August · United States
Best time to visit Boston in August Weather, crowds & prices
Weather in Boston in August
Average temperature 22°C, 106 mm of rain, about 21 days with 6+ hours of sunshine and 75% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
August score
7.9/10
Ranked #3 of 12 months
- Avg temp
- 22°C
- Rainfall
- 106 mm
- Humidity
- 75%
- Days with 6h+ sun
- 21
- Crowd Density
- Peak Tourist Rush
- Average Expenses
- $$$ · Peak Season Rates ($$$)
August in Boston scores 7.9/10 for sightseeing and cultural travel - one of the top 12-month picks (#3). Expect around 22°C, 106 mm of rain, and roughly 21 days with 6+ hours of sunshine this month.
Freedom Trail bricks, harbor ferries, and campus greens feel finest May through September.
August in Boston: strong conditions, 3rd of 12
At 22°C (72°F) this is comfortable city weather in August, with sightseeing easiest before lunch and after the afternoon peak.
106 mm of rain makes this a wet month here, though with about 21 days with 6+ hours of sunshine there is still bright weather between the fronts.
That is 7.9/10 on the same scale — 3rd of 12 months, versus 8.2/10 for the best month here.
Pack light clothing, a hat and real sun protection, a proper rain shell rather than an umbrella.
Expect peak pricing, and this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Frequently asked
- What is the weather like in Boston in August?
- In August, Boston averages 22°C, 106 mm of rain, and about 21 days with 6+ hours of sunshine. Its climate-comfort score is 7.9/10.
- Is August a good time to visit Boston?
- August earns a 7.9/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Boston in August?
- Expect about 106 mm of rain in August. Average humidity is 75% and there are about 21 days with 6+ hours of sunshine.
Curated in Boston
Tickets & experiences
Things to do in Boston
Boston, United States. Live activities and tours from GetYourGuide, matched to this destination.