August is one of the warmer months of the year in Riverdale, with average highs near 32.6°C and lows around 20.7°C (mean 26.7°C). It is about average for rainfall, averaging 102 mm of rainfall and 70% relative humidity across the period.
August is one of the warmer months of the year in Riverdale. Across 45 years of records, the warmest August in Riverdale was 2007 — when the month averaged 29.9°C — while the coldest was 1994 at 23.8°C. Typical August days reach 32.6°C with nights near 20.7°C. The long-term trend is warming, about 0.2°C per decade.
August is about average for rainfall in Riverdale, averaging 102 mm of rainfall. The wettest August on record was 1992 with 186 mm, while the driest was 1997 at 41 mm.
Relative humidity in Riverdale during August averages 70%. The most humid August was 2013 at 83%, and the least humid was 1999 at 56%.
August receives about 5.4 kWh/m²/day of solar energy in Riverdale. The sunniest August was 2024 at 6.6 kWh/m²/day, and the cloudiest was 1992 at 4.8.
Average wind speed in Riverdale during August is 1 m/s. The windiest August was 1995 at 1.4 m/s, while the calmest were 1990 and 2003 at 0.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 26.3°C | 26.3°C | 26.9°C | 27.0°C | 27.0°C | +0.7°C |
| Avg High | 32.1°C | 32.2°C | 32.9°C | 32.9°C | 33.1°C | +1°C |
| Avg Low | 20.4°C | 20.3°C | 20.8°C | 21.1°C | 20.9°C | +0.5°C |
| Avg Rain | 91 mm | 104 mm | 101 mm | 97 mm | 127 mm | +36 mm |
August temperatures in Riverdale have risen by about 1°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 12.4°C (1992) to a record high of 41.2°C (1995).
Rainfall in August is about average for rainfall, averaging 102 mm, with a wettest year of 186 mm.
A good time to visit Riverdale
August is a good time to visit Riverdale, with days averaging 32.6°C and nights around 20.7°C (mean 26.7°C, warmer than Riverdale's yearly average) and higher rainfall. May and September 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 | 31.2°C | 25.6°C | 20.1°C | 36.1°C | 13.5°C | 122 mm | 74% | 1.1 m/s | 4.9 |
| 2024 | 34.6°C | 27.6°C | 20.5°C | 37.7°C | 15.8°C | 43 mm | 65% | 1.1 m/s | 6.6 |
| 2023 | 35.1°C | 28.2°C | 21.3°C | 39.1°C | 18.0°C | 137 mm | 68% | 1 m/s | 5.8 |
| 2022 | 32.1°C | 26.5°C | 20.9°C | 35.4°C | 18.9°C | 127 mm | 74% | 0.9 m/s | 5.3 |
| 2021 | 32.4°C | 26.8°C | 21.2°C | 36.6°C | 18.3°C | 169 mm | 74% | 0.9 m/s | 5.4 |
| 2020 | 32.9°C | 27.1°C | 21.3°C | 37.1°C | 18.2°C | 162 mm | 72% | 0.9 m/s | 5.4 |
| 2019 | 34.9°C | 28.2°C | 21.5°C | 38.5°C | 17.3°C | 78 mm | 65% | 0.9 m/s | 6 |
| 2018 | 31.1°C | 25.8°C | 20.5°C | 34.5°C | 15.9°C | 124 mm | 76% | 0.9 m/s | 5.7 |
| 2017 | 31.7°C | 26.2°C | 20.7°C | 36.0°C | 18.3°C | 116 mm | 71% | 1 m/s | 5.3 |
| 2016 | 34.6°C | 28.5°C | 22.3°C | 38.1°C | 20.6°C | 79 mm | 68% | 1.1 m/s | 5.7 |
| 2015 | 32.9°C | 26.9°C | 20.9°C | 38.0°C | 14.0°C | 126 mm | 69% | 1.1 m/s | 5.7 |
| 2014 | 33.1°C | 26.6°C | 20.2°C | 36.8°C | 15.7°C | 75 mm | 66% | 0.9 m/s | 6 |
| 2013 | 29.0°C | 24.6°C | 20.1°C | 32.2°C | 15.1°C | 109 mm | 83% | 1 m/s | 5 |
| 2012 | 32.1°C | 26.1°C | 20.2°C | 37.0°C | 15.8°C | 101 mm | 72% | 1 m/s | 5.2 |
| 2011 | 35.5°C | 28.7°C | 21.8°C | 38.3°C | 17.9°C | 44 mm | 61% | 1.1 m/s | 6 |
| 2010 | 33.8°C | 28.3°C | 22.8°C | 37.5°C | 18.6°C | 114 mm | 73% | 0.9 m/s | 5.6 |
| 2009 | 32.0°C | 26.2°C | 20.3°C | 36.7°C | 16.0°C | 124 mm | 73% | 1 m/s | 5.3 |
| 2008 | 32.4°C | 26.4°C | 20.4°C | 37.4°C | 16.2°C | 127 mm | 70% | 1.3 m/s | 5.2 |
| 2007 🔥 | 36.7°C | 29.9°C | 23.1°C | 40.8°C | 20.7°C | 88 mm | 60% | 0.9 m/s | 5.8 |
| 2006 | 34.9°C | 28.6°C | 22.3°C | 38.0°C | 18.9°C | 107 mm | 67% | 0.9 m/s | 5.2 |
| 2005 | 30.5°C | 25.8°C | 21.1°C | 34.4°C | 17.4°C | 149 mm | 81% | 1 m/s | 5.1 |
| 2004 | 32.0°C | 25.4°C | 18.9°C | 36.8°C | 13.3°C | 84 mm | 67% | 0.9 m/s | 5.6 |
| 2003 | 30.3°C | 25.6°C | 21.0°C | 32.2°C | 18.9°C | 93 mm | 82% | 0.8 m/s | 5.3 |
| 2002 | 34.3°C | 27.4°C | 20.6°C | 38.0°C | 17.1°C | 48 mm | 62% | 1.1 m/s | 5.7 |
| 2001 | 32.6°C | 26.5°C | 20.4°C | 35.3°C | 15.7°C | 59 mm | 69% | 1 m/s | 5.2 |
| 2000 | 33.7°C | 27.0°C | 20.3°C | 40.0°C | 16.0°C | 129 mm | 62% | 1 m/s | 5.7 |
| 1999 | 36.2°C | 28.5°C | 20.8°C | 40.3°C | 16.4°C | 58 mm | 56% | 1.1 m/s | 6.2 |
| 1998 | 32.8°C | 26.2°C | 19.6°C | 36.9°C | 14.8°C | 111 mm | 65% | 1 m/s | 5.7 |
| 1997 | 31.6°C | 25.5°C | 19.4°C | 35.7°C | 13.9°C | 41 mm | 69% | 1.1 m/s | 5.6 |
| 1996 | 32.4°C | 26.5°C | 20.5°C | 35.0°C | 17.7°C | 98 mm | 69% | 0.9 m/s | 5.2 |
| 1995 | 34.0°C | 28.1°C | 22.2°C | 41.2°C | 19.3°C | 134 mm | 69% | 1.4 m/s | 5.1 |
| 1994 ❄️ | 28.5°C | 23.8°C | 19.1°C | 32.1°C | 15.7°C | 135 mm | 81% | 1 m/s | 5.3 |
| 1993 | 33.9°C | 27.6°C | 21.2°C | 37.5°C | 18.1°C | 70 mm | 65% | 1.1 m/s | 5.3 |
| 1992 🌧️ | 29.5°C | 24.3°C | 19.1°C | 34.7°C | 12.4°C | 186 mm | 76% | 1 m/s | 4.8 |
| 1991 | 29.0°C | 24.5°C | 20.0°C | 32.5°C | 14.1°C | 116 mm | 82% | 1 m/s | 5.1 |
| 1990 | 34.3°C | 27.9°C | 21.5°C | 38.1°C | 17.9°C | 93 mm | 64% | 0.8 m/s | 5.5 |
| 1989 | 29.7°C | 24.7°C | 19.7°C | 32.6°C | 13.8°C | 73 mm | 78% | 0.9 m/s | 5.6 |
| 1988 | 33.7°C | 27.6°C | 21.5°C | 38.1°C | 16.8°C | 98 mm | 68% | 1 m/s | 5.2 |
| 1987 | 34.7°C | 28.2°C | 21.7°C | 37.9°C | 18.7°C | 71 mm | 65% | 1 m/s | 5.5 |
| 1986 | 32.3°C | 26.4°C | 20.5°C | 39.1°C | 12.6°C | 126 mm | 68% | 1.2 m/s | 4.9 |
| 1985 | 30.9°C | 25.3°C | 19.6°C | 34.6°C | 14.5°C | 105 mm | 75% | 1.1 m/s | 5.2 |
| 1984 | 29.1°C | 24.4°C | 19.6°C | 32.0°C | 16.8°C | 91 mm | 82% | 0.9 m/s | 4.9 |
| 1983 | 35.2°C | 28.5°C | 21.8°C | 41.1°C | 16.0°C | 68 mm | 61% | 0.9 m/s | — |
| 1982 | 31.1°C | 25.4°C | 19.7°C | 35.1°C | 16.8°C | 88 mm | 74% | 1 m/s | — |
| 1981 | 32.1°C | 26.0°C | 19.8°C | 37.5°C | 16.8°C | 99 mm | 68% | 0.9 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 32.6°C with lows near 20.7°C (mean 26.7°C), based on 45 years of NASA POWER data.
August averages 102 mm of rainfall in Riverdale, about average for rainfall. The wettest on record was 186 mm in 1992.
The hottest August reached 41.2°C in 1995. The coldest dipped to 12.4°C in 1992.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 1°C. Daytime highs moved from 31.7°C to 33.1°C and overnight lows from 20.1°C to 20.8°C over the same span.
August is one of the warmer months of the year in Riverdale and about average for rainfall, so plan for around 32.6°C daytime highs and 20.7°C at night.
Not quite — August is the 11th coolest month in Riverdale, averaging 26.7°C.
For August in Riverdale, pack light, breathable clothing and sun protection, with typical highs of 32.6°C and lows of 20.7°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 70% — moderately humid.
Average wind speed in August is 1 m/s. The windiest August on record averaged 1.4 m/s (1995).
The wettest August on record was 1992 with 186 mm. On average, August sees 102 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 Riverdale 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.
