Boston Weather in July
During July, Boston experiences high daytime temperatures of 29°C (84°F) and cooler nights around 19°C (66°F). Expect quite a bit of rainfall. Around 100 mm (3.9 in) is typical.
Rainfall in Boston in July
Past climate data indicates that roughly 12 days will see rain, totalling around 100 mm (3.9 in) for the month. Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.
Temperature in Boston in July
July in Boston brings typical temperatures with highs around 29°C (84°F) and lows of 19°C (66°F). This kind of day-to-night contrast is typical for this time of year. Nights drop to around 19°C (66°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable. This is typically the warmest month of the year, so light summer clothing is a good idea.
Sunshine in Boston in July
The days are predominantly sunny, with an estimated total of around 300 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.
Wind Speed in Boston in July
Average wind conditions reach 5 m/s (10 knots) in July. This creates lively weather with fresh winds that make small trees sway noticeably. Remember this is an average: some days are less windy while others have particularly active windy conditions.
Average water temperature in July
The water temperature is 18°C (64°F). It's not warm, but most people find it perfectly fine for a swim once they're in.For Boston itself, August and September generally stand out with the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Boston's climate page.
Boston Temperature in July
Min Temperature
19°C (66°F)
Max Temperature
29°C (84°F)
Water Temperature
18°C (64°F)
Chance of Rain
39%
Precipitation
100 mm (3.9 in)
Rainy days
12 days
Humidity
71%
Windspeed
5 m/s (10 knots)
Sunshine
300 hours
Percentage Sunshine
65%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Boston typically stay consistent throughout July, with daily highs averaging around 29°C (84°F). Nights are pleasant, with lows typically ranging from 18°C (64°F) to 20°C (68°F).
Average temperatures in July
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in July
Historical weather for Boston in July
Browse day-by-day weather records for Boston spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Boston historical weather extremes in July
Our historical data for Boston spans 1976 to 2025, revealing these weather extremes.
- The warmest day in July was on July 22, 2011, with a maximum of 39°C (102°F).
- On July 3, 2021, Boston saw its coldest July day with temperatures maxing out at 16°C (61°F).
- Boston registered its coldest July night on July 1, 1988, with temperatures dropping to 10°C (50°F).
Best Places in the United States of America in July
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in July →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Boston in July
Warm but pleasant conditions in Boston in July. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Expect heavy rainfall, so bring good rain protection and waterproof bags. Expect water temperatures of around 18°C (64°F), which is definitely too cold for comfortable swimming. Your luggage space is better used for other items. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in Boston in July
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Boston's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Boston climate overview or explore weather in the United States of America.
