San Tan Valley, AZ Weather & Growing Conditions
Overnight
75°F
Clear
Clear, with a low around 75. East southeast wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 75°F | Clear | 5 mph ESE | 0% |
| Saturday | 100°F | Sunny | 5 mph SSW | 0% |
| Saturday Night | 73°F | Mostly Clear | 5 mph ENE | 0% |
| Sunday | 99°F | Sunny | 5 to 10 mph SSE | 0% |
| Sunday Night | 76°F | Partly Cloudy | 5 mph E | 1% |
| Monday | 99°F | Mostly Sunny | 5 mph S | 1% |
| Monday Night | 76°F | Mostly Clear | 5 mph ESE | 6% |
| Tuesday | 99°F | Sunny | 5 mph SSE | 5% |
| Tuesday Night | 77°F | Mostly Clear | 5 to 15 mph E | 6% |
| Wednesday | 100°F | Sunny then Slight Chance Showers And Thunderstorms | 5 to 15 mph ESE | 13% |
| Wednesday Night | 78°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph E | 19% |
| Thursday | 98°F | Slight Chance Showers And Thunderstorms | 5 to 15 mph ESE | 25% |
| Thursday Night | 78°F | Chance Showers And Thunderstorms | 10 to 15 mph E | 25% |
| Friday | 98°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 5 to 15 mph SSE | 19% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for San Tan Valley, AZ
Last spring frost
Feb 1
First fall frost
Dec 11
Growing season
315 days
Hardiness zone
9b
Explore more for San Tan Valley, AZ: full frost dates · planting calendar · Arizona frost dates
Climate data from the nearest NOAA station, Chandler Heights, Az (11.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.