Weather in Suffolk County

Calculated from weather data of General Edward Lawrence Logan International Airport (KBOS) between 2020 and 2024.

Maximum temperatures (°F)

Month	Average	2024	2023	2022	2021	2020
January	40.0	39.0	44.0	37.0	37.0	45.0
February	43.0	43.0	44.0	42.0	36.0	44.0
March	47.0	47.0	47.0	50.0	52.0	50.0
April	57.0		57.0	58.0	59.0	51.0
May	68.0		71.0	69.0	70.0	65.0
June	77.0		72.0	76.0	83.0	78.0
July	83.0		82.0	86.0	79.0	83.0
August	82.0		78.0	84.0	83.0	81.0
September	74.0		73.0	72.0	76.0	73.0
October	64.0		66.0	63.0	66.0	61.0
November	52.0		51.0	56.0	52.0	56.0
December	44.0		47.0	46.0	46.0	43.0
Average	59.0	43.0	61.0	62.0	62.0	61.0

Average highest temperature per day

The maximum temperature is typically observed some hours after noon.

Minimum temperatures (°F)

Month	Average	2024	2023	2022	2021	2020
January	28.0	29	33	21	26	33
February	29.0	29	28	26	26	32
March	33.0	37	35	35	34	35
April	43.0		45	44	44	39
May	52.0		52	53	54	49
June	61.0		60	60	66	60
July	69.0		69	69	67	69
August	68.0		66	69	71	67
September	61.0		62	59	64	59
October	52.0		53	51	54	49
November	39.0		37	43	39	41
December	32.0		36	34	34	31
Average	45.0	32.0	48.0	47.0	48.0	47.0

Average lowest temperature per day

The minimum temperature is typically observed just before sunrise.

Cold and hot days

Number of days	2024	2023	2022	2021	2020
86 °F or warmer	0	11	29	34	26
77 °F or warmer	0	72	80	78	73
68 °F or warmer	0	136	141	154	138
32 °F or colder	43	46	69	73	54

Precipitation (%)

Month	Average	2024	2023	2022	2021	2020
January	15.4	20	27	17	10	5
February	14.0	5	14	21	21	14
March	14.4	20	18	17	5	12
April	15.4		12	10	11	23
May	8.0		6	4	9	4
June	7.8		14	7	3	4
July	6.2		10	4	13	2
August	5.2		10	3	8	4
September	8.9		18	11	9	4
October	11.6		10	10	10	17
November	10.3		7	9	5	11
December	14.9		19	17	13	13
Average	11.1	15.3	13.1	9.8	9.5	8.8

Precipitation during daylight period

Percentage of observations with observed rain, drizzle, snow or hail. Only observations between sunrise and sunset are taken into account.

Wind speed (miles per hour)

Month	Average	2024	2023	2022	2021	2020
January	12.4	12	11	13	12	12
February	12.1	12	13	12	11	11
March	13.7	13	15	12	13	13
April	13.3		12	14	14	15
May	11.9		12	12	12	13
June	10.8		10	11	11	10
July	10.4		10	12	10	10
August	10.4		10	11	10	11
September	10.8		10	11	11	11
October	11.4		9	11	12	11
November	11.7		11	12	11	12
December	11.5		10	15	10	12
Average	11.7	12.4	11.0	11.8	11.2	11.7

Average wind speed

Excluding wind gusts. Only observations between sunrise and sunset are taken into account.

Prevailing wind direction

Month	2024	2023	2022	2021	2020
January	NW	NW	W	NW	W
February	W	NW	W	NW	W
March	NW	N	W	W	N
April		NE	W	NW	NW
May		NW	E	N	W
June		E	S	SW	S
July		S	SW	N	S
August		S	S	SE	S
September		NE	NW	SW	SE
October		W	N	NE	SW
November		W	W	W	W
December		NW	NW	W	W

Prevailing wind direction

Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.

Suffolk County weather Q&A

What is the warmest month in Suffolk County?

The warmest month is July with an average temperature of 83 °F over the past years.

What is the coldest month in Suffolk County?

The coldest month is January with an average daytime temperature of 40 °F in the past few years.

Which month is the wettest in Suffolk County?

Chance of precipitation is the highest in January with a probability of around 15.5 %.

Which month is the driest in Suffolk County?

The least rainfall and snow can be expected in August. The probability is about 5.2 %.