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August Weather in Manhattan, United States

Last updated: June 24, 2025

In Manhattan, United States, the average temperature in August is a pleasant 19°C (66°F). However, temperatures can vary significantly, with minimums dipping to 3°C (38°F) and maximums soaring to 34°C (94°F). Visitors can expect about 34 mm (1.3 in) of precipitation over 5 days, contributing to an average humidity of 69%.

August Temperature in Manhattan

In August in Manhattan, the average temperature is 19°C (66°F), with maximums reaching 34°C (94°F) and minimums dropping as low as 3°C (38°F). This diverse temperature range makes Manhattan an ideal destination for travelers seeking both warm days and cooler evenings.

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

The chart illustrates August temperature patterns in Manhattan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Manhattan, August typically has an average temperature of 19°C (66°F), with highs reaching up to 34°C (94°F) and lows dropping to around 3°C (38°F).
JanFebMarAprMayJunJulAugSepOctNovDec211931384959686656403023
Data source: Temperature data for Manhattan 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 Manhattan

In Manhattan in August, the precipitation amount is 34 mm (1.3 in) over the course of 5 days.

August Precipitation Trends in Manhattan

The chart displays monthly precipitation patterns in Manhattan, 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 Manhattan, August typically receives around 34 mm (1.3 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec245036708286263447523730
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Manhattan

In Manhattan in August humidity is 69%. With an average temperature of 19°C (66°F), this humidity feels like a warm embrace, making travel slightly uncomfortable as the air hangs heavy and the heat clings to your skin, urging you to seek shade or refreshment often.

August Average Humidity in Manhattan

This chart illustrates the average monthly humidity levels in Manhattan, 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 Manhattan is approximately 69%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%92%90%83%79%76%74%69%67%72%89%94%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Manhattan

In Manhattan in August, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Manhattan.

Maximum UV Index Levels in Manhattan for August

The chart shows the monthly maximum UV Index (UVI) for Manhattan 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 Manhattan typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3578111110108642
Data source: Manhattan 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 Manhattan Compares to Other Months

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

This table compares monthly weather conditions in Manhattan, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (22°F)24 mm (0.9 inches)93%moderate
February Weather-7°C (19°F)50 mm (2.0 inches)92%moderate
March Weather0°C (31°F)36 mm (1.4 inches)89%high
April Weather3°C (38°F)70 mm (2.8 inches)83%very high
May Weather9°C (49°F)82 mm (3.2 inches)79%extreme
June Weather15°C (60°F)86 mm (3.4 inches)76%extreme
July Weather20°C (68°F)26 mm (1.0 inches)74%very high
August Weather19°C (66°F)34 mm (1.3 inches)69%very high
September Weather14°C (57°F)47 mm (1.8 inches)67%very high
October Weather4°C (40°F)52 mm (2.0 inches)72%high
November Weather-1°C (31°F)37 mm (1.5 inches)89%moderate
December Weather-5°C (23°F)30 mm (1.2 inches)94%low

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