Allentown, PA: May

31 May 2026: May 2026 averaged 60.5°F in Allentown, PA, the coldest May since 2023, 50th coldest of 104.

May 2026

Mean temperature: 60.5°F; Coldest since 2023; 50th coldest of 104
Precipitation: 2.19 in; Driest since 2023; 19th driest of 110

A normal May in Allentown, PA (1991 to 2020): a mean temperature of 60.9°F, between 56.7°F and 65.9°F in eight years of ten and 3.81 in of precipitation, between 1.76 in and 4.96 in in eight years of ten.

The mean temperature of every May in Allentown, PA since 1922: 60.5°F in 2026; the lowest is 52.8°F, in 1967.

Normal range, 56.7 to 65.9°F

Every year, ranked, as a table

Every May in Allentown, PA from 1912 to 2026, ranked: the mean temperature, the mean high and the mean low from the warmest, the precipitation from the wettest; a year missing more than a tenth of its days is not ranked.

Year	Mean, °F	Rank	High, °F	Rank	Low, °F	Rank	Precipitation, in	Rank	Days missing
2026	60.5	55	71.7	57	49.3	50	2.19	92	0
2025	60.8	49	70.6	69	51.1	30	10.45	2	0
2024	63.4	20	73	38	53.7	8	3.77	55	0
2023	58.6	80	72.8	42	44.5	101	0.24	109	0
2022	62.8	25	73.7	33	51.8	24	5.27	23	0
2021	60.3	56	72.4	46	48.2	70	3.56	59	0
2020	60	62	70.6	69	49.3	50	2.68	78	0
2019	64.6	10	74.2	28	55.1	3	9.10	4	0
2018	65.7	6	76.4	11	55	4	4.89	25	0
2017	59.8	66	70	74	49.7	44	4.21	44	0
2016	61	45	71.5	59	50.4	36	4.05	48	0
2015	66.3	2	80.1	1	52.6	13	0.82	108	0
2014	61.5	39	73.1	37	50	41	4.27	41	0
2013	60.9	46	73	38	48.8	59	2.27	89	0
2012	66.1	3	76.5	9	55.8	1	5.63	17	0
2011	64.2	14	74.8	23	53.5	9	4.37	37	0
2010	63.2	21	74.3	27	52.1	18	3.85	51	0
2009	60.3	56	71.1	62	49.6	46	4.64	30	0
2008	56.3	99	68.7	86	44	104	3.89	50	0
2007	62.4	28	76.3	13	48.6	62	2.37	84	0
2006	60.9	46	73.2	35	48.6	62	1.80	96	0
2005	56.3	99	68.5	89	44.1	103	1.23	106	0
2004	65.9	5	76.5	9	55.2	2	3.77	55	0
2003	57.3	92	66.4	101	48.1	72	3.20	65	0
2002	57.4	91	69.1	80	45.7	94	4.42	35	0
2001	60.6	52	72.2	47	49	55	4.38	36	0
2000	61.2	42	72.1	50	50.3	38	5.54	18	0
1999	59.5	67	72	51	47	82	3.27	63	0
1998	65	8	76	14	54	6	4.58	31	0
1997	55.7	103	67.1	99	44.3	102	3.23	64	0
1996	56.7	97	67.6	97	45.8	92	2.16	93	0
1995	59.9	64	70.3	71	49.5	47	2.93	74	0
1994	59.5	67	71.5	59	47.5	78	2.67	79	0
1993	63	23	74.9	22	51	33	1.43	100	0
1992	59.3	71	69.5	76	49	55	4.88	26	0
1991	67.2	1	79.4	2	55	4	2.90	75	0
1990	58.8	75	68.5	89	49.1	54	6.66	12	0
1989	59.3	71	69.1	80	49.5	47	9.52	3	0
1988	61.6	37	72	51	51.2	29	7.43	8	0
1987	61.5	39	72.7	44	50.4	36	2.28	88	0
1986	64.5	12	76.7	7	52.4	16	1.83	95	0
1985	63.5	19	75.1	20	52	20	5.47	21	0
1984	58.7	78	68.6	88	48.8	59	10.62	1	0
1983	58.3	82	68.7	86	47.8	74	4.21	44	0
1982	62.4	28	73	38	51.9	22	4.02	49	0
1981	61.2	42	73.2	35	49.2	52	4.82	28	0
1980	63.8	17	74.6	25	53	11	3.38	62	0
1979	62.1	33	71.7	57	52.5	14	4.85	27	0
1978	60.8	49	70.1	72	51.4	27	5.52	19	0
1977	63.9	16	76.6	8	51.1	30	1.75	97	0
1976	58.3	82	69	82	47.6	76	3.12	66	0
1975	64.1	15	74.2	28	54	6	4.25	43	0
1974	59	73	69.4	78	48.7	61	3.85	51	0
1973	56.2	101	65.3	103	47.1	81	5.51	20	0
1972	61.3	41	72.8	42	49.9	42	6.20	14	0
1971	56.8	95	68	94	45.7	94	5.30	22	0
1970	60.8	49	70.9	64	50.7	35	2.97	72	0
1969	62.4	28	75	21	49.8	43	1.90	94	0
1968	56.2	101	66.6	100	45.8	92	6.74	11	0
1967	52.8	104	63.6	104	42	105	4.44	34	0
1966	56.5	98	67.6	97	45.3	98	2.53	82	0
1965	64.3	13	77	6	51.6	26	1.34	103	0
1964	62.2	32	75.9	15	48.5	66	0.09	110	0
1963	58.6	80	70.7	67	46.5	90	1.67	99	0
1962	63	23	74.6	25	51.3	28	1.26	104	0
1961	57.6	88	68.3	93	46.9	83	2.36	85	0
1960	58.8	75	69.5	76	48.1	72	3.60	58	0
1959	63.7	18	75.6	17	51.9	22	1.39	102	0
1958	57.7	87	68.5	89	46.9	83	3.05	68	0
1957	59.9	64	72.2	47	47.5	78	2.35	86	0
1956	56.8	95	68.9	84	44.6	100	3.83	54	0
1955	62.7	26	75.2	19	50.2	40	3.11	67	0
1954	57.6	88	67.9	96	46.9	83	3.67	57	1
1953	62	34	71.5	59	52.5	14	6.46	13	0
1952	58	84	69	82	46.9	83	6.20	14	0
1951	60.9	46	72.9	41	48.9	58	4.27	41	0
1950	58.7	78	68.8	85	48.5	66	4.53	33	0
1949	61.1	44	73.6	34	48.6	62	4.20	46	0
1948	59.5	67	69.9	75	49.2	52	7.88	7	0
1947	58.9	74	70.8	65	46.9	83	6.77	10	0
1946	60	62	71.8	55	48.2	70	6.80	9	0
1945	57	94	68.4	92	45.6	97	4.36	38	0
1944	66	4	79.3	3	52.7	12	1.24	105	0
1943	61.8	36	71.9	54	51.7	25	4.18	47	0
1942	64.6	10	75.8	16	53.4	10	8.68	5	0
1941	62.5	27	76.4	11	48.6	62	1.40	101	0
1940	60.6	52	70.8	65	50.3	38			0
1939	65.3	7	78.5	4	52.1	18	1.73	98	0
1938	59.5	67	70.1	72	49	55	2.98	71	0
1937	63.2	21	75.5	18	50.8	34	2.81	77	0
1936					51.1	30	2.87	76	4
1935	57.5	90	69.3	79	45.7	94	1.04	107	0
1934	61.6	37	73.8	32	49.5	47	4.57	32	2
1933	62	34	72	51	52	20	6.11	16	0
1932	60.1	61	71.8	55	48.5	66	4.73	29	3
1931	60.2	59	72.2	47	48.4	69	3.01	69	2
1930	62.3	31	74.8	23	49.7	44	3.85	51	2
1929	60.3	56	72.7	44	47.3	80	2.66	80	3
1928	58.8	75	71	63	46.9	83	2.50	83	1
1927	57.9	85	68	94	47.8	74	3.55	61	1
1926	60.6	52	74.2	28	46.9	83	2.31	87	0
1925	57.8	86	70.7	67	45	99	3.56	59	2
1924	57.1	93	66.2	102	47.6	76	5.07	24	1
1923	60.2	59	74.1	31	46.1	91	3.01	69	2
1922	65	8	77.5	5	52.3	17	4.33	39	3
1919							8.07	6	31
1917							2.27	89	31
1916							2.20	91	31
1914							2.96	73	31
1913							2.60	81	31
1912							4.32	40	31

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
1991	67.2
2015	66.3
2012	66.1
1944	66
2004	65.9
2018	65.7
1939	65.3
1998	65
1922	65
2019	64.6
More years share the last value

Coldest
Year	Mean, °F
1967	52.8
1997	55.7
1973	56.2
1968	56.2
2008	56.3
2005	56.3
1966	56.5
1996	56.7
1971	56.8
1956	56.8

Wettest
Year	Precipitation, in
1984	10.62
2025	10.45
1989	9.52
2019	9.10
1942	8.68
1919	8.07
1948	7.88
1988	7.43
1946	6.80
1947	6.77

Driest
Year	Precipitation, in
1964	0.09
2023	0.24
2015	0.82
1935	1.04
2005	1.23
1944	1.24
1962	1.26
1965	1.34
1959	1.39
1941	1.40

The hottest, coldest and wettest days

Hottest day: 94°F; 19 May 2026, 18 May 2026
Coldest night: 36°F; 1 May 2026
Wettest day: 0.53 in; 24 May 2026

Every month, season and year

Months

Seasons

Years

Allentown, PA the day's answers

All-time records

Every answer in words

May 2026 brought 2.19 in of precipitation in Allentown, PA, the driest May since 2023, 19th driest of 110.
The hottest day of May 2026 in Allentown, PA: 94°F on Tuesday 19 May 2026 and Monday 18 May 2026.
The coldest night of May 2026 in Allentown, PA: a low of 36°F on Friday 1 May 2026.
The wettest day of May 2026 in Allentown, PA: 0.53 in on Sunday 24 May 2026.