Rosalia, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Rosalia, a town in Whitman County, Washington.
This Afternoon
50°F
Sunny
Sunny. High near 50, with temperatures falling to around 43 in the afternoon. South wind around 2 mph.
7-day forecast for Rosalia
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 50°F | Sunny | 2 mph S | 1% |
| Tonight | 35°F | Slight Chance Rain Showers | 0 to 3 mph SE | 42% |
| Thursday | 49°F | Chance Rain Showers then Partly Sunny | 3 to 8 mph SW | 42% |
| Thursday Night | 36°F | Partly Cloudy | 5 mph S | 0% |
| Friday | 49°F | Mostly Cloudy | 7 mph S | 8% |
| Friday Night | 39°F | Mostly Cloudy | 5 mph S | 10% |
| Saturday | 61°F | Partly Sunny | 2 to 6 mph SE | 4% |
| Saturday Night | 41°F | Mostly Cloudy then Slight Chance Rain Showers | 6 mph SE | 17% |
| Sunday | 53°F | Slight Chance Rain Showers then Mostly Cloudy | 6 to 9 mph S | 17% |
| Sunday Night | 37°F | Mostly Cloudy | 2 to 6 mph S | 5% |
| Monday | 52°F | Mostly Cloudy | 3 mph E | 5% |
| Monday Night | 37°F | Mostly Cloudy then Slight Chance Rain Showers | 2 mph SE | 19% |
| Tuesday | 56°F | Chance Rain Showers | 2 to 6 mph SE | 26% |
| Tuesday Night | 40°F | Chance Rain Showers | 5 mph SE | 26% |
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 Nov 4, 2026.