Bethlehem Threshold Days by Year (USC00270703)

17 fixed thresholds counted per year at Bethlehem (USC00270703): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Bethlehem Thresholds

Bethlehem: days with a maximum temperature at or below 0 C (32 F) in 91 years, most in 1904 with 98.
Bethlehem: days with a maximum temperature at or above 30 C (86 F) in 90 years, most in 1988 with 21.
Bethlehem: nights with a minimum temperature at or below 0 C (32 F) in 89 years, most in 1972 with 200.
Bethlehem: nights with a minimum temperature at or below -10 C (14 F) in 89 years, most in 1904 with 101.
17 fixed thresholds have at least one qualifying day at Bethlehem.

Days at or above 30 C (86 F)

90 years with a qualifying day

Days per year at Bethlehem with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 21 in 1988.

Days at or above 30 C (86 F) per year at Bethlehem
Year	Days	Decade average
1893	5	7.7
1894	8	7.7
1895	11	7.7
1896	7	7.7
1897	7	7.7
1898	8	7.7
1899	8	7.7
1900	8	6
1901	9	6
1903	3	6
1904	1	6
1906	6	6
1908	10	6
1909	5	6
1910	3	7.2
1911	12	7.2
1912	9	7.2
1913	8	7.2
1914	6	7.2
1915	1	7.2
1916	10	7.2
1917	8	7.2
1918	8	7.2
1920	1	4.2
1921	10	4.2
1923	4	4.2
1924	5	4.2
1925	2	4.2
1926	2	4.2
1927	4	4.2
1928	5	4.2
1929	5	4.2
1930	3	8.8
1931	9	8.8
1932	2	8.8
1933	8	8.8
1934	10	8.8
1935	10	8.8
1936	5	8.8
1937	14	8.8
1938	14	8.8
1939	13	8.8
1940	4	12
1941	13	12
1942	10	12
1943	6	12
1944	20	12
1945	12	12
1946	7	12
1947	17	12
1948	11	12
1949	20	12
1950	3	6.2
1951	3	6.2
1952	10	6.2
1953	15	6.2
1954	1	6.2
1955	14	6.2
1956	2	6.2
1957	7	6.2
1958	1	6.2
1960	1	3.9
1961	2	3.9
1962	1	3.9
1963	10	3.9
1964	5	3.9
1966	1	3.9
1967	1	3.9
1968	8	3.9
1969	6	3.9
1970	12	10
1971	8	10
1972	5	10
1973	8	10
1974	7	10
1975	12	10
1976	8	10
1977	14	10
1978	12	10
1979	14	10
1980	2	8.1
1981	5	8.1
1982	7	8.1
1983	11	8.1
1984	5	8.1
1985	3	8.1
1986	5	8.1
1987	13	8.1
1988	21	8.1
1989	9	8.1

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

First to last qualifying date each year at Bethlehem
Year	First date	Last date
1893	1893-05-23	1893-08-11
1894	1894-06-16	1894-07-28
1895	1895-05-11	1895-09-23
1896	1896-07-02	1896-08-12
1897	1897-07-04	1897-07-10
1898	1898-07-03	1898-08-24
1899	1899-06-05	1899-08-21
1900	1900-06-27	1900-09-03
1901	1901-06-26	1901-07-18
1903	1903-07-09	1903-07-11
1904	1904-07-19	1904-07-19
1906	1906-07-15	1906-08-23
1908	1908-05-26	1908-08-13
1909	1909-06-22	1909-08-25
1910	1910-07-09	1910-07-24
1911	1911-05-21	1911-07-12
1912	1912-07-03	1912-07-15
1913	1913-06-27	1913-09-03
1914	1914-06-24	1914-09-23
1915	1915-09-15	1915-09-15
1916	1916-07-12	1916-08-21
1917	1917-07-22	1917-08-02
1918	1918-07-22	1918-08-23
1920	1920-08-08	1920-08-08
1921	1921-07-02	1921-07-27
1923	1923-06-19	1923-07-20
1924	1924-07-08	1924-08-31
1925	1925-06-06	1925-08-17
1926	1926-07-21	1926-07-22
1927	1927-07-12	1927-07-15
1928	1928-07-09	1928-08-17
1929	1929-05-30	1929-09-03
1930	1930-06-06	1930-06-16
1931	1931-06-20	1931-09-13
1932	1932-05-16	1932-08-26
1933	1933-06-09	1933-08-01
1934	1934-06-02	1934-08-19
1935	1935-07-05	1935-08-19
1936	1936-05-08	1936-08-16
1937	1937-05-31	1937-09-03
1938	1938-06-21	1938-08-17
1939	1939-06-10	1939-09-16
1940	1940-07-25	1940-08-18
1941	1941-04-20	1941-08-27
1942	1942-06-11	1942-09-18
1943	1943-06-25	1943-08-02
1944	1944-05-04	1944-08-17
1945	1945-06-14	1945-09-08
1946	1946-06-25	1946-08-09
1947	1947-06-11	1947-08-30
1948	1948-06-29	1948-09-13
1949	1949-06-13	1949-08-27
1950	1950-06-09	1950-07-13
1951	1951-07-09	1951-07-30
1952	1952-06-26	1952-08-28
1953	1953-05-10	1953-09-04
1954	1954-06-22	1954-06-22
1955	1955-06-18	1955-08-22
1956	1956-06-14	1956-06-15
1957	1957-06-15	1957-06-23
1958	1958-08-31	1958-08-31
1960	1960-06-18	1960-06-18
1961	1961-05-16	1961-07-25
1962	1962-05-20	1962-05-20
1963	1963-06-29	1963-07-30
1964	1964-06-21	1964-07-29
1966	1966-07-03	1966-07-03
1967	1967-06-04	1967-06-04
1968	1968-07-01	1968-07-19
1969	1969-06-12	1969-07-17
1970	1970-05-01	1970-08-15
1971	1971-05-19	1971-08-19
1972	1972-07-12	1972-07-18
1973	1973-06-11	1973-09-05
1974	1974-05-15	1974-07-15
1975	1975-05-20	1975-08-03
1976	1976-04-19	1976-08-22
1977	1977-05-21	1977-08-29
1978	1978-05-26	1978-08-16
1979	1979-05-09	1979-08-05
1980	1980-06-25	1980-06-26
1981	1981-06-16	1981-07-09
1982	1982-05-27	1982-07-19
1983	1983-06-13	1983-07-05
1984	1984-05-23	1984-06-11
1985	1985-07-15	1985-08-15
1986	1986-05-18	1986-07-29
1987	1987-05-30	1987-08-18
1988	1988-06-13	1988-08-13
1989	1989-05-18	1989-09-10

Every Fixed Threshold

Fixed thresholds at Bethlehem
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	90	21	1988	9
35 C (95 F): Days	2	3	1911	1
90 F (32.2 C): Days	54	10	1988	2
0 C (32 F): Ice days (max	91	98	1904	71
0 C (32 F): Frost days (min	89	200	1972	168
-10 C (14 F): Days with min	89	101	1904	90
-20 C (-4 F): Days with min	89	40	1934	31
-30 C (-22 F): Days with min	44	7	1968	1
20 C (68 F): Tropical nights (min	52	8	1941	2
25 C (77 F): Days with min	1	1	1947	1
10 mm (0.39 in): Days with 10 mm or more rain	62	45	1954	25
25 mm (0.98 in): Days with 25 mm or more rain	61	16	1983	3
50 mm (1.97 in): Days with 50 mm or more rain	30	3	1946	1
100 mm (3.94 in): Days with 100 mm or more rain	1	1	1983	1
10 cm (3.9 in): Days with 10 cm or more snowfall	43	12	1956	3
25 cm (9.8 in): Days with 25 cm or more snowfall	22	4	1969	1
50 cm (19.7 in): Days with 50 cm or more snowfall	1	1	1969	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1893.

Download the Data

Data for Bethlehem 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).

Bethlehem Threshold Days by Year (USC00270703)

Key Facts for Bethlehem Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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