July is one of the warmer months of the year in Tucson, with average highs near 35.9°C and lows around 22.9°C (mean 29.4°C). It is a relatively wet time of year, averaging 80 mm of rainfall and 42% relative humidity across the period.
July is one of the warmer months of the year in Tucson. Across 45 years of records, the warmest July in Tucson was 2023 — when the month averaged 33.5°C — while the coldest was 1984 at 26.8°C. Typical July days reach 35.9°C with nights near 22.9°C. The long-term trend is warming, about 0.4°C per decade.
July is a relatively wet time of year in Tucson, averaging 80 mm of rainfall. The wettest July on record was 1990 with 181 mm, while the driest was 1995 at 21 mm.
Relative humidity in Tucson during July averages 42%. The most humid July was 1984 at 61%, and the least humid was 2023 at 26%.
July receives about 6.9 kWh/m²/day of solar energy in Tucson. The sunniest Julys were 2005 and 2016 at 7.6 kWh/m²/day, and the cloudiest were 1999 and 2001 at 6.2.
Average wind speed in Tucson during July is 2.1 m/s. The windiest July was 1987 at 2.7 m/s, while the calmest was 1984 at 1.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 28.7°C | 29.1°C | 29.7°C | 29.2°C | 30.8°C | +2.1°C |
| Avg High | 35.2°C | 35.9°C | 36.3°C | 35.3°C | 37.5°C | +2.3°C |
| Avg Low | 22.2°C | 22.3°C | 23.2°C | 23.1°C | 24.1°C | +1.9°C |
| Avg Rain | 89 mm | 70 mm | 85 mm | 81 mm | 73 mm | -16 mm |
July temperatures in Tucson have risen by about 2.2°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 16.1°C (1982) to a record high of 45.4°C (1995).
Rainfall in July is a relatively wet time of year, averaging 80 mm, with a wettest year of 181 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.3°C per decade while lows rose 0.5°C per decade, narrowing the gap between day and night.
A quieter season to visit Tucson
If your dates are flexible, the more temperate months of October and May tend to be the most comfortable for visiting Tucson. That said, July — with days averaging 35.9°C and nights around 22.9°C (mean 29.4°C) and higher rainfall (80 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 | 37.1°C | 30.1°C | 23.1°C | 43.4°C | 18.9°C | 83 mm | 37% | 2.3 m/s | 7.3 |
| 2024 | 39.0°C | 31.8°C | 24.6°C | 43.7°C | 22.9°C | 70 mm | 39% | 2.2 m/s | 7.4 |
| 2023 🔥 | 41.2°C | 33.5°C | 25.9°C | 43.9°C | 22.8°C | 25 mm | 26% | 2.3 m/s | 7.5 |
| 2022 | 36.4°C | 30.0°C | 23.6°C | 41.6°C | 20.0°C | 75 mm | 41% | 2.1 m/s | 6.7 |
| 2021 | 33.3°C | 28.1°C | 23.0°C | 40.5°C | 18.8°C | 158 mm | 56% | 1.7 m/s | 6.3 |
| 2020 | 38.1°C | 31.2°C | 24.4°C | 43.2°C | 19.0°C | 29 mm | 33% | 2.3 m/s | 7.1 |
| 2019 | 37.2°C | 30.5°C | 23.9°C | 41.0°C | 20.4°C | 44 mm | 34% | 2.4 m/s | 7.2 |
| 2018 | 36.1°C | 29.9°C | 23.8°C | 42.9°C | 18.3°C | 69 mm | 44% | 2 m/s | 6.9 |
| 2017 | 34.0°C | 28.6°C | 23.1°C | 43.6°C | 20.8°C | 137 mm | 52% | 2 m/s | 6.8 |
| 2016 | 37.2°C | 30.4°C | 23.6°C | 40.6°C | 21.2°C | 62 mm | 39% | 2.2 m/s | 7.6 |
| 2015 | 33.7°C | 27.9°C | 22.1°C | 37.7°C | 18.8°C | 64 mm | 48% | 2.2 m/s | 6.4 |
| 2014 | 34.6°C | 28.7°C | 22.9°C | 40.0°C | 21.0°C | 78 mm | 46% | 1.9 m/s | 6.9 |
| 2013 | 34.6°C | 28.7°C | 22.8°C | 40.7°C | 21.1°C | 78 mm | 48% | 2.1 m/s | 6.6 |
| 2012 | 34.0°C | 28.2°C | 22.3°C | 39.4°C | 19.1°C | 95 mm | 48% | 2.1 m/s | 6.5 |
| 2011 | 35.8°C | 29.3°C | 22.9°C | 43.3°C | 16.7°C | 69 mm | 42% | 2.2 m/s | 7 |
| 2010 | 35.7°C | 29.7°C | 23.7°C | 41.6°C | 19.4°C | 117 mm | 41% | 2.1 m/s | 6.6 |
| 2009 | 36.4°C | 29.9°C | 23.4°C | 41.0°C | 21.3°C | 79 mm | 43% | 2 m/s | 7.1 |
| 2008 | 33.4°C | 27.9°C | 22.4°C | 39.2°C | 19.6°C | 132 mm | 52% | 1.7 m/s | 6.7 |
| 2007 | 35.4°C | 29.5°C | 23.5°C | 42.4°C | 20.0°C | 125 mm | 45% | 1.9 m/s | 6.8 |
| 2006 | 35.6°C | 29.5°C | 23.4°C | 42.0°C | 19.5°C | 141 mm | 47% | 2.1 m/s | 6.7 |
| 2005 | 38.9°C | 31.5°C | 24.2°C | 42.9°C | 21.7°C | 63 mm | 32% | 2.4 m/s | 7.6 |
| 2004 | 36.3°C | 29.5°C | 22.6°C | 39.4°C | 17.6°C | 57 mm | 36% | 2.3 m/s | 7.4 |
| 2003 | 37.6°C | 30.4°C | 23.3°C | 42.6°C | 19.9°C | 85 mm | 37% | 2.3 m/s | 7.5 |
| 2002 | 36.4°C | 29.6°C | 22.7°C | 41.5°C | 18.9°C | 58 mm | 38% | 2.3 m/s | 6.6 |
| 2001 | 35.2°C | 29.0°C | 22.9°C | 43.8°C | 20.8°C | 78 mm | 45% | 2 m/s | 6.2 |
| 2000 | 37.4°C | 30.3°C | 23.1°C | 41.4°C | 19.9°C | 34 mm | 34% | 2 m/s | 7.4 |
| 1999 | 33.5°C | 27.7°C | 21.9°C | 40.9°C | 19.8°C | 128 mm | 52% | 2 m/s | 6.2 |
| 1998 | 36.3°C | 29.7°C | 23.2°C | 42.3°C | 20.5°C | 102 mm | 44% | 2 m/s | 7 |
| 1997 | 37.5°C | 30.0°C | 22.6°C | 42.8°C | 18.5°C | 22 mm | 28% | 2.4 m/s | 7.3 |
| 1996 | 36.2°C | 29.7°C | 23.2°C | 40.7°C | 20.2°C | 74 mm | 45% | 2 m/s | 6.9 |
| 1995 | 38.3°C | 30.5°C | 22.7°C | 45.4°C | 18.4°C | 21 mm | 28% | 2.1 m/s | 7.3 |
| 1994 | 37.4°C | 30.0°C | 22.7°C | 42.3°C | 20.0°C | 35 mm | 33% | 2.5 m/s | 7.4 |
| 1993 | 35.2°C | 28.3°C | 21.3°C | 40.6°C | 17.2°C | 39 mm | 42% | 2.5 m/s | 7.3 |
| 1992 | 35.2°C | 28.5°C | 21.7°C | 42.2°C | 17.2°C | 64 mm | 41% | 2.2 m/s | 6.8 |
| 1991 | 36.5°C | 29.2°C | 21.8°C | 41.2°C | 19.9°C | 37 mm | 33% | 2.3 m/s | 6.7 |
| 1990 🌧️ | 33.3°C | 27.5°C | 21.7°C | 42.4°C | 19.0°C | 181 mm | 57% | 1.9 m/s | 6.5 |
| 1989 | 36.6°C | 29.9°C | 23.3°C | 43.1°C | 20.9°C | 65 mm | 39% | 2.1 m/s | 7.2 |
| 1988 | 34.9°C | 28.8°C | 22.7°C | 39.8°C | 20.3°C | 109 mm | 46% | 2 m/s | 6.5 |
| 1987 | 36.8°C | 29.0°C | 21.1°C | 40.9°C | 18.4°C | 41 mm | 31% | 2.7 m/s | 7.2 |
| 1986 | 34.3°C | 28.0°C | 21.7°C | 41.4°C | 19.2°C | 70 mm | 45% | 2.1 m/s | 6.7 |
| 1985 | 36.5°C | 29.5°C | 22.5°C | 42.5°C | 19.1°C | 86 mm | 40% | 2.4 m/s | 7.1 |
| 1984 ❄️ | 32.1°C | 26.8°C | 21.5°C | 39.0°C | 19.4°C | 153 mm | 61% | 1.6 m/s | 6.8 |
| 1983 | 35.9°C | 29.1°C | 22.3°C | 43.9°C | 16.7°C | 83 mm | 42% | 2.3 m/s | — |
| 1982 | 35.1°C | 28.4°C | 21.8°C | 41.2°C | 16.1°C | 72 mm | 42% | 2.1 m/s | — |
| 1981 | 34.8°C | 28.9°C | 23.0°C | 41.5°C | 20.6°C | 125 mm | 50% | 1.7 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 35.9°C with lows near 22.9°C (mean 29.4°C), based on 45 years of NASA POWER data.
July averages 80 mm of rainfall in Tucson, a relatively wet time of year. The wettest on record was 181 mm in 1990.
The hottest July reached 45.4°C in 1995. The coldest dipped to 16.1°C in 1982.
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 34.9°C to 37.4°C and overnight lows from 22.2°C to 24°C over the same span.
July is one of the warmer months of the year in Tucson and a relatively wet time of year, so plan for around 35.9°C daytime highs and 22.9°C at night.
Not quite — July is the 12th coolest month in Tucson, averaging 29.4°C.
For July in Tucson, pack light, breathable clothing and sun protection, with typical highs of 35.9°C and lows of 22.9°C. Bring an umbrella or light rain jacket too.
Relative humidity in July averages 42% — relatively dry.
Average wind speed in July is 2.1 m/s. The windiest July on record averaged 2.7 m/s (1987).
The wettest July on record was 1990 with 181 mm. On average, July sees 80 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 Tucson 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.
