Boston MA Recent May Temperatures, Rainfall

The numbers here describe what the May weather in Boston, Massachusetts was like for every year since 2010. A series of tables gives May data by year for temperature and precipitation.

They begin with average maximum and minimum temperatures in degrees Fahrenheit and Celsius. That's followed by how many really hot days occurred each May. Then there's information on how much rain actually landed this month during recent years, as well as how often Boston had wet weather.

The climate data come from weather measurements made at Boston's Logan International Airport.

Temperature

May temperature averages by year in Boston
High °F	Low °F	Year	High °C	Low °C
69	51	2023	21	11
69	52	2022	20	11
70	53	2021	21	12
66	48	2020	19	9
65	51	2019	18	10
72	53	2018	22	11
63	50	2017	17	10
67	51	2016	19	10
73	51	2015	23	11
66	51	2014	19	11
67	50	2013	20	10
67	54	2012	19	12
66	53	2011	19	11
72	54	2010	22	12

Number of days in May when the temperature in Boston rose to at least 70 or 90 degrees Fahrenheit
Year	70 °F 21 °C	90 °F 32 °C
2023	14	0
2022	16	0
2021	14	2
2020	12	0
2019	12	0
2018	15	1
2017	4	3
2016	14	1
2015	19	0
2014	8	0
2013	13	1
2012	13	0
2011	11	0
2010	19	1

Rain

This table gives the total precipitation that fell on Boston during May in each year from 2010. The number of days with precipitation counts the days when rainfall amounted to 0.01 inches (0.3 millimeters) or more.

Total rainfall for May in Boston
Days	Year	Inches	Millimetres
9	2023	2.3	57
9	2022	1.3	34
13	2021	4.9	125
9	2020	2.2	56
19	2019	3.4	85
10	2018	1.9	48
14	2017	3.5	88
10	2016	2.8	72
4	2015	1.2	31
13	2014	2.9	73
14	2013	3.2	82
13	2012	3.4	87
13	2011	3.2	82
8	2010	2.9	74

Boston - Recent May Temperatures and Rainfall

Temperature

Rain

Reference

More on Weather in Boston