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80° 74° 68° 62° 56° Sep. *1 *2 *3 *4 *5 *6 *7 *8 *9 *10 *11 *12 *13 *14 *15 *16 *17 *18 *19 *20 *21 *22 *23 *24 *25 *26 *27 *28 *29 *30. Avg. Hi.
Low temperature: 58°F (14°C) Hours daylight/sun: 8 hours. Water temperature: 0°F (-18°C) In September temperature highs in Boston reach a pleasant 73°F (23°C) - ideal for enjoying some great sightseeing. The sun still shines for 8 hours each day and it’s one of the least rainy months with only 6 rainy days on average.
September Weather in Boston Massachusetts, United States. Daily high temperatures decrease by 9°F, from 76°F to 67°F, rarely falling below 58°F or exceeding 86°F. Daily low temperatures decrease by 9°F, from 62°F to 53°F, rarely falling below 44°F or exceeding 69°F.
In Boston, September is characterized by high temperatures and moderate rainfall. Daytime temperatures hover around 24°C , while nights can cool down to about 15°C . Boston in September usually receives moderate rainfall, averaging around 79 mm for the month. It's the month with the least rainfall.
The average temperature in Boston in September for a typical day ranges from a high of 75°F (24°C) to a low of 58°F (14°C). Some would describe it as mildly cool with a gentle breeze. For comparison, the hottest month in Boston, July, has days with highs of 82°F (28°C) and lows of 65°F (18°C).
Usually every day in September warms to over 60 degrees Fahrenheit (16 degrees Celsius) in Boston. The city averages 1 day this month when the thermometer reaches into the 90s °F (over 32 °C). Temperatures above 100 °F (38 °C) are not expected here during September.
Nov 20, 2020 · Hottest month: July (average 82 degrees F high/66 degrees F low) Coldest month: January (average 37 degrees F high/23 degrees F low) Wettest month: December (average 2.04 inches precipitation) Snowiest month: January (average 12.9 inches snow) Best month for swimming: August (average sea temperature 69.2 degrees F high)
