Hatfield Threshold Days by Year (USC00473471)

20 fixed thresholds counted per year at Hatfield (USC00473471): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Hatfield Thresholds

Hatfield: days with a maximum temperature at or above 30 C (86 F) in 85 years, most in 1988 with 70.
Hatfield: days with a maximum temperature at or below 0 C (32 F) in 85 years, most in 1948 with 88.
Hatfield: days with a maximum temperature at or above 90 F (32.2 C) in 83 years, most in 1988 with 51.
Hatfield: nights with a minimum temperature at or below 0 C (32 F) in 82 years, most in 1917 with 214.
20 fixed thresholds have at least one qualifying day at Hatfield.

Days at or above 30 C (86 F)

85 years with a qualifying day

Days per year at Hatfield with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 70 in 1988.

Days at or above 30 C (86 F) per year at Hatfield
Year	Days	Decade average
1909	46	46
1910	49	31.2
1911	42	31.2
1912	28	31.2
1913	41	31.2
1914	19	31.2
1915	10	31.2
1916	42	31.2
1917	16	31.2
1918	34	31.2
1920	30	26.9
1921	50	26.9
1922	25	26.9
1923	41	26.9
1924	9	26.9
1925	35	26.9
1926	16	26.9
1927	14	26.9
1928	18	26.9
1929	31	26.9
1930	52	47.3
1931	60	47.3
1932	33	47.3
1933	65	47.3
1934	55	47.3
1935	30	47.3
1936	57	47.3
1937	51	47.3
1938	20	47.3
1939	50	47.3
1940	32	34.7
1941	45	34.7
1942	19	34.7
1943	46	34.7
1944	37	34.7
1945	24	34.7
1946	24	34.7
1947	54	34.7
1948	36	34.7
1949	30	34.7
1950	18	30
1951	11	30
1952	38	30
1953	32	30
1954	31	30
1955	48	30
1957	30	30
1958	24	30
1959	38	30
1960	27	33.1
1961	40	33.1
1962	28	33.1
1963	43	33.1
1964	46	33.1
1965	17	33.1
1966	40	33.1
1967	21	33.1
1968	35	33.1
1969	34	33.1
1970	52	37.6
1971	26	37.6
1972	42	37.6
1973	36	37.6
1974	25	37.6
1975	45	37.6
1976	55	37.6
1977	43	37.6
1978	35	37.6
1979	17	37.6
1980	45	36
1981	16	36
1982	18	36
1983	57	36
1984	23	36
1985	29	36
1986	24	36
1987	46	36
1988	70	36
1989	32	36
1990	18	21
1991	24	21
2005	34	26.3
2006	31	26.3
2007	29	26.3
2008	11	26.3

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

First to last qualifying date each year at Hatfield
Year	First date	Last date
1909	1909-05-06	1909-09-20
1910	1910-04-28	1910-09-17
1911	1911-05-05	1911-09-16
1912	1912-05-23	1912-09-09
1913	1913-04-30	1913-09-07
1914	1914-05-26	1914-09-20
1915	1915-06-27	1915-09-06
1916	1916-07-01	1916-09-06
1917	1917-05-17	1917-09-16
1918	1918-05-03	1918-08-26
1920	1920-05-31	1920-09-26
1921	1921-05-20	1921-09-09
1922	1922-05-10	1922-09-07
1923	1923-06-01	1923-09-05
1924	1924-07-15	1924-08-31
1925	1925-05-20	1925-09-20
1926	1926-05-07	1926-08-29
1927	1927-05-21	1927-09-15
1928	1928-05-09	1928-08-28
1929	1929-05-28	1929-09-04
1930	1930-05-05	1930-10-10
1931	1931-05-15	1931-09-20
1932	1932-05-14	1932-08-31
1933	1933-06-01	1933-09-09
1934	1934-05-06	1934-08-19
1935	1935-07-03	1935-09-24
1936	1936-05-08	1936-09-22
1937	1937-05-29	1937-09-23
1938	1938-05-02	1938-08-22
1939	1939-04-24	1939-09-16
1940	1940-05-12	1940-09-20
1941	1941-05-26	1941-09-21
1942	1942-06-05	1942-09-11
1943	1943-06-03	1943-09-02
1944	1944-05-29	1944-09-17
1945	1945-06-23	1945-09-08
1946	1946-06-07	1946-08-17
1947	1947-06-06	1947-10-21
1948	1948-05-20	1948-09-19
1949	1949-05-03	1949-08-27
1950	1950-06-06	1950-10-18
1951	1951-07-15	1951-08-28
1952	1952-04-28	1952-09-13
1953	1953-05-29	1953-10-16
1954	1954-06-09	1954-09-06
1955	1955-05-02	1955-09-18
1957	1957-05-01	1957-09-01
1958	1958-06-28	1958-08-30
1959	1959-05-02	1959-09-09
1960	1960-04-22	1960-09-08
1961	1961-05-12	1961-09-10
1962	1962-04-26	1962-08-30
1963	1963-06-02	1963-10-06
1964	1964-05-18	1964-08-27
1965	1965-05-02	1965-08-17
1966	1966-05-26	1966-09-02
1967	1967-05-18	1967-08-25
1968	1968-05-15	1968-09-03
1969	1969-05-27	1969-08-31
1970	1970-04-27	1970-09-08
1971	1971-06-04	1971-09-08
1972	1972-05-17	1972-08-30
1973	1973-06-09	1973-09-02
1974	1974-05-21	1974-08-21
1975	1975-05-19	1975-08-24
1976	1976-06-05	1976-10-02
1977	1977-04-11	1977-09-01
1978	1978-05-25	1978-09-11
1979	1979-05-10	1979-09-05
1980	1980-04-21	1980-09-09
1981	1981-06-05	1981-09-11
1982	1982-06-28	1982-09-11
1983	1983-06-10	1983-09-09
1984	1984-06-07	1984-09-19
1985	1985-04-18	1985-09-20
1986	1986-05-29	1986-09-26
1987	1987-04-18	1987-09-27
1988	1988-05-20	1988-09-11
1989	1989-06-05	1989-08-22
1990	1990-04-25	1990-09-13
1991	1991-04-06	1991-08-30
2005	2005-06-08	2005-09-14
2006	2006-05-29	2006-08-05
2007	2007-04-30	2007-09-06
2008	2008-07-02	2008-09-03

Every Fixed Threshold

Fixed thresholds at Hatfield
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	85	70	1988	11
35 C (95 F): Days	59	25	1988	1
40 C (104 F): Days	3	5	1936	1
90 F (32.2 C): Days	83	51	1988	8
100 F (37.8 C): Days	12	11	1936	1
0 C (32 F): Ice days (max	85	88	1948	80
0 C (32 F): Frost days (min	82	214	1917	178
-10 C (14 F): Days with min	82	101	1937	88
-20 C (-4 F): Days with min	82	53	1978	47
-30 C (-22 F): Days with min	75	17	1929	2
-40 C (-40 F): Days with min	23	3	1917	1
20 C (68 F): Tropical nights (min	73	16	1931	6
25 C (77 F): Days with min	1	1	1988	1
10 mm (0.39 in): Days with 10 mm or more rain	78	48	1911	28
25 mm (0.98 in): Days with 25 mm or more rain	77	14	1911	5
50 mm (1.97 in): Days with 50 mm or more rain	56	4	1912	1
100 mm (3.94 in): Days with 100 mm or more rain	4	1	1912	1
10 cm (3.9 in): Days with 10 cm or more snowfall	53	9	1945	7
25 cm (9.8 in): Days with 25 cm or more snowfall	10	3	1945	1
50 cm (19.7 in): Days with 50 cm or more snowfall	1	1	2005	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1909.

Download the Data

Data for Hatfield 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).

Hatfield Threshold Days by Year (USC00473471)

Key Facts for Hatfield Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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