Tacotan Threshold Days by Year (MXN00014139)

11 fixed thresholds counted per year at Tacotan (MXN00014139): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Tacotan Thresholds

Tacotan: days with 10 mm (0.39 in) or more of precipitation in 49 years, most in 1967 with 39.
Tacotan: days with 25 mm (0.98 in) or more of precipitation in 49 years, most in 1967 with 16.
Tacotan: days with a maximum temperature at or above 30 C (86 F) in 45 years, most in 1957 with 164.
Tacotan: days with a maximum temperature at or above 90 F (32.2 C) in 45 years, most in 1991 with 73.
11 fixed thresholds have at least one qualifying day at Tacotan.

Days at or above 30 C (86 F)

45 years with a qualifying day

Days per year at Tacotan with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 164 in 1957.

Days at or above 30 C (86 F) per year at Tacotan
Year	Days	Decade average
1947	122	115.3
1948	111	115.3
1949	113	115.3
1950	121	129.3
1951	118	129.3
1952	110	129.3
1953	159	129.3
1954	156	129.3
1955	154	129.3
1956	146	129.3
1957	164	129.3
1958	131	129.3
1959	34	129.3
1960	100	103.3
1961	68	103.3
1962	126	103.3
1963	126	103.3
1964	102	103.3
1965	134	103.3
1966	76	103.3
1967	101	103.3
1968	79	103.3
1969	121	103.3
1970	112	109.6
1971	95	109.6
1972	134	109.6
1973	116	109.6
1974	116	109.6
1975	123	109.6
1976	108	109.6
1977	92	109.6
1978	90	109.6
1980	99	117.8
1981	75	117.8
1982	136	117.8
1983	128	117.8
1984	125	117.8
1985	145	117.8
1986	111	117.8
1988	123	117.8
1991	132	110.2
1993	101	110.2
1996	103	110.2
1997	96	110.2
1998	119	110.2

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

First to last qualifying date each year at Tacotan
Year	First date	Last date
1947	1947-02-18	1947-11-08
1948	1948-02-03	1948-12-19
1949	1949-02-10	1949-12-19
1950	1950-01-02	1950-12-21
1951	1951-01-21	1951-12-26
1952	1952-01-03	1952-11-30
1953	1953-01-08	1953-11-28
1954	1954-01-04	1954-12-09
1955	1955-02-15	1955-12-25
1956	1956-01-29	1956-12-23
1957	1957-01-01	1957-12-25
1958	1958-01-13	1958-11-18
1959	1959-02-16	1959-06-22
1960	1960-01-27	1960-11-26
1961	1961-03-07	1961-11-18
1962	1962-02-09	1962-11-25
1963	1963-01-25	1963-11-06
1964	1964-02-13	1964-08-30
1965	1965-02-24	1965-11-28
1966	1966-02-28	1966-11-12
1967	1967-02-04	1967-11-26
1968	1968-03-25	1968-11-03
1969	1969-02-17	1969-11-18
1970	1970-03-03	1970-12-28
1971	1971-01-25	1971-11-21
1972	1972-02-21	1972-11-14
1973	1973-02-02	1973-11-09
1974	1974-02-12	1974-12-05
1975	1975-03-01	1975-12-03
1976	1976-02-07	1976-11-01
1977	1977-03-09	1977-10-15
1978	1978-03-02	1978-11-24
1980	1980-02-15	1980-10-24
1981	1981-03-01	1981-10-22
1982	1982-02-08	1982-11-22
1983	1983-03-08	1983-11-15
1984	1984-02-16	1984-11-18
1985	1985-02-12	1985-11-20
1986	1986-01-01	1986-11-20
1988	1988-02-02	1988-12-24
1991	1991-02-14	1991-12-04
1993	1993-02-17	1993-12-11
1996	1996-01-30	1996-12-11
1997	1997-02-16	1997-12-07
1998	1998-02-18	1998-12-20

Every Fixed Threshold

Fixed thresholds at Tacotan
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	45	164	1957	119
35 C (95 F): Days	43	33	1991	21
40 C (104 F): Days	1	1	1991	1
90 F (32.2 C): Days	45	73	1991	51
100 F (37.8 C): Days	10	6	1991	2
0 C (32 F): Frost days (min	11	8	1951	2
20 C (68 F): Tropical nights (min	28	9	1960	1
10 mm (0.39 in): Days with 10 mm or more rain	49	39	1967	27
25 mm (0.98 in): Days with 25 mm or more rain	49	16	1967	9
50 mm (1.97 in): Days with 50 mm or more rain	36	2	1951	2
100 mm (3.94 in): Days with 100 mm or more rain	1	1	1971	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1947.

Download the Data

Data for Tacotan 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).

Tacotan Threshold Days by Year (MXN00014139)

Key Facts for Tacotan Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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