August is one of the warmer months of the year in Rochester, with average highs near 27.1°C and lows around 15.8°C (mean 21.5°C). It is a relatively wet time of year, averaging 87 mm of rainfall and 69% relative humidity across the period.
August is one of the warmer months of the year in Rochester. Across 45 years of records, the warmest August in Rochester was 2016 — when the month averaged 24.5°C — while the coldest was 1992 at 18.5°C. Typical August days reach 27.1°C with nights near 15.8°C. The long-term trend is warming, about 0.4°C per decade.
August is a relatively wet time of year in Rochester, averaging 87 mm of rainfall. The wettest August on record was 2024 with 143 mm, while the driest was 2002 at 42 mm.
Relative humidity in Rochester during August averages 69%. The most humid August was 2018 at 77%, and the least humid was 2025 at 62%.
August receives about 5.1 kWh/m²/day of solar energy in Rochester. The sunniest Augusts were 2016, 2019 and 2020, among others at 5.5 kWh/m²/day, and the cloudiest were 1987, 1988 and 2004 at 4.6.
Average wind speed in Rochester during August is 0.4 m/s. The windiest Augusts were 2023, 2024 and 2025, among others at 0.5 m/s, while the calmest were 2018, 2021 and 2022, 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 | 20.8°C | 21.0°C | 21.7°C | 21.8°C | 22.3°C | +1.5°C |
| Avg High | 26.5°C | 26.8°C | 27.3°C | 27.4°C | 27.9°C | +1.4°C |
| Avg Low | 15.1°C | 15.2°C | 16.2°C | 16.3°C | 16.7°C | +1.6°C |
| Avg Rain | 89 mm | 77 mm | 85 mm | 89 mm | 103 mm | +14 mm |
August temperatures in Rochester have risen by about 1.3°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 5.5°C (1982) to a record high of 36.5°C (1988).
Rainfall in August is a relatively wet time of year, averaging 87 mm, with a wettest year of 143 mm.
One of the best times to visit Rochester
August is one of the best times to visit Rochester. Expect days averaging 27.1°C and nights around 15.8°C (mean 21.5°C) — warmer than Rochester's yearly average — with higher rainfall (87 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 | 28.1°C | 21.8°C | 15.6°C | 36.4°C | 9.6°C | 63 mm | 62% | 0.5 m/s | 5.4 |
| 2024 🌧️ | 26.9°C | 21.6°C | 16.2°C | 33.7°C | 11.3°C | 143 mm | 74% | 0.5 m/s | 4.7 |
| 2023 | 26.3°C | 20.9°C | 15.6°C | 29.9°C | 10.6°C | 96 mm | 71% | 0.5 m/s | 5 |
| 2022 | 28.5°C | 22.8°C | 17.2°C | 34.6°C | 12.8°C | 105 mm | 70% | 0.4 m/s | 5.4 |
| 2021 | 28.8°C | 23.7°C | 18.6°C | 33.6°C | 12.3°C | 136 mm | 75% | 0.4 m/s | 5.3 |
| 2020 | 28.5°C | 22.8°C | 17.1°C | 33.4°C | 12.2°C | 72 mm | 69% | 0.5 m/s | 5.5 |
| 2019 | 26.8°C | 21.5°C | 16.2°C | 31.7°C | 12.4°C | 100 mm | 72% | 0.5 m/s | 5.5 |
| 2018 | 27.8°C | 22.9°C | 18.1°C | 34.2°C | 13.0°C | 123 mm | 77% | 0.4 m/s | 4.8 |
| 2017 | 26.0°C | 20.5°C | 15.0°C | 31.2°C | 9.3°C | 74 mm | 72% | 0.4 m/s | 5.2 |
| 2016 🔥 | 30.4°C | 24.5°C | 18.5°C | 35.4°C | 13.2°C | 98 mm | 67% | 0.4 m/s | 5.5 |
| 2015 | 27.1°C | 21.3°C | 15.4°C | 32.9°C | 11.2°C | 76 mm | 69% | 0.5 m/s | 5.2 |
| 2014 | 25.2°C | 19.9°C | 14.7°C | 31.4°C | 10.3°C | 84 mm | 76% | 0.4 m/s | 4.9 |
| 2013 | 26.3°C | 20.7°C | 15.2°C | 31.0°C | 11.5°C | 83 mm | 71% | 0.5 m/s | 5.4 |
| 2012 | 28.9°C | 22.6°C | 16.2°C | 34.8°C | 11.9°C | 53 mm | 63% | 0.5 m/s | 5.4 |
| 2011 | 27.2°C | 21.8°C | 16.5°C | 32.3°C | 11.6°C | 116 mm | 71% | 0.5 m/s | 4.9 |
| 2010 | 28.2°C | 22.5°C | 16.8°C | 34.0°C | 10.8°C | 86 mm | 69% | 0.4 m/s | 5 |
| 2009 | 26.7°C | 21.6°C | 16.4°C | 33.6°C | 10.4°C | 93 mm | 73% | 0.4 m/s | 5 |
| 2008 | 25.0°C | 19.9°C | 14.9°C | 30.4°C | 10.3°C | 99 mm | 73% | 0.5 m/s | 5.3 |
| 2007 | 28.5°C | 22.5°C | 16.5°C | 36.2°C | 10.9°C | 48 mm | 67% | 0.5 m/s | 5.2 |
| 2006 | 26.1°C | 21.0°C | 15.9°C | 33.5°C | 10.2°C | 97 mm | 71% | 0.5 m/s | 5.2 |
| 2005 | 29.5°C | 23.5°C | 17.6°C | 34.9°C | 13.1°C | 126 mm | 65% | 0.5 m/s | 5.1 |
| 2004 | 25.2°C | 20.3°C | 15.4°C | 31.4°C | 11.1°C | 93 mm | 76% | 0.4 m/s | 4.6 |
| 2003 | 27.2°C | 21.9°C | 16.7°C | 31.1°C | 10.9°C | 93 mm | 74% | 0.4 m/s | 5 |
| 2002 | 28.8°C | 22.5°C | 16.2°C | 35.7°C | 11.9°C | 42 mm | 63% | 0.4 m/s | 5.5 |
| 2001 | 29.7°C | 23.5°C | 17.2°C | 36.3°C | 12.0°C | 69 mm | 62% | 0.4 m/s | 5.2 |
| 2000 | 25.9°C | 20.5°C | 15.2°C | 32.9°C | 8.1°C | 87 mm | 72% | 0.5 m/s | 5.3 |
| 1999 | 26.0°C | 20.5°C | 15.0°C | 32.0°C | 9.6°C | 83 mm | 66% | 0.5 m/s | 4.9 |
| 1998 | 27.7°C | 22.2°C | 16.7°C | 32.8°C | 9.1°C | 68 mm | 68% | 0.4 m/s | 5 |
| 1997 | 25.9°C | 20.1°C | 14.4°C | 32.4°C | 10.9°C | 66 mm | 69% | 0.4 m/s | 4.9 |
| 1996 | 27.2°C | 21.2°C | 15.1°C | 33.2°C | 11.2°C | 55 mm | 70% | 0.4 m/s | 5.4 |
| 1995 | 29.0°C | 22.7°C | 16.5°C | 34.4°C | 9.9°C | 54 mm | 65% | 0.4 m/s | 4.8 |
| 1994 | 25.4°C | 19.7°C | 14.0°C | 30.3°C | 9.6°C | 123 mm | 71% | 0.4 m/s | 5 |
| 1993 | 28.2°C | 22.0°C | 15.8°C | 33.3°C | 8.9°C | 66 mm | 68% | 0.4 m/s | 5.2 |
| 1992 ❄️ | 23.8°C | 18.5°C | 13.2°C | 31.3°C | 9.3°C | 114 mm | 77% | 0.4 m/s | 5 |
| 1991 | 27.5°C | 21.6°C | 15.7°C | 33.8°C | 12.0°C | 71 mm | 67% | 0.4 m/s | 4.8 |
| 1990 | 27.1°C | 21.3°C | 15.5°C | 31.8°C | 11.5°C | 69 mm | 70% | 0.4 m/s | 4.8 |
| 1989 | 26.2°C | 20.5°C | 14.7°C | 31.1°C | 8.7°C | 74 mm | 68% | 0.4 m/s | 4.8 |
| 1988 | 28.3°C | 22.4°C | 16.4°C | 36.5°C | 8.9°C | 87 mm | 64% | 0.4 m/s | 4.6 |
| 1987 | 26.1°C | 20.4°C | 14.7°C | 34.0°C | 9.2°C | 93 mm | 67% | 0.5 m/s | 4.6 |
| 1986 | 24.7°C | 19.5°C | 14.2°C | 29.7°C | 7.1°C | 79 mm | 72% | 0.5 m/s | 5.1 |
| 1985 | 27.0°C | 20.9°C | 14.8°C | 32.9°C | 10.6°C | 53 mm | 63% | 0.5 m/s | 4.7 |
| 1984 | 27.1°C | 21.7°C | 16.4°C | 32.5°C | 10.1°C | 134 mm | 74% | 0.4 m/s | 5 |
| 1983 | 27.7°C | 21.9°C | 16.1°C | 32.5°C | 9.9°C | 120 mm | 70% | 0.4 m/s | — |
| 1982 | 25.1°C | 19.2°C | 13.2°C | 31.4°C | 5.5°C | 65 mm | 65% | 0.5 m/s | — |
| 1981 | 26.1°C | 20.6°C | 15.1°C | 30.3°C | 9.7°C | 92 mm | 71% | 0.4 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 27.1°C with lows near 15.8°C (mean 21.5°C), based on 45 years of NASA POWER data.
August averages 87 mm of rainfall in Rochester, a relatively wet time of year. The wettest on record was 143 mm in 2024.
The hottest August reached 36.5°C in 1988. The coldest dipped to 5.5°C in 1982.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 1.3°C. Daytime highs moved from 26.6°C to 27.7°C and overnight lows from 15.1°C to 16.6°C over the same span.
August is one of the warmer months of the year in Rochester and a relatively wet time of year, so plan for around 27.1°C daytime highs and 15.8°C at night.
Not quite — August is the 11th coolest month in Rochester, averaging 21.5°C.
For August in Rochester, pack light layers you can adjust through the day, with typical highs of 27.1°C and lows of 15.8°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 (1982).
The wettest August on record was 2024 with 143 mm. On average, August sees 87 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 Rochester 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.
