Measurements:
°C
°F
Boston
40°F
SE 11 mph
Feels like: 32°F
Precip: 100%
World Resorts USA Boston Weather September Weather in Boston

Boston Weather: September

Average Day Temperature: 74.8°F
Average Night Temperature: 63.0°F
Sea Water Temperature: 65.9°F
Number of Sunny Days: 14 days
Sunshine Hours: 11.8 - 13.2 hours
Number of Rainy Days: 3 days
Precipitation Totals: 1.8 in

Air Temperature in September, °F

Select Year: 2023 2022 2021

The highest day temperature in September 2023 was 99°F. The lowest night temperature was 48°F. The average values for day and night temperatures during September were 75.2°F и 63.4°F respectivly.

Boston Water Sea Temperature in September, °F

Select Year: 2023 2022 2021

The average sea surface temperature in September 2023 for Boston was 67.4°F. The maximum and minimum values were 62.4°F and 72.2°F respectively.

Sunny, Cloudy and Gloomy days

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

Precipitation Totals in September, in

Precipitation total in September for Boston is 1.8 in. It makes september the least rainy month of the year.

Wind Speed in September, mph

The average wind speed in September is 8.2 mph. It makes September one of the most windless months of the year for Boston.

Average Sunny Hours Per Day

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 Boston in September is 7.6 hours.

Best Time to Visit Boston
The most sunny months:
August 16 days
July 15 days
September 14 days
The most warm months:
July 85.4 °F
August 84.1 °F
June 76.6 °F
Warmest sea temperature:
August 69.6 °F
July 68.7 °F
September 65.9 °F
The most cold months:
January 31.6 °F
February 33.2 °F
December 38.4 °F
The most rainy months:
April 5 days
June 5 days
December 4 days
The most windy months:
January 11 mph
March 11 mph
February 10 mph

Boston on the Weather Map

USA Resorts:
NAME
Boston +40
Chicago +36
Hawaii +74
Honolulu +74
Houston +62
Las Vegas +58
Los Angeles +54
Miami +72
New York +40
Orlando +60
San Diego +56
San Francisco +50
Sarasota +64
Tampa +60
Washington +38
24 Hours Weather Forecast
Boston
Local time: 04:38
29 mar, friday
0600 40°F
SE
11 mph
0900 40°F
SE
9 mph
1200 44°F
SE
12 mph
1500 50°F
SE
15 mph
1800 46°F
SE
15 mph
2100 42°F
SE
15 mph
30 mar, saturday
0000 40°F
SE
14 mph
0300 38°F
E
14 mph