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August Weather in New Haven, United States

Last updated: June 24, 2025

In August, the average temperature in New Haven, United States is a pleasant 24°C (76°F). However, temperatures can vary significantly, with a minimum of 13°C (56°F) and a maximum soaring to 36°C (97°F). Expect 141 mm (5.5 in) of precipitation over approximately 12 days, accompanied by an average humidity level of 80%. Get ready for a warm and somewhat humid month!

August Temperature in New Haven

In August in New Haven, the average temperature is 24°C (76°F), with maximums reaching up to 36°C (97°F) and minimums dropping as low as 13°C (56°F). This diverse temperature range makes it a great time for travelers to enjoy both warm days and cooler evenings.

August Weather in New Haven: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in New Haven, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In New Haven, August typically has an average temperature of 24°C (76°F), with highs reaching up to 36°C (97°F) and lows dropping to around 13°C (56°F).
JanFebMarAprMayJunJulAugSepOctNovDec333647556676797672584539
Data source: Temperature data for New Haven 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 New Haven

In New Haven in August, the precipitation amount is 141 mm (5.5 in), occurring over the course of 12 days.

August Precipitation Trends in New Haven

The chart displays monthly precipitation patterns in New Haven, 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 New Haven, August typically receives around 141 mm (5.5 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec747912812816187102141521046751
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in New Haven

In New Haven in August humidity is 80%. With an average temperature of 24°C (76°F), this humidity feels like a warm, sticky embrace that can make exploring outdoors quite draining, so it's essential to stay hydrated and take breaks in the shade while traveling.

August Average Humidity in New Haven

This chart illustrates the average monthly humidity levels in New Haven, 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 New Haven is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%80%80%80%82%83%81%80%76%76%85%86%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in New Haven

In New Haven 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 New Haven.

Maximum UV Index Levels in New Haven for August

The chart shows the monthly maximum UV Index (UVI) for New Haven 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 New Haven typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3569101111109753
Data source: New Haven 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 New Haven Compares to Other Months

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

This table compares monthly weather conditions in New Haven, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (33°F)74 mm (2.9 inches)82%moderate
February Weather2°C (36°F)79 mm (3.1 inches)80%moderate
March Weather8°C (47°F)128 mm (5.1 inches)80%high
April Weather13°C (55°F)128 mm (5.0 inches)80%very high
May Weather19°C (66°F)161 mm (6.3 inches)82%very high
June Weather24°C (76°F)87 mm (3.4 inches)83%extreme
July Weather26°C (79°F)102 mm (4.0 inches)81%extreme
August Weather24°C (76°F)141 mm (5.5 inches)80%very high
September Weather22°C (72°F)52 mm (2.0 inches)76%very high
October Weather15°C (59°F)104 mm (4.1 inches)76%high
November Weather7°C (45°F)67 mm (2.6 inches)85%moderate
December Weather4°C (39°F)51 mm (2.0 inches)86%moderate

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