Mesa Threshold Days by Year (USC00025467)

13 fixed thresholds counted per year at Mesa (USC00025467): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Mesa Thresholds

Mesa: days with 10 mm (0.39 in) or more of precipitation in 116 years, most in 1905 with 19.
Mesa: days with a maximum temperature at or above 30 C (86 F) in 87 years, most in 1910 with 213.
Mesa: days with a maximum temperature at or above 35 C (95 F) in 87 years, most in 1910 with 158.
Mesa: days with a maximum temperature at or above 40 C (104 F) in 87 years, most in 1953 with 86.
13 fixed thresholds have at least one qualifying day at Mesa.

Days at or above 30 C (86 F)

87 years with a qualifying day

Days per year at Mesa with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 213 in 1910.

Days at or above 30 C (86 F) per year at Mesa
Year	Days	Decade average
1897	177	172.3
1898	179	172.3
1899	161	172.3
1900	180	188.5
1901	187	188.5
1902	189	188.5
1903	188	188.5
1904	208	188.5
1905	173	188.5
1906	204	188.5
1907	177	188.5
1908	179	188.5
1909	200	188.5
1910	213	178.7
1911	174	178.7
1915	169	178.7
1916	195	178.7
1917	174	178.7
1918	168	178.7
1919	158	178.7
1920	147	163.4
1921	180	163.4
1922	171	163.4
1923	157	163.4
1924	159	163.4
1925	163	163.4
1926	163	163.4
1927	150	163.4
1928	173	163.4
1929	171	163.4
1930	179	179.8
1932	170	179.8
1933	162	179.8
1934	196	179.8
1935	152	179.8
1936	194	179.8
1937	185	179.8
1938	179	179.8
1939	201	179.8
1940	195	180.4
1941	155	180.4
1942	169	180.4
1943	194	180.4
1944	175	180.4
1945	187	180.4
1946	175	180.4
1947	180	180.4
1948	184	180.4
1949	190	180.4
1950	205	186.6
1951	176	186.6
1952	198	186.6
1953	192	186.6
1954	206	186.6
1955	185	186.6
1956	187	186.6
1957	154	186.6
1958	177	186.6
1959	186	186.6
1960	181	183
1961	181	183
1962	191	183
1963	189	183
1964	180	183
1965	180	183
1966	186	183
1967	182	183
1968	186	183
1969	174	183
1970	163	179.7
1971	174	179.7
1972	200	179.7
1973	181	179.7
1974	186	179.7
1975	170	179.7
1976	175	179.7
1977	182	179.7
1978	183	179.7
1979	183	179.7
1980	180	180.1
1981	196	180.1
1982	174	180.1
1983	167	180.1
1984	174	180.1
1985	182	180.1
1986	167	180.1
1987	201	180.1

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

First to last qualifying date each year at Mesa
Year	First date	Last date
1897	1897-04-05	1897-10-12
1898	1898-04-08	1898-11-07
1899	1899-03-06	1899-10-20
1900	1900-03-09	1900-11-10
1901	1901-03-01	1901-11-28
1902	1902-04-05	1902-10-28
1903	1903-03-12	1903-11-27
1904	1904-02-23	1904-11-24
1905	1905-04-04	1905-10-31
1906	1906-02-26	1906-11-15
1907	1907-03-17	1907-11-06
1908	1908-03-15	1908-10-15
1909	1909-04-02	1909-11-08
1910	1910-03-01	1910-11-24
1911	1911-03-24	1911-10-25
1915	1915-04-02	1915-10-31
1916	1916-03-09	1916-11-30
1917	1917-03-28	1917-11-05
1918	1918-04-01	1918-11-04
1919	1919-03-27	1919-10-19
1920	1920-04-07	1920-10-10
1921	1921-02-14	1921-11-05
1922	1922-04-01	1922-10-25
1923	1923-04-11	1923-10-23
1924	1924-04-19	1924-11-01
1925	1925-03-22	1925-10-10
1926	1926-03-15	1926-11-05
1927	1927-04-07	1927-10-25
1928	1928-03-21	1928-10-30
1929	1929-04-03	1929-10-23
1930	1930-02-18	1930-11-05
1932	1932-04-02	1932-11-06
1933	1933-04-03	1933-11-15
1934	1934-03-05	1934-11-15
1935	1935-04-12	1935-10-26
1936	1936-03-10	1936-11-16
1937	1937-04-10	1937-11-06
1938	1938-04-11	1938-10-30
1939	1939-03-15	1939-11-07
1940	1940-03-22	1940-11-02
1941	1941-04-24	1941-10-17
1942	1942-03-30	1942-10-26
1943	1943-02-20	1943-10-28
1944	1944-04-04	1944-11-04
1945	1945-04-09	1945-11-05
1946	1946-03-10	1946-10-26
1947	1947-03-26	1947-11-02
1948	1948-04-10	1948-10-27
1949	1949-04-11	1949-12-01
1950	1950-03-23	1950-11-27
1951	1951-02-11	1951-10-26
1952	1952-04-02	1952-11-07
1953	1953-03-25	1953-12-01
1954	1954-02-05	1954-11-12
1955	1955-03-09	1955-11-05
1956	1956-03-19	1956-11-11
1957	1957-02-14	1957-10-11
1958	1958-04-16	1958-11-11
1959	1959-04-02	1959-10-29
1960	1960-03-21	1960-11-04
1961	1961-03-23	1961-10-27
1962	1962-03-27	1962-11-13
1963	1963-02-05	1963-11-13
1964	1964-03-29	1964-10-31
1965	1965-04-01	1965-11-08
1966	1966-03-15	1966-11-15
1967	1967-03-17	1967-11-19
1968	1968-03-29	1968-11-01
1969	1969-03-29	1969-10-18
1970	1970-04-03	1970-11-01
1971	1971-01-20	1971-11-12
1972	1972-02-28	1972-10-17
1973	1973-04-12	1973-11-10
1974	1974-03-16	1974-10-26
1975	1975-04-22	1975-11-06
1976	1976-03-23	1976-11-08
1977	1977-02-20	1977-11-04
1978	1978-03-27	1978-11-09
1979	1979-04-08	1979-10-29
1980	1980-04-09	1980-11-12
1981	1981-02-20	1981-11-07
1982	1982-02-23	1982-10-26
1983	1983-04-01	1983-10-26
1984	1984-03-15	1984-11-06
1985	1985-04-03	1985-11-05
1986	1986-02-25	1986-11-12
1987	1987-04-01	1987-11-04

Every Fixed Threshold

Fixed thresholds at Mesa
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	87	213	1910	201
35 C (95 F): Days	87	158	1910	153
40 C (104 F): Days	87	86	1953	68
45 C (113 F): Days	40	14	1985	1
90 F (32.2 C): Days	87	186	1910	179
100 F (37.8 C): Days	87	114	1905	110
110 F (43.3 C): Days	82	27	1985	7
0 C (32 F): Frost days (min	85	59	1922	9
20 C (68 F): Tropical nights (min	85	131	1987	131
25 C (77 F): Days with min	84	54	1977	27
10 mm (0.39 in): Days with 10 mm or more rain	116	19	1905	6
25 mm (0.98 in): Days with 25 mm or more rain	80	5	1905	1
50 mm (1.97 in): Days with 50 mm or more rain	13	2	1911	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1897.

Download the Data

Data for Mesa 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).

Mesa Threshold Days by Year (USC00025467)

Key Facts for Mesa Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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