Keene Threshold Days by Year (USC00274399)

18 fixed thresholds counted per year at Keene (USC00274399): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Keene Thresholds

Keene: nights with a minimum temperature at or below 0 C (32 F) in 132 years, most in 1997 with 198.
Keene: nights with a minimum temperature at or below -10 C (14 F) in 132 years, most in 1904 with 87.
Keene: days with a maximum temperature at or above 30 C (86 F) in 131 years, most in 1983 with 59.
Keene: days with a maximum temperature at or above 90 F (32.2 C) in 131 years, most in 1955 with 33.
18 fixed thresholds have at least one qualifying day at Keene.

Days at or above 30 C (86 F)

131 years with a qualifying day

Days per year at Keene with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 59 in 1983.

Days at or above 30 C (86 F) per year at Keene
Year	Days	Decade average
1893	15	20.7
1894	22	20.7
1895	18	20.7
1896	24	20.7
1897	7	20.7
1898	32	20.7
1899	27	20.7
1900	31	21.3
1901	26	21.3
1902	8	21.3
1903	17	21.3
1904	15	21.3
1905	20	21.3
1906	26	21.3
1907	18	21.3
1908	30	21.3
1909	22	21.3
1910	25	23.3
1911	34	23.3
1912	20	23.3
1913	33	23.3
1914	22	23.3
1915	16	23.3
1916	18	23.3
1917	13	23.3
1918	26	23.3
1919	26	23.3
1920	18	18.3
1921	26	18.3
1922	16	18.3
1923	21	18.3
1924	16	18.3
1925	14	18.3
1926	16	18.3
1927	9	18.3
1928	20	18.3
1929	27	18.3
1930	30	24
1931	19	24
1932	18	24
1933	25	24
1934	19	24
1935	21	24
1936	18	24
1937	37	24
1938	24	24
1939	29	24
1940	17	29.3
1941	28	29.3
1942	22	29.3
1943	28	29.3
1944	37	29.3
1945	23	29.3
1946	19	29.3
1947	34	29.3
1948	28	29.3
1949	57	29.3
1950	31	33.9
1951	24	33.9
1952	42	33.9
1953	40	33.9
1954	17	33.9
1955	51	33.9
1956	25	33.9
1957	36	33.9
1958	22	33.9
1959	51	33.9
1960	22	30.8
1961	38	30.8
1962	29	30.8
1963	33	30.8
1964	35	30.8
1965	35	30.8
1966	46	30.8
1967	14	30.8
1968	29	30.8
1969	27	30.8
1970	38	28.6
1971	37	28.6
1972	17	28.6
1973	31	28.6
1974	21	28.6
1975	34	28.6
1976	26	28.6
1977	24	28.6
1978	29	28.6
1979	29	28.6
1980	36	32.1
1982	17	32.1
1983	59	32.1
1984	34	32.1
1985	20	32.1
1986	18	32.1
1987	34	32.1
1988	44	32.1
1989	27	32.1
1990	27	26.1
1991	30	26.1
1992	9	26.1
1993	25	26.1
1994	18	26.1
1995	33	26.1
1996	23	26.1
1997	28	26.1
1998	27	26.1
1999	41	26.1
2002	42	28.8
2003	26	28.8
2004	19	28.8
2005	43	28.8
2006	26	28.8
2007	41	28.8
2008	15	28.8
2009	18	28.8
2010	46	31
2011	27	31
2012	37	31
2013	27	31
2014	21	31
2015	32	31
2016	47	31
2017	22	31
2018	32	31
2019	19	31
2020	39	28
2021	25	28
2022	34	28
2023	19	28
2024	25	28
2025	32	28
2026	22	28

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

First to last qualifying date each year at Keene
Year	First date	Last date
1893	1893-05-12	1893-08-25
1894	1894-06-11	1894-09-09
1895	1895-05-07	1895-09-23
1896	1896-05-09	1896-09-11
1897	1897-06-24	1897-09-10
1898	1898-06-08	1898-10-01
1899	1899-05-01	1899-08-21
1900	1900-05-14	1900-09-06
1901	1901-04-29	1901-09-07
1902	1902-05-23	1902-09-01
1903	1903-04-30	1903-09-15
1904	1904-05-25	1904-08-01
1905	1905-06-15	1905-08-24
1906	1906-05-16	1906-09-21
1907	1907-05-14	1907-09-16
1908	1908-05-26	1908-10-17
1909	1909-06-21	1909-08-25
1910	1910-05-24	1910-08-25
1911	1911-05-11	1911-09-02
1912	1912-05-24	1912-07-15
1913	1913-04-25	1913-09-03
1914	1914-04-19	1914-09-23
1915	1915-04-25	1915-09-16
1916	1916-07-02	1916-09-14
1917	1917-06-20	1917-08-24
1918	1918-05-06	1918-08-25
1919	1919-05-29	1919-09-08
1920	1920-05-27	1920-09-26
1921	1921-05-21	1921-09-03
1922	1922-05-30	1922-10-01
1923	1923-05-26	1923-09-01
1924	1924-06-24	1924-09-01
1925	1925-06-03	1925-09-11
1926	1926-05-02	1926-08-29
1927	1927-04-20	1927-10-01
1928	1928-06-14	1928-10-12
1929	1929-04-08	1929-09-04
1930	1930-05-01	1930-10-13
1931	1931-05-28	1931-09-22
1932	1932-05-16	1932-09-12
1933	1933-05-26	1933-09-27
1934	1934-05-22	1934-09-26
1935	1935-06-29	1935-08-21
1936	1936-05-08	1936-08-16
1937	1937-05-31	1937-09-25
1938	1938-04-28	1938-08-20
1939	1939-05-07	1939-09-16
1940	1940-06-05	1940-08-17
1941	1941-04-15	1941-09-22
1942	1942-06-10	1942-09-18
1943	1943-05-17	1943-09-07
1944	1944-05-04	1944-10-07
1945	1945-04-13	1945-09-08
1946	1946-05-25	1946-08-09
1947	1947-05-24	1947-09-15
1948	1948-06-04	1948-09-18
1949	1949-05-04	1949-10-11
1950	1950-06-07	1950-10-01
1951	1951-05-15	1951-09-12
1952	1952-06-15	1952-09-12
1953	1953-05-10	1953-09-05
1954	1954-04-21	1954-10-12
1955	1955-05-04	1955-09-19
1956	1956-06-01	1956-10-15
1957	1957-04-27	1957-09-22
1958	1958-06-30	1958-09-26
1959	1959-05-20	1959-09-24
1960	1960-06-05	1960-09-08
1961	1961-05-14	1961-09-24
1962	1962-04-27	1962-09-01
1963	1963-06-01	1963-10-07
1964	1964-05-07	1964-09-11
1965	1965-05-09	1965-09-23
1966	1966-05-27	1966-09-02
1967	1967-06-02	1967-08-18
1968	1968-06-06	1968-09-25
1969	1969-04-28	1969-09-01
1970	1970-05-10	1970-09-25
1971	1971-05-19	1971-10-02
1972	1972-05-23	1972-09-01
1973	1973-04-22	1973-09-04
1974	1974-05-15	1974-08-22
1975	1975-05-19	1975-08-14
1976	1976-04-17	1976-08-26
1977	1977-05-17	1977-09-02
1978	1978-05-20	1978-09-21
1979	1979-05-09	1979-08-06
1980	1980-05-22	1980-09-22
1982	1982-07-07	1982-09-12
1983	1983-06-12	1983-09-21
1984	1984-05-26	1984-08-16
1985	1985-05-11	1985-09-22
1986	1986-05-18	1986-07-28
1987	1987-05-29	1987-09-11
1988	1988-05-28	1988-08-15
1989	1989-05-18	1989-09-11
1990	1990-04-27	1990-08-29
1991	1991-05-13	1991-09-17
1992	1992-05-22	1992-08-28
1993	1993-05-12	1993-09-16
1994	1994-05-23	1994-08-05
1995	1995-06-02	1995-09-06
1996	1996-05-21	1996-09-07
1997	1997-06-11	1997-08-17
1998	1998-03-29	1998-09-07
1999	1999-05-31	1999-09-05
2002	2002-04-17	2002-09-11
2003	2003-06-24	2003-08-23
2004	2004-04-20	2004-08-31
2005	2005-06-05	2005-09-15
2006	2006-05-29	2006-08-08
2007	2007-04-24	2007-10-05
2008	2008-06-08	2008-09-06
2009	2009-04-26	2009-08-22
2010	2010-04-08	2010-09-25
2011	2011-05-28	2011-09-04
2012	2012-04-17	2012-09-08
2013	2013-05-22	2013-09-12
2014	2014-06-04	2014-09-29
2015	2015-05-08	2015-09-10
2016	2016-05-26	2016-09-23
2017	2017-04-12	2017-09-28
2018	2018-05-03	2018-09-17
2019	2019-06-28	2019-08-20
2020	2020-05-27	2020-08-25
2021	2021-05-22	2021-08-28
2022	2022-05-14	2022-09-05
2023	2023-04-14	2023-09-09
2024	2024-05-22	2024-09-02
2025	2025-06-05	2025-08-18
2026	2026-05-19	2026-08-09

Every Fixed Threshold

Fixed thresholds at Keene
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	131	59	1983	22
35 C (95 F): Days	69	10	1911	1
40 C (104 F): Days	1	1	1911	1
90 F (32.2 C): Days	131	33	1955	6
100 F (37.8 C): Days	5	5	1911	1
0 C (32 F): Ice days (max	131	80	1904	37
0 C (32 F): Frost days (min	132	198	1997	104
-10 C (14 F): Days with min	132	87	1904	41
-20 C (-4 F): Days with min	129	31	1904	17
-30 C (-22 F): Days with min	39	6	1971	5
20 C (68 F): Tropical nights (min	114	16	1988	3
10 mm (0.39 in): Days with 10 mm or more rain	111	50	1953	30
25 mm (0.98 in): Days with 25 mm or more rain	111	16	1975	3
50 mm (1.97 in): Days with 50 mm or more rain	77	4	2005	1
100 mm (3.94 in): Days with 100 mm or more rain	3	1	1999	1
200 mm (7.87 in): Days with 200 mm or more rain	1	1	2005	1
10 cm (3.9 in): Days with 10 cm or more snowfall	74	13	1956	3
25 cm (9.8 in): Days with 25 cm or more snowfall	34	2	1960	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 Keene 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 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Keene Threshold Days by Year (USC00274399)

Key Facts for Keene Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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