Philadelphia PA Average Temperatures by Month

The numbers here tell you how hot and cold the weather usually is in Philadelphia, Pennsylvania during each month of the year.

The average high and low temperatures are listed below monthly and annually for Philadelphia, in both degrees Fahrenheit and Celsius.

Maximums and minimums are only part of the temperature picture. To fill in the rest, there's information on how many days a month get above or below a given temperature.

To find out how often it rises over 70, 80 or 90 °F each month in Philadelphia, scroll down farther. There are also monthly and yearly counts of days with cold weather.

The first set of high and low temperatures are averages for 2010 to 2019. Everything else here is based on 1991 to 2020 weather.

10-year temperature averages for Philadelphia, 2010 to 2019
High °F	Low °F		High °C	Low °C
41	26	January	5	-3
44	29	February	7	-2
53	35	March	12	2
66	46	April	19	8
76	57	May	24	14
84	65	June	29	19
89	72	July	32	22
86	69	August	30	21
80	63	September	27	17
68	52	October	20	11
55	39	November	13	4
47	34	December	8	1
66	49	Year	19	9

30-year temperature averages for Philadelphia, 1991 to 2020
High °F	Low °F		High °C	Low °C
41	26	January	5	-3
44	28	February	7	-3
53	34	March	12	1
65	44	April	18	7
74	54	May	24	12
83	64	June	28	18
88	70	July	31	21
86	68	August	30	20
79	61	September	26	16
67	49	October	20	10
56	39	November	13	4
46	31	December	8	0
65	47	Year	18	9

Days of Hot Weather in Philadelphia

The temperature at Philadelphia climbs into the 90s Fahrenheit for 30 days a year on average, scattered throughout spring and summer. Normally once a year the thermometer here reaches 100 °F (38 °C). A day of 100-degree weather can show up in June, July or August.

Days per month in Philadelphia of at least 70, 80 or 90 °F
	70 °F 21 °C	80 °F 27 °C	90 °F 32 °C
January	0	0	0
February	0	0	0
March	2	0	0
April	9	2	0
May	21	10	2
June	29	22	6
July	31	28	13
August	31	27	8
September	27	14	2
October	13	3	0
November	3	0	0
December	0	0	0
Year	166	107	30

How Often Philadelphia Has Cold Temperatures

The coldest nights of winter at Philadelphia drop down to 10 °F (-12 °C) or below, which happens twice a year on average.

From December to March, Philadelphia can remain below freezing all day long. The city typically has 13 days a year when the temperature never rises above 32 °F.

Days per month on average in Philadelphia when the minimum temperature drops to 10, 20, or 32 °F or below
	10 °F -12 °C	20 °F -8 °C	32 °F 0 °C
January	2	7	23
February	1	5	20
March	0	1	12
April	0	0	1
May	0	0	0
June	0	0	0
July	0	0	0
August	0	0	0
September	0	0	0
October	0	0	0
November	0	0	5
December	0	2	17
Year	2	16	77

Philadelphia Temperatures: Averages by Month

Days of Hot Weather in Philadelphia

How Often Philadelphia Has Cold Temperatures

References

More on Weather in Pennsylvania