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.
Overnight
83°F
Partly Cloudy
Partly cloudy. Low around 83, with temperatures rising to around 87 overnight. Southeast wind around 5 mph.
7-day forecast for San Tan Valley
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 83°F | Partly Cloudy | 5 mph SE | 3% |
| Tuesday | 108°F | Sunny | 5 to 15 mph W | 3% |
| Tuesday Night | 84°F | Patchy Blowing Dust | 0 to 20 mph SSW | 6% |
| Wednesday | 105°F | Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph W | 11% |
| Wednesday Night | 82°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 0 to 10 mph E | 11% |
| Thursday | 107°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 10 mph WSW | 12% |
| Thursday Night | 83°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph SW | 12% |
| Friday | 108°F | Sunny | 5 mph SW | 8% |
| Friday Night | 83°F | Partly Cloudy | 5 mph SSW | 8% |
| Saturday | 109°F | Sunny then Slight Chance Showers And Thunderstorms | 5 mph SW | 13% |
| Saturday Night | 84°F | Slight Chance Showers And Thunderstorms | 5 mph S | 13% |
| Sunday | 107°F | Chance Showers And Thunderstorms | 5 mph SSW | 31% |
| Sunday Night | 81°F | Chance Showers And Thunderstorms | 5 mph SSW | 31% |
| Monday | 103°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 39% |
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 Aug 4, 2026.