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August Weather in Rochester, United States

Last updated: June 24, 2025

In August, the average temperature in Rochester, United States is a pleasant 21°C (70°F). However, be prepared for fluctuations, as it can dip to a minimum of 9°C (49°F) and rise to a sizzling 34°C (94°F). Rainfall is expected, with 118 mm (4.6 in) spread over about 11 days, contributing to an average humidity level of 77%.

August Temperature in Rochester

In August in Rochester, the average temperature is 21°C (70°F), with maximums reaching 34°C (94°F) and minimums dipping as low as 9°C (49°F). This pleasant climate makes it an ideal time for travelers to explore the area and enjoy outdoor activities.

August Weather in Rochester: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Rochester, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rochester, August typically has an average temperature of 21°C (70°F), with highs reaching up to 34°C (94°F) and lows dropping to around 9°C (49°F).
JanFebMarAprMayJunJulAugSepOctNovDec171834435870737064483425
Data source: Temperature data for Rochester generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

August Precipitation in Rochester

In Rochester in August, the precipitation amount is 118 mm (4.6 in) over the course of 11 days.

August Precipitation Trends in Rochester

The chart displays monthly precipitation patterns in Rochester, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Rochester, August typically receives around 118 mm (4.6 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec36475988143135991181221104742
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Rochester

In Rochester in August, humidity is 77%. With an average temperature of 21°C (70°F), this humidity feels like a warm, slightly sticky embrace, making travel invigorating yet slightly uncomfortable as you navigate the vibrant streets and outdoor attractions.

August Average Humidity in Rochester

This chart illustrates the average monthly humidity levels in Rochester, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Rochester is approximately 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%84%80%81%74%81%80%77%75%80%87%83%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Rochester

In Rochester in August, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Rochester.

Maximum UV Index Levels in Rochester for August

The chart shows the monthly maximum UV Index (UVI) for Rochester in August, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In August, the maximum UV index in Rochester typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35589101098532
Data source: Rochester August UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How August Weather in Rochester Compares to Other Months

Weather in Rochester varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Rochester, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Rochester, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-8°C (17°F)36 mm (1.4 inches)82%moderate
February Weather-8°C (18°F)47 mm (1.8 inches)84%moderate
March Weather1°C (34°F)59 mm (2.3 inches)80%moderate
April Weather6°C (44°F)88 mm (3.4 inches)81%very high
May Weather15°C (59°F)143 mm (5.6 inches)74%very high
June Weather21°C (71°F)135 mm (5.3 inches)80%very high
July Weather23°C (74°F)99 mm (3.9 inches)80%very high
August Weather21°C (70°F)118 mm (4.6 inches)77%very high
September Weather18°C (64°F)122 mm (4.8 inches)75%very high
October Weather9°C (48°F)110 mm (4.3 inches)80%moderate
November Weather1°C (34°F)47 mm (1.8 inches)87%moderate
December Weather-4°C (25°F)42 mm (1.6 inches)83%low

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