August is one of the warmer months of the year in Tucson, with average highs near 35°C and lows around 22.4°C (mean 28.7°C). It is a relatively wet time of year, averaging 77 mm of rainfall and 48% relative humidity across the period.
August is one of the warmer months of the year in Tucson. Across 45 years of records, the warmest August in Tucson was 2020 — when the month averaged 32.1°C — while the coldest was 1990 at 25.5°C. Typical August days reach 35°C with nights near 22.4°C. The long-term trend is warming, about 0.5°C per decade.
August is a relatively wet time of year in Tucson, averaging 77 mm of rainfall. The wettest August on record was 1993 with 146 mm, while the driest was 2023 at 38 mm.
Relative humidity in Tucson during August averages 48%. The most humid August was 1984 at 64%, and the least humid was 2009 at 35%.
August receives about 6.4 kWh/m²/day of solar energy in Tucson. The sunniest August was 2017 at 7 kWh/m²/day, and the cloudiest were 1988 and 2013 at 5.9.
Average wind speed in Tucson during August is 1.8 m/s. The windiest August was 1996 at 2.2 m/s, while the calmest were 1986 and 2007 at 1.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 27.9°C | 28.4°C | 28.4°C | 29.1°C | 30.2°C | +2.3°C |
| Avg High | 34.1°C | 34.8°C | 34.7°C | 35.4°C | 36.7°C | +2.6°C |
| Avg Low | 21.7°C | 22.0°C | 22.2°C | 22.8°C | 23.7°C | +2°C |
| Avg Rain | 90 mm | 90 mm | 73 mm | 62 mm | 67 mm | -23 mm |
August temperatures in Tucson have risen by about 1.7°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 15.4°C (1990) to a record high of 43.1°C (2023).
Rainfall in August is a relatively wet time of year, averaging 77 mm, with a wettest year of 146 mm.
A good time to visit Tucson
August is a good time to visit Tucson, with days averaging 35°C and nights around 22.4°C (mean 28.7°C, warmer than Tucson's yearly average) and moderate rainfall. October and May are marginally more temperate, but August still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 37.6°C | 30.6°C | 23.6°C | 42.9°C | 21.3°C | 57 mm | 39% | 2 m/s | 6.6 |
| 2024 | 37.0°C | 30.4°C | 23.9°C | 41.4°C | 21.3°C | 53 mm | 43% | 1.7 m/s | 6.4 |
| 2023 | 38.3°C | 31.5°C | 24.7°C | 43.1°C | 21.4°C | 38 mm | 38% | 2.1 m/s | 6.5 |
| 2022 | 34.0°C | 28.2°C | 22.4°C | 38.6°C | 20.4°C | 110 mm | 56% | 1.6 m/s | 6.3 |
| 2021 | 34.2°C | 28.3°C | 22.4°C | 40.1°C | 18.3°C | 100 mm | 56% | 1.8 m/s | 6.5 |
| 2020 🔥 | 39.2°C | 32.1°C | 25.0°C | 42.2°C | 22.9°C | 43 mm | 36% | 2 m/s | 6.8 |
| 2019 | 36.8°C | 30.2°C | 23.6°C | 42.1°C | 20.3°C | 54 mm | 42% | 1.9 m/s | 6.7 |
| 2018 | 34.5°C | 28.7°C | 22.8°C | 41.4°C | 18.9°C | 68 mm | 50% | 1.7 m/s | 6.5 |
| 2017 | 35.5°C | 28.8°C | 22.1°C | 38.3°C | 18.5°C | 42 mm | 45% | 2 m/s | 7 |
| 2016 | 34.3°C | 28.0°C | 21.8°C | 39.0°C | 18.4°C | 69 mm | 48% | 1.8 m/s | 6.5 |
| 2015 | 36.0°C | 29.8°C | 23.6°C | 41.8°C | 21.4°C | 53 mm | 47% | 1.9 m/s | 6.5 |
| 2014 | 33.3°C | 27.4°C | 21.5°C | 38.2°C | 17.8°C | 79 mm | 51% | 1.7 m/s | 6.4 |
| 2013 | 35.2°C | 28.8°C | 22.4°C | 40.4°C | 18.8°C | 67 mm | 46% | 1.7 m/s | 5.9 |
| 2012 | 36.0°C | 29.4°C | 22.9°C | 41.9°C | 19.9°C | 63 mm | 47% | 1.7 m/s | 6.6 |
| 2011 | 36.7°C | 30.4°C | 24.1°C | 41.1°C | 21.1°C | 53 mm | 42% | 1.7 m/s | 6.4 |
| 2010 | 35.3°C | 29.0°C | 22.8°C | 39.7°C | 18.7°C | 66 mm | 50% | 2 m/s | 6.6 |
| 2009 | 36.7°C | 29.6°C | 22.4°C | 39.9°C | 18.5°C | 41 mm | 35% | 2 m/s | 6.9 |
| 2008 | 33.1°C | 27.5°C | 21.9°C | 38.8°C | 19.8°C | 113 mm | 55% | 1.7 m/s | 6.5 |
| 2007 | 34.1°C | 28.4°C | 22.7°C | 40.2°C | 20.3°C | 76 mm | 55% | 1.5 m/s | 6.4 |
| 2006 | 32.4°C | 27.0°C | 21.7°C | 36.8°C | 19.1°C | 64 mm | 55% | 1.6 m/s | 6.1 |
| 2005 | 33.5°C | 27.6°C | 21.7°C | 38.7°C | 19.0°C | 101 mm | 54% | 1.6 m/s | 6.3 |
| 2004 | 35.1°C | 28.3°C | 21.5°C | 39.2°C | 18.3°C | 47 mm | 41% | 1.9 m/s | 6.6 |
| 2003 | 35.4°C | 29.1°C | 22.8°C | 41.4°C | 19.6°C | 65 mm | 49% | 1.8 m/s | 6.4 |
| 2002 | 36.0°C | 29.1°C | 22.2°C | 40.5°C | 19.3°C | 51 mm | 42% | 2.1 m/s | 6.6 |
| 2001 | 35.7°C | 29.2°C | 22.6°C | 40.8°C | 19.8°C | 74 mm | 46% | 1.7 m/s | 6.6 |
| 2000 | 34.9°C | 28.5°C | 22.0°C | 39.7°C | 16.7°C | 98 mm | 49% | 1.7 m/s | 6.4 |
| 1999 | 35.4°C | 28.6°C | 21.7°C | 40.1°C | 18.5°C | 89 mm | 47% | 1.7 m/s | 6.4 |
| 1998 | 35.6°C | 29.2°C | 22.7°C | 39.8°C | 20.3°C | 80 mm | 49% | 1.8 m/s | 6.6 |
| 1997 | 35.0°C | 28.8°C | 22.6°C | 39.6°C | 19.7°C | 75 mm | 50% | 1.8 m/s | 6.1 |
| 1996 | 35.3°C | 28.6°C | 21.9°C | 39.8°C | 19.2°C | 72 mm | 48% | 2.2 m/s | 6.8 |
| 1995 | 36.1°C | 29.9°C | 23.7°C | 41.7°C | 20.2°C | 97 mm | 48% | 1.7 m/s | 6.1 |
| 1994 | 36.3°C | 29.8°C | 23.4°C | 41.1°C | 21.0°C | 62 mm | 46% | 1.8 m/s | 6.5 |
| 1993 🌧️ | 34.1°C | 28.0°C | 21.9°C | 40.5°C | 19.0°C | 146 mm | 51% | 1.6 m/s | 6 |
| 1992 | 34.0°C | 27.6°C | 21.3°C | 40.2°C | 16.5°C | 119 mm | 52% | 1.8 m/s | 6.5 |
| 1991 | 34.2°C | 28.1°C | 21.9°C | 38.9°C | 19.3°C | 71 mm | 46% | 1.7 m/s | 6 |
| 1990 ❄️ | 31.8°C | 25.5°C | 19.2°C | 35.9°C | 15.4°C | 91 mm | 56% | 2.1 m/s | 6.7 |
| 1989 | 34.1°C | 27.5°C | 20.9°C | 37.1°C | 16.3°C | 56 mm | 49% | 2 m/s | 6.7 |
| 1988 | 34.1°C | 27.9°C | 21.8°C | 38.4°C | 20.0°C | 101 mm | 55% | 1.7 m/s | 5.9 |
| 1987 | 33.4°C | 27.0°C | 20.7°C | 38.2°C | 16.1°C | 90 mm | 49% | 1.8 m/s | 6.5 |
| 1986 | 34.0°C | 28.2°C | 22.4°C | 39.1°C | 19.6°C | 123 mm | 55% | 1.5 m/s | 6.4 |
| 1985 | 35.3°C | 28.7°C | 22.1°C | 40.7°C | 18.1°C | 62 mm | 47% | 1.7 m/s | 6.4 |
| 1984 | 31.7°C | 26.4°C | 21.0°C | 38.1°C | 17.5°C | 127 mm | 64% | 1.6 m/s | 6.1 |
| 1983 | 34.2°C | 27.8°C | 21.4°C | 39.2°C | 17.7°C | 115 mm | 55% | 1.7 m/s | — |
| 1982 | 34.5°C | 28.4°C | 22.3°C | 38.8°C | 19.4°C | 90 mm | 52% | 1.7 m/s | — |
| 1981 | 35.7°C | 29.1°C | 22.4°C | 39.8°C | 20.4°C | 44 mm | 44% | 1.9 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 35°C with lows near 22.4°C (mean 28.7°C), based on 45 years of NASA POWER data.
August averages 77 mm of rainfall in Tucson, a relatively wet time of year. The wettest on record was 146 mm in 1993.
The hottest August reached 43.1°C in 2023. The coldest dipped to 15.4°C in 1990.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 1.7°C. Daytime highs moved from 34.3°C to 36.2°C and overnight lows from 21.8°C to 23.4°C over the same span.
August is one of the warmer months of the year in Tucson and a relatively wet time of year, so plan for around 35°C daytime highs and 22.4°C at night.
Not quite — August is the 10th coolest month in Tucson, averaging 28.7°C.
For August in Tucson, pack light, breathable clothing and sun protection, with typical highs of 35°C and lows of 22.4°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 48% — relatively dry.
Average wind speed in August is 1.8 m/s. The windiest August on record averaged 2.2 m/s (1996).
The wettest August on record was 1993 with 146 mm. On average, August sees 77 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 August, 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 August specifically, along with year-by-year records and how the month has changed over the decades.
