August is one of the cooler months of the year in Atherton, with average highs near 22.6°C and lows around 13.8°C (mean 18.2°C). It is one of the drier months, averaging 49 mm of rainfall and 81% relative humidity across the period.
August is one of the cooler months of the year in Atherton. Across 45 years of records, the warmest Augusts in Atherton were 2017 and 2020 — when the month averaged 20.5°C — while the coldest was 2006 at 15.8°C. Typical August days reach 22.6°C with nights near 13.8°C. The long-term trend is warming, about 0.5°C per decade.
August is one of the drier months in Atherton, averaging 49 mm of rainfall. The wettest August on record was 1995 with 272 mm, while the driest was 2018 at 0 mm.
Relative humidity in Atherton during August averages 81%. The most humid August was 1995 at 90%, and the least humid was 2020 at 67%.
August receives about 4.9 kWh/m²/day of solar energy in Atherton. The sunniest Augusts were 1990 and 2004 at 5.6 kWh/m²/day, and the cloudiest was 1995 at 3.6.
Average wind speed in Atherton during August is 1.1 m/s. The windiest Augusts were 1982 and 1995 at 1.5 m/s, while the calmest was 1981 at 0.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 17.8°C | 17.4°C | 17.7°C | 18.7°C | 19.9°C | +2.1°C |
| Avg High | 21.9°C | 21.5°C | 22.0°C | 23.6°C | 24.9°C | +3°C |
| Avg Low | 13.8°C | 13.3°C | 13.5°C | 13.9°C | 14.9°C | +1.1°C |
| Avg Rain | 54 mm | 84 mm | 45 mm | 30 mm | 22 mm | -32 mm |
August temperatures in Atherton have risen by about 1.9°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 4°C (1990) to a record high of 33°C (2020).
Rainfall in August is one of the drier months, averaging 49 mm, with a wettest year of 272 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.8°C per decade while lows rose 0.3°C per decade, widening the gap between day and night.
One of the best times to visit Atherton
August is one of the best times to visit Atherton. Expect days averaging 22.6°C and nights around 13.8°C (mean 18.2°C) — cooler than Atherton's yearly average — with moderate rainfall (49 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 25.4°C | 19.9°C | 14.3°C | 32.0°C | 7.5°C | 7 mm | 71% | 1.1 m/s | 5.2 |
| 2024 | 25.0°C | 20.2°C | 15.5°C | 29.0°C | 13.5°C | 30 mm | 78% | 1.2 m/s | 4.8 |
| 2023 | 23.2°C | 18.7°C | 14.1°C | 28.2°C | 11.6°C | 42 mm | 77% | 1.4 m/s | 4.8 |
| 2022 | 24.8°C | 19.9°C | 15.0°C | 30.6°C | 9.3°C | 16 mm | 77% | 1.2 m/s | 4.7 |
| 2021 | 24.5°C | 20.1°C | 15.6°C | 28.0°C | 10.2°C | 32 mm | 79% | 1.2 m/s | 4.4 |
| 2020 | 26.4°C | 20.5°C | 14.7°C | 33.0°C | 11.0°C | 6 mm | 67% | 1.1 m/s | 5.1 |
| 2019 | 24.7°C | 19.4°C | 14.1°C | 29.6°C | 8.6°C | 10 mm | 72% | 1.2 m/s | 5.1 |
| 2018 | 25.8°C | 19.8°C | 13.8°C | 30.7°C | 9.6°C | 0 mm | 69% | 1 m/s | 5.5 |
| 2017 🔥 | 26.0°C | 20.5°C | 15.1°C | 29.1°C | 13.0°C | 3 mm | 72% | 1.1 m/s | 5.2 |
| 2016 | 24.0°C | 19.3°C | 14.7°C | 29.7°C | 9.6°C | 22 mm | 77% | 1.2 m/s | 4.6 |
| 2015 | 25.0°C | 19.5°C | 14.0°C | 28.8°C | 8.9°C | 14 mm | 73% | 1 m/s | 5.5 |
| 2014 | 21.2°C | 17.2°C | 13.1°C | 24.4°C | 8.8°C | 78 mm | 85% | 1.1 m/s | 4.6 |
| 2013 | 22.3°C | 17.8°C | 13.3°C | 25.7°C | 10.7°C | 15 mm | 83% | 0.9 m/s | 5.4 |
| 2012 | 21.2°C | 17.0°C | 12.8°C | 24.8°C | 4.9°C | 25 mm | 84% | 1 m/s | 5.1 |
| 2011 | 21.9°C | 17.4°C | 12.9°C | 26.8°C | 7.9°C | 37 mm | 80% | 1.1 m/s | 5 |
| 2010 | 23.4°C | 19.2°C | 14.9°C | 26.7°C | 8.5°C | 94 mm | 84% | 1 m/s | 4.6 |
| 2009 | 24.1°C | 19.3°C | 14.5°C | 28.6°C | 12.5°C | 14 mm | 79% | 1.1 m/s | 5.4 |
| 2008 | 22.0°C | 17.6°C | 13.2°C | 25.2°C | 9.7°C | 11 mm | 80% | 1.2 m/s | 4.9 |
| 2007 | 21.3°C | 17.7°C | 14.2°C | 24.5°C | 8.9°C | 47 mm | 86% | 1.1 m/s | 4.2 |
| 2006 ❄️ | 19.9°C | 15.8°C | 11.7°C | 22.5°C | 6.5°C | 21 mm | 84% | 1.2 m/s | 5.3 |
| 2005 | 20.0°C | 16.9°C | 13.8°C | 22.5°C | 6.7°C | 139 mm | 88% | 1.2 m/s | 3.9 |
| 2004 | 22.3°C | 17.3°C | 12.3°C | 27.0°C | 9.1°C | 7 mm | 77% | 1 m/s | 5.6 |
| 2003 | 22.1°C | 18.2°C | 14.4°C | 26.7°C | 8.2°C | 37 mm | 85% | 1.1 m/s | 4.7 |
| 2002 | 22.4°C | 18.1°C | 13.7°C | 26.4°C | 11.5°C | 69 mm | 81% | 1.1 m/s | 4.3 |
| 2001 | 23.4°C | 18.4°C | 13.4°C | 28.7°C | 10.3°C | 21 mm | 76% | 1 m/s | 5 |
| 2000 | 22.1°C | 17.8°C | 13.5°C | 28.1°C | 7.9°C | 87 mm | 81% | 1 m/s | 5.2 |
| 1999 | 20.4°C | 16.9°C | 13.4°C | 23.4°C | 8.9°C | 102 mm | 87% | 1.2 m/s | 4.5 |
| 1998 | 23.5°C | 19.3°C | 15.0°C | 27.3°C | 6.9°C | 140 mm | 84% | 1 m/s | 4.9 |
| 1997 | 20.5°C | 16.7°C | 12.8°C | 22.7°C | 7.8°C | 104 mm | 86% | 1 m/s | 4.7 |
| 1996 | 22.3°C | 18.1°C | 13.9°C | 27.4°C | 8.8°C | 32 mm | 84% | 1 m/s | 4.9 |
| 1995 🌧️ | 19.7°C | 16.8°C | 14.0°C | 24.0°C | 4.6°C | 272 mm | 90% | 1.5 m/s | 3.6 |
| 1994 | 19.7°C | 16.2°C | 12.7°C | 21.9°C | 7.2°C | 82 mm | 87% | 1.3 m/s | 4.4 |
| 1993 | 20.4°C | 16.8°C | 13.1°C | 24.0°C | 7.9°C | 58 mm | 86% | 1.1 m/s | 4.4 |
| 1992 | 23.8°C | 19.0°C | 14.2°C | 29.9°C | 9.0°C | 25 mm | 80% | 1 m/s | 5 |
| 1991 | 23.3°C | 18.4°C | 13.6°C | 29.7°C | 10.0°C | 19 mm | 79% | 1.1 m/s | 4.7 |
| 1990 | 21.7°C | 16.2°C | 10.7°C | 26.2°C | 4.0°C | 2 mm | 77% | 1 m/s | 5.6 |
| 1989 | 20.9°C | 16.9°C | 12.8°C | 26.4°C | 6.8°C | 19 mm | 85% | 0.9 m/s | 4.8 |
| 1988 | 21.5°C | 18.2°C | 14.9°C | 25.6°C | 10.1°C | 115 mm | 88% | 1.2 m/s | 4.3 |
| 1987 | 21.4°C | 17.3°C | 13.3°C | 25.1°C | 9.3°C | 38 mm | 86% | 1 m/s | 4.9 |
| 1986 | 23.1°C | 18.6°C | 14.1°C | 27.7°C | 7.0°C | 50 mm | 82% | 0.9 m/s | 4.4 |
| 1985 | 22.8°C | 18.4°C | 14.1°C | 26.8°C | 9.5°C | 11 mm | 83% | 1 m/s | 5.2 |
| 1984 | 23.7°C | 18.6°C | 13.6°C | 28.6°C | 6.6°C | 12 mm | 78% | 0.9 m/s | 5.3 |
| 1983 | 20.6°C | 17.3°C | 13.9°C | 24.7°C | 7.6°C | 82 mm | 87% | 1.2 m/s | — |
| 1982 | 18.9°C | 16.1°C | 13.2°C | 21.3°C | 7.7°C | 154 mm | 88% | 1.5 m/s | — |
| 1981 | 24.0°C | 19.0°C | 14.0°C | 27.4°C | 9.9°C | 5 mm | 79% | 0.8 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 22.6°C with lows near 13.8°C (mean 18.2°C), based on 45 years of NASA POWER data.
August averages 49 mm of rainfall in Atherton, one of the drier months. The wettest on record was 272 mm in 1995.
The hottest August reached 33°C in 2020. The coldest dipped to 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 1.9°C. Daytime highs moved from 22°C to 24.6°C and overnight lows from 13.8°C to 14.9°C over the same span.
August is one of the cooler months of the year in Atherton and one of the drier months, so plan for around 22.6°C daytime highs and 13.8°C at night.
Not quite — August is the 3rd coolest month in Atherton, averaging 18.2°C.
For August in Atherton, pack light layers you can adjust through the day, with typical highs of 22.6°C and lows of 13.8°C.
Relative humidity in August averages 81% — quite humid.
Average wind speed in August is 1.1 m/s. The windiest August on record averaged 1.5 m/s (1982).
The wettest August on record was 1995 with 272 mm. On average, August sees 49 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 Atherton 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.
