July is one of the warmer months of the year in Mesa, with average highs near 40.6°C and lows around 26.5°C (mean 33.6°C). It is a relatively wet time of year, averaging 35 mm of rainfall and 30% relative humidity across the period.
July is one of the warmer months of the year in Mesa. Across 45 years of records, the warmest July in Mesa was 2023 — when the month averaged 36.7°C — while the coldest were 1984 and 1992 at 31.4°C. Typical July days reach 40.6°C with nights near 26.5°C. The long-term trend is warming, about 0.5°C per decade.
July is a relatively wet time of year in Mesa, averaging 35 mm of rainfall. The wettest July on record was 2021 with 105 mm, while the driest was 1993 at 5 mm.
Relative humidity in Mesa during July averages 30%. The most humid July was 1984 at 48%, and the least humid was 2023 at 19%.
July receives about 7.4 kWh/m²/day of solar energy in Mesa. 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 Mesa during July is 2 m/s. The windiest Julys were 1991, 1993 and 2023, among others at 2.3 m/s, while the calmest were 2008 and 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 | 32.8°C | 32.9°C | 34.0°C | 33.7°C | 34.8°C | +2°C |
| Avg High | 39.8°C | 40.1°C | 41.0°C | 40.5°C | 42.1°C | +2.3°C |
| Avg Low | 25.7°C | 25.6°C | 27.0°C | 26.9°C | 27.6°C | +1.9°C |
| Avg Rain | 40 mm | 32 mm | 31 mm | 35 mm | 36 mm | -4 mm |
July temperatures in Mesa have risen by about 1.9°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 18°C (1992) to a record high of 50.6°C (1995).
Rainfall in July is a relatively wet time of year, averaging 35 mm, with a wettest year of 105 mm.
A quieter season to visit Mesa
If your dates are flexible, the more temperate months of April and October tend to be the most comfortable for visiting Mesa. That said, July — with days averaging 40.6°C and nights around 26.5°C (mean 33.6°C) and moderate rainfall (35 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 | 41.4°C | 34.1°C | 26.7°C | 47.3°C | 23.7°C | 29 mm | 24% | 2 m/s | 7.6 |
| 2024 | 43.7°C | 35.9°C | 28.1°C | 46.7°C | 26.0°C | 21 mm | 26% | 2.1 m/s | 7.7 |
| 2023 🔥 | 44.6°C | 36.7°C | 28.9°C | 47.5°C | 24.3°C | 8 mm | 19% | 2.3 m/s | 7.8 |
| 2022 | 40.9°C | 34.1°C | 27.3°C | 45.6°C | 24.9°C | 43 mm | 31% | 2 m/s | 7.3 |
| 2021 🌧️ | 38.7°C | 32.7°C | 26.7°C | 44.9°C | 22.1°C | 105 mm | 43% | 1.7 m/s | 6.6 |
| 2020 | 43.2°C | 35.5°C | 27.8°C | 47.4°C | 20.5°C | 8 mm | 21% | 2.1 m/s | 7.7 |
| 2019 | 42.1°C | 34.6°C | 27.0°C | 45.9°C | 22.1°C | 20 mm | 22% | 2.2 m/s | 7.8 |
| 2018 | 40.9°C | 34.1°C | 27.4°C | 46.6°C | 21.1°C | 38 mm | 34% | 2 m/s | 7.3 |
| 2017 | 39.7°C | 33.4°C | 27.1°C | 47.2°C | 24.4°C | 65 mm | 39% | 1.8 m/s | 7.3 |
| 2016 | 42.1°C | 34.8°C | 27.4°C | 45.1°C | 23.8°C | 21 mm | 25% | 2 m/s | 7.9 |
| 2015 | 39.4°C | 32.9°C | 26.4°C | 42.8°C | 21.6°C | 20 mm | 30% | 2.1 m/s | 7.2 |
| 2014 | 40.7°C | 33.8°C | 27.0°C | 45.8°C | 23.7°C | 25 mm | 30% | 2 m/s | 7.3 |
| 2013 | 39.5°C | 33.2°C | 26.8°C | 44.1°C | 23.4°C | 35 mm | 36% | 1.9 m/s | 6.9 |
| 2012 | 39.4°C | 32.7°C | 26.1°C | 44.9°C | 22.6°C | 43 mm | 36% | 2 m/s | 7 |
| 2011 | 40.9°C | 33.7°C | 26.6°C | 47.4°C | 20.4°C | 35 mm | 30% | 2 m/s | 7.6 |
| 2010 | 40.2°C | 33.9°C | 27.6°C | 45.4°C | 22.2°C | 47 mm | 33% | 2 m/s | 7.1 |
| 2009 | 41.7°C | 34.7°C | 27.7°C | 45.3°C | 25.8°C | 25 mm | 29% | 2 m/s | 7.5 |
| 2008 | 39.0°C | 32.7°C | 26.4°C | 44.3°C | 23.6°C | 52 mm | 39% | 1.7 m/s | 7.3 |
| 2007 | 39.6°C | 33.2°C | 26.8°C | 45.2°C | 23.1°C | 48 mm | 35% | 1.9 m/s | 7.3 |
| 2006 | 40.2°C | 34.1°C | 27.9°C | 46.3°C | 24.2°C | 46 mm | 36% | 2 m/s | 6.9 |
| 2005 | 42.7°C | 35.0°C | 27.3°C | 46.8°C | 23.8°C | 25 mm | 24% | 2.1 m/s | 7.9 |
| 2004 | 41.0°C | 33.6°C | 26.1°C | 44.7°C | 20.5°C | 24 mm | 25% | 2.1 m/s | 7.8 |
| 2003 | 42.3°C | 34.9°C | 27.4°C | 46.7°C | 23.9°C | 22 mm | 25% | 2.2 m/s | 7.7 |
| 2002 | 40.9°C | 34.0°C | 27.1°C | 45.0°C | 23.5°C | 26 mm | 27% | 2.1 m/s | 7.3 |
| 2001 | 40.3°C | 33.6°C | 26.8°C | 47.4°C | 21.8°C | 36 mm | 29% | 2 m/s | 7 |
| 2000 | 42.0°C | 34.3°C | 26.6°C | 45.6°C | 23.8°C | 8 mm | 20% | 2.1 m/s | 7.7 |
| 1999 | 38.3°C | 32.0°C | 25.7°C | 44.7°C | 22.8°C | 69 mm | 43% | 1.9 m/s | 6.7 |
| 1998 | 41.0°C | 33.9°C | 26.8°C | 47.3°C | 24.1°C | 34 mm | 32% | 2 m/s | 7.6 |
| 1997 | 41.2°C | 33.1°C | 25.0°C | 45.4°C | 21.0°C | 6 mm | 20% | 2.1 m/s | 7.8 |
| 1996 | 40.7°C | 33.9°C | 27.0°C | 44.9°C | 24.8°C | 46 mm | 34% | 1.9 m/s | 7.5 |
| 1995 | 41.9°C | 33.8°C | 25.7°C | 50.6°C | 19.7°C | 7 mm | 21% | 2.1 m/s | 7.6 |
| 1994 | 41.3°C | 33.6°C | 25.8°C | 44.9°C | 21.9°C | 24 mm | 25% | 2 m/s | 7.6 |
| 1993 | 39.8°C | 32.3°C | 24.8°C | 45.6°C | 19.4°C | 5 mm | 26% | 2.3 m/s | 7.8 |
| 1992 | 38.3°C | 31.4°C | 24.4°C | 44.0°C | 18.0°C | 55 mm | 35% | 1.9 m/s | 7.2 |
| 1991 | 40.4°C | 32.6°C | 24.8°C | 43.9°C | 22.9°C | 13 mm | 25% | 2.3 m/s | 7.2 |
| 1990 | 38.5°C | 32.2°C | 25.9°C | 45.7°C | 22.3°C | 63 mm | 42% | 1.8 m/s | 7 |
| 1989 | 41.2°C | 34.0°C | 26.8°C | 46.5°C | 23.2°C | 34 mm | 29% | 2 m/s | 7.4 |
| 1988 | 40.3°C | 33.6°C | 26.8°C | 43.7°C | 24.4°C | 35 mm | 32% | 2.1 m/s | 6.9 |
| 1987 | 40.4°C | 32.0°C | 23.7°C | 45.1°C | 19.1°C | 16 mm | 23% | 2.3 m/s | 7.5 |
| 1986 | 38.3°C | 31.5°C | 24.8°C | 44.8°C | 21.5°C | 47 mm | 35% | 2 m/s | 7.3 |
| 1985 | 40.8°C | 33.3°C | 25.9°C | 47.3°C | 22.4°C | 44 mm | 31% | 2 m/s | 7.5 |
| 1984 ❄️ | 37.1°C | 31.4°C | 25.7°C | 44.1°C | 24.0°C | 89 mm | 48% | 1.8 m/s | 7 |
| 1983 | 40.4°C | 33.1°C | 25.7°C | 46.0°C | 20.6°C | 25 mm | 30% | 2.3 m/s | — |
| 1982 | 39.3°C | 32.1°C | 24.9°C | 44.6°C | 19.3°C | 34 mm | 31% | 2 m/s | — |
| 1981 | 40.6°C | 33.9°C | 27.1°C | 45.8°C | 23.4°C | 37 mm | 33% | 2 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 40.6°C with lows near 26.5°C (mean 33.6°C), based on 45 years of NASA POWER data.
July averages 35 mm of rainfall in Mesa, a relatively wet time of year. The wettest on record was 105 mm in 2021.
The hottest July reached 50.6°C in 1995. The coldest dipped to 18°C in 1992.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 1.9°C. Daytime highs moved from 39.6°C to 41.9°C and overnight lows from 25.9°C to 27.5°C over the same span.
July is one of the warmer months of the year in Mesa and a relatively wet time of year, so plan for around 40.6°C daytime highs and 26.5°C at night.
Not quite — July is the 12th coolest month in Mesa, averaging 33.6°C.
For July in Mesa, pack light, breathable clothing and sun protection, with typical highs of 40.6°C and lows of 26.5°C.
Relative humidity in July averages 30% — relatively dry.
Average wind speed in July is 2 m/s. The windiest July on record averaged 2.3 m/s (1983).
The wettest July on record was 2021 with 105 mm. On average, July sees 35 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 Mesa 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.
