Weather in Boston in July 2025
- July is usually the hottest month of the year in Boston;
Average weather
Average temperature in Boston in July
The temperature in July is +29°C on average, with a range between a maximum of +33°C during the day and a minimum of +15°C at night.
The average maximum temperature goes up 6% by the end of the month, compared with the beginning of the month, from +27°C to +28°C.
Is Boston warm or cold in July?
Boston is typically warm in July.
Maximum temperatures go up compared to the previous month from +24°C to +27°C. The minimum temperature also goes up from +15°C to +19°C.
It’s generally warm, but pack a long-sleeve shirt for evenings.
July is the hottest month in Boston, here is the comparison with other months:
Water temperature in Boston in July
Water in Boston in July is Fresh. It varies from +16°C to +21°C, with an average of +19°C. The air temperature averaging +27°C is higher than the water temperature.
The water temperature in July is one of the warmest of the entire year:
Can you swim in Boston in July?
Climate in Boston in July
| June | July | August | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +24°C | +27°C | +26°C | ||||
| Min. temperature | ||||||
| +7°C | +10°C | +8°C | ||||
| Max. temperature | ||||||
| +36°C | +38°C | +36°C | ||||
| Rainfall | ||||||
| 113 mm | 114 mm | 111 mm | ||||
| Wind | ||||||
| 3 m/s | 3 m/s | 3 m/s | ||||
| Avg. water temperature | ||||||
| +14°C | +19°C | +20°C | ||||
| Humidity | ||||||
| 69% | 69% | 70% | ||||
| Air pressure | ||||||
| 1013 HPa | 1013 HPa | 1015 HPa | ||||
| Sunny days | ||||||
| 3 | 3 | 5 | ||||
| Cloudy days | ||||||
| 11 | 11 | 10 | ||||
| Rainy days | ||||||
| 14 | 14 | 14 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
July weather is still as good as in June. It’s getting warmer as July arrives. The average maximum temperature goes up from +24°C to +27°C during the day. Prepare for more rain. Average rainfall goes from 113 mm to 114 mm. Humidity levels don’t change as the month goes on, averaging around 69%. The average wind speed doesn’t change much during July, staying around 3 m/s. The amount of sunny days stay about the same, averaging 3 sunny days during the month.
August brings much the same weather, it remains good.
Wind
The average wind speed is 3 m/s getting up to 6 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Boston is gradually increasing during July, going from 2 m/s to 2 m/s over the course of the month.
Rain
How was the weather last July in Boston?
Climate Change over Years
The climate in Boston in July has not changed much over the last 43 years.
The average temperature was the lowest in 1992 (+14°C) and the highest in 2022 (+17°C). The driest year was 2016 with only 702 mm of rainfall, and the wettest year was 2021 with 2022 mm.
FAQ
Is July a good time to visit Boston?
Can you sunbathe in Boston in July?
Can you swim in Boston in July?
Is Boston rainy in July?
Is it sunny in Boston in July?
Other cities in USA
Monthly weather in Boston
Source of the data
For this page, we’ve looked at the typical weather in Boston, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.