Fort Defiance, AZ Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fort Defiance, a community in Mckinley County, Arizona.
Overnight
60°F
Clear
Clear. Low around 60, with temperatures rising to around 63 overnight. Northwest wind around 7 mph.
7-day forecast for Fort Defiance
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 60°F | Clear | 7 mph NW | 0% |
| Tuesday | 94°F | Sunny | 7 to 12 mph NW | 1% |
| Tuesday Night | 59°F | Mostly Clear | 2 to 12 mph NW | 1% |
| Wednesday | 93°F | Sunny | 2 to 8 mph NW | 2% |
| Wednesday Night | 59°F | Mostly Clear | 1 to 6 mph W | 1% |
| Thursday | 92°F | Slight Chance Showers And Thunderstorms | 0 to 6 mph NW | 16% |
| Thursday Night | 58°F | Mostly Clear | 1 to 6 mph NW | 0% |
| Friday | 93°F | Sunny | 0 to 7 mph N | 5% |
| Friday Night | 58°F | Mostly Clear | 0 to 5 mph S | 0% |
| Saturday | 93°F | Slight Chance Showers And Thunderstorms | 0 to 6 mph SW | 18% |
| Saturday Night | 59°F | Partly Cloudy | 1 to 7 mph SW | 3% |
| Sunday | 91°F | Chance Showers And Thunderstorms | 0 to 5 mph W | 27% |
| Sunday Night | 57°F | Slight Chance Showers And Thunderstorms then Mostly Cloudy | 2 to 7 mph W | 13% |
| Monday | 89°F | Chance Showers And Thunderstorms | 1 to 7 mph W | 38% |
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 Aug 4, 2026.