Rosalia, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Rosalia, a town in Whitman County, Washington.
Overnight
47°F
Mostly Clear
Mostly clear, with a low around 47. Wind around 0 mph.
7-day forecast for Rosalia
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 47°F | Mostly Clear | 0 mph | 0% |
| Saturday | 76°F | Sunny | 0 to 3 mph SW | 0% |
| Saturday Night | 48°F | Mostly Clear | 1 mph S | 0% |
| Sunday | 80°F | Sunny | 2 mph SE | 0% |
| Sunday Night | 48°F | Clear | 2 mph NE | 0% |
| Monday | 81°F | Sunny | 1 to 5 mph S | 0% |
| Monday Night | 50°F | Partly Cloudy | 3 mph S | 0% |
| Tuesday | 77°F | Sunny | 1 to 5 mph S | 0% |
| Tuesday Night | 48°F | Partly Cloudy | 1 to 5 mph S | 1% |
| Wednesday | 73°F | Mostly Sunny | 2 to 6 mph SW | 1% |
| Wednesday Night | 46°F | Partly Cloudy | 1 to 5 mph S | 1% |
| Thursday | 73°F | Mostly Sunny | 3 mph S | 3% |
| Thursday Night | 46°F | Partly Cloudy | 3 mph E | 8% |
| Friday | 69°F | Partly Sunny then Slight Chance Rain Showers | 1 to 5 mph S | 16% |
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
Clarkston
Clarkston Heights-Vineland
Colfax
Colton
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 19, 2026.