Palmerton Threshold Days by Year (USC00366689)

19 fixed thresholds counted per year at Palmerton (USC00366689): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Palmerton Thresholds

Palmerton: days with 10 mm (0.39 in) or more of precipitation in 70 years, most in 1951 with 50.
Palmerton: days with 25 mm (0.98 in) or more of precipitation in 70 years, most in 1996 with 22.
Palmerton: days with a maximum temperature at or above 30 C (86 F) in 67 years, most in 1991 with 98.
Palmerton: days with a maximum temperature at or above 90 F (32.2 C) in 67 years, most in 1991 with 70.
19 fixed thresholds have at least one qualifying day at Palmerton.

Days at or above 30 C (86 F)

67 years with a qualifying day

Days per year at Palmerton with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 98 in 1991.

Days at or above 30 C (86 F) per year at Palmerton
Year	Days	Decade average
1919	50	50
1920	18	34.4
1921	37	34.4
1922	38	34.4
1923	47	34.4
1924	37	34.4
1925	42	34.4
1926	28	34.4
1927	24	34.4
1928	38	34.4
1929	35	34.4
1930	41	38.2
1931	38	38.2
1932	39	38.2
1933	37	38.2
1934	32	38.2
1935	26	38.2
1936	41	38.2
1938	44	38.2
1939	46	38.2
1940	41	39.2
1941	66	39.2
1942	49	39.2
1943	58	39.2
1944	45	39.2
1945	24	39.2
1946	20	39.2
1947	19	39.2
1948	28	39.2
1949	42	39.2
1950	14	28.6
1951	23	28.6
1952	36	28.6
1953	23	28.6
1954	27	28.6
1955	44	28.6
1956	20	28.6
1957	34	28.6
1958	26	28.6
1959	39	28.6
1960	13	33.1
1961	35	33.1
1962	31	33.1
1963	22	33.1
1964	39	33.1
1965	37	33.1
1966	49	33.1
1967	16	33.1
1968	34	33.1
1969	55	33.1
1970	69	49
1971	52	49
1972	39	49
1973	64	49
1974	42	49
1975	63	49
1979	14	49
1982	19	34.3
1984	24	34.3
1988	56	34.3
1989	38	34.3
1990	58	63.7
1991	98	63.7
1994	49	63.7
1995	77	63.7
1996	59	63.7
1997	41	63.7

For each year, a bar from the first to the last day at Palmerton meeting 30 C (86 F).

First to last qualifying date each year at Palmerton
Year	First date	Last date
1919	1919-05-04	1919-10-03
1920	1920-06-02	1920-08-17
1921	1921-05-22	1921-09-03
1922	1922-06-04	1922-10-06
1923	1923-04-21	1923-09-25
1924	1924-05-06	1924-09-02
1925	1925-04-23	1925-09-13
1926	1926-05-02	1926-09-25
1927	1927-04-20	1927-10-02
1928	1928-05-04	1928-10-12
1929	1929-04-07	1929-09-04
1930	1930-05-05	1930-09-16
1931	1931-05-16	1931-09-22
1932	1932-05-16	1932-09-20
1933	1933-05-20	1933-09-27
1934	1934-05-05	1934-08-11
1935	1935-05-28	1935-08-17
1936	1936-05-08	1936-09-12
1938	1938-04-28	1938-10-17
1939	1939-05-06	1939-10-10
1940	1940-05-14	1940-09-21
1941	1941-04-14	1941-10-07
1942	1942-04-24	1942-09-17
1943	1943-05-08	1943-09-06
1944	1944-05-05	1944-09-03
1945	1945-06-14	1945-09-07
1946	1946-06-08	1946-09-19
1947	1947-05-29	1947-09-13
1948	1948-05-11	1948-09-18
1949	1949-05-05	1949-10-10
1950	1950-06-07	1950-08-09
1951	1951-05-15	1951-10-05
1952	1952-06-15	1952-09-13
1953	1953-05-11	1953-09-05
1954	1954-06-11	1954-09-07
1955	1955-05-05	1955-08-22
1956	1956-05-13	1956-08-29
1957	1957-04-27	1957-09-13
1958	1958-06-30	1958-09-26
1959	1959-05-07	1959-10-06
1960	1960-04-23	1960-08-29
1961	1961-06-02	1961-09-24
1962	1962-04-26	1962-09-01
1963	1963-05-09	1963-10-07
1964	1964-05-09	1964-09-23
1965	1965-05-03	1965-09-22
1966	1966-06-04	1966-09-02
1967	1967-06-09	1967-08-18
1968	1968-06-06	1968-09-22
1969	1969-04-27	1969-10-12
1970	1970-04-29	1970-09-26
1971	1971-05-18	1971-09-15
1972	1972-04-19	1972-09-26
1973	1973-04-22	1973-09-05
1974	1974-04-29	1974-09-13
1975	1975-05-14	1975-10-15
1979	1979-05-09	1979-09-04
1982	1982-07-08	1982-09-12
1984	1984-05-22	1984-08-16
1988	1988-05-23	1988-08-28
1989	1989-05-18	1989-09-11
1990	1990-04-26	1990-09-13
1991	1991-05-12	1991-09-18
1994	1994-04-15	1994-09-13
1995	1995-05-24	1995-10-13
1996	1996-04-22	1996-09-10
1997	1997-06-10	1997-10-06

Every Fixed Threshold

Fixed thresholds at Palmerton
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	67	98	1991	41
35 C (95 F): Days	49	34	1991	5
40 C (104 F): Days	2	2	1975	1
90 F (32.2 C): Days	67	70	1991	15
100 F (37.8 C): Days	15	9	1991	1
0 C (32 F): Ice days (max	67	47	1945	12
0 C (32 F): Frost days (min	41	166	1997	166
-10 C (14 F): Days with min	41	50	1963	20
-20 C (-4 F): Days with min	23	11	1948	2
-30 C (-22 F): Days with min	1	1	1994	1
20 C (68 F): Tropical nights (min	40	31	1949	1
25 C (77 F): Days with min	2	1	1959	1
10 mm (0.39 in): Days with 10 mm or more rain	70	50	1951	32
25 mm (0.98 in): Days with 25 mm or more rain	70	22	1996	8
50 mm (1.97 in): Days with 50 mm or more rain	55	8	1952	2
100 mm (3.94 in): Days with 100 mm or more rain	8	2	1955	1
10 cm (3.9 in): Days with 10 cm or more snowfall	53	8	1994	4
25 cm (9.8 in): Days with 25 cm or more snowfall	15	2	1966	1
50 cm (19.7 in): Days with 50 cm or more snowfall	1	1	1925	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1919.

Download the Data

Data for Palmerton threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Palmerton Threshold Days by Year (USC00366689)

Key Facts for Palmerton Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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