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October Weather in New Haven, United States

Last updated: June 24, 2025

In October, the average temperature in New Haven, United States hovers around 16°C (61°F). However, be prepared for a wide range, with minimums dipping to -1°C (31°F) and maximums soaring to 36°C (97°F). This month sees an average precipitation of 108 mm (4.2 in) over 11 days, accompanied by a relatively high average humidity of 78%.

October Temperature in New Haven

In October in New Haven, the average temperature is 16°C (61°F), with maximums reaching up to 36°C (97°F) and minimums dropping as low as -1°C (31°F). Pack accordingly to enjoy a comfortable stay, as the weather can vary significantly during this time.

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 16°C (61°F), with highs reaching up to 36°C (97°F) and lows dropping to around -1°C (31°F).
JanFebMarAprMayJunJulAugSepOctNovDec374149576875787672614642
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 108 mm (4.2 in), distributed over 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 108 mm (4.2 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec9615013514411915711510412510889121
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 78%. With an average temperature of 16°C (61°F), this humidity feels like a warm, sticky embrace, making travel somewhat uncomfortable as it clings to your skin and creates a heavy atmosphere that can drain your energy.

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 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%86%86%82%83%83%80%74%71%78%88%88%
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.
JanFebMarAprMayJunJulAugSepOctNovDec3579101111109753
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 Weather3°C (37°F)96 mm (3.8 inches)87%moderate
February Weather5°C (41°F)150 mm (5.9 inches)86%moderate
March Weather9°C (49°F)135 mm (5.3 inches)86%high
April Weather14°C (57°F)144 mm (5.7 inches)82%very high
May Weather20°C (68°F)119 mm (4.7 inches)82%very high
June Weather24°C (75°F)157 mm (6.2 inches)83%extreme
July Weather26°C (79°F)115 mm (4.5 inches)80%extreme
August Weather25°C (77°F)104 mm (4.1 inches)74%very high
September Weather22°C (72°F)125 mm (4.9 inches)71%very high
October Weather16°C (61°F)108 mm (4.2 inches)78%high
November Weather8°C (46°F)89 mm (3.5 inches)88%moderate
December Weather6°C (42°F)121 mm (4.8 inches)88%moderate

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