Places › Boston, MA › September
Boston in September
One of the best months — score 93 of 100
Typical September days in Boston reach about 73°F with nights near 58°F.
Avg high
73°F
1991–2020 normal
Avg low
58°F
1991–2020 normal
Rain total
3.56 in
in a typical September
Rain days
9
days with at least 0.01 in
Daylight
12h 26m
at mid-September, computed
What to pack for Boston in September
- A light jacket or fleece for evenings.
- A compact rain layer — about 9 days see rain in a typical September.
Every packing line is triggered by a number on this page — the rules are on How we pick.
September vs. the alternatives
The whole year in Boston
JAN
37°F
Rain 12 days
Daylight 9h 24mFEB
39°F
Rain 11 days
Daylight 10h 29mMAR
46°F
Rain 12 days
Daylight 11h 48mAPR
56°F
Rain 12 days
Daylight 13h 18mMAY
66°F
★ Best
Rain 12 days
Daylight 14h 34mJUN
76°F
★ Best
Rain 11 days
Daylight 15h 16mJUL
82°F
Rain 9 days
Daylight 14h 59mAUG
80°F
Rain 9 days
Daylight 13h 54mSEP
73°F
★ Best
Rain 9 days
Daylight 12h 26mOCT
62°F
Rain 10 days
Daylight 10h 59mNOV
52°F
Rain 10 days
Daylight 9h 43mDEC
42°F
Rain 12 days
Daylight 9h 06m
37°F
Rain 12 days
Daylight 9h 24mFEB
39°F
Rain 11 days
Daylight 10h 29mMAR
46°F
Rain 12 days
Daylight 11h 48mAPR
56°F
Rain 12 days
Daylight 13h 18mMAY
66°F
★ Best
Rain 12 days
Daylight 14h 34mJUN
76°F
★ Best
Rain 11 days
Daylight 15h 16mJUL
82°F
Rain 9 days
Daylight 14h 59mAUG
80°F
Rain 9 days
Daylight 13h 54mSEP
73°F
★ Best
Rain 9 days
Daylight 12h 26mOCT
62°F
Rain 10 days
Daylight 10h 59mNOV
52°F
Rain 10 days
Daylight 9h 43mDEC
42°F
Rain 12 days
Daylight 9h 06m
Averages are the 1991–2020 climate normals (NOAA National Centers for Environmental Information) for the station named on each page. Rain days = days with at least 0.01 in of precipitation. Daylight is computed for the middle of the month.