San Telmo Threshold Days by Year (MXN00002055)

13 fixed thresholds counted per year at San Telmo (MXN00002055): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for San Telmo Thresholds

San Telmo: days with 10 mm (0.39 in) or more of precipitation in 35 years, most in 1978 with 17.
San Telmo: days with a maximum temperature at or above 30 C (86 F) in 32 years, most in 1979 with 97.
San Telmo: days with a maximum temperature at or above 35 C (95 F) in 32 years, most in 1979 with 32.
San Telmo: days with a maximum temperature at or above 90 F (32.2 C) in 32 years, most in 1979 with 59.
13 fixed thresholds have at least one qualifying day at San Telmo.

Days at or above 30 C (86 F)

32 years with a qualifying day

Days per year at San Telmo with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 97 in 1979.

Days at or above 30 C (86 F) per year at San Telmo
Year	Days	Decade average
1949	66	66
1950	37	42.3
1951	25	42.3
1952	41	42.3
1953	77	42.3
1954	40	42.3
1955	25	42.3
1956	43	42.3
1957	35	42.3
1958	52	42.3
1959	48	42.3
1960	53	41.6
1961	33	41.6
1962	36	41.6
1963	41	41.6
1965	38	41.6
1966	33	41.6
1967	52	41.6
1968	47	41.6
1970	27	49.3
1971	43	49.3
1972	40	49.3
1973	53	49.3
1974	31	49.3
1975	31	49.3
1976	39	49.3
1977	79	49.3
1978	53	49.3
1979	97	49.3
1980	77	83
1981	86	83
1984	86	83

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

First to last qualifying date each year at San Telmo
Year	First date	Last date
1949	1949-04-10	1949-12-31
1950	1950-03-21	1950-12-09
1951	1951-03-15	1951-10-10
1952	1952-06-30	1952-12-12
1953	1953-01-10	1953-11-29
1954	1954-06-25	1954-11-20
1955	1955-03-07	1955-11-03
1956	1956-05-14	1956-11-26
1957	1957-02-10	1957-11-11
1958	1958-04-14	1958-10-29
1959	1959-03-11	1959-12-02
1960	1960-03-20	1960-10-21
1961	1961-04-03	1961-10-25
1962	1962-04-06	1962-11-01
1963	1963-02-04	1963-11-11
1965	1965-01-18	1965-12-05
1966	1966-07-12	1966-11-03
1967	1967-03-01	1967-11-13
1968	1968-03-04	1968-11-11
1970	1970-05-02	1970-10-02
1971	1971-01-17	1971-10-10
1972	1972-05-27	1972-10-18
1973	1973-06-20	1973-12-08
1974	1974-04-06	1974-12-07
1975	1975-07-01	1975-11-13
1976	1976-06-26	1976-11-16
1977	1977-02-14	1977-12-07
1978	1978-03-17	1978-11-07
1979	1979-04-13	1979-12-04
1980	1980-02-27	1980-11-29
1981	1981-02-16	1981-11-22
1984	1984-03-26	1984-11-11

Every Fixed Threshold

Fixed thresholds at San Telmo
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	32	97	1979	86
35 C (95 F): Days	32	32	1979	13
40 C (104 F): Days	13	7	1978	3
45 C (113 F): Days	1	1	1958	1
90 F (32.2 C): Days	32	59	1979	28
100 F (37.8 C): Days	22	9	1978	3
110 F (43.3 C): Days	2	1	1958	1
0 C (32 F): Frost days (min	32	59	1956	7
20 C (68 F): Tropical nights (min	21	30	1984	30
25 C (77 F): Days with min	1	1	1974	1
10 mm (0.39 in): Days with 10 mm or more rain	35	17	1978	3
25 mm (0.98 in): Days with 25 mm or more rain	19	4	1965	4
50 mm (1.97 in): Days with 50 mm or more rain	7	2	1984	2

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1949.

Download the Data

Data for San Telmo 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).

San Telmo Threshold Days by Year (MXN00002055)

Key Facts for San Telmo Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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