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Boston in July: weather, sea & travel advice
This month's data profile
Rain shapes the decision
Boston in July is climatically well suited to city breaks and beach holidays. The average daily high is around 28 °C, and the sea is about 18 °C. With about 13 rainy days it is wet.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
67/100 · #3
Warmth
#1
Dryness
#12
Sun
#1
Sea warmth
#2
Published best categories: Overall, Beach, Family
Boston · JulyPhoto: Chris Wood ( User:chris_j_wood ) · CC BY-SA 4.0Climate facts
- Average high
- 28 °C
- Average low
- 17 °C
- Sea
- 18 °C
- Rainy days (est.)
- 13 rainy days (est.)
- Sun (est.)
- 7 h/day
- Humidity
- 75 %
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Sea °C | Score |
|---|---|---|---|---|---|---|---|---|---|
| June | 24 | 14 | 13 | 100 | 7.2 | 78 | 0.4 | 15 | 65 |
| July (selected) | 28 | 17 | 13 | 98 | 7.3 | 75 | 0.3 | 18 | 67 |
| August | 27 | 17 | 12 | 92 | 6.6 | 73 | 0.4 | 19 | 70 |
How do the previous and next months compare?
Baseline: July (67/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | Sea Δ | |
|---|---|---|---|---|---|---|---|---|---|
| June | -2 | -3.8 °C | -3.6 °C | -0.2 | +1.9 mm | -0.1 h | +3.8 % | +0.1 m/s | -3.4 °C |
| August | +3 | -0.2 °C | -0.6 °C | -1.3 | -6 mm | -0.7 h | -1.7 % | +0.1 m/s | +0.6 °C |
All twelve months in context
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Useful next decisions
Frequently asked questions
How warm is Boston in July?
The average daily high is around 28 °C, with an average daily low of about 17 °C.
Can you swim in Boston in July?
The sea is about 18 °C (refreshing).
Does it rain a lot in Boston in July?
The curated estimate is about 13 rainy days per month, not a directly measured long-term average. Total precipitation averages around 98 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Boston?
By the climate score, June, July, August and September are the strongest months for Boston. For a beach trip: July, August and September. July is one of them.