Coalcoman (Smn) Threshold Days by Year (MXN00016154)

12 fixed thresholds counted per year at Coalcoman (Smn) (MXN00016154): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Coalcoman (Smn) Thresholds

Coalcoman (Smn): days with a maximum temperature at or above 30 C (86 F) in 45 years, most in 1953 with 355.
Coalcoman (Smn): days with a maximum temperature at or above 90 F (32.2 C) in 45 years, most in 1953 with 290.
Coalcoman (Smn): nights with a minimum temperature at or above 20 C (68 F) in 45 years, most in 1972 with 129.
Coalcoman (Smn): days with a maximum temperature at or above 35 C (95 F) in 44 years, most in 1988 with 173.
12 fixed thresholds have at least one qualifying day at Coalcoman (Smn).

Days at or above 30 C (86 F)

45 years with a qualifying day

Days per year at Coalcoman (Smn) with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 355 in 1953.

Days at or above 30 C (86 F) per year at Coalcoman (Smn)
Year	Days	Decade average
1937	304	259.3
1938	296	259.3
1939	178	259.3
1940	296	314
1941	307	314
1942	300	314
1943	311	314
1946	326	314
1949	344	314
1950	328	328.2
1951	311	328.2
1952	345	328.2
1953	355	328.2
1954	337	328.2
1955	330	328.2
1956	331	328.2
1957	354	328.2
1958	313	328.2
1959	278	328.2
1960	320	306.7
1961	337	306.7
1962	287	306.7
1964	332	306.7
1965	293	306.7
1966	289	306.7
1967	295	306.7
1968	323	306.7
1969	284	306.7
1970	295	289
1971	269	289
1972	299	289
1973	288	289
1974	309	289
1977	257	289
1978	271	289
1979	324	289
1980	294	272.4
1982	263	272.4
1983	225	272.4
1984	224	272.4
1985	258	272.4
1986	287	272.4
1987	314	272.4
1988	314	272.4
2006	184	184

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

First to last qualifying date each year at Coalcoman (Smn)
Year	First date	Last date
1937	1937-01-01	1937-12-29
1938	1938-01-01	1938-12-31
1939	1939-01-05	1939-09-30
1940	1940-01-26	1940-12-31
1941	1941-01-01	1941-12-31
1942	1942-01-01	1942-12-31
1943	1943-01-02	1943-12-31
1946	1946-01-01	1946-12-31
1949	1949-01-01	1949-12-31
1950	1950-01-01	1950-11-30
1951	1951-01-23	1951-12-31
1952	1952-01-01	1952-12-28
1953	1953-01-01	1953-12-31
1954	1954-01-01	1954-12-31
1955	1955-01-01	1955-12-31
1956	1956-01-01	1956-12-31
1957	1957-01-01	1957-12-31
1958	1958-01-01	1958-12-30
1959	1959-01-12	1959-12-31
1960	1960-01-01	1960-12-31
1961	1961-01-01	1961-12-31
1962	1962-01-01	1962-12-26
1964	1964-01-01	1964-12-31
1965	1965-01-01	1965-12-02
1966	1966-01-01	1966-12-31
1967	1967-01-01	1967-12-07
1968	1968-01-03	1968-12-31
1969	1969-01-01	1969-12-31
1970	1970-01-01	1970-12-31
1971	1971-01-01	1971-12-31
1972	1972-01-01	1972-12-31
1973	1973-01-01	1973-12-31
1974	1974-01-01	1974-12-31
1977	1977-01-02	1977-12-31
1978	1978-01-01	1978-12-31
1979	1979-01-01	1979-12-30
1980	1980-01-01	1980-12-31
1982	1982-01-02	1982-12-27
1983	1983-01-05	1983-12-30
1984	1984-01-01	1984-12-31
1985	1985-01-01	1985-12-31
1986	1986-01-01	1986-12-31
1987	1987-01-07	1987-12-31
1988	1988-01-01	1988-11-29
2006	2006-02-06	2006-09-29

Every Fixed Threshold

Fixed thresholds at Coalcoman (Smn)
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	45	355	1953	184
35 C (95 F): Days	44	173	1988	173
40 C (104 F): Days	8	9	1942	4
90 F (32.2 C): Days	45	290	1953	30
100 F (37.8 C): Days	41	53	1953	40
0 C (32 F): Frost days (min	1	1	1938	1
20 C (68 F): Tropical nights (min	45	129	1972	8
25 C (77 F): Days with min	1	1	1965	1
10 mm (0.39 in): Days with 10 mm or more rain	44	78	1958	29
25 mm (0.98 in): Days with 25 mm or more rain	44	29	1958	3
50 mm (1.97 in): Days with 50 mm or more rain	42	11	1958	1
100 mm (3.94 in): Days with 100 mm or more rain	2	1	1966	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1937.

Download the Data

Data for Coalcoman (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).

Coalcoman (Smn) Threshold Days by Year (MXN00016154)

Key Facts for Coalcoman (Smn) Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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