Boston (MA)
May
Weather in Boston, Massachusetts for May 2027
Your guide to Boston weather in May - trends and predictions
In general, the average temperature in Boston at the beginning of May is 15 °C. As the month progressed, temperatures tended to significantly warm up, reaching an average of 20.2 °C by the end of May.
The climate of Boston in May is notably wet, with an average of 11 rainy days, and a total of 148.8 mm of precipitation.
Is May a good time to visit Boston? check out the best time to travel to Boston page.
✨ Is May a good time to visit Boston? – Ask the AI Weatherman
Temperatures
Rain 🌧️
More
20
Dry days
11
Rainy days
0
Snow days
18°/10°
Temperatures
18 km/h
Avg max wind
68 %
Avg humidity
Boston Weather May
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Temperatures trend during May in Boston
See the weather trend as well as the moving average line
May weather in Boston day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| May 1 |  Light rain | 15° /7° | 3 mm | 5 | |
| May 2 | Light rain | 16° /8° | 4.4 mm | 4 | |
| May 3 |  Patchy rain possible | 13° /8° | 1.1 mm | 3 | |
| May 4 |  Heavy rain at times | 13° /7° | 8.6 mm | 4 | |
| May 5 |  Moderate or heavy rain shower | 15° /8° | 8.9 mm | 4 | |
| May 6 |  Moderate rain | 17° /9° | 10.8 mm | 5 | |
| May 7 | Patchy rain possible | 17° /10° | 1.7 mm | 5 | |
| May 8 | Patchy rain possible | 15° /9° | 1.2 mm | 5 | |
| May 9 | Light rain | 14° /7° | 5.3 mm | 4 | |
| May 10 | Light rain | 16° /8° | 3.4 mm | 4 | |
| May 11 | Patchy rain possible | 16° /9° | 0.3 mm | 5 | |
| May 12 |  Cloudy | 18° /8° | 0.3 mm | 5 | |
| May 13 | Patchy rain possible | 18° /10° | 0.2 mm | 5 | |
| May 14 | Light rain | 20° /11° | 3.6 mm | 5 | |
| May 15 | Patchy rain possible | 19° /12° | 2 mm | 4 | |
| May 16 |  Partly cloudy | 22° /13° | 0.4 mm | 6 | |
| May 17 | Light rain | 20° /12° | 4.6 mm | 5 | |
| May 18 | Partly cloudy | 20° /10° | 0 mm | 6 | |
| May 19 | Patchy rain possible | 19° /11° | 0.4 mm | 5 | |
| May 20 | Light rain | 20° /12° | 6.6 mm | 5 | |
| May 21 | Light rain | 22° /12° | 8.9 mm | 6 | |
| May 22 |  Heavy rain | 21° /12° | 33.7 mm | 6 | |
| May 23 | Light rain | 20° /12° | 6.1 mm | 6 | |
| May 24 | Light rain | 18° /11° | 3.9 mm | 5 | |
| May 25 | Patchy rain possible | 19° /10° | 1.4 mm | 5 | |
| May 26 |  Overcast | 23° /12° | 0.1 mm | 6 | |
| May 27 | Light rain | 23° /13° | 2.5 mm | 6 | |
| May 28 | Light rain | 22° /14° | 3.9 mm | 6 | |
| May 29 | Light rain | 18° /11° | 6.5 mm | 5 | |
| May 30 | Moderate or heavy rain shower | 17° /10° | 6.5 mm | 5 | |
| May 31 | Moderate rain at times | 20° /9° | 8.5 mm | 6 | |
| Next | |||||
Important Notice
Our weather forecast for Boston in May is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Boston forecast closer to your planned date for the most up-to-date weather information.
Change Month
Boston in May - FAQ
What are the expected maximum and minimum temperatures in Boston during May?
Enjoy moderate daytime temperatures of up to 18° and cooler nights around 10°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Boston during May?
Significant rainfall exceeding 148.8 mm is expected in Boston during May, occurring over more than 11 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Boston during May?
The average wind speed in Boston during May is 18 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in Boston
Explore the daily rainfall trends and prepare for Bostons May weather 💧
Typically, Boston has 11 rainy days in May with a total of 148.8 mm of rainfall.
UV exposure in Boston during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
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