Boston Weather in July
United States · Humid Continental climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
July in Boston sees average temperatures ranging from a low of 19.4°C (66.9°F) to a high of 28.7°C (83.7°F), with a mean of 23.8°C (74.8°F). Compared to the annual average of 11.2°C (52.2°F), this month is 12.6°C warmer than the yearly norm. This is the hottest month of the year, reaching 28.7°C (83.7°F) on average. Precipitation averages 118.5mm, making it approximately 17.0mm wetter than the monthly average of 102.0mm. The city receives an average of 11.2 hours of sunshine per day during July, with relative humidity averaging 73.0%. Wind speeds reach an average maximum of 18.9 km/h. For travelers, this month offers a hottest month of the year experience in Boston, with wetter-than-average conditions compared to the rest of the year.
Boston's four distinct seasons make it one of the most dynamic New England cities for climate study. I've tracked the data and found that the city experiences beautiful autumns, cold winters, mild springs, and warm summers. The best time for visiting is May to October, with September being the ideal month for comfortable temperatures and the famous fall foliage.
July vs Adjacent Months
| Metric | June | July | August |
|---|---|---|---|
| Mean Temp | 20.4°C (68.7°F) | 23.8°C (74.8°F) | 22.7°C (72.9°F) |
| Rainfall | 75.6mm | 118.5mm | 92.2mm |
| Sunshine | 11.4 hrs | 11.2 hrs | 10.7 hrs |
| Humidity | 69.8% | 73.0% | 73.6% |
| Wind | 19.8 km/h | 18.9 km/h | 18.4 km/h |
| Rainy Days | 16.8 | 18.2 | 17.0 |
Seasonal Context
July falls in Summer in the Northern Hemisphere. Summer brings the warmest conditions of the year with the longest daylight hours. For travelers visiting Boston in July, the data indicates mixed conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in Boston in July?
The average temperature in Boston during July ranges from 19.4°C (66.9°F) to 28.7°C (83.7°F), with a mean of 23.8°C (74.8°F).
How much does it rain in Boston in July?
Boston receives an average of 118.5mm of precipitation in July, spread across approximately 18.2 rainy days.
What should I pack for Boston in July?
Based on July weather data, pack layers including light jackets and t-shirts, plus an umbrella. Rain gear is essential — this month averages 118.5mm of precipitation.
Is July a good time to visit Boston?
July is a month with challenging conditions. Plan activities carefully and stay hydrated.
Other Months for Boston
Cities with Similar July Climate (Humid Continental)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: 42.36°, -71.06°. Timezone: America/New_York. Last updated: 2026-07-30.