August is one of the warmer months of the year in Manhattan, with average highs near 32.2°C and lows around 20°C (mean 26.1°C). It is a relatively wet time of year, averaging 106 mm of rainfall and 63% relative humidity across the period.
August is one of the warmer months of the year in Manhattan. Across 45 years of records, the warmest Augusts in Manhattan were 1983 and 2000 — when the month averaged 30.8°C — while the coldest was 1992 at 21.7°C. Typical August days reach 32.2°C with nights near 20°C. The long-term August temperature trend is broadly flat.
August is a relatively wet time of year in Manhattan, averaging 106 mm of rainfall. The wettest August on record was 2019 with 229 mm, while the driest was 2000 at 18 mm.
Relative humidity in Manhattan during August averages 63%. The most humid August was 2019 at 84%, and the least humid was 2000 at 43%.
August receives about 5.8 kWh/m²/day of solar energy in Manhattan. The sunniest Augusts were 2010 and 2020 at 6.4 kWh/m²/day, and the cloudiest was 2019 at 5.1.
Average wind speed in Manhattan during August is 2.8 m/s. The windiest August was 2021 at 3.4 m/s, while the calmest was 1996 at 2.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 26.1°C | 25.2°C | 26.7°C | 25.9°C | 27.1°C | +1°C |
| Avg High | 32.3°C | 31.0°C | 32.9°C | 31.8°C | 33.6°C | +1.3°C |
| Avg Low | 19.9°C | 19.3°C | 20.5°C | 20.0°C | 20.8°C | +0.9°C |
| Avg Rain | 108 mm | 102 mm | 108 mm | 126 mm | 74 mm | -34 mm |
August temperatures in Manhattan have risen by about 0.9°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 9.8°C (2009) to a record high of 44.3°C (2023).
Rainfall in August is a relatively wet time of year, averaging 106 mm, with a wettest year of 229 mm.
One of the best times to visit Manhattan
August is one of the best times to visit Manhattan. Expect days averaging 32.2°C and nights around 20°C (mean 26.1°C) — warmer than Manhattan's yearly average — with higher rainfall (106 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 | 31.7°C | 26.0°C | 20.4°C | 39.1°C | 15.0°C | 88 mm | 63% | 2.7 m/s | 5.4 |
| 2024 | 33.4°C | 27.0°C | 20.6°C | 41.1°C | 15.2°C | 103 mm | 57% | 2.5 m/s | 5.6 |
| 2023 | 35.5°C | 28.4°C | 21.3°C | 44.3°C | 15.1°C | 77 mm | 54% | 2.6 m/s | 6.2 |
| 2022 | 35.3°C | 28.2°C | 21.1°C | 39.7°C | 18.0°C | 47 mm | 53% | 2.6 m/s | 6.2 |
| 2021 | 34.3°C | 28.1°C | 22.0°C | 39.9°C | 16.3°C | 75 mm | 61% | 3.4 m/s | 6 |
| 2020 | 31.1°C | 25.1°C | 19.2°C | 36.7°C | 12.9°C | 53 mm | 66% | 2.7 m/s | 6.4 |
| 2019 🌧️ | 28.8°C | 24.5°C | 20.2°C | 33.5°C | 15.2°C | 229 mm | 84% | 2.5 m/s | 5.1 |
| 2018 | 31.3°C | 25.6°C | 19.9°C | 37.5°C | 15.4°C | 154 mm | 66% | 3 m/s | 5.5 |
| 2017 | 30.5°C | 24.1°C | 17.8°C | 37.1°C | 14.0°C | 95 mm | 62% | 2.5 m/s | 5.9 |
| 2016 | 30.2°C | 25.1°C | 20.0°C | 36.2°C | 12.9°C | 150 mm | 72% | 2.7 m/s | 5.5 |
| 2015 | 31.0°C | 24.9°C | 18.9°C | 35.0°C | 12.6°C | 93 mm | 65% | 2.7 m/s | 5.9 |
| 2014 | 34.3°C | 27.8°C | 21.3°C | 38.4°C | 14.0°C | 116 mm | 56% | 2.9 m/s | 5.8 |
| 2013 | 29.3°C | 24.3°C | 19.3°C | 36.0°C | 13.5°C | 141 mm | 77% | 2.6 m/s | 5.6 |
| 2012 | 32.9°C | 26.0°C | 19.1°C | 40.0°C | 13.6°C | 104 mm | 48% | 2.7 m/s | 5.9 |
| 2011 | 35.1°C | 28.5°C | 21.9°C | 43.7°C | 17.0°C | 104 mm | 58% | 2.5 m/s | 6.1 |
| 2010 | 34.7°C | 28.0°C | 21.2°C | 41.3°C | 13.0°C | 76 mm | 58% | 3.1 m/s | 6.4 |
| 2009 | 30.0°C | 24.1°C | 18.2°C | 37.4°C | 9.8°C | 117 mm | 67% | 3.2 m/s | 5.9 |
| 2008 | 30.1°C | 24.4°C | 18.7°C | 40.6°C | 14.7°C | 115 mm | 70% | 2.7 m/s | 5.7 |
| 2007 | 33.7°C | 28.1°C | 22.5°C | 39.4°C | 16.2°C | 80 mm | 68% | 3.3 m/s | 6 |
| 2006 | 32.7°C | 26.7°C | 20.7°C | 42.0°C | 14.8°C | 166 mm | 63% | 2.7 m/s | 5.6 |
| 2005 | 31.5°C | 25.9°C | 20.4°C | 39.2°C | 15.3°C | 188 mm | 68% | 2.5 m/s | 5.4 |
| 2004 | 29.4°C | 23.4°C | 17.3°C | 36.5°C | 11.1°C | 65 mm | 66% | 2.8 m/s | 6 |
| 2003 | 35.6°C | 28.9°C | 22.3°C | 41.5°C | 16.7°C | 134 mm | 48% | 2.8 m/s | 5.6 |
| 2002 | 33.8°C | 27.3°C | 20.7°C | 39.0°C | 14.0°C | 83 mm | 55% | 3.1 m/s | 5.6 |
| 2001 | 33.9°C | 27.4°C | 20.8°C | 39.4°C | 13.7°C | 110 mm | 53% | 2.8 m/s | 6.3 |
| 2000 | 38.4°C | 30.8°C | 23.1°C | 41.9°C | 16.4°C | 18 mm | 43% | 3.2 m/s | 5.8 |
| 1999 | 31.9°C | 25.4°C | 18.9°C | 38.5°C | 14.3°C | 82 mm | 63% | 2.8 m/s | 5.8 |
| 1998 | 32.2°C | 26.2°C | 20.1°C | 39.2°C | 16.3°C | 63 mm | 63% | 2.7 m/s | 5.9 |
| 1997 | 30.8°C | 24.9°C | 19.0°C | 36.4°C | 14.4°C | 126 mm | 67% | 2.6 m/s | 5.7 |
| 1996 | 29.8°C | 24.7°C | 19.5°C | 37.8°C | 16.3°C | 167 mm | 70% | 2.3 m/s | 5.2 |
| 1995 | 31.1°C | 25.8°C | 20.5°C | 35.2°C | 15.1°C | 116 mm | 75% | 3 m/s | 6 |
| 1994 | 33.1°C | 26.4°C | 19.6°C | 39.3°C | 14.1°C | 62 mm | 55% | 3.3 m/s | 5.6 |
| 1993 | 28.8°C | 24.1°C | 19.3°C | 33.6°C | 11.7°C | 132 mm | 82% | 2.8 m/s | 5.5 |
| 1992 ❄️ | 26.9°C | 21.7°C | 16.5°C | 31.6°C | 11.6°C | 92 mm | 76% | 2.5 m/s | 5.7 |
| 1991 | 33.5°C | 26.7°C | 20.0°C | 40.5°C | 15.8°C | 67 mm | 51% | 2.8 m/s | 5.7 |
| 1990 | 31.8°C | 25.7°C | 19.6°C | 40.6°C | 12.4°C | 114 mm | 65% | 3 m/s | 6.2 |
| 1989 | 31.0°C | 25.4°C | 19.8°C | 39.1°C | 12.7°C | 143 mm | 66% | 2.9 m/s | 5.7 |
| 1988 | 35.3°C | 28.5°C | 21.7°C | 40.6°C | 11.9°C | 60 mm | 49% | 3.2 m/s | 6.1 |
| 1987 | 31.5°C | 25.3°C | 19.1°C | 41.8°C | 13.0°C | 153 mm | 64% | 3.3 m/s | 5.4 |
| 1986 | 28.9°C | 23.2°C | 17.5°C | 32.7°C | 12.0°C | 154 mm | 68% | 2.9 m/s | 5.2 |
| 1985 | 29.6°C | 23.6°C | 17.6°C | 37.3°C | 12.6°C | 164 mm | 73% | 3.1 m/s | 5.2 |
| 1984 | 35.4°C | 28.2°C | 21.1°C | 42.1°C | 15.9°C | 51 mm | 48% | 3.1 m/s | 6.1 |
| 1983 🔥 | 37.6°C | 30.8°C | 24.0°C | 42.5°C | 19.9°C | 44 mm | 47% | 3.1 m/s | — |
| 1982 | 31.8°C | 26.1°C | 20.3°C | 37.1°C | 14.5°C | 85 mm | 68% | 3.2 m/s | — |
| 1981 | 30.0°C | 24.2°C | 18.4°C | 35.7°C | 13.0°C | 121 mm | 68% | 2.7 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 32.2°C with lows near 20°C (mean 26.1°C), based on 45 years of NASA POWER data.
August averages 106 mm of rainfall in Manhattan, a relatively wet time of year. The wettest on record was 229 mm in 2019.
The hottest August reached 44.3°C in 2023. The coldest dipped to 9.8°C in 2009.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 0.9°C. Daytime highs moved from 32.9°C to 34°C and overnight lows from 20.3°C to 21.1°C over the same span.
August is one of the warmer months of the year in Manhattan and a relatively wet time of year, so plan for around 32.2°C daytime highs and 20°C at night.
Not quite — August is the 11th coolest month in Manhattan, averaging 26.1°C.
For August in Manhattan, pack light, breathable clothing and sun protection, with typical highs of 32.2°C and lows of 20°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 63% — moderately humid.
Average wind speed in August is 2.8 m/s. The windiest August on record averaged 3.4 m/s (2021).
The wettest August on record was 2019 with 229 mm. On average, August sees 106 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 Manhattan 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.
