Climate averages 1991–2020
San Tan Valley weather
in July.
A very hot, fairly dry month: the warmest and the 6th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a very hot month in San Tan Valley: daytime highs average 39.3°C and nights cool to about 26.5°C. By daytime temperature it is the warmest month of the year.
Expect about 21 mm of rain on roughly 4 days, which makes July a fairly dry month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 07 min on an average July day.
The nearest other city in this atlas is Chandler (32 km away). In July its highs average 40.7°C, 1.4°C warmer than San Tan Valley, with 19 mm of rain.
Among the 498 cities listed in the United States, San Tan Valley ranks joint 13th of 498 for the warmest July highs and joint 148th of 498 for the driest July (rainfall, lowest first). The mean July high of those 498 cities is 30.3°C; San Tan Valley is 9.0°C warmer than that mean.
From July to August, average highs fall by 0.9°C to 38.4°C, and monthly rainfall rises from 21 mm to 27 mm.
The annual picture
July in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
San Tan Valley climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 18.2°C4.9°C | 4.9°C | 38 | 4.2 | 10.210 h |
| February | 19.8°C6.3°C | 6.3°C | 41 | 4.4 | 11.011 h |
| March | 23.8°C8.9°C | 8.9°C | 27 | 3.0 | 12.012 h |
| April | 28.2°C12.5°C | 12.5°C | 8.4 | 1.4 | 13.013 h |
| May | 33.2°C17.4°C | 17.4°C | 4.1 | 0.7 | 13.914 h |
| June | 38.7°C22.6°C | 22.6°C | 2.0 | 0.6 | 14.314 h |
| July, selected | 39.3°C26.5°C | 26.5°C | 21 | 3.7 | 14.114 h |
| August | 38.4°C26.2°C | 26.2°C | 27 | 4.9 | 13.413 h |
| September | 35.9°C22.7°C | 22.7°C | 26 | 3.2 | 12.412 h |
| October | 30.0°C15.9°C | 15.9°C | 18 | 2.4 | 11.411 h |
| November | 23.3°C9.6°C | 9.6°C | 19 | 2.4 | 10.510 h |
| December | 17.6°C4.8°C | 4.8°C | 34 | 4.3 | 10.010 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
July in nearby cities
- Chandler in JulyUnited States · 32 kmHigh 40.7°C · Low 27.2°C · 19 mm rain
- Mesa in JulyUnited States · 38 kmHigh 40.3°C · Low 27.3°C · 18 mm rain
- Tempe in JulyUnited States · 43 kmHigh 40.5°C · Low 27.8°C · 19 mm rain
- Scottsdale in JulyUnited States · 49 kmHigh 40.3°C · Low 27.7°C · 19 mm rain
- Phoenix in JulyUnited States · 58 kmHigh 40.6°C · Low 27.9°C · 19 mm rain
- Glendale (Arizona), United States in JulyUnited States · 72 kmHigh 40.6°C · Low 28.1°C · 18 mm rain
- Peoria (Arizona), United States in JulyUnited States · 79 kmHigh 40.4°C · Low 28.0°C · 18 mm rain
- Avondale in JulyUnited States · 81 kmHigh 41.1°C · Low 28.3°C · 18 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for San Tan Valley) is explained once on the San Tan Valley year overview and on the Sources, method and limits page.