Sonora Threshold Days by Year

16 fixed thresholds counted per year at Sonora (USC00418449): 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 65 years, most in 2004 with 29.
Sonora: days with 25 mm (0.98 in) or more of precipitation in 65 years, most in 2004 with 15.
Sonora: nights with a minimum temperature at or below 0 C (32 F) in 59 years, most in 2008 with 86.
Sonora: nights with a minimum temperature at or above 20 C (68 F) in 59 years, most in 1998 with 103.
16 fixed thresholds have at least one qualifying day at Sonora.

Days at or above 30 C (86 F)

58 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 190 in 2025.

Days at or above 30 C (86 F) per year at Sonora
Year	Days	Decade average
1903	102	131.3
1904	152	131.3
1905	133	131.3
1906	105	131.3
1908	145	131.3
1909	151	131.3
1912	127	124.7
1914	141	124.7
1915	106	124.7
1950	162	142
1952	147	142
1953	149	142
1954	150	142
1955	157	142
1957	107	142
1958	122	142
1960	157	145.6
1961	146	145.6
1962	157	145.6
1963	165	145.6
1964	136	145.6
1965	137	145.6
1966	115	145.6
1967	153	145.6
1969	144	145.6
1970	149	149.1
1971	128	149.1
1972	162	149.1
1973	148	149.1
1974	152	149.1
1975	155	149.1
1976	125	149.1
1977	153	149.1
1978	154	149.1
1979	165	149.1
1980	158	157.6
1982	166	157.6
1983	157	157.6
1984	153	157.6
1986	154	157.6
1996	159	144
1997	128	144
1998	148	144
1999	141	144
2000	163	134.6
2001	133	134.6
2002	142	134.6
2003	130	134.6
2004	104	134.6
2005	132	134.6
2006	159	134.6
2007	120	134.6
2008	142	134.6
2009	121	134.6
2012	146	138.5
2013	131	138.5
2025	190	149
2026	108	149

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
1903	1903-03-31	1903-11-14
1904	1904-02-23	1904-10-13
1905	1905-05-03	1905-10-15
1906	1906-04-12	1906-09-24
1908	1908-03-14	1908-11-10
1909	1909-03-02	1909-10-31
1912	1912-03-20	1912-10-19
1914	1914-03-29	1914-10-19
1915	1915-05-15	1915-09-29
1950	1950-03-18	1950-11-19
1952	1952-03-20	1952-10-17
1953	1953-03-20	1953-10-11
1954	1954-02-25	1954-10-13
1955	1955-03-04	1955-12-25
1957	1957-02-09	1957-10-04
1958	1958-04-04	1958-11-09
1960	1960-03-31	1960-10-26
1961	1961-03-28	1961-10-13
1962	1962-04-09	1962-10-16
1963	1963-02-08	1963-11-06
1964	1964-03-08	1964-10-17
1965	1965-04-03	1965-11-26
1966	1966-03-22	1966-10-13
1967	1967-03-02	1967-10-16
1969	1969-01-09	1969-11-11
1970	1970-04-11	1970-10-26
1971	1971-03-13	1971-09-27
1972	1972-02-24	1972-10-19
1973	1973-04-19	1973-10-08
1974	1974-03-02	1974-10-09
1975	1975-01-26	1975-10-23
1976	1976-03-02	1976-10-04
1977	1977-03-13	1977-10-31
1978	1978-03-22	1978-10-06
1979	1979-03-29	1979-10-29
1980	1980-04-02	1980-11-10
1982	1982-03-11	1982-11-01
1983	1983-03-31	1983-10-23
1984	1984-03-27	1984-10-18
1986	1986-02-17	1986-10-03
1996	1996-02-20	1996-11-20
1997	1997-03-21	1997-10-31
1998	1998-03-24	1998-10-05
1999	1999-04-08	1999-10-22
2000	2000-01-19	2000-10-05
2001	2001-04-15	2001-10-24
2002	2002-03-13	2002-10-12
2003	2003-04-05	2003-10-23
2004	2004-04-21	2004-10-21
2005	2005-04-05	2005-10-20
2006	2006-03-01	2006-11-09
2007	2007-03-15	2007-11-14
2008	2008-02-25	2008-10-11
2009	2009-02-26	2009-10-15
2012	2012-03-25	2012-10-22
2013	2013-03-17	2013-10-14
2025	2025-02-07	2025-11-18
2026	2026-02-26	2026-08-31

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	58	190	2025	108
35 C (95 F): Days	58	95	1984	42
40 C (104 F): Days	28	16	1980	2
90 F (32.2 C): Days	58	141	1984	87
100 F (37.8 C): Days	54	52	1980	7
0 C (32 F): Ice days (max	29	6	1905	2
0 C (32 F): Frost days (min	59	86	2008	37
-10 C (14 F): Days with min	44	9	1996	5
20 C (68 F): Tropical nights (min	59	103	1998	53
25 C (77 F): Days with min	17	7	1912	1
10 mm (0.39 in): Days with 10 mm or more rain	65	29	2004	17
25 mm (0.98 in): Days with 25 mm or more rain	65	15	2004	9
50 mm (1.97 in): Days with 50 mm or more rain	50	5	1914	2
100 mm (3.94 in): Days with 100 mm or more rain	11	1	1914	1
200 mm (7.87 in): Days with 200 mm or more rain	1	1	1976	1
10 cm (3.9 in): Days with 10 cm or more snowfall	5	3	1915	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1903.

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 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Sonora Threshold Days by Year

Key Facts for Sonora Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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