Boston · AutumnMonth summary
Boston weather in September
✅ Good
🌡️ Temperature min / max
59°F – 73°F
🌧 Rainy days
31% of days
☀️ Sunshine
10.8h per day on average
🌊 🌊 Season
Autumn
⭐ ⭐ Weather score
7.7/10
📅 📅 Best month
August (8.5/10)
Quick decision
Should you visit Boston in September?
✅ Good
✅ Yes if: you want shoulder-season value — fewer crowds, 23°F.
❌ No if: you need maximum sunshine — some overcast days are possible.
Our take: September is a good time to visit Boston. August remains slightly better (+0.8 pts).
By trip type
Boston in September by trip type
- 🏙️ 🏙️ City break / culture : ✅ Good
- 🚶 🚶 Outdoor activities : ✅ Good
- 🏖️ Beach / swimming : ⚠️ Possible
- 💰 💰 Budget : 💸 Peak season
Local context
What to expect in September
Autumn in Boston is often underrated: 23°F, golden light and declining crowds. An interesting window. Expect rain on 31% of days — a light raincoat in the bag is recommended. A good balance between weather and crowds, even if August (8.5/10) remains theoretically better.
Browse by month
All months for Boston
Annual table
Month-by-month comparison
| Month | Min °F | Max °F | Rain % | Precip in | Sun h/d | Score |
|---|---|---|---|---|---|---|
| 🌨️ January | 23°F | 37°F | 32% | 0.1in | 8.0h | 4.1/10 |
| 🌨️ February | 25°F | 39°F | 35% | 0.1in | 8.7h | 4.1/10 |
| 🌦️ March | 30°F | 46°F | 35% | 0.1in | 9.9h | 4.6/10 |
| 🌦️ April | 39°F | 55°F | 40% | 0.1in | 10.1h | 5.5/10 |
| 🌤️ May | 48°F | 66°F | 38% | 0.1in | 12.0h | 7.3/10 |
| 🌤️ June | 59°F | 77°F | 38% | 0.1in | 13.0h | 8.1/10 |
| 🌤️ July | 66°F | 84°F | 39% | 0.1in | 13.2h | 8.2/10 |
| 🌤️ August | 64°F | 82°F | 34% | 0.1in | 12.5h | 8.5/10 |
| 🌤️ September | 59°F | 73°F | 31% | 0.1in | 10.8h | 7.7/10 |
| ⛅ October | 48°F | 63°F | 32% | 0.2in | 9.7h | 7.0/10 |
| 🌫️ November | 36°F | 50°F | 30% | 0.1in | 8.7h | 5.0/10 |
| 🌫️ December | 27°F | 41°F | 34% | 0.1in | 7.6h | 4.0/10 |
Ideal
Fair
Challenging climate
◀ Current month · Source Open-Meteo · 10 years
📊 Data source
Data based on 10 years of ERA5 records via Open-Meteo, with ECMWF seasonal adjustment. In September, Boston averages 73°F, 31% rainy days and 10.8h of sunshine per day. Overall weather score: 7.7/10.
See methodology →
Comparison
September vs August (best month)
The best month is August (score 8.5/10). Difference:
- 🌡️ Max temperature : +5°F
- 🌧 Rainy days : +3%
- ☀️ Sunshine : +1.7h/day
FAQ
FAQ — Boston in September
Is September a good time to visit Boston?
September is an excellent time to visit Boston (score 7.7/10). With 73°F, 10.8h of sunshine and 31% rain, conditions are very favourable.
What to do in Boston in September?
With 73°F max and 10.8h of sunshine, focus on cultural sites, museums and local gastronomy.
Accommodation
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Activities & tours
Activities and tours in Boston
Guided tours, skip-the-line tickets and local experiences.
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