Boston, Massachusetts weather in July

Averages from 2021–2025 (155 days of record).

Average high: 84°F
Average low: 67°F
Rainy days: ~14 per month
Total precipitation: 5.3 in
Warmest recorded: 102°F
Coldest recorded: 56°F

Expect July days in Boston, Massachusetts to top out around 84°F and cool to about 67°F overnight, with roughly 14 days of measurable rain across the month. In recent years July has ranged from 56°F to 102°F.

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Current Boston, Massachusetts forecast → · Historical data by Open-Meteo (ERA5).