San Tan Valley, Arizona Weather
Heat hardens the dust. Day 76 of spring. Read this microseason across nine climate regions →
San Tan Valley weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Clear——104°69°—
- ThursdayJun 4Partly Cloudy——105°71°+1°
- FridayJun 5Clear——104°69°-1°
- SaturdayJun 6Overcast——102°75°-2°
- SundayJun 7Overcast——103°76°+1°
- MondayJun 8Overcast——99°72°-4°
- TuesdayJun 9Overcast——104°72°+5°
Ozone at AQI 70 — peak already passed at 1 PM under clear skies. AQI flat over the last 6 hours (within ±3 points). Levels should ease through evening.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 70 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
- Present
- AQI 70
- UV peak
- 5.4 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 70
PM × Wind × Precip
PM2.5 at 8.2 µg/m³, PM10 at 56.9 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.14
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- background
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
The higher the clouds, the finer the weather.
- Moonrise
- 4:57 AM
- Moonset
- 2:51 PM
- In sign
- ♑︎ Capricorn
Heat hardens the dust
San Tan Valley at a glance
- Today vs. normal: 22°F above the seasonal normal for this latitude
- Last frost: March 6 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Peak growing season
As of June 3, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
SPC Convective Outlook
Storm Prediction Center — San Tan Valley
SPC has placed San Tan Valley in the General Thunderstorms category for severe thunderstorms today.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWNONENo severe risk
- DAY 3NONENo severe risk
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.