Allentown, PA: records

4 October 2026: The hottest day on record in Allentown, PA: 105°F on Sunday 3 July 1966.

The record begins: 1912

All-time records

Hottest day: 105°F; 3 July 1966
Coldest night: -15°F; 21 January 1994
Wettest day: 8.71 in; 8 October 2005
Warmest night: 79°F; 15 July 1995
Coldest day: 2°F; 19 January 1994

Daily records by decade

New daily records set in Allentown, PA by decade since the 1950s: the most record highs, 55, came in the 1950s; the most record lows, 86, in the 1960s.

Record highs
Record lows

Every decade as a table

Decade	Record highs	Record lows	Years in the record
1910s	0	0	8
1920s	0	0	10
1930s	0	0	10
1940s	0	0	10
1950s	55	79	10
1960s	49	86	10
1970s	50	41	10
1980s	49	36	10
1990s	49	31	10
2000s	34	26	10
2010s	43	13	10
2020s	21	5	7

Records by month

Month	Highest	Lowest	Wettest day
January	72°F 26 January 1950	-15°F 21 January 1994	2.37 in 5 January 1949
February	81°F 21 February 2018	-12°F 9 February 1934	2.94 in 13 February 2008
March	87°F 30 March 1998	-5°F 1 March 1934	2.99 in 11 March 1952
April	93°F 18 April 1976	12°F 1 April 1923	3.46 in 2 April 2005
May	97°F 19 May 1962	28°F 10 May 1947	3.23 in 31 May 1972
June	100°F 27 June 1966, 6 June 1925, 20 June 1923	39°F 11 June 1972, 1 June 1945, 8 June 1932	3.63 in 18 June 1938
July	105°F 3 July 1966	46°F 3 July 2001, 4 July 1933	5.67 in 10 July 2010
August	100°F 5 August 1955, 2 August 1955, 6 August 1924	41°F 30 August 1986, 31 August 1934, 30 August 1934	5.48 in 4 August 2020
September	99°F 2 September 1980, 3 September 1953, 2 September 1953	30°F 28 September 1947	6.37 in 16 September 1999
October	93°F 2 October 2019	21°F 31 October 1988, 22 October 1940, 28 October 1936	8.71 in 8 October 2005
November	81°F 1 November 1950	3°F 26 November 1938	3.45 in 2 November 2018
December	72°F 1 December 2006, 4 December 1998, 29 December 1984	-8°F 28 December 1950	2.68 in 6 December 1953

Streaks, months and years

Longest heat streak	19 days	27 June to 15 July 1966	A high of 90°F or above
Longest cold streak	18 days	27 January to 13 February 1978	A high of 32°F or below
Wettest month	13.47 in	August 2011
Driest month	0.02 in	October 2024
Wettest year	71.72 in	2011
Driest year	29.82 in	1980

Every record in words

The coldest night on record in Allentown, PA: a low of -15°F on Friday 21 January 1994.
The wettest day on record in Allentown, PA: 8.71 in on Saturday 8 October 2005.
The warmest night on record in Allentown, PA: a low of 79°F on Saturday 15 July 1995.
The coldest day on record in Allentown, PA: a high of 2°F on Wednesday 19 January 1994.
The longest run of days with a high of 90°F or above in Allentown, PA: 19 days, from Monday 27 June to Friday 15 July 1966.
The longest run of days with a high of 32°F or below in Allentown, PA: 18 days, from Friday 27 January to Monday 13 February 1978.
The wettest month on record in Allentown, PA: August 2011, with 13.47 in of precipitation.
The driest month on record in Allentown, PA: October 2024, with 0.02 in of precipitation.
The wettest year on record in Allentown, PA: 2011, with 71.72 in of precipitation.
The driest year on record in Allentown, PA: 1980, with 29.82 in of precipitation.

Allentown, PA the day's answers