The highest day temperature in September 2025 was 83°F. The lowest night temperature was 43°F. The average values for day and night temperatures during September were 75.5°F и 60.4°F respectivly.

The average sea surface temperature in September 2025 for New Bedford was 71.6°F. The maximum and minimum values were 69.2°F and 73.4°F respectively.

You can expect various weather conditions during September. Be ready for sunny, cloudy or even gloomy days.

Precipitation total in September for New Bedford is 0.9 in. This value is relatively stable throughout the year.

The average wind speed in September is 8.0 mph. It makes September one of the most windless months of the year for New Bedford.

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 Bedford in September is 7.1 hours.