Boston
May
Weather in Boston for May 2025
Your guide to Boston weather in May - trends and predictions
In general, the average temperature in Boston at the beginning of May is 15 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 21.4 °F by the end of May.
With an average of 4 rainy days, Boston experiences minimal rainfall in May, ensuring that most days remain pleasantly dry.
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27
Dry days
4
Rainy days
0
Snow days
21°/8°
Temperatures
17 km/h
Avg max wind
64 %
Avg humidity
Boston in May average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  14° | 2 16° | 3  12° | 4 10° | |||
| 5 12° | 6  20° | 7  21° | 8  19° | 9 16° | 10  17° | 11 17° |
| 12 18° | 13 20° | 14 21° | 15 22° | 16 21° | 17 17° | 18 17° |
| 19 16° | 20 18° | 21 25° | 22 23° | 23 23° | 24 25° | 25 19° |
| 26 21° | 27 21° | 28 28° | 29 20° | 30 18° | 31 23° |
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Temperatures trend during May in Boston
See the weather trend as well as the moving average line
May weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| May 1 | Moderate or heavy rain shower | 14° /7° | 7.5 mm | 4 | |
| May 2 | Moderate or heavy rain shower | 16° /8° | 4.4 mm | 4 | |
| May 3 | Patchy rain possible | 12° /7° | 0.4 mm | 3 | |
| May 4 | Moderate or heavy rain shower | 10° /6° | 5.9 mm | 3 | |
| May 5 | Patchy rain possible | 12° /6° | 5 mm | 3 | |
| May 6 | Partly cloudy | 20° /8° | 2.8 mm | 6 | |
| May 7 | Overcast | 21° /10° | 0.1 mm | 5 | |
| May 8 | Cloudy | 19° /11° | 3.5 mm | 4 | |
| May 9 | Partly cloudy | 16° /8° | 2.9 mm | 5 | |
| May 10 | Sunny | 17° /7° | 0 mm | 5 | |
| May 11 | Patchy rain possible | 17° /9° | 0.5 mm | 4 | |
| May 12 | Patchy rain possible | 18° /9° | 0.3 mm | 4 | |
| May 13 | Cloudy | 20° /11° | 0.3 mm | 5 | |
| May 14 | Sunny | 21° /10° | 0.7 mm | 5 | |
| May 15 | Partly cloudy | 22° /11° | 0.3 mm | 6 | |
| May 16 | Partly cloudy | 21° /13° | 1.2 mm | 6 | |
| May 17 | Patchy rain possible | 17° /9° | 0.1 mm | 4 | |
| May 18 | Sunny | 17° /7° | 0 mm | 5 | |
| May 19 | Overcast | 16° /8° | 0.1 mm | 4 | |
| May 20 | Moderate or heavy rain shower | 18° /10° | 18.5 mm | 4 | |
| May 21 | Overcast | 25° /12° | 24.9 mm | 6 | |
| May 22 | Cloudy | 23° /12° | 0.3 mm | 6 | |
| May 23 | Sunny | 23° /12° | 2.6 mm | 6 | |
| May 24 | Partly cloudy | 25° /12° | 1.2 mm | 7 | |
| May 25 | Partly cloudy | 19° /10° | 0 mm | 6 | |
| May 26 | Sunny | 21° /11° | 0.2 mm | 5 | |
| May 27 | Sunny | 21° /10° | 5.9 mm | 5 | |
| May 28 | Sunny | 28° /15° | 0.9 mm | 7 | |
| May 29 | Sunny | 20° /12° | 0.3 mm | 5 | |
| May 30 | Sunny | 18° /10° | 0 mm | 5 | |
| May 31 | Sunny | 23° /9° | 0 mm | 6 | |
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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.
Boston in May - FAQ
What are the expected maximum and minimum temperatures in Boston during May?
Enjoy moderate daytime temperatures of up to 21° and cooler nights around 8°. 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 166.9 mm is expected in Boston during May, occurring over more than 4 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 17 km/h, suggesting breezy to windy conditions, depending on your activities.
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