August is one of the warmer months of the year in Apache Junction, with average highs near 36.1°C and lows around 23°C (mean 29.6°C). It is a relatively wet time of year, averaging 55 mm of rainfall and 43% relative humidity across the period.
August is one of the warmer months of the year in Apache Junction. Across 45 years of records, the warmest August in Apache Junction was 2020 — when the month averaged 32.9°C — while the coldest was 1990 at 26.7°C. Typical August days reach 36.1°C with nights near 23°C. The long-term trend is warming, about 0.5°C per decade.
August is a relatively wet time of year in Apache Junction, averaging 55 mm of rainfall. The wettest August on record was 1992 with 115 mm, while the driest were 2009 and 2019 at 13 mm.
Relative humidity in Apache Junction during August averages 43%. The most humid August was 1984 at 56%, and the least humid was 2009 at 27%.
August receives about 6.8 kWh/m²/day of solar energy in Apache Junction. The sunniest August was 2009 at 7.3 kWh/m²/day, and the cloudiest was 1988 at 6.1.
Average wind speed in Apache Junction during August is 1.9 m/s. The windiest August was 2020 at 2.2 m/s, while the calmest was 2007 at 1.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 28.6°C | 29.3°C | 29.2°C | 30.0°C | 31.1°C | +2.5°C |
| Avg High | 35.1°C | 35.9°C | 35.7°C | 36.6°C | 37.8°C | +2.7°C |
| Avg Low | 22.2°C | 22.7°C | 22.8°C | 23.4°C | 24.4°C | +2.2°C |
| Avg Rain | 65 mm | 68 mm | 50 mm | 43 mm | 46 mm | -20 mm |
August temperatures in Apache Junction have risen by about 1.8°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 16°C (1990) to a record high of 43.5°C (2025).
Rainfall in August is a relatively wet time of year, averaging 55 mm, with a wettest year of 115 mm.
A good time to visit Apache Junction
August is a good time to visit Apache Junction, with days averaging 36.1°C and nights around 23°C (mean 29.6°C, warmer than Apache Junction's yearly average) and moderate rainfall. May and October 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 | 38.5°C | 31.4°C | 24.3°C | 43.5°C | 21.6°C | 41 mm | 32% | 1.9 m/s | 7 |
| 2024 | 38.5°C | 31.7°C | 25.0°C | 42.9°C | 22.3°C | 32 mm | 37% | 1.9 m/s | 6.8 |
| 2023 | 38.8°C | 32.1°C | 25.4°C | 42.7°C | 21.9°C | 17 mm | 33% | 2.1 m/s | 6.7 |
| 2022 | 35.4°C | 29.2°C | 22.9°C | 40.0°C | 21.2°C | 78 mm | 53% | 1.7 m/s | 6.5 |
| 2021 | 35.3°C | 29.1°C | 23.0°C | 41.8°C | 19.7°C | 89 mm | 49% | 1.8 m/s | 6.7 |
| 2020 🔥 | 40.1°C | 32.9°C | 25.8°C | 43.1°C | 21.2°C | 17 mm | 29% | 2.2 m/s | 7 |
| 2019 | 38.5°C | 31.5°C | 24.4°C | 42.5°C | 22.3°C | 13 mm | 32% | 2 m/s | 7.1 |
| 2018 | 36.1°C | 30.0°C | 23.9°C | 42.6°C | 21.5°C | 52 mm | 43% | 1.7 m/s | 6.9 |
| 2017 | 36.8°C | 29.9°C | 23.0°C | 40.2°C | 19.0°C | 20 mm | 38% | 1.9 m/s | 7.1 |
| 2016 | 34.9°C | 28.6°C | 22.3°C | 39.3°C | 18.9°C | 47 mm | 45% | 1.8 m/s | 6.8 |
| 2015 | 37.6°C | 30.9°C | 24.3°C | 42.8°C | 21.6°C | 42 mm | 38% | 2.1 m/s | 6.9 |
| 2014 | 34.3°C | 27.9°C | 21.6°C | 38.0°C | 18.9°C | 76 mm | 47% | 1.8 m/s | 6.8 |
| 2013 | 36.2°C | 29.6°C | 23.0°C | 42.0°C | 18.8°C | 39 mm | 41% | 2 m/s | 6.2 |
| 2012 | 36.8°C | 30.2°C | 23.6°C | 42.6°C | 21.1°C | 58 mm | 43% | 1.8 m/s | 6.8 |
| 2011 | 38.6°C | 31.7°C | 24.9°C | 41.9°C | 22.4°C | 34 mm | 36% | 2 m/s | 7 |
| 2010 | 35.8°C | 29.5°C | 23.2°C | 40.5°C | 17.7°C | 46 mm | 45% | 2 m/s | 6.9 |
| 2009 | 37.9°C | 30.4°C | 23.0°C | 41.2°C | 18.9°C | 13 mm | 27% | 2.1 m/s | 7.3 |
| 2008 | 34.0°C | 28.4°C | 22.8°C | 40.1°C | 19.9°C | 93 mm | 51% | 1.7 m/s | 6.9 |
| 2007 | 35.8°C | 29.8°C | 23.7°C | 40.8°C | 19.8°C | 56 mm | 49% | 1.6 m/s | 6.7 |
| 2006 | 33.2°C | 27.6°C | 22.1°C | 37.5°C | 18.3°C | 54 mm | 53% | 1.7 m/s | 6.7 |
| 2005 | 34.5°C | 28.3°C | 22.1°C | 40.9°C | 18.6°C | 59 mm | 49% | 1.8 m/s | 6.7 |
| 2004 | 35.7°C | 28.8°C | 21.9°C | 41.3°C | 18.3°C | 42 mm | 37% | 1.9 m/s | 6.8 |
| 2003 | 36.6°C | 30.1°C | 23.6°C | 43.3°C | 20.0°C | 41 mm | 42% | 2 m/s | 6.8 |
| 2002 | 37.3°C | 30.3°C | 23.3°C | 41.3°C | 19.6°C | 25 mm | 30% | 2 m/s | 7 |
| 2001 | 36.0°C | 29.2°C | 22.5°C | 40.5°C | 20.0°C | 52 mm | 45% | 1.8 m/s | 6.8 |
| 2000 | 36.1°C | 29.4°C | 22.6°C | 41.8°C | 17.5°C | 62 mm | 45% | 1.9 m/s | 6.5 |
| 1999 | 36.2°C | 29.2°C | 22.2°C | 41.1°C | 17.8°C | 61 mm | 42% | 1.9 m/s | 6.6 |
| 1998 | 37.4°C | 30.6°C | 23.8°C | 42.2°C | 21.2°C | 36 mm | 39% | 2 m/s | 6.9 |
| 1997 | 36.3°C | 29.9°C | 23.5°C | 40.1°C | 20.6°C | 50 mm | 43% | 1.9 m/s | 6.6 |
| 1996 | 36.6°C | 29.9°C | 23.2°C | 41.1°C | 18.1°C | 40 mm | 41% | 2.1 m/s | 7.2 |
| 1995 | 37.2°C | 30.7°C | 24.2°C | 43.0°C | 21.1°C | 73 mm | 44% | 1.9 m/s | 6.9 |
| 1994 | 37.4°C | 30.7°C | 24.1°C | 41.9°C | 22.3°C | 44 mm | 42% | 1.9 m/s | 6.9 |
| 1993 | 35.3°C | 28.9°C | 22.4°C | 42.2°C | 19.0°C | 94 mm | 44% | 1.9 m/s | 6.5 |
| 1992 🌧️ | 34.1°C | 27.7°C | 21.4°C | 39.7°C | 16.6°C | 115 mm | 52% | 1.7 m/s | 6.7 |
| 1991 | 35.2°C | 28.8°C | 22.3°C | 40.1°C | 20.0°C | 54 mm | 43% | 1.8 m/s | 6.5 |
| 1990 ❄️ | 33.2°C | 26.7°C | 20.1°C | 39.5°C | 16.0°C | 110 mm | 48% | 2 m/s | 6.8 |
| 1989 | 34.9°C | 28.2°C | 21.6°C | 38.4°C | 17.3°C | 42 mm | 42% | 2 m/s | 7.2 |
| 1988 | 34.4°C | 28.2°C | 22.0°C | 38.9°C | 19.9°C | 105 mm | 53% | 2 m/s | 6.1 |
| 1987 | 34.1°C | 27.6°C | 21.0°C | 38.6°C | 17.0°C | 52 mm | 46% | 1.7 m/s | 6.9 |
| 1986 | 35.3°C | 29.2°C | 23.1°C | 40.8°C | 20.6°C | 82 mm | 48% | 1.7 m/s | 6.6 |
| 1985 | 36.9°C | 29.8°C | 22.7°C | 41.9°C | 19.6°C | 34 mm | 38% | 1.8 m/s | 6.9 |
| 1984 | 33.3°C | 27.4°C | 21.5°C | 39.1°C | 18.3°C | 82 mm | 56% | 1.7 m/s | 6.2 |
| 1983 | 35.1°C | 28.5°C | 21.9°C | 39.2°C | 18.2°C | 83 mm | 52% | 1.7 m/s | — |
| 1982 | 34.7°C | 28.7°C | 22.7°C | 39.0°C | 20.1°C | 72 mm | 52% | 1.7 m/s | — |
| 1981 | 37.3°C | 30.2°C | 23.1°C | 41.2°C | 19.7°C | 37 mm | 38% | 2 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 36.1°C with lows near 23°C (mean 29.6°C), based on 45 years of NASA POWER data.
August averages 55 mm of rainfall in Apache Junction, a relatively wet time of year. The wettest on record was 115 mm in 1992.
The hottest August reached 43.5°C in 2025. The coldest dipped to 16°C in 1990.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 1.8°C. Daytime highs moved from 35.5°C to 37.3°C and overnight lows from 22.4°C to 24.1°C over the same span.
August is one of the warmer months of the year in Apache Junction and a relatively wet time of year, so plan for around 36.1°C daytime highs and 23°C at night.
Not quite — August is the 11th coolest month in Apache Junction, averaging 29.6°C.
For August in Apache Junction, pack light, breathable clothing and sun protection, with typical highs of 36.1°C and lows of 23°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 43% — relatively dry.
Average wind speed in August is 1.9 m/s. The windiest August on record averaged 2.2 m/s (2020).
The wettest August on record was 1992 with 115 mm. On average, August sees 55 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 Apache Junction 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.
