Tombstone Threshold Days by Year (USC00028619)

16 fixed thresholds counted per year at Tombstone (USC00028619): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Tombstone Thresholds

Tombstone: days with 10 mm (0.39 in) or more of precipitation in 113 years, most in 1905 with 23.
Tombstone: days with a maximum temperature at or above 30 C (86 F) in 111 years, most in 1989 with 172.
Tombstone: days with a maximum temperature at or above 35 C (95 F) in 111 years, most in 2020 with 96.
Tombstone: days with a maximum temperature at or above 90 F (32.2 C) in 111 years, most in 2020 with 136.
16 fixed thresholds have at least one qualifying day at Tombstone.

Days at or above 30 C (86 F)

111 years with a qualifying day

Days per year at Tombstone with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 172 in 1989.

Days at or above 30 C (86 F) per year at Tombstone
Year	Days	Decade average
1898	93	93
1901	115	96.5
1905	82	96.5
1906	72	96.5
1907	68	96.5
1908	121	96.5
1909	121	96.5
1910	135	134.1
1911	127	134.1
1912	119	134.1
1913	144	134.1
1914	137	134.1
1915	146	134.1
1916	148	134.1
1919	117	134.1
1920	133	128.6
1921	130	128.6
1922	147	128.6
1923	94	128.6
1924	147	128.6
1925	126	128.6
1926	118	128.6
1927	127	128.6
1928	126	128.6
1929	138	128.6
1930	119	130.9
1931	123	130.9
1932	135	130.9
1933	128	130.9
1934	156	130.9
1935	121	130.9
1936	140	130.9
1937	147	130.9
1938	128	130.9
1939	112	130.9
1940	74	135.8
1941	131	135.8
1942	145	135.8
1943	156	135.8
1944	124	135.8
1945	155	135.8
1946	142	135.8
1948	159	135.8
1950	146	139.7
1954	153	139.7
1955	124	139.7
1956	153	139.7
1957	128	139.7
1958	135	139.7
1959	139	139.7
1960	148	137.5
1961	138	137.5
1962	148	137.5
1963	150	137.5
1964	135	137.5
1965	144	137.5
1966	125	137.5
1967	112	137.5
1970	126	119.2
1971	121	119.2
1972	120	119.2
1973	129	119.2
1974	124	119.2
1975	113	119.2
1976	95	119.2
1977	112	119.2
1978	136	119.2
1979	116	119.2
1980	120	123.5
1981	114	123.5
1982	117	123.5
1983	122	123.5
1984	106	123.5
1985	117	123.5
1986	122	123.5
1987	115	123.5
1988	130	123.5
1989	172	123.5
1990	112	137.7
1991	140	137.7
1992	134	137.7
1993	139	137.7
1994	137	137.7
1995	137	137.7
1996	152	137.7
1997	147	137.7
1998	139	137.7
1999	140	137.7
2000	159	129.9
2001	149	129.9
2002	133	129.9
2003	136	129.9
2004	120	129.9
2005	115	129.9
2007	115	129.9
2008	112	129.9
2010	126	140
2011	140	140
2012	152	140
2013	134	140
2014	135	140
2015	129	140
2016	154	140
2018	154	140
2019	136	140
2020	166	146
2021	134	146
2023	147	146
2024	154	146
2025	141	146
2026	134	146

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

First to last qualifying date each year at Tombstone
Year	First date	Last date
1898	1898-04-23	1898-10-13
1901	1901-04-24	1901-10-02
1905	1905-05-16	1905-09-15
1906	1906-05-09	1906-09-23
1907	1907-03-19	1907-09-26
1908	1908-03-14	1908-10-30
1909	1909-04-15	1909-11-05
1910	1910-03-04	1910-10-08
1911	1911-04-19	1911-10-03
1912	1912-04-23	1912-09-28
1913	1913-03-31	1913-10-14
1914	1914-04-14	1914-10-02
1915	1915-05-10	1915-11-05
1916	1916-03-10	1916-11-04
1919	1919-04-17	1919-09-21
1920	1920-05-06	1920-10-09
1921	1921-04-18	1921-10-21
1922	1922-04-20	1922-10-11
1923	1923-05-02	1923-09-04
1924	1924-05-01	1924-11-03
1925	1925-03-05	1925-10-09
1926	1926-04-24	1926-09-24
1927	1927-04-24	1927-10-15
1928	1928-04-16	1928-10-09
1929	1929-05-03	1929-10-12
1930	1930-04-06	1930-10-21
1931	1931-05-05	1931-11-01
1932	1932-04-02	1932-10-16
1933	1933-05-16	1933-10-25
1934	1934-03-30	1934-10-30
1935	1935-04-13	1935-10-11
1936	1936-04-13	1936-10-21
1937	1937-04-14	1937-10-28
1938	1938-04-18	1938-10-15
1939	1939-04-19	1939-09-23
1940	1940-04-19	1940-10-08
1941	1941-03-29	1941-10-09
1942	1942-04-04	1942-10-10
1943	1943-03-28	1943-10-26
1944	1944-04-07	1944-10-13
1945	1945-04-18	1945-11-05
1946	1946-04-12	1946-10-14
1948	1948-04-15	1948-10-14
1950	1950-03-30	1950-11-08
1954	1954-04-07	1954-10-23
1955	1955-05-05	1955-10-19
1956	1956-03-25	1956-10-23
1957	1957-02-08	1957-10-02
1958	1958-04-20	1958-10-19
1959	1959-04-02	1959-10-26
1960	1960-03-07	1960-10-08
1961	1961-04-04	1961-10-21
1962	1962-04-13	1962-10-24
1963	1963-01-25	1963-10-15
1964	1964-04-15	1964-10-29
1965	1965-04-19	1965-10-14
1966	1966-04-30	1966-10-21
1967	1967-05-08	1967-10-05
1970	1970-05-05	1970-09-25
1971	1971-03-26	1971-09-28
1972	1972-04-05	1972-10-16
1973	1973-05-09	1973-11-11
1974	1974-04-08	1974-10-10
1975	1975-05-10	1975-10-11
1976	1976-05-11	1976-09-28
1977	1977-04-26	1977-10-02
1978	1978-04-24	1978-10-17
1979	1979-05-05	1979-10-25
1980	1980-04-19	1980-10-09
1981	1981-04-11	1981-09-30
1982	1982-04-28	1982-10-06
1983	1983-05-07	1983-09-29
1984	1984-05-07	1984-09-28
1985	1985-04-12	1985-10-06
1986	1986-04-20	1986-09-22
1987	1987-04-13	1987-10-28
1988	1988-03-25	1988-10-08
1989	1989-03-08	1989-10-14
1990	1990-04-10	1990-10-06
1991	1991-04-06	1991-10-19
1992	1992-04-12	1992-10-18
1993	1993-04-20	1993-10-13
1994	1994-04-16	1994-09-30
1995	1995-04-27	1995-10-29
1996	1996-04-09	1996-11-19
1997	1997-03-20	1997-10-10
1998	1998-04-22	1998-10-14
1999	1999-03-21	1999-11-01
2000	2000-04-07	2000-10-07
2001	2001-04-16	2001-11-04
2002	2002-04-02	2002-10-16
2003	2003-04-27	2003-10-25
2004	2004-05-05	2004-10-23
2005	2005-04-16	2005-10-07
2007	2007-05-11	2007-10-21
2008	2008-04-15	2008-10-28
2010	2010-04-16	2010-10-30
2011	2011-04-02	2011-10-20
2012	2012-04-01	2012-10-20
2013	2013-03-16	2013-10-08
2014	2014-02-16	2014-10-27
2015	2015-03-29	2015-10-16
2016	2016-03-22	2016-11-01
2018	2018-03-23	2018-10-07
2019	2019-04-09	2019-10-18
2020	2020-04-25	2020-11-19
2021	2021-04-04	2021-10-23
2023	2023-04-11	2023-10-24
2024	2024-04-19	2024-10-29
2025	2025-03-26	2025-10-23
2026	2026-03-19	2026-10-10

Every Fixed Threshold

Fixed thresholds at Tombstone
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	111	172	1989	134
35 C (95 F): Days	111	96	2020	56
40 C (104 F): Days	69	12	1990	5
90 F (32.2 C): Days	111	136	2020	107
100 F (37.8 C): Days	107	42	2020	15
110 F (43.3 C): Days	4	2	2016	2
0 C (32 F): Ice days (max	5	1	1913	1
0 C (32 F): Frost days (min	108	79	1964	4
-10 C (14 F): Days with min	16	4	1963	1
20 C (68 F): Tropical nights (min	108	67	2020	70
25 C (77 F): Days with min	19	4	2018	1
10 mm (0.39 in): Days with 10 mm or more rain	113	23	1905	14
25 mm (0.98 in): Days with 25 mm or more rain	101	6	1931	3
50 mm (1.97 in): Days with 50 mm or more rain	24	2	1910	1
10 cm (3.9 in): Days with 10 cm or more snowfall	17	2	1905	1
25 cm (9.8 in): Days with 25 cm or more snowfall	1	1	1916	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1898.

Download the Data

Data for Tombstone 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 2026-10-17. Last revised 17 October 2026 (2026-10-17).

Tombstone Threshold Days by Year (USC00028619)

Key Facts for Tombstone Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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