Weather in New Hampshire

Calculated from weather data of Portsmouth International At Pease Airport (KPSM) between 2020 and 2024.

Maximum temperatures (°F)

Month	Average	2024	2023	2022	2021	2020
January	37.0	37.0	41.0	33.0	36.0	40.0
February	40.0	42.0	40.0	40.0	35.0	39.0
March	45.0	48.0	45.0	47.0	49.0	49.0
April	55.0		56.0	56.0	57.0	51.0
May	66.0		69.0	68.0	67.0	67.0
June	76.0		71.0	74.0	82.0	78.0
July	81.0		81.0	85.0	76.0	83.0
August	80.0		77.0	82.0	81.0	81.0
September	73.0		73.0	71.0	74.0	73.0
October	63.0		65.0	62.0	64.0	60.0
November	50.0		48.0	55.0	51.0	55.0
December	40.0		45.0	43.0	42.0	40.0
Average	57.0	42.0	59.0	60.0	60.0	60.0

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	23.0	25	29	16	24	25
February	24.0	25	22	22	22	25
March	30.0	34	31	30	29	32
April	39.0		41	40	39	37
May	48.0		47	50	49	47
June	58.0		56	56	62	58
July	64.0		66	65	62	66
August	63.0		62	64	65	63
September	56.0		58	54	59	54
October	47.0		49	45	49	45
November	33.0		32	37	34	37
December	27.0		32	29	29	28
Average	41.0	28.0	44.0	43.0	44.0	43.0

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	10	23	26	23
77 °F or warmer	0	67	80	67	76
68 °F or warmer	0	127	131	146	140
32 °F or colder	56	99	91	111	102

Precipitation (%)

Month	Average	2024	2023	2022	2021	2020
January	15.7	21	26	18	12	7
February	14.6	7	17	16	18	17
March	13.7	24	15	14	6	12
April	15.8		16	13	12	21
May	7.5		6	6	6	4
June	8.1		15	6	5	4
July	6.7		14	4	13	1
August	5.3		10	7	6	3
September	5.8		9	9	4	4
October	11.6		10	13	10	16
November	12.2		10	14	5	10
December	15.4		16	20	14	13
Average	11.3	17.5	13.1	10.4	8.9	8.7

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	9.1	9	8	10	9	8
February	9.2	9	9	10	9	8
March	10.8	11	11	10	11	11
April	10.4		10	11	10	11
May	9.2		10	9	9	11
June	7.9		8	8	8	7
July	7.1		6	8	7	7
August	7.2		7	7	6	8
September	7.4		6	8	8	9
October	7.8		6	7	8	8
November	8.9		8	10	8	9
December	8.5		7	12	7	9
Average	8.7	9.5	8.0	8.8	8.3	8.8

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	W	NW	NW	NW	W
February	W	W	W	NW	W
March	NW	NW	W	W	NW
April		NE	W	NW	NW
May		W	E	W	W
June		E	SW	SW	S
July		S	SW	N	S
August		S	S	S	SW
September		N	W	SW	S
October		W	NW	N	W
November		W	W	W	W
December		W	NW	W	W

Prevailing wind direction

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

New Hampshire weather Q&A

What is the warmest month in New Hampshire?

The warmest month is July with an average temperature of 81 °F over the past years.

What is the coldest month in New Hampshire?

The coldest month is January with an average daytime temperature of 37 °F in the past few years.

Which month is the wettest in New Hampshire?

Chance of precipitation is the highest in April with a probability of around 15.9 %.

Which month is the driest in New Hampshire?

The least rainfall and snow can be expected in August. The probability is about 5.4 %.