Boston in Summer — Weather & What to Expect
Summer in Boston (June, July, August) averages daytime highs of 27.2°C and lows of 17.7°C, with around 296.6mm of rain across the season (35 rainy days in total). It includes some of the best months of the year to visit (June, July, August).
In the northern hemisphere, summer in Boston covers June, July, August.
Summer in Boston month by month
| Month | High | Low | Rain | Rainy days | Rating |
|---|---|---|---|---|---|
| June | 25.4°C | 15.2°C | 74.6mm | 11 | 10/10 |
| July | 28.4°C | 19.1°C | 126.0mm | 12 | 9/10 |
| August | 27.9°C | 18.7°C | 96.0mm | 12 | 10/10 |
What to pack for Boston in summer
- Light layers
- Sunscreen
- T-shirts and light trousers or shorts
- Light waterproof layer
- Compact travel umbrella
- Waterproof jacket
- Quick-dry clothing
Frequently Asked Questions
Is summer a good time to visit Boston?
Summer in Boston rates around 10/10 — excellent time to visit. Average highs are 27.2°C with 296.6mm of rain across the season.
How hot is Boston in summer?
Daytime highs average 27.2°C (81.0°F) across June, July, August, with nights around 17.7°C.
What months are summer in Boston?
Boston is in the northern hemisphere, so summer covers June, July, August.
See also: best time to visit Boston · Boston annual climate · Boston in spring · Boston in autumn · Boston in winter
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Once you know what summer in Boston looks like, find out exactly what to pack for Boston at 247PackingList. For currency, language and country facts, see the United States guide at 247CountryInfo.
Summer in Boston — what to pack
Thermal travel layers
Pack proper layers — winters are genuinely cold and evenings drop fast year-round.
Check Price →Check clothing sizes in United States at 247Sizing before you shop.
More summer travel essentials
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Climate data sourced from Open-Meteo (open source, open data licence). Monthly averages calculated from 2020–2023 historical data. Weather can be unpredictable — always check a live forecast before travelling.