Tonala (Smn) Threshold Days by Year

13 fixed thresholds counted per year at Tonala (Smn) (MXN00007201): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Tonala (Smn) Thresholds

Tonala (Smn): days with 10 mm (0.39 in) or more of precipitation in 46 years, most in 1933 with 59.
Tonala (Smn): days with 25 mm (0.98 in) or more of precipitation in 46 years, most in 1974 with 32.
Tonala (Smn): days with 50 mm (1.97 in) or more of precipitation in 46 years, most in 1973 with 17.
Tonala (Smn): days with a maximum temperature at or above 30 C (86 F) in 43 years, most in 1976 with 364.
13 fixed thresholds have at least one qualifying day at Tonala (Smn).

Days at or above 30 C (86 F)

43 years with a qualifying day

Days per year at Tonala (Smn) with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 364 in 1976.

Days at or above 30 C (86 F) per year at Tonala (Smn)
Year	Days	Decade average
1923	363	347.3
1924	355	347.3
1929	324	347.3
1930	343	332.8
1931	342	332.8
1933	316	332.8
1934	351	332.8
1935	339	332.8
1936	332	332.8
1937	332	332.8
1938	307	332.8
1954	334	342.5
1959	351	342.5
1960	358	333.1
1961	359	333.1
1962	362	333.1
1963	329	333.1
1964	332	333.1
1965	327	333.1
1966	314	333.1
1967	326	333.1
1968	306	333.1
1969	318	333.1
1970	253	334.6
1971	363	334.6
1972	336	334.6
1973	287	334.6
1974	356	334.6
1975	363	334.6
1976	364	334.6
1977	364	334.6
1978	331	334.6
1979	329	334.6
1980	363	355.2
1981	362	355.2
1982	357	355.2
1983	363	355.2
1984	356	355.2
1985	359	355.2
1986	355	355.2
1987	364	355.2
1989	318	355.2
1996	351	351

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

First to last qualifying date each year at Tonala (Smn)
Year	First date	Last date
1923	1923-01-01	1923-12-31
1924	1924-01-01	1924-12-31
1929	1929-01-09	1929-12-31
1930	1930-01-01	1930-12-31
1931	1931-01-01	1931-12-31
1933	1933-01-01	1933-12-31
1934	1934-01-01	1934-12-31
1935	1935-01-01	1935-12-31
1936	1936-01-01	1936-12-31
1937	1937-01-01	1937-12-31
1938	1938-01-01	1938-12-31
1954	1954-01-01	1954-12-30
1959	1959-01-01	1959-12-30
1960	1960-01-01	1960-12-31
1961	1961-01-01	1961-12-31
1962	1962-01-01	1962-12-31
1963	1963-01-01	1963-12-30
1964	1964-01-03	1964-12-31
1965	1965-01-01	1965-12-31
1966	1966-01-01	1966-12-31
1967	1967-01-01	1967-12-31
1968	1968-01-01	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	1973-12-30
1974	1974-01-01	1974-12-31
1975	1975-01-01	1975-12-31
1976	1976-01-01	1976-12-31
1977	1977-01-01	1977-12-31
1978	1978-01-01	1978-12-31
1979	1979-01-01	1979-12-31
1980	1980-01-01	1980-12-31
1981	1981-01-01	1981-12-31
1982	1982-01-01	1982-12-31
1983	1983-01-01	1983-12-31
1984	1984-01-01	1984-12-31
1985	1985-01-01	1985-12-31
1986	1986-01-01	1986-12-31
1987	1987-01-01	1987-12-31
1989	1989-01-01	1989-12-31
1996	1996-01-01	1996-12-31

Every Fixed Threshold

Fixed thresholds at Tonala (Smn)
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	43	364	1976	351
35 C (95 F): Days	43	309	1977	123
40 C (104 F): Days	16	37	1981	1
90 F (32.2 C): Days	43	349	1976	276
100 F (37.8 C): Days	36	110	1977	5
110 F (43.3 C): Days	2	1	1960	1
20 C (68 F): Tropical nights (min	42	366	1984	356
25 C (77 F): Days with min	41	349	1986	308
10 mm (0.39 in): Days with 10 mm or more rain	46	59	1933	62
25 mm (0.98 in): Days with 25 mm or more rain	46	32	1974	25
50 mm (1.97 in): Days with 50 mm or more rain	46	17	1973	11
100 mm (3.94 in): Days with 100 mm or more rain	22	3	1923	2
200 mm (7.87 in): Days with 200 mm or more rain	4	1	1963	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1923.

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Data for Tonala (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 2026-10-14 (14 October 2026). Threshold counts are computed by this site.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Tonala (Smn) Threshold Days by Year

Key Facts for Tonala (Smn) Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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