Washington, UT Weather & Growing Conditions
Tonight
45°F
Mostly Clear
Mostly clear, with a low around 45. East northeast wind 2 to 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 45°F | Mostly Clear | 2 to 6 mph ENE | 2% |
| Wednesday | 61°F | Sunny | 1 to 5 mph N | 2% |
| Wednesday Night | 43°F | Mostly Clear | 5 mph NE | 0% |
| Thursday | 61°F | Mostly Sunny | 0 to 3 mph ENE | 0% |
| Thursday Night | 45°F | Mostly Clear | 0 to 3 mph NE | 0% |
| Friday | 63°F | Sunny | 0 to 3 mph NNE | 0% |
| Friday Night | 45°F | Mostly Clear | 0 to 7 mph NE | 0% |
| Saturday | 66°F | Sunny | 0 to 5 mph N | 0% |
| Saturday Night | 46°F | Clear | 0 to 6 mph NE | 0% |
| Sunday | 69°F | Sunny | 0 to 6 mph E | 0% |
| Sunday Night | 49°F | Partly Cloudy | 0 to 6 mph ENE | 0% |
| Monday | 68°F | Mostly Sunny | 0 to 6 mph E | 2% |
| Monday Night | 50°F | Partly Cloudy | 0 to 3 mph NE | 1% |
| Tuesday | 68°F | Mostly Sunny | 0 to 3 mph NE | 4% |
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 Nov 4, 2026.