Sanborn Threshold Days by Year (USC00137386)

19 fixed thresholds counted per year at Sanborn (USC00137386): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Sanborn Thresholds

Sanborn: nights with a minimum temperature at or below 0 C (32 F) in 110 years, most in 2013 with 190.
Sanborn: nights with a minimum temperature at or below -10 C (14 F) in 110 years, most in 1955 with 94.
Sanborn: nights with a minimum temperature at or below -20 C (-4 F) in 110 years, most in 1936 with 43.
Sanborn: days with a maximum temperature at or above 30 C (86 F) in 109 years, most in 1936 with 77.
19 fixed thresholds have at least one qualifying day at Sanborn.

Days at or above 30 C (86 F)

109 years with a qualifying day

Days per year at Sanborn with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 77 in 1936.

Days at or above 30 C (86 F) per year at Sanborn
Year	Days	Decade average
1915	5	38
1916	55	38
1917	30	38
1918	45	38
1919	55	38
1920	43	48.1
1921	71	48.1
1922	58	48.1
1923	42	48.1
1924	34	48.1
1925	71	48.1
1926	56	48.1
1927	40	48.1
1928	32	48.1
1929	34	48.1
1930	53	59
1931	76	59
1932	44	59
1933	59	59
1934	67	59
1935	56	59
1936	77	59
1937	54	59
1938	48	59
1939	56	59
1940	43	41.9
1941	55	41.9
1942	31	41.9
1943	44	41.9
1944	40	41.9
1945	28	41.9
1946	35	41.9
1947	49	41.9
1948	45	41.9
1949	49	41.9
1950	17	36.7
1951	14	36.7
1952	41	36.7
1953	40	36.7
1954	33	36.7
1955	58	36.7
1956	49	36.7
1957	33	36.7
1958	34	36.7
1959	48	36.7
1960	34	33.1
1961	32	33.1
1962	22	33.1
1964	41	33.1
1965	27	33.1
1966	36	33.1
1967	38	33.1
1968	44	33.1
1969	24	33.1
1970	67	43.4
1971	34	43.4
1972	37	43.4
1973	43	43.4
1974	38	43.4
1975	42	43.4
1976	59	43.4
1977	42	43.4
1978	44	43.4
1979	28	43.4
1980	46	38.4
1981	31	38.4
1982	19	38.4
1983	59	38.4
1986	28	38.4
1987	47	38.4
1988	49	38.4
1989	28	38.4
1990	35	23
1991	37	23
1992	7	23
1993	12	23
1994	17	23
1995	34	23
1996	17	23
1997	26	23
1998	33	23
1999	12	23
2000	29	28.2
2001	38	28.2
2002	46	28.2
2003	17	28.2
2004	9	28.2
2005	32	28.2
2006	44	28.2
2007	42	28.2
2008	11	28.2
2009	14	28.2
2010	31	28.1
2011	37	28.1
2012	52	28.1
2013	31	28.1
2014	7	28.1
2015	14	28.1
2016	28	28.1
2017	30	28.1
2018	33	28.1
2019	18	28.1
2020	37	37.7
2021	44	37.7
2022	42	37.7
2023	42	37.7
2024	20	37.7
2025	46	37.7
2026	33	37.7

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

First to last qualifying date each year at Sanborn
Year	First date	Last date
1915	1915-05-11	1915-08-16
1916	1916-05-05	1916-09-06
1917	1917-05-17	1917-09-16
1918	1918-05-03	1918-08-27
1919	1919-05-28	1919-09-20
1920	1920-05-31	1920-10-10
1921	1921-05-21	1921-09-23
1922	1922-06-04	1922-10-04
1923	1923-06-01	1923-09-26
1924	1924-05-05	1924-08-30
1925	1925-05-20	1925-09-20
1926	1926-04-29	1926-09-17
1927	1927-05-17	1927-09-17
1928	1928-05-09	1928-10-10
1929	1929-04-04	1929-09-03
1930	1930-05-03	1930-10-10
1931	1931-04-08	1931-09-20
1932	1932-05-13	1932-08-30
1933	1933-05-18	1933-09-25
1934	1934-04-30	1934-10-12
1935	1935-06-12	1935-09-24
1936	1936-05-05	1936-09-22
1937	1937-05-29	1937-09-22
1938	1938-06-05	1938-10-04
1939	1939-05-04	1939-09-22
1940	1940-05-12	1940-09-22
1941	1941-05-14	1941-09-20
1942	1942-05-29	1942-09-11
1943	1943-05-28	1943-09-05
1944	1944-05-14	1944-09-17
1945	1945-06-22	1945-09-07
1946	1946-06-06	1946-09-05
1947	1947-06-09	1947-10-05
1948	1948-05-20	1948-09-19
1949	1949-04-25	1949-08-26
1950	1950-05-23	1950-10-30
1951	1951-07-07	1951-08-30
1952	1952-05-03	1952-09-13
1953	1953-05-29	1953-10-02
1954	1954-04-14	1954-08-28
1955	1955-05-06	1955-09-18
1956	1956-05-21	1956-10-12
1957	1957-06-05	1957-08-31
1958	1958-05-11	1958-10-15
1959	1959-05-01	1959-09-08
1960	1960-04-22	1960-09-07
1961	1961-06-09	1961-09-09
1962	1962-04-25	1962-08-27
1964	1964-04-16	1964-09-09
1965	1965-04-30	1965-08-17
1966	1966-05-04	1966-09-10
1967	1967-04-30	1967-10-02
1968	1968-04-30	1968-08-24
1969	1969-05-27	1969-08-30
1970	1970-04-28	1970-09-20
1971	1971-06-03	1971-09-07
1972	1972-05-17	1972-09-19
1973	1973-05-21	1973-08-30
1974	1974-05-28	1974-09-26
1975	1975-05-19	1975-10-13
1976	1976-05-19	1976-10-03
1977	1977-04-09	1977-09-08
1978	1978-05-19	1978-09-11
1979	1979-05-17	1979-09-05
1980	1980-04-20	1980-09-08
1981	1981-04-27	1981-09-29
1982	1982-05-03	1982-08-19
1983	1983-05-27	1983-09-26
1986	1986-05-31	1986-08-25
1987	1987-04-19	1987-09-26
1988	1988-04-08	1988-09-18
1989	1989-05-24	1989-09-01
1990	1990-05-08	1990-09-27
1991	1991-04-07	1991-09-08
1992	1992-05-01	1992-08-10
1993	1993-06-12	1993-09-13
1994	1994-04-19	1994-09-15
1995	1995-06-15	1995-08-29
1996	1996-05-18	1996-08-07
1997	1997-06-20	1997-10-07
1998	1998-05-18	1998-09-27
1999	1999-06-09	1999-08-29
2000	2000-05-06	2000-09-18
2001	2001-05-10	2001-10-03
2002	2002-04-16	2002-09-09
2003	2003-06-16	2003-08-25
2004	2004-04-29	2004-09-20
2005	2005-06-21	2005-10-04
2006	2006-04-14	2006-10-04
2007	2007-04-30	2007-09-24
2008	2008-06-20	2008-09-02
2009	2009-05-20	2009-08-14
2010	2010-05-23	2010-10-09
2011	2011-05-11	2011-10-05
2012	2012-04-02	2012-09-11
2013	2013-05-15	2013-09-10
2014	2014-05-08	2014-08-22
2015	2015-06-10	2015-09-16
2016	2016-05-07	2016-09-25
2017	2017-06-04	2017-09-25
2018	2018-05-24	2018-10-04
2019	2019-06-05	2019-10-01
2020	2020-05-02	2020-09-07
2021	2021-05-02	2021-09-29
2022	2022-05-12	2022-09-21
2023	2023-04-13	2023-10-03
2024	2024-06-12	2024-09-29
2025	2025-03-29	2025-10-05
2026	2026-03-22	2026-09-02

Every Fixed Threshold

Fixed thresholds at Sanborn
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	109	77	1936	33
35 C (95 F): Days	82	34	1936	1
40 C (104 F): Days	5	10	1936	10
90 F (32.2 C): Days	106	59	1936	14
100 F (37.8 C): Days	19	19	1936	1
110 F (43.3 C): Days	1	1	1936	1
0 C (32 F): Ice days (max	109	107	1978	32
0 C (32 F): Frost days (min	110	190	2013	92
-10 C (14 F): Days with min	110	94	1955	32
-20 C (-4 F): Days with min	110	43	1936	8
-30 C (-22 F): Days with min	54	13	1936	1
20 C (68 F): Tropical nights (min	109	29	1955	21
25 C (77 F): Days with min	10	2	1947	1
10 mm (0.39 in): Days with 10 mm or more rain	109	37	2016	21
25 mm (0.98 in): Days with 25 mm or more rain	108	14	1937	7
50 mm (1.97 in): Days with 50 mm or more rain	77	5	2018	2
100 mm (3.94 in): Days with 100 mm or more rain	12	2	2018	1
10 cm (3.9 in): Days with 10 cm or more snowfall	93	8	1932	3
25 cm (9.8 in): Days with 25 cm or more snowfall	17	3	1951	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1915.

Download the Data

Data for Sanborn 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).

Sanborn Threshold Days by Year (USC00137386)

Key Facts for Sanborn Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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