The highest day temperature in October 2025 was 82°F. The lowest night temperature was 34°F. The average values for day and night temperatures during October were 64.1°F и 50.2°F respectivly.

The average sea surface temperature in October 2025 for New Haven was 66.0°F. The maximum and minimum values were 59.4°F and 72.6°F respectively.

Most of the days in October are sunny but you can also expect cloudy and gloomy days.

Precipitation total in October for New Haven is 1.4 in. It makes october one of the most rainy months of the year.

The average wind speed in October is 9.1 mph.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for New Haven in October is 6.8 hours.