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Boston Weather in September

United States

September transitions to comfortable warm weather in the 70s with lower humidity, creating ideal conditions for walking tours, outdoor festivals and enjoying Boston's neighborhoods before autumn's arrival.

Avg High

23°C

Avg Low

15°C

Daily Rain

5.9mm

Rainfall

Moderate

💡 Best months to visit Boston: Aug, Jun, Jul

Boston Weather by Month

Month	High	Low	Rain
Jan	3°C	-5°C	3.4mm
Feb	4°C	-6°C	3.2mm
Mar	9°C	-1°C	2.8mm
Apr	14°C	4°C	2.8mm
May	21°C	10°C	2.6mm
Jun	25°C	15°C	2.8mm
Jul	28°C	19°C	4.8mm
Aug	28°C	19°C	3.4mm
Sep	23°C	15°C	5.9mm
Oct	18°C	10°C	4.4mm
Nov	11°C	2°C	2.2mm
Dec	7°C	-1°C	3.7mm

About Boston

Boston's Freedom Trail, Ivy League heritage and seafood excellence reveal American Revolutionary history.

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