Allentown, PA: December

31 December 2025: December 2025 averaged 29°F in Allentown, PA, the coldest December since 2010, 18th coldest of 95.

December 2025

Mean temperature: 29°F; Coldest since 2010; 18th coldest of 95
Precipitation: 2.54 in; Driest since 2021; 37th driest of 111

A normal December in Allentown, PA (1991 to 2020): a mean temperature of 33.9°F, between 29.4°F and 38.2°F in eight years of ten and 3.75 in of precipitation, between 1.99 in and 6.25 in in eight years of ten.

The mean temperature of every December in Allentown, PA since 1928: 29°F in 2025; the lowest is 21.2°F, in 1989.

Normal range, 29.4 to 38.2°F

Every year, ranked, as a table

Every December in Allentown, PA from 1912 to 2025, 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
2025	29	78	37.2	76	20.8	88	2.54	75	0
2024	32.5	53	41	49	23.9	63	3.86	44	0
2023	39.3	2	46.7	9	31.8	2	8.62	1	0
2022	32.9	48	42.1	34	23.7	66	4.43	32	0
2021	39.1	3	47.2	7	31	4	1.29	105	0
2020	33.7	40	42.1	34	25.3	46	4.75	28	0
2019	35.9	18	43.4	25	28.5	18	3.42	56	0
2018	37.2	12	44.9	16	29.5	9	6.24	9	0
2017	31.6	60	39.2	64	24	62	1.88	93	0
2016	34.1	33	42.2	32	26	41	2.43	80	0
2015	45.8	1	53.6	1	37.9	1	4.20	36	0
2014	37	14	43.8	18	30.1	8	3.65	51	0
2013	31.7	57	40.3	54	23.2	70	4.04	40	0
2012	37.7	10	44.7	17	30.6	6	4.31	35	0
2011	38.4	6	48.1	3	28.6	15	4.18	37	0
2010	28.9	79	36.4	81	21.4	86	2.92	65	0
2009	31.4	61	38.6	66	24.1	60	6.30	8	0
2008	32.5	53	40.7	51	24.4	56	6.84	5	0
2007	33	45	39.5	63	26.4	38	5.02	23	0
2006	39	4	48.9	2	29.2	11	2.28	84	0
2005	29.5	74	37.3	75	21.8	82	3.57	54	0
2004	32.8	49	41.1	45	24.5	54	3.84	45	0
2003	33	45	41.1	45	24.9	50	4.97	24	0
2002	29.6	72	37.5	72	21.7	83	4.95	26	0
2001	38.2	8	47.8	4	28.6	15	1.92	92	0
2000	25.3	91	33.9	92	16.8	100	4.37	34	0
1999	34.9	28	43.5	22	26.3	39	2.45	79	0
1998	37.8	9	47.6	5	28	23	0.62	110	0
1997	33.6	41	41.2	42	25.9	42	2.37	82	0
1996	35.8	19	43.1	28	28.6	15	7.30	4	0
1995	26.7	87	33.8	94	19.7	92	2.00	90	0
1994	37.6	11	47.1	8	28.1	22	3.08	62	0
1993	33	45	41.2	42	24.9	50	4.96	25	0
1992	34	35	41.1	45	26.8	32	3.27	59	0
1991	35.6	21	43.5	22	27.8	24	3.50	55	0
1990	37.2	12	46	10	28.4	20	5.68	11	0
1989	21.2	95	28.7	98	13.7	103	1.31	104	0
1988	31.7	57	40.5	52	22.9	73	0.99	108	0
1987	34.9	28	42.3	30	27.5	26	1.49	100	0
1986	33.8	39	41.1	45	26.5	36	4.39	33	0
1985	29.4	76	37.1	77	21.7	83	1.71	97	0
1984	38.3	7	45.9	11	30.8	5	3.07	63	0
1983	28.6	81	35.2	86	22	81	7.61	3	0
1982	38.5	5	45.9	11	31.1	3	1.38	102	0
1981	30.6	65	36.8	80	24.4	56	3.18	60	0
1980	29.6	72	38.7	65	20.5	90	0.75	109	0
1979	36.2	17	43.7	20	28.7	13	2.48	77	0
1978	33.5	42	41.6	39	25.3	46	3.96	42	0
1977	30	69	36.2	83	23.8	64	5.54	12	0
1976	26.9	86	35.4	84	18.5	96	2.40	81	0
1975	32.7	51	40.1	58	25.3	46	2.72	70	0
1974	35.2	23	41.7	38	28.7	13	4.52	30	0
1973	35	24	42.3	30	27.8	24	7.89	2	0
1972	35	24	40.5	52	29.4	10	5.42	16	0
1971	36.4	16	43.8	18	29.1	12	1.32	103	0
1970	30.6	65	37.1	77	24.2	58	2.80	67	0
1969	28.4	82	34.6	88	22.2	76	6.43	7	0
1968	29.5	74	37	79	22.1	79	3.67	50	0
1967	32.6	52	40.3	54	24.9	50	5.13	21	0
1966	30.2	68	37.9	71	22.6	74	3.99	41	0
1965	33.9	36	42.2	32	25.5	45	1.79	95	0
1964	32.8	49	39.9	59	25.6	43	4.48	31	0
1963	24.9	92	32.2	97	17.6	98	2.19	86	0
1962	26.3	88	35.1	87	17.5	99	2.62	72	0
1961	29.8	71	37.4	74	22.2	76	3.84	45	0
1960	24.2	94	34	91	14.4	102	2.59	73	0
1959	34.1	33	41.5	41	26.6	35	3.76	48	0
1958	24.3	93	33.4	95	15.3	101	1.04	107	0
1957	35.5	22	43.5	22	27.5	26	5.52	14	0
1956	36.8	15	45.1	15	28.5	18	4.74	29	0
1955	25.8	90	33.9	92	17.7	97	0.39	111	0
1954	31.7	57	39.6	61	23.8	64	3.29	58	0
1953	35.8	19	45.2	14	26.5	36	5.75	10	0
1952	34.2	32	41.2	42	27.3	29	5.51	15	0
1951	32.3	55	40.9	50	23.7	66	5.23	19	0
1950	28.8	80	36.3	82	21.4	86	4.07	38	0
1949	33.5	42	42.6	29	25.1	49	3.17	61	2
1948	31.4	61	40.3	54	22.5	75	5.05	22	0
1947	30	69	38.3	69	21.7	83	1.79	95	0
1946	33.9	36	43.3	26	24.5	54	2.47	78	0
1945	26.3	88	33.3	96	19.3	94	3.79	47	0
1944	27	85	35.3	85	18.7	95	2.96	64	0
1943	29.2	77	38.5	68	19.8	91	1.21	106	0
1942	27.7	84	34.6	88	20.8	88	5.18	20	0
1941	35	24	41.8	37	28.2	21	3.34	57	0
1940	34.4	31	41.6	39	27.2	31			0
1939	33.9	36	40.2	57	27.5	26	2.51	76	0
1938	34.6	30	41.9	36	26.3	39	2.67	71	3
1937	31.8	56	39.6	61	24.1	60	1.61	98	2
1936			45.7	13	27.3	29	5.31	18	4
1935	28	83	34.4	90	22.1	79	1.61	98	3
1934					24.7	53	3.60	52	4
1933	30.5	67	38.6	66	22.2	76	1.82	94	3
1932	33.3	44	43.3	26	23.5	68	2.21	85	3
1931					30.2	7	2.11	89	7
1930	30.9	63	37.5	72	24.2	58	2.79	68	3
1929	30.7	64	38	70	23.4	69	2.86	66	1
1928	35	24	43.6	21	26.7	33	1.42	101	3
1927					26.7	33	6.54	6	6
1926					19.4	93	2.75	69	9
1925			39.9	59	25.6	43	2.32	83	4
1924					23	72	2.12	88	7
1923			47.4	6			5.35	17	18
1922					23.2	70	2.13	87	5
1919							1.98	91	31
1918							3.75	49	31
1917							2.58	74	31
1916							3.96	42	31
1915							4.82	27	31
1914							5.53	13	31
1913							4.07	38	31
1912							3.59	53	31

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
2015	45.8
2023	39.3
2021	39.1
2006	39
1982	38.5
2011	38.4
1984	38.3
2001	38.2
1998	37.8
2012	37.7

Coldest
Year	Mean, °F
1989	21.2
1960	24.2
1958	24.3
1963	24.9
2000	25.3
1955	25.8
1962	26.3
1945	26.3
1995	26.7
1976	26.9

Wettest
Year	Precipitation, in
2023	8.62
1973	7.89
1983	7.61
1996	7.30
2008	6.84
1927	6.54
1969	6.43
2009	6.30
2018	6.24
1953	5.75

Driest
Year	Precipitation, in
1955	0.39
1998	0.62
1980	0.75
1988	0.99
1958	1.04
1943	1.21
2021	1.29
1989	1.31
1971	1.32
1982	1.38

The hottest, coldest and wettest days

Hottest day: 59°F; 19 December 2025
Coldest night: 8°F; 9 December 2025
Wettest day: 0.59 in; 19 December 2025

Every month, season and year

Months

Seasons

Years

Allentown, PA the day's answers

All-time records

Every answer in words

December 2025 brought 2.54 in of precipitation in Allentown, PA, the driest December since 2021, 37th driest of 111.
The hottest day of December 2025 in Allentown, PA: 59°F on Friday 19 December 2025.
The coldest night of December 2025 in Allentown, PA: a low of 8°F on Tuesday 9 December 2025.
The wettest day of December 2025 in Allentown, PA: 0.59 in on Friday 19 December 2025.