Fort Defiance, AZ Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fort Defiance, a community in Mckinley County, Arizona.
Today
54°F
Sunny
Sunny. High near 54, with temperatures falling to around 49 in the afternoon. West wind 12 to 17 mph, with gusts as high as 28 mph.
7-day forecast for Fort Defiance
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 54°F | Sunny | 12 to 17 mph W | 1% |
| Tonight | 28°F | Clear | 3 to 9 mph NW | 1% |
| Thursday | 54°F | Mostly Sunny | 0 to 5 mph SE | 0% |
| Thursday Night | 31°F | Mostly Cloudy | 2 mph E | 2% |
| Friday | 56°F | Partly Sunny | 0 to 6 mph W | 11% |
| Friday Night | 29°F | Mostly Clear | 2 to 6 mph N | 7% |
| Saturday | 56°F | Sunny | 3 to 8 mph N | 0% |
| Saturday Night | 30°F | Mostly Clear | 2 mph NE | 0% |
| Sunday | 60°F | Sunny | 0 to 3 mph E | 0% |
| Sunday Night | 32°F | Mostly Clear | 2 mph NE | 0% |
| Monday | 61°F | Mostly Sunny | 2 mph W | 1% |
| Monday Night | 33°F | Partly Cloudy | 1 mph NW | 1% |
| Tuesday | 59°F | Mostly Sunny | 0 to 5 mph W | 5% |
| Tuesday Night | 33°F | Partly Cloudy | 2 mph NW | 4% |
Forecast source: National Weather Service (api.weather.gov) for Fort Defiance (35.748, -109.068). Updated through the day.
Growing snapshot for Fort Defiance
Last spring frost
May 29
First fall frost
Sep 28
Growing season
121 days
Hardiness zone
6b
More local growing data for Fort Defiance: nearby ZIP 86515 weather · frost dates · planting calendar · Arizona frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Window Rock Ap, Az (5.5 mi from Fort Defiance). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.