The highest day temperature in September 2026 was 91°F. The lowest night temperature was 41°F. The average values for day and night temperatures during September were 71.0°F и 54.3°F respectivly.

The average sea surface temperature in September 2026 for Brunswick was 62.1°F. The maximum and minimum values were 58.4°F and 65.6°F respectively.

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

Precipitation total in September for Brunswick is 0.9 in. It makes september one of the least rainy months of the year.

The average wind speed in September is 6.4 mph. It makes September one of the most windless months of the year for Brunswick.

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 Brunswick in September is 6.8 hours.