Umatilla, WA Weather & Growing Conditions
Tonight
36°F
Patchy Fog
Patchy fog. Mostly clear. Low around 36, with temperatures rising to around 38 overnight. North wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 36°F | Patchy Fog | 2 mph N | 0% |
| Wednesday | 51°F | Patchy Fog then Sunny | 2 mph S | 1% |
| Wednesday Night | 39°F | Chance Rain Showers | 3 mph S | 42% |
| Thursday | 56°F | Mostly Sunny | 3 to 9 mph SW | 12% |
| Thursday Night | 38°F | Partly Cloudy | 3 mph S | 3% |
| Friday | 53°F | Mostly Cloudy | 3 mph S | 3% |
| Friday Night | 40°F | Mostly Cloudy | 2 mph SE | 2% |
| Saturday | 56°F | Mostly Sunny | 3 mph NE | 1% |
| Saturday Night | 41°F | Mostly Cloudy | 2 mph SW | 4% |
| Sunday | 57°F | Partly Sunny | 2 to 7 mph SW | 4% |
| Sunday Night | 40°F | Mostly Cloudy | 3 mph SW | 2% |
| Monday | 53°F | Partly Sunny | 2 mph N | 5% |
| Monday Night | 40°F | Mostly Cloudy then Slight Chance Rain Showers | 1 mph SW | 15% |
| Tuesday | 57°F | Slight Chance Rain Showers then Partly Sunny | 3 mph SW | 15% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Umatilla, WA
Last spring frost
Mar 27
First fall frost
Nov 4
Growing season
221 days
Hardiness zone
7b
Explore more for Umatilla, WA: full frost dates · planting calendar · Washington frost dates
Climate data from the nearest NOAA station, Mcnary Dam, Wa (6.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.