St. Johns, AZ Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for St. Johns, a city in Apache County, Arizona.
Tonight
36°F
Partly Cloudy
Partly cloudy, with a low around 36. South wind around 3 mph.
7-day forecast for St. Johns
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 36°F | Partly Cloudy | 3 mph S | 0% |
| Wednesday | 67°F | Sunny | 3 to 23 mph SW | 2% |
| Wednesday Night | 36°F | Mostly Clear | 3 to 13 mph SW | 2% |
| Thursday | 63°F | Sunny | 2 to 7 mph NE | 0% |
| Thursday Night | 38°F | Partly Cloudy | 5 mph S | 0% |
| Friday | 63°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 2 to 8 mph NE | 12% |
| Friday Night | 37°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 0 to 6 mph NW | 12% |
| Saturday | 64°F | Sunny | 0 to 8 mph N | 3% |
| Saturday Night | 31°F | Clear | 5 mph E | 0% |
| Sunday | 66°F | Sunny | 3 to 7 mph NE | 2% |
| Sunday Night | 33°F | Partly Cloudy | 3 mph S | 2% |
| Monday | 67°F | Mostly Sunny | 3 mph SW | 8% |
| Monday Night | 34°F | Partly Cloudy | 2 mph SW | 4% |
| Tuesday | 67°F | Mostly Sunny | 0 to 5 mph SW | 7% |
Forecast source: National Weather Service (api.weather.gov) for St. Johns (34.500, -109.377). Updated through the day.
Growing snapshot for St. Johns
Last spring frost
May 3
First fall frost
Oct 10
Growing season
160 days
Hardiness zone
6b
More local growing data for St. Johns: nearby ZIP 85936 weather · frost dates · planting calendar · Arizona frost dates
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Climate data from the nearest NOAA station, St Johns Industrial Ap, Az (7.2 mi from St. Johns). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.