San Tan Valley, AZ Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for San Tan Valley, a community in Pinal County, Arizona.
Today
100°F
Sunny
Sunny, with a high near 100. Southwest wind around 5 mph.
7-day forecast for San Tan Valley
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 100°F | Sunny | 5 mph SW | 0% |
| Tonight | 73°F | Mostly Clear | 0 to 5 mph SW | 0% |
| Sunday | 99°F | Sunny | 5 mph SSE | 0% |
| Sunday Night | 75°F | Partly Cloudy | 5 mph E | 1% |
| Monday | 100°F | Mostly Sunny | 5 mph S | 1% |
| Monday Night | 75°F | Mostly Clear | 5 mph SE | 6% |
| Tuesday | 100°F | Sunny | 0 to 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 | 14% |
| Wednesday Night | 78°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph E | 18% |
| Thursday | 99°F | Slight Chance Showers And Thunderstorms | 5 to 15 mph E | 24% |
| Thursday Night | 77°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph E | 24% |
| Friday | 99°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 5 to 15 mph SSE | 18% |
| Friday Night | 78°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 5 to 15 mph ENE | 11% |
Forecast source: National Weather Service (api.weather.gov) for San Tan Valley (33.179, -111.563). Updated through the day.
Growing snapshot for San Tan Valley
Last spring frost
Feb 1
First fall frost
Dec 11
Growing season
315 days
Hardiness zone
9b
More local growing data for San Tan Valley: nearby ZIP 85143 weather · frost dates · planting calendar · Arizona frost dates
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Lower Santan Village
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Climate data from the nearest NOAA station, Chandler Heights, Az (10 mi from San Tan Valley). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.