San Tan Valley, AZ Weather & Growing Conditions
Today
99°F
Sunny
Sunny, with a high near 99. South wind 0 to 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 99°F | Sunny | 0 to 5 mph S | 0% |
| Tonight | 72°F | Mostly Clear | 5 mph ENE | 0% |
| Sunday | 98°F | Sunny | 5 mph SSE | 0% |
| Sunday Night | 75°F | Partly Cloudy | 5 mph E | 1% |
| Monday | 99°F | Mostly Sunny | 5 mph S | 1% |
| Monday Night | 75°F | Mostly Clear | 5 mph ESE | 6% |
| Tuesday | 99°F | Sunny | 0 to 5 mph S | 5% |
| Tuesday Night | 76°F | Mostly Clear | 5 to 15 mph E | 5% |
| Wednesday | 100°F | Sunny then Slight Chance Showers And Thunderstorms | 5 to 15 mph ESE | 14% |
| 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 E | 23% |
| Thursday Night | 77°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph E | 23% |
| Friday | 98°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 5 to 15 mph SE | 18% |
| Friday Night | 77°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 5 to 15 mph ENE | 11% |
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 (10 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.