Rosalia, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Rosalia, a town in Whitman County, Washington.
Tonight
49°F
Mostly Clear
Mostly clear, with a low around 49. Southeast wind around 1 mph.
7-day forecast for Rosalia
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 49°F | Mostly Clear | 1 mph SE | 0% |
| Sunday | 82°F | Sunny | 3 mph SE | 0% |
| Sunday Night | 49°F | Mostly Clear | 2 mph E | 0% |
| Monday | 83°F | Sunny | 3 mph S | 0% |
| Monday Night | 51°F | Partly Cloudy | 3 mph S | 0% |
| Tuesday | 79°F | Mostly Sunny | 1 to 6 mph S | 0% |
| Tuesday Night | 49°F | Partly Cloudy | 2 to 6 mph SW | 1% |
| Wednesday | 72°F | Mostly Sunny | 2 to 7 mph SW | 1% |
| Wednesday Night | 46°F | Partly Cloudy | 1 to 6 mph S | 1% |
| Thursday | 71°F | Mostly Sunny | 5 mph S | 4% |
| Thursday Night | 46°F | Partly Cloudy | 3 mph NE | 9% |
| Friday | 68°F | Partly Sunny | 1 to 5 mph SW | 12% |
| Friday Night | 43°F | Mostly Cloudy | 5 mph SW | 13% |
| Saturday | 66°F | Mostly Sunny | 2 to 6 mph SW | 10% |
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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Clarkston Heights-Vineland
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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 Sep 20, 2026.