May · United States
Best time to visit Boston in May Weather, crowds & prices
Weather in Boston in May
Average temperature 14°C, 81 mm of rain, about 28 days with 6+ hours of sunshine and 77% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
May score
8.2/10
Ranked #1 of 12 months
- Avg temp
- 14°C
- Rainfall
- 81 mm
- Humidity
- 77%
- Days with 6h+ sun
- 28
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$$ · Peak Season Rates ($$$)
May in Boston scores 8.2/10 for sightseeing and cultural travel - the single best month of the year. Expect around 14°C, 81 mm of rain, and roughly 28 days with 6+ hours of sunshine this month.
Freedom Trail bricks, harbor ferries, and campus greens feel finest May through September.
May: the best month of the year in Boston
Temperatures hover around 14°C (58°F) — the kind of month where neither heat nor cold forces the schedule.
Budget for roughly 81 mm of rain this month — a flexible day or two helps — with about 28 days with 6+ hours of sunshine and 14.4 hours of daylight to work around it.
On our climate-comfort scale this is the top-ranked month of the year for Boston at 8.2/10 — the reference point every other month on this page is measured against.
Pack layers you can shed by midday plus one warm layer for the evening, a packable rain layer.
Expect peak pricing, and crowds are moderate. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Frequently asked
- What is the weather like in Boston in May?
- In May, Boston averages 14°C, 81 mm of rain, and about 28 days with 6+ hours of sunshine. Its climate-comfort score is 8.2/10.
- Is May a good time to visit Boston?
- May earns a 8.2/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Boston in May?
- Expect about 81 mm of rain in May. Average humidity is 77% and there are about 28 days with 6+ hours of sunshine.
Curated in Boston
Tickets & experiences
Things to do in Boston
Boston, United States. Live activities and tours from GetYourGuide, matched to this destination.