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October Weather in New Haven, United States

Last updated: June 24, 2025

In New Haven, United States, the average temperature in October hovers around 15°C (59°F), with a minimum dip of -4°C (26°F) and a maximum soar of 33°C (92°F). Expect about 104 mm (4.1 in) of precipitation spread over 11 days, while average humidity lingers at a comfortable 76%. Embrace the variety this month brings!

October Temperature in New Haven

In October in New Haven, the average temperature is 15°C (59°F). Maximums can reach up to 33°C (92°F), while minimums can drop as low as -4°C (26°F). It's a great time to explore New Haven, but be sure to pack for both warm days and chilly nights.

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

The chart illustrates October 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, October typically has an average temperature of 15°C (59°F), with highs reaching up to 33°C (92°F) and lows dropping to around -4°C (26°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.

October Precipitation in New Haven

In New Haven in October, the precipitation amount is 104 mm (4.1 in) over the course of 11 days.

October Precipitation Trends in New Haven

The chart displays monthly precipitation patterns in New Haven, with values for each month alongside October’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October’s conditions compare to those of other months. In New Haven, October typically receives around 104 mm (4.1 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec747912812816187102141521046751
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in New Haven

In New Haven in October humidity is 76%. With an average temperature of 15°C (59°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities less enjoyable and often leading to a quick sense of fatigue while traveling.

October Average Humidity in New Haven

This chart illustrates the average monthly humidity levels in New Haven, with October’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In October, average humidity in New Haven is approximately 76%, 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 October generated using information from the Copernicus Climate Change Service.

October UV Index in New Haven

In New Haven in October, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in New Haven.

Maximum UV Index Levels in New Haven for October

The chart shows the monthly maximum UV Index (UVI) for New Haven in October, 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 October, the maximum UV index in New Haven typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3569101111109753
Data source: New Haven October 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 October 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 October’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 October’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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