Los Herreras Threshold Days by Year (MXN00019041)

17 fixed thresholds counted per year at Los Herreras (MXN00019041): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Los Herreras Thresholds

Los Herreras: days with 10 mm (0.39 in) or more of precipitation in 43 years, most in 2010 with 27.
Los Herreras: days with 25 mm (0.98 in) or more of precipitation in 42 years, most in 2010 with 14.
Los Herreras: days with a maximum temperature at or above 30 C (86 F) in 41 years, most in 2011 with 267.
Los Herreras: days with a maximum temperature at or above 35 C (95 F) in 41 years, most in 2011 with 182.
17 fixed thresholds have at least one qualifying day at Los Herreras.

Days at or above 30 C (86 F)

41 years with a qualifying day

Days per year at Los Herreras with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 267 in 2011.

Days at or above 30 C (86 F) per year at Los Herreras
Year	Days	Decade average
1943	202	216.3
1944	195	216.3
1945	227	216.3
1946	218	216.3
1947	226	216.3
1948	220	216.3
1949	226	216.3
1951	224	213.1
1952	216	213.1
1953	227	213.1
1954	225	213.1
1955	218	213.1
1956	229	213.1
1957	215	213.1
1958	176	213.1
1959	188	213.1
1960	234	213.4
1961	223	213.4
1962	225	213.4
1963	215	213.4
1964	210	213.4
1965	199	213.4
1966	188	213.4
1971	183	191
1972	194	191
1973	193	191
1974	200	191
1975	196	191
1976	167	191
1977	194	191
1978	181	191
1979	211	191
1980	221	225.3
1981	207	225.3
1982	232	225.3
1985	241	225.3
1998	208	208
2008	231	238.5
2009	246	238.5
2010	231	249
2011	267	249

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

First to last qualifying date each year at Los Herreras
Year	First date	Last date
1943	1943-01-22	1943-11-11
1944	1944-01-25	1944-11-14
1945	1945-02-13	1945-12-30
1946	1946-01-04	1946-12-28
1947	1947-01-13	1947-12-31
1948	1948-01-08	1948-12-28
1949	1949-01-03	1949-12-21
1951	1951-01-17	1951-12-31
1952	1952-01-01	1952-12-08
1953	1953-01-06	1953-12-05
1954	1954-01-20	1954-12-27
1955	1955-02-18	1955-12-25
1956	1956-01-15	1956-12-08
1957	1957-01-08	1957-11-17
1958	1958-03-22	1958-12-04
1959	1959-02-18	1959-11-14
1960	1960-01-12	1960-12-06
1961	1961-01-13	1961-11-21
1962	1962-02-04	1962-11-17
1963	1963-01-10	1963-11-20
1964	1964-03-03	1964-12-30
1965	1965-01-08	1965-11-26
1966	1966-02-09	1966-12-21
1971	1971-01-13	1971-12-19
1972	1972-02-21	1972-12-05
1973	1973-01-20	1973-12-30
1974	1974-01-10	1974-12-23
1975	1975-01-09	1975-12-05
1976	1976-01-01	1976-11-11
1977	1977-02-18	1977-12-16
1978	1978-02-25	1978-12-20
1979	1979-02-14	1979-11-27
1980	1980-01-14	1980-12-08
1981	1981-02-10	1981-12-27
1982	1982-01-02	1982-12-24
1985	1985-02-21	1985-12-31
1998	1998-02-09	1998-12-21
2008	2008-01-06	2008-12-26
2009	2009-01-03	2009-12-08
2010	2010-01-20	2010-12-31
2011	2011-01-08	2011-12-30

Every Fixed Threshold

Fixed thresholds at Los Herreras
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	41	267	2011	267
35 C (95 F): Days	41	182	2011	182
40 C (104 F): Days	39	92	1960	50
45 C (113 F): Days	6	29	1960	3
90 F (32.2 C): Days	41	223	2011	223
100 F (37.8 C): Days	40	130	1960	130
110 F (43.3 C): Days	15	41	1960	10
0 C (32 F): Ice days (max	2	2	1951	1
0 C (32 F): Frost days (min	39	25	1985	6
-10 C (14 F): Days with min	1	2	1962	2
20 C (68 F): Tropical nights (min	41	188	1946	185
25 C (77 F): Days with min	39	91	2009	90
10 mm (0.39 in): Days with 10 mm or more rain	43	27	2010	6
25 mm (0.98 in): Days with 25 mm or more rain	42	14	2010	1
50 mm (1.97 in): Days with 50 mm or more rain	34	5	1975	1
100 mm (3.94 in): Days with 100 mm or more rain	10	2	1957	1
200 mm (7.87 in): Days with 200 mm or more rain	3	1	1948	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1943.

Download the Data

Data for Los Herreras 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).

Los Herreras Threshold Days by Year (MXN00019041)

Key Facts for Los Herreras Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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