Weather in Pennsylvania

Calculated from weather data of Lehigh Valley International Airport (KABE) between 2020 and 2024.

Maximum temperatures (°F)

Month	Average	2024	2023	2022	2021	2020
January	40.0	38.0	45.0	33.0	38.0	44.0
February	45.0	46.0	47.0	44.0	35.0	47.0
March	51.0	54.0	51.0	53.0	54.0	57.0
April	63.0		66.0	60.0	63.0	60.0
May	73.0		72.0	73.0	72.0	70.0
June	81.0		78.0	79.0	82.0	82.0
July	86.0		85.0	87.0	83.0	88.0
August	84.0		80.0	87.0	84.0	84.0
September	77.0		75.0	75.0	76.0	75.0
October	66.0		66.0	62.0	68.0	64.0
November	53.0		52.0	55.0	51.0	58.0
December	44.0		47.0	42.0	48.0	42.0
Average	61.0	46.0	64.0	63.0	63.0	64.0

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	26.0	28	33	19	26	30
February	28.0	27	28	23	23	31
March	33.0	36	32	33	34	38
April	43.0		44	40	42	43
May	52.0		46	53	50	51
June	60.0		57	59	62	60
July	67.0		66	66	65	68
August	65.0		63	65	67	65
September	58.0		58	55	58	56
October	48.0		46	42	52	46
November	34.0		31	37	32	37
December	30.0		33	29	33	27
Average	44.0	30.0	45.0	44.0	45.0	46.0

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	20	35	35	38
77 °F or warmer	0	96	100	97	100
68 °F or warmer	2	161	162	166	162
32 °F or colder	47	80	95	100	71

Precipitation (%)

Month	Average	2024	2023	2022	2021	2020
January	12.3	20	15	15	6	7
February	12.4	10	5	18	23	12
March	12.6	16	14	16	10	10
April	9.9		9	14	6	14
May	9.5		3	13	8	8
June	6.2		7	6	5	2
July	4.1		2	3	3	5
August	4.8		3	2	7	6
September	7.7		13	9	6	3
October	9.7		7	15	7	13
November	7.4		2	12	3	10
December	12.6		16	29	2	13
Average	9.5	15.4	7.5	11.4	7.0	8.1

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	8.7	8	8	8	10	8
February	8.3	7	8	9	8	8
March	10.1	10	10	10	10	9
April	9.7		9	10	10	11
May	7.9		7	8	8	9
June	7.5		8	7	7	7
July	6.3		6	7	6	6
August	6.5		7	7	6	7
September	6.9		8	8	8	6
October	7.6		7	8	8	7
November	8.0		7	8	7	8
December	7.7		7	8	6	9
Average	8.0	8.6	7.6	8.1	7.7	8.0

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	NW	NW	NW
February	W	W	W	NW	W
March	NW	NW	W	NW	NW
April		SW	W	W	NW
May		W	E	NW	W
June		NE	W	SW	W
July		SW	SW	W	W
August		W	W	SW	W
September		NE	NW	W	N
October		W	N	W	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.

Pennsylvania weather Q&A

What is the warmest month in Pennsylvania?

The warmest month is July with an average temperature of 86 °F over the past years.

What is the coldest month in Pennsylvania?

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

Which month is the wettest in Pennsylvania?

Chance of precipitation is the highest in March with a probability of around 12.6 %.

Which month is the driest in Pennsylvania?

The least rainfall and snow can be expected in July. The probability is about 4.1 %.