Month-by-month travel weather
Boston August weather
Boston, United States · August
Hot days and easier nights can mix
August often stays warm and humid, but later in the month some evenings can feel a bit easier.
Rain and storms can briefly shift the air, though humidity can return quickly.
August averages at a glance
Average low
around 18–20°C
Average high
around 25–28°C
Average precipitation
around 80–115 mm
Rainy days
about 8–11 days
What to wear in August in Boston
Actual feel will change with wind and rain, but use the suggestions below to build a comfortable layered outfit.
- • Breathable clothing + optional rain option.
- • Optional thin indoor layer for A/C.
- • A light layer can help on breezier nights.
Travel tips for visiting Boston in August
- • Walk more in morning/evening windows on hotter days.
- • Rain can slow transit—keep buffer time.
August weather in Boston — FAQ
Q. Is August cooler than July?
A. Sometimes slightly, but warm days can still be common.
Q. Are nights cool?
A. Some nights feel easier, but humid warm nights also happen.
Explore Boston
These pages are connected so you can compare conditions and decide for yourself.