |
| Wednesday | 90°F | Sunny | 2 mph S | 0% |
| Wednesday Night | 50°F | Mostly Clear | 2 mph S | 0% |
| Thursday | 95°F | Sunny | 2 to 6 mph S | 0% |
| Thursday Night | 54°F | Mostly Clear | 1 to 6 mph S | 0% |
| Friday | 93°F | Sunny | 3 to 12 mph SW | 0% |
| Friday Night | 55°F | Mostly Clear | 3 to 10 mph SW | 0% |
| Saturday | 89°F | Sunny | 5 to 10 mph SW | 0% |
| Saturday Night | 53°F | Mostly Clear | 3 to 9 mph SW | 0% |
| Sunday | 85°F | Sunny | 6 to 9 mph SW | 0% |
| Sunday Night | 50°F | Mostly Clear | 3 to 7 mph SW | 0% |
| Monday | 84°F | Sunny | 3 to 7 mph SW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Rosalia (47.236, -117.376). Updated through the day.
Growing snapshot for Rosalia
Last spring frost
May 7
First fall frost
Sep 28
Growing season
144 days
Hardiness zone
6b
More local growing data for Rosalia: nearby ZIP 99170 weather · frost dates · planting calendar · Washington frost dates
Nearby towns & communities
Albion
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Endicott
Farmington
Garfield
LaCrosse
Lamont
Malden
Oakesdale
Palouse
Pullman
St. John
Steptoe
Tekoa
Uniontown
West Clarkston-Highland
Climate data from the nearest NOAA station, Rosalia, Wa (2 mi from Rosalia). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.