August is one of the warmer months of the year in Caledon, with average highs near 26.3°C and lows around 14.5°C (mean 20.4°C). It is about average for rainfall, averaging 65 mm of rainfall and 67% relative humidity across the period.
August is one of the warmer months of the year in Caledon. Across 45 years of records, the warmest Augusts in Caledon were 2016 and 2021 — when the month averaged 23.3°C — while the coldest were 1982 and 1992 at 17.6°C. Typical August days reach 26.3°C with nights near 14.5°C. The long-term trend is warming, about 0.3°C per decade.
August is about average for rainfall in Caledon, averaging 65 mm of rainfall. The wettest August on record was 1981 with 107 mm, while the driest was 1989 at 30 mm.
Relative humidity in Caledon during August averages 67%. The most humid August was 2000 at 76%, and the least humid was 1987 at 59%.
August receives about 5.2 kWh/m²/day of solar energy in Caledon. The sunniest Augusts were 2002 and 2016 at 5.8 kWh/m²/day, and the cloudiest was 1997 at 4.6.
Average wind speed in Caledon during August is 2.2 m/s. The windiest August was 1987 at 2.7 m/s, while the calmest were 1996, 1998 and 2021, among others at 1.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 20.0°C | 20.0°C | 20.2°C | 20.8°C | 21.3°C | +1.3°C |
| Avg High | 26.1°C | 26.0°C | 26.0°C | 26.5°C | 27.2°C | +1.1°C |
| Avg Low | 14.0°C | 14.1°C | 14.4°C | 15.0°C | 15.4°C | +1.4°C |
| Avg Rain | 67 mm | 65 mm | 63 mm | 63 mm | 66 mm | 0 mm |
August temperatures in Caledon have risen by about 1.4°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 3.2°C (1982) to a record high of 35.7°C (2001).
Rainfall in August is about average for rainfall, averaging 65 mm, with a wettest year of 107 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.2°C per decade while lows rose 0.4°C per decade, narrowing the gap between day and night.
One of the best times to visit Caledon
August is one of the best times to visit Caledon. Expect days averaging 26.3°C and nights around 14.5°C (mean 20.4°C) — warmer than Caledon's yearly average — with moderate rainfall (65 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 | 27.1°C | 20.9°C | 14.8°C | 34.7°C | 6.7°C | 52 mm | 62% | 2.1 m/s | 5.3 |
| 2024 | 27.0°C | 21.1°C | 15.2°C | 33.1°C | 9.0°C | 66 mm | 67% | 2 m/s | 4.8 |
| 2023 | 25.2°C | 19.4°C | 13.7°C | 29.3°C | 8.7°C | 70 mm | 70% | 2.3 m/s | 5 |
| 2022 | 27.5°C | 21.4°C | 15.3°C | 32.9°C | 11.4°C | 75 mm | 67% | 2.1 m/s | 5.3 |
| 2021 | 29.1°C | 23.3°C | 17.4°C | 33.4°C | 11.8°C | 40 mm | 66% | 1.9 m/s | 5.3 |
| 2020 | 27.2°C | 21.5°C | 15.7°C | 32.0°C | 11.8°C | 95 mm | 69% | 2.3 m/s | 5.6 |
| 2019 | 26.6°C | 20.6°C | 14.5°C | 31.5°C | 9.8°C | 44 mm | 66% | 2.2 m/s | 5.7 |
| 2018 | 27.5°C | 22.3°C | 17.1°C | 33.5°C | 12.3°C | 87 mm | 72% | 2.1 m/s | 4.9 |
| 2017 | 24.1°C | 18.8°C | 13.6°C | 30.1°C | 8.4°C | 53 mm | 73% | 2.2 m/s | 5.1 |
| 2016 🔥 | 29.5°C | 23.3°C | 17.2°C | 35.1°C | 12.8°C | 71 mm | 65% | 2.2 m/s | 5.8 |
| 2015 | 25.8°C | 20.1°C | 14.4°C | 32.8°C | 10.6°C | 64 mm | 69% | 2.1 m/s | 5.2 |
| 2014 | 24.9°C | 19.3°C | 13.6°C | 30.9°C | 9.9°C | 55 mm | 73% | 2.1 m/s | 5.1 |
| 2013 | 25.6°C | 19.8°C | 14.0°C | 30.5°C | 9.9°C | 69 mm | 70% | 2 m/s | 5.4 |
| 2012 | 26.4°C | 20.6°C | 14.7°C | 32.2°C | 9.5°C | 71 mm | 67% | 2.1 m/s | 5.4 |
| 2011 | 26.6°C | 21.0°C | 15.5°C | 30.5°C | 11.5°C | 70 mm | 66% | 2.1 m/s | 5.1 |
| 2010 | 27.5°C | 21.7°C | 15.8°C | 33.3°C | 8.7°C | 44 mm | 68% | 2.2 m/s | 5.1 |
| 2009 | 25.2°C | 19.7°C | 14.2°C | 30.6°C | 9.3°C | 95 mm | 72% | 2.2 m/s | 5.2 |
| 2008 | 24.3°C | 18.7°C | 13.2°C | 29.1°C | 8.5°C | 82 mm | 73% | 2.1 m/s | 5.5 |
| 2007 | 27.2°C | 21.1°C | 14.9°C | 34.8°C | 8.5°C | 37 mm | 65% | 2.3 m/s | 5.2 |
| 2006 | 26.0°C | 20.2°C | 14.4°C | 35.1°C | 8.2°C | 41 mm | 67% | 2.2 m/s | 5.4 |
| 2005 | 27.5°C | 21.5°C | 15.5°C | 33.2°C | 10.6°C | 83 mm | 67% | 2.3 m/s | 5.1 |
| 2004 | 23.6°C | 18.2°C | 12.8°C | 28.2°C | 7.7°C | 57 mm | 72% | 2.2 m/s | 4.7 |
| 2003 | 26.2°C | 20.7°C | 15.3°C | 31.9°C | 10.0°C | 71 mm | 71% | 2 m/s | 5.3 |
| 2002 | 27.8°C | 21.4°C | 14.9°C | 34.1°C | 10.1°C | 35 mm | 62% | 2.2 m/s | 5.8 |
| 2001 | 27.9°C | 21.8°C | 15.7°C | 35.7°C | 11.2°C | 66 mm | 64% | 2.2 m/s | 5.4 |
| 2000 | 24.2°C | 18.8°C | 13.4°C | 29.1°C | 6.2°C | 65 mm | 76% | 2.1 m/s | 5.1 |
| 1999 | 24.8°C | 19.3°C | 13.7°C | 30.6°C | 7.9°C | 59 mm | 66% | 2.3 m/s | 4.9 |
| 1998 | 27.3°C | 21.3°C | 15.3°C | 32.0°C | 8.4°C | 66 mm | 64% | 1.9 m/s | 5.3 |
| 1997 | 23.9°C | 18.2°C | 12.5°C | 30.2°C | 9.3°C | 88 mm | 69% | 2.3 m/s | 4.6 |
| 1996 | 26.5°C | 20.1°C | 13.7°C | 31.4°C | 9.1°C | 45 mm | 69% | 1.9 m/s | 5.6 |
| 1995 | 28.0°C | 21.9°C | 15.9°C | 32.8°C | 8.2°C | 83 mm | 66% | 2.2 m/s | 5.1 |
| 1994 | 24.9°C | 18.8°C | 12.7°C | 29.0°C | 8.2°C | 52 mm | 68% | 2.2 m/s | 5.2 |
| 1993 | 27.7°C | 21.5°C | 15.3°C | 33.0°C | 10.2°C | 44 mm | 62% | 1.9 m/s | 5.6 |
| 1992 | 23.3°C | 17.6°C | 11.9°C | 29.3°C | 8.4°C | 105 mm | 72% | 2.4 m/s | 5.1 |
| 1991 | 26.5°C | 20.8°C | 15.2°C | 33.2°C | 10.0°C | 59 mm | 67% | 2.2 m/s | 5.3 |
| 1990 | 26.9°C | 20.8°C | 14.7°C | 31.2°C | 10.6°C | 52 mm | 66% | 2.1 m/s | 5 |
| 1989 | 26.7°C | 20.4°C | 14.1°C | 33.2°C | 8.7°C | 30 mm | 62% | 2.3 m/s | 5 |
| 1988 | 27.9°C | 21.8°C | 15.7°C | 34.8°C | 8.6°C | 47 mm | 63% | 2.5 m/s | 5.2 |
| 1987 | 26.6°C | 20.5°C | 14.4°C | 34.2°C | 9.4°C | 32 mm | 59% | 2.7 m/s | 4.9 |
| 1986 | 24.2°C | 18.5°C | 12.8°C | 31.2°C | 4.6°C | 78 mm | 67% | 2.3 m/s | 5.1 |
| 1985 | 25.3°C | 19.2°C | 13.1°C | 32.2°C | 7.5°C | 101 mm | 66% | 2.1 m/s | 5 |
| 1984 | 27.5°C | 21.3°C | 15.0°C | 31.9°C | 8.5°C | 51 mm | 65% | 2 m/s | 5.4 |
| 1983 | 27.5°C | 21.3°C | 15.2°C | 32.7°C | 9.1°C | 65 mm | 66% | 2 m/s | — |
| 1982 ❄️ | 23.5°C | 17.6°C | 11.8°C | 30.1°C | 3.2°C | 87 mm | 68% | 2.3 m/s | — |
| 1981 🌧️ | 25.5°C | 19.8°C | 14.2°C | 30.3°C | 8.5°C | 107 mm | 68% | 2 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 26.3°C with lows near 14.5°C (mean 20.4°C), based on 45 years of NASA POWER data.
August averages 65 mm of rainfall in Caledon, about average for rainfall. The wettest on record was 107 mm in 1981.
The hottest August reached 35.7°C in 2001. The coldest dipped to 3.2°C in 1982.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 1.4°C. Daytime highs moved from 25.9°C to 27.2°C and overnight lows from 13.9°C to 15.3°C over the same span.
August is one of the warmer months of the year in Caledon and about average for rainfall, so plan for around 26.3°C daytime highs and 14.5°C at night.
Not quite — August is the 11th coolest month in Caledon, averaging 20.4°C.
For August in Caledon, pack light layers you can adjust through the day, with typical highs of 26.3°C and lows of 14.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 67% — moderately humid.
Average wind speed in August is 2.2 m/s. The windiest August on record averaged 2.7 m/s (1987).
The wettest August on record was 1981 with 107 mm. On average, August sees 65 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 Caledon 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.
