Matias Romero (Smn) Threshold Days by Year (MXN00020068)

12 fixed thresholds counted per year at Matias Romero (Smn) (MXN00020068): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Matias Romero (Smn) Thresholds

Matias Romero (Smn): days with a maximum temperature at or above 30 C (86 F) in 57 years, most in 1993 with 345.
Matias Romero (Smn): days with a maximum temperature at or above 90 F (32.2 C) in 57 years, most in 1993 with 274.
Matias Romero (Smn): nights with a minimum temperature at or above 20 C (68 F) in 57 years, most in 1993 with 336.
Matias Romero (Smn): days with 10 mm (0.39 in) or more of precipitation in 57 years, most in 1975 with 59.
12 fixed thresholds have at least one qualifying day at Matias Romero (Smn).

Days at or above 30 C (86 F)

57 years with a qualifying day

Days per year at Matias Romero (Smn) with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 345 in 1993.

Days at or above 30 C (86 F) per year at Matias Romero (Smn)
Year	Days	Decade average
1928	82	90
1929	98	90
1930	129	129
1941	109	205
1942	87	205
1943	176	205
1944	244	205
1945	210	205
1946	186	205
1947	228	205
1948	299	205
1949	306	205
1950	247	248.9
1951	228	248.9
1952	259	248.9
1953	311	248.9
1954	289	248.9
1955	216	248.9
1956	223	248.9
1957	265	248.9
1958	235	248.9
1959	216	248.9
1960	245	182.6
1961	178	182.6
1962	145	182.6
1963	183	182.6
1964	197	182.6
1965	178	182.6
1966	167	182.6
1967	176	182.6
1968	184	182.6
1969	173	182.6
1970	137	211.4
1971	178	211.4
1972	213	211.4
1973	248	211.4
1974	175	211.4
1975	225	211.4
1976	214	211.4
1977	250	211.4
1978	238	211.4
1979	236	211.4
1980	240	256.6
1981	245	256.6
1982	267	256.6
1983	255	256.6
1984	231	256.6
1985	284	256.6
1986	254	256.6
1987	256	256.6
1988	257	256.6
1989	277	256.6
1990	286	313
1991	295	313
1992	297	313
1993	345	313
1994	342	313

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

First to last qualifying date each year at Matias Romero (Smn)
Year	First date	Last date
1928	1928-02-13	1928-08-18
1929	1929-02-04	1929-12-10
1930	1930-01-06	1930-10-27
1941	1941-02-24	1941-10-07
1942	1942-04-19	1942-12-12
1943	1943-02-23	1943-12-27
1944	1944-01-01	1944-12-26
1945	1945-02-03	1945-12-30
1946	1946-01-01	1946-12-29
1947	1947-01-12	1947-12-11
1948	1948-02-05	1948-12-30
1949	1949-01-02	1949-12-26
1950	1950-01-04	1950-11-28
1951	1951-01-12	1951-12-31
1952	1952-01-01	1952-12-31
1953	1953-01-01	1953-12-31
1954	1954-01-02	1954-12-24
1955	1955-01-06	1955-12-24
1956	1956-01-04	1956-12-24
1957	1957-01-07	1957-12-07
1958	1958-01-07	1958-12-14
1959	1959-01-15	1959-12-29
1960	1960-01-14	1960-12-25
1961	1961-01-04	1961-12-12
1962	1962-02-05	1962-12-27
1963	1963-01-05	1963-12-14
1964	1964-01-09	1964-12-26
1965	1965-01-16	1965-12-26
1966	1966-01-19	1966-12-07
1967	1967-01-02	1967-12-31
1968	1968-01-01	1968-12-25
1969	1969-01-03	1969-12-24
1970	1970-01-17	1970-12-28
1971	1971-02-03	1971-12-21
1972	1972-01-03	1972-12-31
1973	1973-01-01	1973-12-31
1974	1974-01-09	1974-12-31
1975	1975-01-01	1975-12-01
1976	1976-01-01	1976-11-13
1977	1977-01-01	1977-12-20
1978	1978-01-07	1978-12-31
1979	1979-01-01	1979-12-05
1980	1980-01-11	1980-12-15
1981	1981-01-26	1981-12-31
1982	1982-01-01	1982-12-31
1983	1983-01-20	1983-12-11
1984	1984-02-13	1984-12-15
1985	1985-01-01	1985-12-30
1986	1986-01-01	1986-12-24
1987	1987-01-16	1987-12-26
1988	1988-01-16	1988-12-31
1989	1989-01-01	1989-12-31
1990	1990-01-01	1990-12-22
1991	1991-01-05	1991-12-31
1992	1992-01-01	1992-12-26
1993	1993-01-01	1993-12-31
1994	1994-01-01	1994-12-31

Every Fixed Threshold

Fixed thresholds at Matias Romero (Smn)
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	57	345	1993	342
35 C (95 F): Days	56	98	1953	60
40 C (104 F): Days	6	9	1930	2
90 F (32.2 C): Days	57	274	1993	251
100 F (37.8 C): Days	35	31	1990	14
20 C (68 F): Tropical nights (min	57	336	1993	333
25 C (77 F): Days with min	25	145	1988	17
10 mm (0.39 in): Days with 10 mm or more rain	57	59	1975	38
25 mm (0.98 in): Days with 25 mm or more rain	57	34	1981	18
50 mm (1.97 in): Days with 50 mm or more rain	55	18	1979	2
100 mm (3.94 in): Days with 100 mm or more rain	23	4	1955	1
200 mm (7.87 in): Days with 200 mm or more rain	2	1	1955	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1928.

Download the Data

Data for Matias Romero (Smn) 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).

Matias Romero (Smn) Threshold Days by Year (MXN00020068)

Key Facts for Matias Romero (Smn) Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

Related