August is one of the warmer months of the year in Cleveland, with average highs near 32.5°C and lows around 20°C (mean 26.3°C). It is one of the drier months, averaging 99 mm of rainfall and 69% relative humidity across the period.
August is one of the warmer months of the year in Cleveland. Across 45 years of records, the warmest August in Cleveland was 2007 — when the month averaged 29.6°C — while the coldest was 1992 at 24.2°C. Typical August days reach 32.5°C with nights near 20°C. The long-term trend is warming, about 0.2°C per decade.
August is one of the drier months in Cleveland, averaging 99 mm of rainfall. The wettest August on record was 2021 with 248 mm, while the driest was 2011 at 21 mm.
Relative humidity in Cleveland during August averages 69%. The most humid August was 2013 at 82%, and the least humid was 1999 at 57%.
August receives about 5.5 kWh/m²/day of solar energy in Cleveland. The sunniest August was 2024 at 6.4 kWh/m²/day, and the cloudiest was 1985 at 4.6.
Average wind speed in Cleveland during August is 0.4 m/s. The windiest August was 1999 at 0.5 m/s, while the calmest were 2023, 2024 and 2025, among others at 0.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 25.9°C | 26.0°C | 26.7°C | 26.4°C | 26.4°C | +0.5°C |
| Avg High | 32.1°C | 32.4°C | 33.1°C | 32.5°C | 32.7°C | +0.6°C |
| Avg Low | 19.7°C | 19.6°C | 20.3°C | 20.3°C | 20.2°C | +0.5°C |
| Avg Rain | 104 mm | 86 mm | 87 mm | 99 mm | 134 mm | +30 mm |
August temperatures in Cleveland have risen by about 0.8°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 10.8°C (1986) to a record high of 41.3°C (1983).
Rainfall in August is one of the drier months, averaging 99 mm, with a wettest year of 248 mm.
One of the best times to visit Cleveland
August is one of the best times to visit Cleveland. Expect days averaging 32.5°C and nights around 20°C (mean 26.3°C) — warmer than Cleveland's yearly average — with higher rainfall (99 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 | 32.2°C | 25.8°C | 19.5°C | 36.9°C | 12.7°C | 99 mm | 68% | 0.4 m/s | 5.4 |
| 2024 | 34.7°C | 27.3°C | 19.8°C | 38.7°C | 14.5°C | 48 mm | 62% | 0.4 m/s | 6.4 |
| 2023 | 32.9°C | 26.7°C | 20.6°C | 38.1°C | 15.8°C | 150 mm | 73% | 0.4 m/s | 5.6 |
| 2022 | 32.1°C | 26.2°C | 20.3°C | 36.2°C | 17.8°C | 117 mm | 73% | 0.4 m/s | 5.5 |
| 2021 🌧️ | 31.8°C | 26.1°C | 20.4°C | 36.6°C | 17.5°C | 248 mm | 75% | 0.4 m/s | 5.3 |
| 2020 | 32.2°C | 26.4°C | 20.6°C | 36.1°C | 17.1°C | 140 mm | 74% | 0.4 m/s | 5.4 |
| 2019 | 33.9°C | 27.3°C | 20.7°C | 38.2°C | 15.3°C | 74 mm | 67% | 0.4 m/s | 6 |
| 2018 | 31.0°C | 25.7°C | 20.4°C | 34.3°C | 14.3°C | 148 mm | 76% | 0.4 m/s | 5.5 |
| 2017 | 31.5°C | 25.6°C | 19.7°C | 36.0°C | 16.2°C | 104 mm | 70% | 0.4 m/s | 5.5 |
| 2016 | 34.8°C | 28.4°C | 22.0°C | 37.4°C | 16.8°C | 73 mm | 66% | 0.4 m/s | 5.7 |
| 2015 | 30.6°C | 24.9°C | 19.2°C | 36.6°C | 12.9°C | 139 mm | 75% | 0.4 m/s | 5.4 |
| 2014 | 32.4°C | 26.0°C | 19.7°C | 36.7°C | 14.9°C | 121 mm | 69% | 0.4 m/s | 5.6 |
| 2013 | 29.2°C | 24.3°C | 19.5°C | 33.0°C | 15.8°C | 129 mm | 82% | 0.4 m/s | 5 |
| 2012 | 31.5°C | 25.3°C | 19.1°C | 35.9°C | 14.1°C | 98 mm | 71% | 0.4 m/s | 5.6 |
| 2011 | 35.2°C | 27.9°C | 20.7°C | 39.1°C | 15.7°C | 21 mm | 60% | 0.4 m/s | 6.1 |
| 2010 | 34.9°C | 28.6°C | 22.3°C | 39.9°C | 17.9°C | 90 mm | 69% | 0.4 m/s | 5.7 |
| 2009 | 31.6°C | 25.6°C | 19.6°C | 35.7°C | 14.7°C | 100 mm | 73% | 0.4 m/s | 5.6 |
| 2008 | 32.8°C | 26.0°C | 19.3°C | 37.1°C | 14.8°C | 123 mm | 64% | 0.4 m/s | 5.6 |
| 2007 🔥 | 36.6°C | 29.6°C | 22.7°C | 39.9°C | 19.9°C | 38 mm | 58% | 0.4 m/s | 5.9 |
| 2006 | 34.8°C | 28.3°C | 21.9°C | 38.2°C | 18.4°C | 101 mm | 66% | 0.4 m/s | 5.3 |
| 2005 | 33.1°C | 27.1°C | 21.2°C | 37.1°C | 19.0°C | 96 mm | 71% | 0.4 m/s | 5.3 |
| 2004 | 30.9°C | 24.5°C | 18.1°C | 35.7°C | 12.5°C | 84 mm | 70% | 0.4 m/s | 5.4 |
| 2003 | 31.0°C | 25.9°C | 20.7°C | 34.4°C | 17.9°C | 89 mm | 80% | 0.4 m/s | 5.5 |
| 2002 | 34.3°C | 27.2°C | 20.2°C | 37.8°C | 15.9°C | 66 mm | 61% | 0.4 m/s | 5.8 |
| 2001 | 31.8°C | 25.8°C | 19.9°C | 34.8°C | 14.7°C | 89 mm | 71% | 0.4 m/s | 5 |
| 2000 | 33.9°C | 26.8°C | 19.7°C | 38.9°C | 14.7°C | 81 mm | 62% | 0.4 m/s | 5.6 |
| 1999 | 34.7°C | 27.0°C | 19.4°C | 38.4°C | 14.1°C | 33 mm | 57% | 0.5 m/s | 6.2 |
| 1998 | 33.3°C | 26.4°C | 19.4°C | 36.9°C | 15.8°C | 84 mm | 64% | 0.4 m/s | 5.8 |
| 1997 | 31.9°C | 25.3°C | 18.7°C | 35.6°C | 12.4°C | 56 mm | 67% | 0.4 m/s | 5.6 |
| 1996 | 31.8°C | 25.5°C | 19.3°C | 34.5°C | 16.4°C | 81 mm | 70% | 0.4 m/s | 5.4 |
| 1995 | 34.3°C | 28.0°C | 21.7°C | 39.3°C | 19.4°C | 106 mm | 68% | 0.4 m/s | 5.3 |
| 1994 | 29.8°C | 24.3°C | 18.8°C | 33.9°C | 15.3°C | 94 mm | 77% | 0.4 m/s | 5.2 |
| 1993 | 33.9°C | 27.3°C | 20.8°C | 37.5°C | 17.5°C | 78 mm | 65% | 0.4 m/s | 5.3 |
| 1992 ❄️ | 29.9°C | 24.2°C | 18.5°C | 34.6°C | 12.2°C | 132 mm | 73% | 0.4 m/s | 4.7 |
| 1991 | 30.7°C | 25.1°C | 19.6°C | 35.9°C | 14.7°C | 104 mm | 75% | 0.4 m/s | 5.4 |
| 1990 | 33.4°C | 26.8°C | 20.1°C | 37.9°C | 16.8°C | 88 mm | 65% | 0.4 m/s | 5.4 |
| 1989 | 29.7°C | 24.4°C | 19.2°C | 34.9°C | 11.3°C | 82 mm | 78% | 0.4 m/s | 5.4 |
| 1988 | 34.1°C | 27.4°C | 20.6°C | 38.5°C | 15.3°C | 112 mm | 66% | 0.4 m/s | 5.1 |
| 1987 | 34.6°C | 27.7°C | 20.9°C | 37.6°C | 15.9°C | 76 mm | 62% | 0.4 m/s | 5.2 |
| 1986 | 31.7°C | 25.6°C | 19.4°C | 36.5°C | 10.8°C | 118 mm | 67% | 0.4 m/s | 5 |
| 1985 | 30.4°C | 24.8°C | 19.2°C | 34.5°C | 15.4°C | 154 mm | 74% | 0.4 m/s | 4.6 |
| 1984 | 29.9°C | 24.4°C | 19.0°C | 32.7°C | 14.5°C | 77 mm | 78% | 0.4 m/s | 4.9 |
| 1983 | 34.9°C | 28.1°C | 21.3°C | 41.3°C | 16.3°C | 61 mm | 61% | 0.4 m/s | — |
| 1982 | 31.2°C | 24.9°C | 18.6°C | 36.4°C | 13.7°C | 130 mm | 72% | 0.4 m/s | — |
| 1981 | 32.2°C | 25.6°C | 19.0°C | 37.5°C | 14.5°C | 123 mm | 68% | 0.4 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 32.5°C with lows near 20°C (mean 26.3°C), based on 45 years of NASA POWER data.
August averages 99 mm of rainfall in Cleveland, one of the drier months. The wettest on record was 248 mm in 2021.
The hottest August reached 41.3°C in 1983. The coldest dipped to 10.8°C in 1986.
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 31.7°C to 32.7°C and overnight lows from 19.4°C to 20.1°C over the same span.
August is one of the warmer months of the year in Cleveland and one of the drier months, so plan for around 32.5°C daytime highs and 20°C at night.
Not quite — August is the 11th coolest month in Cleveland, averaging 26.3°C.
For August in Cleveland, pack light, breathable clothing and sun protection, with typical highs of 32.5°C and lows of 20°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 69% — moderately humid.
Average wind speed in August is 0.4 m/s. The windiest August on record averaged 0.5 m/s (1999).
The wettest August on record was 2021 with 248 mm. On average, August sees 99 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 Cleveland 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.
