Sonora Threshold Days by Year (USC00048353)

16 fixed thresholds counted per year at Sonora (USC00048353): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Sonora Thresholds

Sonora: days with 10 mm (0.39 in) or more of precipitation in 87 years, most in 1941 with 40.
Sonora: days with 25 mm (0.98 in) or more of precipitation in 87 years, most in 2010 with 20.
Sonora: days with a maximum temperature at or above 30 C (86 F) in 77 years, most in 1924 with 126.
Sonora: days with a maximum temperature at or above 35 C (95 F) in 77 years, most in 1934 with 72.
16 fixed thresholds have at least one qualifying day at Sonora.

Days at or above 30 C (86 F)

77 years with a qualifying day

Days per year at Sonora with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 126 in 1924.

Days at or above 30 C (86 F) per year at Sonora
Year	Days	Decade average
1909	95	95
1910	82	75.6
1911	83	75.6
1912	72	75.6
1913	74	75.6
1914	71	75.6
1916	60	75.6
1918	87	75.6
1921	81	100.9
1922	90	100.9
1923	80	100.9
1924	126	100.9
1925	78	100.9
1926	120	100.9
1927	104	100.9
1928	115	100.9
1929	114	100.9
1930	96	108.9
1931	106	108.9
1932	108	108.9
1933	107	108.9
1934	115	108.9
1936	111	108.9
1937	104	108.9
1938	114	108.9
1939	119	108.9
1940	114	104
1941	79	104
1942	118	104
1943	105	104
1956	108	106
1957	104	106
1958	107	106
1959	105	106
1960	121	100.8
1961	104	100.8
1962	111	100.8
1963	90	100.8
1964	77	100.8
1965	99	100.8
1966	110	100.8
1967	113	100.8
1968	79	100.8
1969	104	100.8
1970	114	102.9
1971	101	102.9
1972	99	102.9
1973	106	102.9
1974	114	102.9
1975	100	102.9
1976	86	102.9
1992	124	103.3
1993	103	103.3
1994	94	103.3
1999	92	103.3
2000	93	96.5
2001	105	96.5
2002	95	96.5
2003	110	96.5
2004	101	96.5
2005	75	96.5
2006	90	96.5
2009	103	96.5
2010	83	96.7
2011	85	96.7
2012	107	96.7
2013	99	96.7
2014	122	96.7
2015	99	96.7
2016	102	96.7
2017	96	96.7
2018	92	96.7
2019	82	96.7
2020	122	96.3
2021	110	96.3
2025	77	96.3
2026	76	96.3

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

First to last qualifying date each year at Sonora
Year	First date	Last date
1909	1909-05-31	1909-09-23
1910	1910-04-23	1910-10-08
1911	1911-05-20	1911-09-20
1912	1912-05-14	1912-09-26
1913	1913-05-23	1913-09-19
1914	1914-05-20	1914-09-11
1916	1916-06-05	1916-09-29
1918	1918-04-20	1918-09-05
1921	1921-06-06	1921-09-29
1922	1922-05-13	1922-09-26
1923	1923-06-09	1923-09-17
1924	1924-05-01	1924-09-30
1925	1925-06-18	1925-09-24
1926	1926-04-25	1926-10-16
1927	1927-04-25	1927-10-21
1928	1928-05-05	1928-10-09
1929	1929-05-11	1929-10-22
1930	1930-05-26	1930-10-06
1931	1931-04-20	1931-10-01
1932	1932-05-11	1932-10-05
1933	1933-05-27	1933-10-07
1934	1934-04-19	1934-10-12
1936	1936-05-08	1936-10-10
1937	1937-05-13	1937-09-27
1938	1938-05-12	1938-09-23
1939	1939-04-20	1939-10-31
1940	1940-04-12	1940-10-19
1941	1941-05-09	1941-10-10
1942	1942-05-19	1942-10-22
1943	1943-05-21	1943-10-16
1956	1956-05-17	1956-11-10
1957	1957-05-06	1957-09-27
1958	1958-05-05	1958-10-18
1959	1959-05-08	1959-10-26
1960	1960-05-11	1960-10-19
1961	1961-06-11	1961-10-19
1962	1962-04-13	1962-10-02
1963	1963-05-18	1963-10-05
1964	1964-05-19	1964-10-23
1965	1965-05-17	1965-10-31
1966	1966-04-02	1966-11-03
1967	1967-05-17	1967-10-21
1968	1968-04-29	1968-10-28
1969	1969-05-11	1969-10-02
1970	1970-05-16	1970-10-05
1971	1971-06-06	1971-10-14
1972	1972-05-04	1972-10-07
1973	1973-05-11	1973-10-01
1974	1974-05-08	1974-10-19
1975	1975-05-25	1975-10-06
1976	1976-05-12	1976-10-13
1992	1992-04-29	1992-10-14
1993	1993-05-10	1993-10-04
1994	1994-04-16	1994-10-12
1999	1999-05-23	1999-10-14
2000	2000-05-21	2000-10-08
2001	2001-05-08	2001-10-16
2002	2002-05-30	2002-10-10
2003	2003-05-22	2003-10-29
2004	2004-04-27	2004-10-15
2005	2005-05-26	2005-10-15
2006	2006-05-12	2006-09-30
2009	2009-04-21	2009-09-29
2010	2010-06-06	2010-10-16
2011	2011-05-06	2011-09-30
2012	2012-04-23	2012-10-19
2013	2013-04-29	2013-09-20
2014	2014-05-02	2014-10-14
2015	2015-05-02	2015-10-15
2016	2016-05-13	2016-10-10
2017	2017-05-04	2017-10-26
2018	2018-05-29	2018-09-28
2019	2019-04-26	2019-10-09
2020	2020-05-09	2020-10-20
2021	2021-05-01	2021-10-05
2025	2025-05-10	2025-10-08
2026	2026-03-19	2026-10-09

Every Fixed Threshold

Fixed thresholds at Sonora
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	77	126	1924	76
35 C (95 F): Days	77	72	1934	15
40 C (104 F): Days	50	18	1959	6
45 C (113 F): Days	2	1	1961	1
90 F (32.2 C): Days	77	104	1924	53
100 F (37.8 C): Days	70	40	1961	1
110 F (43.3 C): Days	5	2	1960	2
0 C (32 F): Frost days (min	69	103	2011	28
-10 C (14 F): Days with min	2	6	1972	6
20 C (68 F): Tropical nights (min	52	22	1925	14
25 C (77 F): Days with min	3	1	1921	1
10 mm (0.39 in): Days with 10 mm or more rain	87	40	1941	13
25 mm (0.98 in): Days with 25 mm or more rain	87	20	2010	7
50 mm (1.97 in): Days with 50 mm or more rain	63	6	1922	1
100 mm (3.94 in): Days with 100 mm or more rain	6	1	1909	1
10 cm (3.9 in): Days with 10 cm or more snowfall	12	4	1933	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 Sonora 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).

Sonora Threshold Days by Year (USC00048353)

Key Facts for Sonora Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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