Chatham Exp Fa Threshold Days by Year

17 fixed thresholds counted per year at Chatham Exp Fa (USC00201484): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Chatham Exp Fa Thresholds

Chatham Exp Fa: days with a maximum temperature at or below 0 C (32 F) in 77 years, most in 1904 with 106.
Chatham Exp Fa: days with a maximum temperature at or above 30 C (86 F) in 75 years, most in 1931 with 29.
Chatham Exp Fa: nights with a minimum temperature at or below 0 C (32 F) in 75 years, most in 1926 with 220.
Chatham Exp Fa: nights with a minimum temperature at or below -10 C (14 F) in 75 years, most in 1912 with 112.
17 fixed thresholds have at least one qualifying day at Chatham Exp Fa.

Days at or above 30 C (86 F)

75 years with a qualifying day

Days per year at Chatham Exp Fa with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 29 in 1931.

Days at or above 30 C (86 F) per year at Chatham Exp Fa
Year	Days	Decade average
1901	9	6
1902	5	6
1903	7	6
1904	1	6
1905	5	6
1906	8	6
1907	2	6
1908	13	6
1909	4	6
1910	14	9.3
1911	8	9.3
1912	12	9.3
1913	12	9.3
1914	9	9.3
1915	1	9.3
1926	8	7.3
1927	6	7.3
1928	6	7.3
1929	9	7.3
1930	9	15.8
1931	29	15.8
1932	13	15.8
1933	20	15.8
1934	11	15.8
1935	12	15.8
1936	20	15.8
1937	25	15.8
1938	8	15.8
1939	11	15.8
1940	12	13.1
1941	23	13.1
1942	11	13.1
1943	10	13.1
1944	15	13.1
1945	11	13.1
1946	3	13.1
1947	19	13.1
1948	14	13.1
1949	13	13.1
1950	3	11
1951	6	11
1952	14	11
1953	14	11
1954	14	11
1955	27	11
1956	4	11
1957	10	11
1958	4	11
1959	14	11
1960	5	11.5
1961	16	11.5
1962	7	11.5
1963	14	11.5
1964	15	11.5
1965	5	11.5
1966	21	11.5
1967	5	11.5
1968	10	11.5
1969	17	11.5
1970	15	11.2
1971	8	11.2
1972	6	11.2
1973	17	11.2
1974	5	11.2
1975	21	11.2
1976	23	11.2
1977	7	11.2
1978	4	11.2
1979	6	11.2
1980	10	10.2
1981	5	10.2
1983	22	10.2
1985	2	10.2
1986	9	10.2
1987	13	10.2

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

First to last qualifying date each year at Chatham Exp Fa
Year	First date	Last date
1901	1901-06-26	1901-09-04
1902	1902-05-22	1902-07-29
1903	1903-06-05	1903-08-21
1904	1904-07-18	1904-07-18
1905	1905-07-14	1905-08-29
1906	1906-06-29	1906-09-10
1907	1907-06-16	1907-06-17
1908	1908-06-20	1908-09-21
1909	1909-06-20	1909-08-07
1910	1910-06-13	1910-08-12
1911	1911-05-27	1911-07-09
1912	1912-06-24	1912-09-09
1913	1913-05-01	1913-09-05
1914	1914-05-25	1914-08-09
1915	1915-04-24	1915-04-24
1926	1926-05-07	1926-08-29
1927	1927-06-28	1927-09-15
1928	1928-07-16	1928-08-16
1929	1929-05-29	1929-09-03
1930	1930-06-22	1930-08-31
1931	1931-05-15	1931-09-13
1932	1932-06-16	1932-08-31
1933	1933-06-02	1933-08-07
1934	1934-05-31	1934-08-18
1935	1935-07-03	1935-08-17
1936	1936-05-07	1936-08-23
1937	1937-05-30	1937-08-31
1938	1938-06-21	1938-10-10
1939	1939-05-30	1939-09-16
1940	1940-06-02	1940-08-17
1941	1941-06-18	1941-08-08
1942	1942-06-10	1942-08-31
1943	1943-06-19	1943-08-13
1944	1944-05-30	1944-08-15
1945	1945-06-22	1945-09-07
1946	1946-06-28	1946-08-07
1947	1947-07-04	1947-09-06
1948	1948-06-02	1948-09-17
1949	1949-06-11	1949-08-26
1950	1950-06-08	1950-07-10
1951	1951-05-02	1951-07-30
1952	1952-07-02	1952-09-13
1953	1953-07-15	1953-09-03
1954	1954-06-09	1954-08-25
1955	1955-07-01	1955-09-19
1956	1956-06-10	1956-06-13
1957	1957-06-17	1957-08-07
1958	1958-08-02	1958-08-09
1959	1959-06-07	1959-08-25
1960	1960-07-08	1960-09-07
1961	1961-06-04	1961-09-10
1962	1962-05-16	1962-08-28
1963	1963-06-05	1963-08-21
1964	1964-05-22	1964-08-02
1965	1965-07-04	1965-08-15
1966	1966-06-22	1966-09-01
1967	1967-07-21	1967-08-16
1968	1968-06-06	1968-08-23
1969	1969-05-28	1969-08-31
1970	1970-06-17	1970-08-13
1971	1971-06-06	1971-09-03
1972	1972-05-19	1972-08-30
1973	1973-06-15	1973-09-03
1974	1974-07-07	1974-07-14
1975	1975-05-23	1975-08-02
1976	1976-06-07	1976-09-13
1977	1977-05-20	1977-07-21
1978	1978-06-28	1978-09-06
1979	1979-06-15	1979-07-16
1980	1980-05-22	1980-08-24
1981	1981-07-06	1981-07-11
1983	1983-06-22	1983-09-04
1985	1985-05-09	1985-05-10
1986	1986-05-28	1986-07-24
1987	1987-06-18	1987-08-03

Every Fixed Threshold

Fixed thresholds at Chatham Exp Fa
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	75	29	1931	13
35 C (95 F): Days	21	8	1931	1
90 F (32.2 C): Days	63	20	1931	2
100 F (37.8 C): Days	3	8	1936	8
0 C (32 F): Ice days (max	77	106	1904	66
0 C (32 F): Frost days (min	75	220	1926	181
-10 C (14 F): Days with min	75	112	1912	48
-20 C (-4 F): Days with min	75	51	1912	5
-30 C (-22 F): Days with min	40	12	1912	1
20 C (68 F): Tropical nights (min	42	7	1955	3
25 C (77 F): Days with min	2	1	1901	1
10 mm (0.39 in): Days with 10 mm or more rain	62	35	1977	21
25 mm (0.98 in): Days with 25 mm or more rain	61	14	1979	6
50 mm (1.97 in): Days with 50 mm or more rain	29	4	1932	1
100 mm (3.94 in): Days with 100 mm or more rain	3	1	1932	1
10 cm (3.9 in): Days with 10 cm or more snowfall	60	30	1985	10
25 cm (9.8 in): Days with 25 cm or more snowfall	27	4	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 1901.

Download the Data

Data for Chatham Exp Fa 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 2026-10-15 (15 October 2026). Threshold counts are computed by this site.

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

Chatham Exp Fa Threshold Days by Year

Key Facts for Chatham Exp Fa Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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