Washington, UT Weather & Growing Conditions
Tonight
64°F
Mostly Clear
Mostly clear. Low around 64, with temperatures rising to around 66 overnight. North wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 64°F | Mostly Clear | 5 mph N | 6% |
| Saturday | 89°F | Sunny | 5 mph SW | 0% |
| Saturday Night | 61°F | Mostly Clear | 5 mph NNE | 0% |
| Sunday | 90°F | Sunny | 0 to 3 mph ESE | 0% |
| Sunday Night | 66°F | Partly Cloudy | 3 mph NNE | 0% |
| Monday | 90°F | Mostly Sunny | 1 to 5 mph SE | 4% |
| Monday Night | 64°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 6 mph N | 30% |
| Tuesday | 87°F | Chance Showers And Thunderstorms | 1 to 5 mph ESE | 31% |
| Tuesday Night | 63°F | Mostly Clear | 2 to 6 mph NNE | 9% |
| Wednesday | 90°F | Sunny | 1 to 5 mph ESE | 7% |
| Wednesday Night | 66°F | Mostly Clear | 0 to 9 mph ENE | 6% |
| Thursday | 92°F | Mostly Sunny | 1 to 6 mph ESE | 5% |
| Thursday Night | 68°F | Partly Cloudy | 3 to 13 mph E | 11% |
| Friday | 91°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 2 to 7 mph SE | 15% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Washington, UT
Last spring frost
Mar 14
First fall frost
Nov 10
Growing season
239 days
Hardiness zone
8b
Explore more for Washington, UT: full frost dates · planting calendar · Utah frost dates
Climate data from the nearest NOAA station, St George, Ut (7.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.