Washington, UT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Washington, a city in Washington County, Utah.
Overnight
78°F
Mostly Clear
Mostly clear. Low around 78, with temperatures rising to around 80 overnight. East northeast wind around 5 mph.
7-day forecast for Washington
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 78°F | Mostly Clear | 5 mph ENE | 0% |
| Tuesday | 108°F | Sunny | 2 to 10 mph S | 0% |
| Tuesday Night | 78°F | Mostly Clear | 5 to 10 mph N | 0% |
| Wednesday | 107°F | Sunny | 2 to 9 mph SSE | 0% |
| Wednesday Night | 79°F | Mostly Clear | 3 to 9 mph S | 0% |
| Thursday | 107°F | Sunny | 1 to 6 mph SSW | 1% |
| Thursday Night | 80°F | Mostly Clear | 3 to 7 mph SE | 2% |
| Friday | 110°F | Sunny | 3 mph S | 0% |
| Friday Night | 81°F | Mostly Clear | 5 mph S | 2% |
| Saturday | 109°F | Sunny | 1 to 6 mph S | 0% |
| Saturday Night | 81°F | Mostly Clear | 6 mph SSE | 5% |
| Sunday | 107°F | Sunny then Slight Chance Showers And Thunderstorms | 2 to 7 mph S | 15% |
| Sunday Night | 80°F | Partly Cloudy | 3 to 9 mph SSE | 6% |
| Monday | 102°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 3 to 7 mph SSW | 15% |
Forecast source: National Weather Service (api.weather.gov) for Washington (37.127, -113.488). Updated through the day.
Growing snapshot for Washington
Last spring frost
Mar 14
First fall frost
Nov 10
Growing season
239 days
Hardiness zone
8b
More local growing data for Washington: nearby ZIP 84780 weather · frost dates · planting calendar · Utah frost dates
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Apple Valley
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Hildale
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La Verkin
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New Harmony
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Rockville
Santa Clara
Springdale
St. George
Toquerville
Veyo
Virgin
Climate data from the nearest NOAA station, St George, Ut (7.4 mi from Washington). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.