August is one of the cooler months of the year in Scottsdale, with average highs near 11.4°C and lows around 6.7°C (mean 9.1°C). It is a relatively wet time of year, averaging 92 mm of rainfall and 86% relative humidity across the period.
August is one of the cooler months of the year in Scottsdale. Across 45 years of records, the warmest August in Scottsdale was 2024 — when the month averaged 10.9°C — while the coldest was 1990 at 7.7°C. Typical August days reach 11.4°C with nights near 6.7°C. The long-term trend is warming, about 0.2°C per decade.
August is a relatively wet time of year in Scottsdale, averaging 92 mm of rainfall. The wettest August on record was 2013 with 231 mm, while the driest was 2006 at 21 mm.
Relative humidity in Scottsdale during August averages 86%. The most humid August was 2011 at 89%, and the least humid was 1994 at 81%.
August receives about 2.5 kWh/m²/day of solar energy in Scottsdale. The sunniest August was 1994 at 2.9 kWh/m²/day, and the cloudiest was 2011 at 2.1.
Average wind speed in Scottsdale during August is 3.9 m/s. The windiest August was 2009 at 5.4 m/s, while the calmest were 1986, 1989 and 1999 at 2.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 9.0°C | 8.6°C | 9.2°C | 8.9°C | 9.7°C | +0.7°C |
| Avg High | 11.3°C | 11.0°C | 11.7°C | 11.3°C | 12.0°C | +0.7°C |
| Avg Low | 6.6°C | 6.3°C | 6.8°C | 6.5°C | 7.4°C | +0.8°C |
| Avg Rain | 96 mm | 96 mm | 99 mm | 93 mm | 69 mm | -27 mm |
August temperatures in Scottsdale have risen by about 0.8°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 1°C (1985) to a record high of 15.7°C (1999).
Rainfall in August is a relatively wet time of year, averaging 92 mm, with a wettest year of 231 mm.
A quieter season to visit Scottsdale
If your dates are flexible, the more temperate months of February and January tend to be the most comfortable for visiting Scottsdale. That said, August — with days averaging 11.4°C and nights around 6.7°C (mean 9.1°C) and higher rainfall (92 mm) — can still be rewarding for travellers who don't mind the cooler conditions, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 12.2°C | 9.7°C | 7.1°C | 14.2°C | 3.2°C | 62 mm | 85% | 3.5 m/s | 2.7 |
| 2024 🔥 | 13.0°C | 10.9°C | 8.8°C | 15.3°C | 4.9°C | 99 mm | 88% | 4.3 m/s | 2.4 |
| 2023 | 12.5°C | 9.9°C | 7.2°C | 14.3°C | 3.2°C | 41 mm | 85% | 3.5 m/s | 2.6 |
| 2022 | 11.9°C | 9.6°C | 7.4°C | 14.8°C | 4.4°C | 96 mm | 86% | 3.6 m/s | 2.5 |
| 2021 | 11.6°C | 9.3°C | 7.0°C | 12.7°C | 3.4°C | 62 mm | 86% | 4.2 m/s | 2.4 |
| 2020 | 11.1°C | 8.8°C | 6.6°C | 13.3°C | 2.7°C | 56 mm | 86% | 3.7 m/s | 2.6 |
| 2019 | 11.1°C | 8.5°C | 5.8°C | 12.8°C | 3.7°C | 54 mm | 84% | 4.2 m/s | 2.7 |
| 2018 | 11.1°C | 8.6°C | 6.2°C | 13.6°C | 2.3°C | 52 mm | 84% | 4.3 m/s | 2.5 |
| 2017 | 11.0°C | 8.4°C | 5.8°C | 13.5°C | 2.2°C | 76 mm | 84% | 3.9 m/s | 2.8 |
| 2016 | 11.3°C | 8.9°C | 6.4°C | 14.1°C | 3.1°C | 65 mm | 84% | 3.6 m/s | 2.6 |
| 2015 | 10.5°C | 7.8°C | 5.0°C | 12.5°C | 2.9°C | 52 mm | 83% | 3.7 m/s | 2.7 |
| 2014 | 12.1°C | 9.5°C | 6.8°C | 14.3°C | 2.6°C | 25 mm | 85% | 3 m/s | 2.8 |
| 2013 🌧️ | 11.5°C | 9.2°C | 7.0°C | 13.6°C | 2.5°C | 231 mm | 86% | 5.1 m/s | 2.3 |
| 2012 | 11.2°C | 8.9°C | 6.6°C | 14.2°C | 3.1°C | 89 mm | 85% | 4.1 m/s | 2.4 |
| 2011 | 12.1°C | 10.2°C | 8.3°C | 14.7°C | 5.1°C | 153 mm | 89% | 3.6 m/s | 2.1 |
| 2010 | 11.0°C | 8.8°C | 6.6°C | 13.0°C | 3.7°C | 132 mm | 85% | 4.1 m/s | 2.4 |
| 2009 | 11.8°C | 9.8°C | 7.8°C | 13.7°C | 5.9°C | 204 mm | 87% | 5.4 m/s | 2.2 |
| 2008 | 11.3°C | 8.6°C | 6.0°C | 13.7°C | 2.4°C | 52 mm | 83% | 3.4 m/s | 2.7 |
| 2007 | 11.7°C | 9.4°C | 7.1°C | 14.5°C | 3.9°C | 111 mm | 86% | 4.3 m/s | 2.6 |
| 2006 | 11.9°C | 9.3°C | 6.7°C | 14.1°C | 4.1°C | 21 mm | 86% | 3.4 m/s | 2.7 |
| 2005 | 12.0°C | 9.4°C | 6.8°C | 14.3°C | 2.7°C | 155 mm | 86% | 4.4 m/s | 2.5 |
| 2004 | 11.3°C | 8.7°C | 6.2°C | 14.9°C | 2.3°C | 61 mm | 85% | 3.7 m/s | 2.8 |
| 2003 | 11.4°C | 9.1°C | 6.9°C | 13.3°C | 3.3°C | 104 mm | 85% | 4.3 m/s | 2.4 |
| 2002 | 11.8°C | 9.2°C | 6.6°C | 13.5°C | 3.3°C | 57 mm | 84% | 3.6 m/s | 2.6 |
| 2001 | 11.9°C | 9.6°C | 7.3°C | 14.0°C | 2.9°C | 150 mm | 85% | 4.3 m/s | 2.3 |
| 2000 | 11.5°C | 9.2°C | 7.0°C | 14.4°C | 3.6°C | 72 mm | 85% | 3.4 m/s | 2.6 |
| 1999 | 12.3°C | 9.9°C | 7.5°C | 15.7°C | 3.9°C | 87 mm | 88% | 2.9 m/s | 2.5 |
| 1998 | 11.4°C | 8.9°C | 6.4°C | 13.8°C | 3.2°C | 34 mm | 85% | 3.2 m/s | 2.7 |
| 1997 | 11.0°C | 8.8°C | 6.6°C | 14.0°C | 2.8°C | 80 mm | 84% | 4.5 m/s | 2.5 |
| 1996 | 10.5°C | 8.3°C | 6.1°C | 12.5°C | 1.0°C | 141 mm | 86% | 4.3 m/s | 2.4 |
| 1995 | 11.1°C | 8.6°C | 6.1°C | 13.5°C | 2.8°C | 67 mm | 87% | 4 m/s | 2.5 |
| 1994 | 10.6°C | 8.2°C | 5.8°C | 14.2°C | 2.2°C | 52 mm | 81% | 4.4 m/s | 2.9 |
| 1993 | 11.7°C | 9.6°C | 7.4°C | 14.8°C | 2.8°C | 82 mm | 86% | 4.4 m/s | 2.5 |
| 1992 | 10.3°C | 7.9°C | 5.4°C | 12.1°C | 2.5°C | 122 mm | 85% | 4.2 m/s | 2.5 |
| 1991 | 10.4°C | 8.4°C | 6.4°C | 12.4°C | 2.6°C | 183 mm | 85% | 5.1 m/s | 2.4 |
| 1990 ❄️ | 10.3°C | 7.7°C | 5.2°C | 12.2°C | 1.8°C | 107 mm | 84% | 3.5 m/s | 2.7 |
| 1989 | 11.0°C | 8.5°C | 6.0°C | 13.0°C | 3.3°C | 68 mm | 85% | 2.9 m/s | 2.6 |
| 1988 | 11.8°C | 9.4°C | 7.0°C | 13.9°C | 3.2°C | 90 mm | 86% | 3.3 m/s | 2.6 |
| 1987 | 11.3°C | 8.8°C | 6.3°C | 14.0°C | 2.0°C | 50 mm | 87% | 3 m/s | 2.6 |
| 1986 | 10.8°C | 8.5°C | 6.2°C | 13.1°C | 2.7°C | 90 mm | 87% | 2.9 m/s | 2.6 |
| 1985 | 10.9°C | 8.6°C | 6.2°C | 13.4°C | 1.0°C | 92 mm | 87% | 3.2 m/s | 2.5 |
| 1984 | 10.7°C | 8.7°C | 6.6°C | 12.7°C | 2.6°C | 186 mm | 87% | 4.2 m/s | 2.3 |
| 1983 | 11.8°C | 9.4°C | 7.1°C | 14.0°C | 2.4°C | 78 mm | 89% | 3.7 m/s | — |
| 1982 | 12.5°C | 10.1°C | 7.7°C | 14.7°C | 3.3°C | 24 mm | 88% | 3.5 m/s | — |
| 1981 | 10.7°C | 8.6°C | 6.5°C | 13.0°C | 2.7°C | 189 mm | 88% | 3.7 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 11.4°C with lows near 6.7°C (mean 9.1°C), based on 45 years of NASA POWER data.
August averages 92 mm of rainfall in Scottsdale, a relatively wet time of year. The wettest on record was 231 mm in 2013.
The hottest August reached 15.7°C in 1999. The coldest dipped to 1°C in 1985.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 0.8°C. Daytime highs moved from 11.3°C to 12.2°C and overnight lows from 6.8°C to 7.5°C over the same span.
August is one of the cooler months of the year in Scottsdale and a relatively wet time of year, so plan for around 11.4°C daytime highs and 6.7°C at night.
Not quite — August is the 2nd coolest month in Scottsdale, averaging 9.1°C.
For August in Scottsdale, pack warm layers and a jacket for chilly mornings, with typical highs of 11.4°C and lows of 6.7°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 86% — quite humid.
Average wind speed in August is 3.9 m/s. The windiest August on record averaged 5.4 m/s (2009).
The wettest August on record was 2013 with 231 mm. On average, August sees 92 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 Scottsdale 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.
