Altamira (Smn) Threshold Days by Year (MXN00028004)

12 fixed thresholds counted per year at Altamira (Smn) (MXN00028004): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Altamira (Smn) Thresholds

Altamira (Smn): days with 10 mm (0.39 in) or more of precipitation in 14 years, most in 1968 with 34.
Altamira (Smn): days with 25 mm (0.98 in) or more of precipitation in 14 years, most in 1967 with 16.
Altamira (Smn): days with a maximum temperature at or above 30 C (86 F) in 13 years, most in 1971 with 260.
Altamira (Smn): days with a maximum temperature at or above 35 C (95 F) in 13 years, most in 1964 with 40.
12 fixed thresholds have at least one qualifying day at Altamira (Smn).

Days at or above 30 C (86 F)

13 years with a qualifying day

Days per year at Altamira (Smn) with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 260 in 1971.

Days at or above 30 C (86 F) per year at Altamira (Smn)
Year	Days	Decade average
1961	172	192.6
1962	180	192.6
1963	205	192.6
1964	207	192.6
1965	217	192.6
1966	180	192.6
1967	188	192.6
1968	192	192.6
1970	195	227.5
1971	260	227.5
1984	181	181
1986	191	181
1989	171	181

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

First to last qualifying date each year at Altamira (Smn)
Year	First date	Last date
1961	1961-03-07	1961-12-10
1962	1962-01-25	1962-11-07
1963	1963-01-10	1963-11-24
1964	1964-01-13	1964-12-26
1965	1965-02-10	1965-12-14
1966	1966-04-02	1966-11-11
1967	1967-03-05	1967-12-26
1968	1968-01-05	1968-11-27
1970	1970-02-02	1970-12-30
1971	1971-01-02	1971-12-31
1984	1984-02-12	1984-12-22
1986	1986-02-16	1986-11-24
1989	1989-01-17	1989-11-26

Every Fixed Threshold

Fixed thresholds at Altamira (Smn)
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	13	260	1971	171
35 C (95 F): Days	13	40	1964	16
40 C (104 F): Days	3	3	1984	3
90 F (32.2 C): Days	13	119	1971	79
100 F (37.8 C): Days	8	5	1984	1
110 F (43.3 C): Days	1	1	1984	1
20 C (68 F): Tropical nights (min	13	236	1963	177
25 C (77 F): Days with min	13	92	1962	12
10 mm (0.39 in): Days with 10 mm or more rain	14	34	1968	17
25 mm (0.98 in): Days with 25 mm or more rain	14	16	1967	4
50 mm (1.97 in): Days with 50 mm or more rain	12	8	1970	1
100 mm (3.94 in): Days with 100 mm or more rain	2	3	1970	3

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1961.

Download the Data

Data for Altamira (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).

Altamira (Smn) Threshold Days by Year (MXN00028004)

Key Facts for Altamira (Smn) Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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