July is one of the warmer months of the year in San Tan Valley, with average highs near 38.5°C and lows around 24.8°C (mean 31.7°C). It is a relatively wet time of year, averaging 49 mm of rainfall and 35% relative humidity across the period.
July is one of the warmer months of the year in San Tan Valley. Across 45 years of records, the warmest July in San Tan Valley was 2023 — when the month averaged 35.4°C — while the coldest was 1984 at 29.2°C. Typical July days reach 38.5°C with nights near 24.8°C. The long-term trend is warming, about 0.5°C per decade.
July is a relatively wet time of year in San Tan Valley, averaging 49 mm of rainfall. The wettest July on record was 2021 with 119 mm, while the driest was 2020 at 7 mm.
Relative humidity in San Tan Valley during July averages 35%. The most humid July was 1984 at 54%, and the least humid was 2023 at 22%.
July receives about 7.4 kWh/m²/day of solar energy in San Tan Valley. The sunniest Julys were 2005 and 2016 at 7.9 kWh/m²/day, and the cloudiest was 2021 at 6.6.
Average wind speed in San Tan Valley during July is 2.1 m/s. The windiest Julys were 1987 and 1993 at 2.4 m/s, while the calmest was 2021 at 1.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 30.9°C | 31.1°C | 32.1°C | 31.8°C | 33.0°C | +2.1°C |
| Avg High | 37.8°C | 38.2°C | 38.9°C | 38.3°C | 39.9°C | +2.1°C |
| Avg Low | 23.9°C | 24.0°C | 25.2°C | 25.2°C | 26.1°C | +2.2°C |
| Avg Rain | 57 mm | 43 mm | 51 mm | 46 mm | 50 mm | -7 mm |
July temperatures in San Tan Valley have risen by about 2.2°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 17.8°C (1992) to a record high of 48.3°C (1995).
Rainfall in July is a relatively wet time of year, averaging 49 mm, with a wettest year of 119 mm.
A quieter season to visit San Tan Valley
If your dates are flexible, the more temperate months of October and May tend to be the most comfortable for visiting San Tan Valley. That said, July — with days averaging 38.5°C and nights around 24.8°C (mean 31.7°C) and moderate rainfall (49 mm) — can still be rewarding for travellers who don't mind the warmth, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 38.5°C | 31.7°C | 24.8°C | 44.7°C | 21.0°C | 83 mm | 34% | 1.9 m/s | 7.6 |
| 2024 | 41.8°C | 34.3°C | 26.9°C | 45.8°C | 24.6°C | 26 mm | 30% | 2.2 m/s | 7.7 |
| 2023 🔥 | 42.9°C | 35.4°C | 27.8°C | 45.5°C | 23.8°C | 13 mm | 22% | 2.3 m/s | 7.8 |
| 2022 | 39.2°C | 32.5°C | 25.8°C | 44.0°C | 23.2°C | 51 mm | 35% | 2.1 m/s | 7.3 |
| 2021 🌧️ | 36.2°C | 30.5°C | 24.9°C | 43.1°C | 20.6°C | 119 mm | 49% | 1.7 m/s | 6.6 |
| 2020 | 40.8°C | 33.6°C | 26.4°C | 45.1°C | 19.9°C | 7 mm | 26% | 2.2 m/s | 7.7 |
| 2019 | 40.2°C | 33.1°C | 25.9°C | 44.0°C | 21.5°C | 23 mm | 25% | 2.3 m/s | 7.8 |
| 2018 | 39.0°C | 32.5°C | 26.1°C | 44.9°C | 19.8°C | 35 mm | 36% | 2.2 m/s | 7.3 |
| 2017 | 37.4°C | 31.3°C | 25.2°C | 45.7°C | 22.9°C | 64 mm | 44% | 1.9 m/s | 7.3 |
| 2016 | 40.1°C | 33.0°C | 25.9°C | 42.8°C | 22.9°C | 27 mm | 30% | 2 m/s | 7.9 |
| 2015 | 37.1°C | 30.9°C | 24.7°C | 40.5°C | 21.0°C | 21 mm | 36% | 2.2 m/s | 7.2 |
| 2014 | 37.8°C | 31.3°C | 24.7°C | 43.5°C | 22.0°C | 47 mm | 38% | 1.9 m/s | 7.3 |
| 2013 | 37.2°C | 31.0°C | 24.9°C | 42.4°C | 22.5°C | 55 mm | 43% | 2 m/s | 6.9 |
| 2012 | 37.0°C | 30.6°C | 24.2°C | 42.0°C | 20.6°C | 71 mm | 43% | 2.1 m/s | 7 |
| 2011 | 38.7°C | 31.8°C | 25.0°C | 45.5°C | 19.2°C | 50 mm | 35% | 2.1 m/s | 7.6 |
| 2010 | 38.2°C | 32.0°C | 25.8°C | 43.5°C | 21.2°C | 69 mm | 37% | 2.1 m/s | 7.1 |
| 2009 | 39.0°C | 32.2°C | 25.4°C | 42.8°C | 23.2°C | 57 mm | 36% | 1.9 m/s | 7.5 |
| 2008 | 36.4°C | 30.4°C | 24.3°C | 42.0°C | 20.7°C | 82 mm | 46% | 1.8 m/s | 7.3 |
| 2007 | 37.7°C | 31.6°C | 25.4°C | 44.2°C | 21.4°C | 65 mm | 38% | 1.9 m/s | 7.3 |
| 2006 | 37.9°C | 31.8°C | 25.7°C | 44.6°C | 21.8°C | 102 mm | 42% | 2.1 m/s | 6.9 |
| 2005 | 41.1°C | 33.5°C | 25.8°C | 44.4°C | 23.5°C | 34 mm | 26% | 2.3 m/s | 7.9 |
| 2004 | 39.0°C | 31.7°C | 24.4°C | 42.8°C | 19.3°C | 34 mm | 29% | 2.2 m/s | 7.8 |
| 2003 | 40.3°C | 32.9°C | 25.5°C | 45.6°C | 22.2°C | 37 mm | 29% | 2.3 m/s | 7.7 |
| 2002 | 39.1°C | 32.2°C | 25.3°C | 43.8°C | 21.7°C | 34 mm | 31% | 2.2 m/s | 7.3 |
| 2001 | 38.2°C | 31.6°C | 25.0°C | 46.0°C | 21.9°C | 52 mm | 36% | 1.9 m/s | 7 |
| 2000 | 40.1°C | 32.6°C | 25.0°C | 44.0°C | 22.4°C | 15 mm | 25% | 2.2 m/s | 7.7 |
| 1999 | 36.3°C | 30.1°C | 23.9°C | 43.0°C | 21.2°C | 84 mm | 47% | 1.9 m/s | 6.7 |
| 1998 | 38.8°C | 32.0°C | 25.2°C | 45.0°C | 22.5°C | 51 mm | 37% | 2.1 m/s | 7.6 |
| 1997 | 39.5°C | 31.5°C | 23.6°C | 44.4°C | 19.6°C | 13 mm | 23% | 2.2 m/s | 7.8 |
| 1996 | 38.6°C | 31.9°C | 25.2°C | 42.8°C | 22.5°C | 56 mm | 39% | 1.9 m/s | 7.5 |
| 1995 | 40.3°C | 32.3°C | 24.3°C | 48.3°C | 19.7°C | 9 mm | 22% | 2.1 m/s | 7.6 |
| 1994 | 39.4°C | 31.8°C | 24.3°C | 43.5°C | 20.6°C | 31 mm | 28% | 2.2 m/s | 7.6 |
| 1993 | 37.8°C | 30.7°C | 23.6°C | 42.8°C | 18.8°C | 15 mm | 32% | 2.4 m/s | 7.8 |
| 1992 | 36.7°C | 29.8°C | 22.8°C | 42.5°C | 17.8°C | 54 mm | 38% | 2 m/s | 7.2 |
| 1991 | 38.4°C | 30.9°C | 23.3°C | 42.1°C | 22.0°C | 27 mm | 29% | 2.1 m/s | 7.2 |
| 1990 | 36.3°C | 30.1°C | 23.8°C | 44.7°C | 20.4°C | 93 mm | 48% | 1.9 m/s | 7 |
| 1989 | 39.1°C | 32.1°C | 25.1°C | 44.8°C | 22.9°C | 45 mm | 33% | 2 m/s | 7.4 |
| 1988 | 37.9°C | 31.3°C | 24.7°C | 41.7°C | 22.3°C | 55 mm | 38% | 2 m/s | 6.9 |
| 1987 | 38.9°C | 30.8°C | 22.6°C | 43.2°C | 18.8°C | 25 mm | 26% | 2.4 m/s | 7.5 |
| 1986 | 36.8°C | 30.0°C | 23.2°C | 43.5°C | 20.4°C | 48 mm | 38% | 2.1 m/s | 7.3 |
| 1985 | 38.7°C | 31.4°C | 24.2°C | 45.4°C | 20.1°C | 59 mm | 35% | 2.1 m/s | 7.5 |
| 1984 ❄️ | 34.9°C | 29.2°C | 23.5°C | 41.0°C | 21.9°C | 106 mm | 54% | 1.8 m/s | 7 |
| 1983 | 38.5°C | 31.2°C | 24.0°C | 45.3°C | 18.9°C | 49 mm | 36% | 2.3 m/s | — |
| 1982 | 37.3°C | 30.4°C | 23.4°C | 43.1°C | 19.1°C | 54 mm | 36% | 2.1 m/s | — |
| 1981 | 37.8°C | 31.3°C | 24.8°C | 43.6°C | 22.5°C | 69 mm | 41% | 1.8 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 38.5°C with lows near 24.8°C (mean 31.7°C), based on 45 years of NASA POWER data.
July averages 49 mm of rainfall in San Tan Valley, a relatively wet time of year. The wettest on record was 119 mm in 2021.
The hottest July reached 48.3°C in 1995. The coldest dipped to 17.8°C in 1992.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 2.2°C. Daytime highs moved from 37.4°C to 39.7°C and overnight lows from 24°C to 26°C over the same span.
July is one of the warmer months of the year in San Tan Valley and a relatively wet time of year, so plan for around 38.5°C daytime highs and 24.8°C at night.
Not quite — July is the 12th coolest month in San Tan Valley, averaging 31.7°C.
For July in San Tan Valley, pack light, breathable clothing and sun protection, with typical highs of 38.5°C and lows of 24.8°C.
Relative humidity in July averages 35% — relatively dry.
Average wind speed in July is 2.1 m/s. The windiest July on record averaged 2.4 m/s (1987).
The wettest July on record was 2021 with 119 mm. On average, July sees 49 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in San Tan Valley behaves each July, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for July specifically, along with year-by-year records and how the month has changed over the decades.
