Boston weather in May
Monthly temperatures, rain, humidity, what to wear and what to pack — 2024–2025 historical average
Boston May weather at a glance
In May, Boston averages 14.8°C, with typical highs of 19.3°C and lows of 10.6°C. The historical average is 13 wet days and 77% humidity.
Boston May temperature & humidity
Boston May rain & wet days
Pack a compact umbrella. Keep an indoor stop available between outdoor activities.
What to wear in Boston in May
T-shirts or long sleeves with one light outer layer should be comfortable. Showers are possible, so a compact umbrella is useful.
- DaytimeLong sleeves and a light jacket · average high 19.3°C
- Morning & eveningLong sleeves with a jacket or cardigan · average low 10.6°C
- FootwearComfortable walking shoes; quick-dry footwear for rainy days.
Packing essentials
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Boston May sunrise & sunset times
2026 May · Local time (America/New_York)
| Date | Sunrise | Sunset | Daylight |
|---|---|---|---|
| 2026-05-01 | 05:39 | 19:44 | 14h 5m |
| 2026-05-15 | 05:23 | 19:59 | 14h 36m |
| 2026-05-31 | 05:10 | 20:14 | 15h 3m |
For sunset photos, arrive before the listed sunset time. Clouds, mountains and buildings can change when the sun becomes visible or disappears.
Calculated for the city coordinates with daylight saving applied. SunCalc · tz-lookup
Boston travel updates
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Today’s weather and forecast
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Forecast · Windy. Monthly averages are in the Temperature section.
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Boston travel essentials
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Best months to visit Boston
Bar height shows our simple weather-comfort score, not a safety rating; colour shows temperature.
May weather by year
Daily weather in 2025
Daily high and low temperatures; blue labels show precipitation
Frequently asked questions
What is Boston weather like in May?
In May, Boston averages 14.8°C, with typical highs of 19.3°C and lows of 10.6°C. The historical average is 13 wet days and 77% humidity. Our weather-comfort rating for this month is fair.
Does it rain a lot in Boston in May?
There are about 13 wet days in May. A compact umbrella is still useful.
What should I wear in Boston in May?
T-shirts or long sleeves with one light outer layer should be comfortable. Showers are possible, so a compact umbrella is useful.
What are the best months to visit Boston?
Recent weather data rates June, August, September, October among the more comfortable months.
Where can I check Boston weather in May in real time?
Check local webcams for the view right now and a local weather service for today’s forecast. Monthly temperatures here are historical averages.
What time are sunrise and sunset in Boston in May?
On 2026-05-15, calculated sunrise is 05:23 and sunset is 19:59 in local time (America/New_York). Times vary by date and terrain.
Boston weather by month
More Americas destinations in May
Open-Meteo (CC BY 4.0) · 2024–2025 historical data, aggregated and rounded by this site. Not a forecast or long-term climate normal. Calculation method and limitations