Typical September weather
Boston
Massachusetts · September
73° days
58° nights
about 6 rainy days · 12½ hours of daylight
What to pack
- Sunscreen
What September feels like
September is the local favorite, and the students know it too — move-in traffic snarls Comm Ave for the first week. After that it's the best stretch of the year for walking the Freedom Trail without queuing behind a tour group.
Expect about 6 days with real rain — enough to notice, not enough to plan around. Humidity stays comfortable; the air never feels heavy.
The numbers
| Typical high | 73° |
|---|---|
| Typical low | 58° |
| Days with real rain | 6 |
| Total rain | 3.6 in |
| Humidity | comfortable |
| Sunrise / sunset (mid-month) | 6:24 am / 6:54 pm |