Average temperatures, rainfall and packing tips for Boston, United States in September
🌡️ Avg high
23°C
🌙 Avg low
14°C
🌧️ Rainfall
~58 mm
📊 Warmth rank
#4 of 12
September in Boston at a glance
September in Boston is typically warm, with average daytime highs around 23°C and nights near 14°C. Temperature-wise it sits mid-range for Boston (the 4th warmest month).
Expect some rain: around 58 mm falls in Boston during September on average.
What to pack for Boston in September
T-shirts and light layers
A light jacket or sweater for the evenings
A compact umbrella for occasional showers
Boston - year at a glance
HighLow · September highlighted
Is September a good time to visit Boston?
🧳 September is one of the most comfortable months to visit Boston - daytime temperatures sit in a pleasant range and it's a good pick for sightseeing and time outdoors.
In September, Boston averages a daytime high of about 23°C and a night-time low of around 14°C, based on recent historical data.
Does it rain in Boston in September?
Expect some rain: around 58 mm falls in Boston during September on average.
Is September a good time to visit Boston?
September is one of the most comfortable months to visit Boston - daytime temperatures sit in a pleasant range and it's a good pick for sightseeing and time outdoors.