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Allentown August Weather

Averages and records for weather in Allentown, Pennsylvania in the month of August.

Typical Allentown August Weather 1991–2020
Average daily high	83.4 °F
Average daily low	62.2 °F
Average monthly precipitation	4.6 inches
Average monthly snow	none
Daily chance of precipitation	32.8%
Daily chance of snow	0%

Allentown August Weather Records 1894–2024
Highest temperature	105 °F	August 7, 1918
Lowest temperature	41 °F	August 30, 1986
Highest daily low	83 °F	August 10, 1913
Lowest daily high	59 °F	August 31, 1911
Hottest average high temperature	89.7 °F	1938
Coldest average high temperature	76.8 °F	1927
Most daily precipitation	4.9 inches	August 4, 2020
Most monthly precipitation	13.5 inches	2011
Most daily snow	none	-
Most monthly snow	none	-

Note: Daily averages are a moving average which includes 14 days before and after

Day	Average (°F)		Record (°F)
Day	High	Low	High	Low
August 1	84.9	64.1	98	52
August 2	84.8	64.0	100	51
August 3	84.7	63.9	98	51
August 4	84.6	63.8	98	50
August 5	84.4	63.7	100	46
August 6	84.3	63.6	101	47
August 7	84.2	63.4	105	49
August 8	84.1	63.2	101	49
August 9	84.0	63.1	98	50
August 10	83.9	62.9	99	51
August 11	83.8	62.8	98	47
August 12	83.8	62.6	99	50
August 13	83.7	62.5	98	48
August 14	83.6	62.5	99	48
August 15	83.5	62.4	97	48
August 16	83.4	62.2	96	50
August 17	83.2	62.0	96	46
August 18	83.0	61.8	96	47
August 19	82.8	61.6	95	48
August 20	82.7	61.4	98	47
August 21	82.7	61.4	98	45
August 22	82.6	61.3	101	46
August 23	82.4	61.1	97	47
August 24	82.3	60.9	97	47
August 25	82.2	60.7	95	45
August 26	82.0	60.5	99	47
August 27	81.8	60.4	98	46
August 28	81.6	60.1	97	46
August 29	81.4	59.8	97	43
August 30	81.2	59.5	97	41
August 31	81.0	59.3	99	43

Weather Station Details

Years	Station	Coordinates
1948–2024	Allentown International Airport	location
1894–1947	Bethlehem Lehigh University	location