Altepexi Threshold Days by Year (MXN00021010)

11 fixed thresholds counted per year at Altepexi (MXN00021010): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Altepexi Thresholds

Altepexi: days with 10 mm (0.39 in) or more of precipitation in 36 years, most in 1958 with 21.
Altepexi: days with 25 mm (0.98 in) or more of precipitation in 31 years, most in 1955 with 7.
Altepexi: days with a maximum temperature at or above 30 C (86 F) in 19 years, most in 1977 with 291.
Altepexi: days with a maximum temperature at or above 35 C (95 F) in 19 years, most in 1971 with 126.
11 fixed thresholds have at least one qualifying day at Altepexi.

Days at or above 30 C (86 F)

19 years with a qualifying day

Days per year at Altepexi with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 291 in 1977.

Days at or above 30 C (86 F) per year at Altepexi
Year	Days	Decade average
1970	257	262.1
1971	275	262.1
1972	276	262.1
1973	278	262.1
1974	253	262.1
1975	234	262.1
1976	263	262.1
1977	291	262.1
1978	260	262.1
1979	234	262.1
1980	245	242.4
1981	243	242.4
1982	284	242.4
1983	233	242.4
1984	207	242.4
1991	159	154
1992	157	154
1994	131	154
1995	169	154

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

First to last qualifying date each year at Altepexi
Year	First date	Last date
1970	1970-01-02	1970-12-31
1971	1971-01-01	1971-12-20
1972	1972-01-08	1972-12-31
1973	1973-01-01	1973-12-31
1974	1974-01-01	1974-12-28
1975	1975-01-01	1975-12-01
1976	1976-01-01	1976-12-31
1977	1977-01-02	1977-12-31
1978	1978-01-01	1978-12-31
1979	1979-01-01	1979-12-28
1980	1980-01-07	1980-12-08
1981	1981-01-09	1981-12-31
1982	1982-01-01	1982-12-28
1983	1983-01-08	1983-12-28
1984	1984-01-07	1984-12-31
1991	1991-01-11	1991-12-02
1992	1992-01-08	1992-12-25
1994	1994-01-26	1994-12-02
1995	1995-01-20	1995-12-28

Every Fixed Threshold

Fixed thresholds at Altepexi
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	19	291	1977	169
35 C (95 F): Days	19	126	1971	48
40 C (104 F): Days	14	27	1974	2
45 C (113 F): Days	1	1	1974	1
90 F (32.2 C): Days	19	206	1982	85
100 F (37.8 C): Days	17	52	1973	9
110 F (43.3 C): Days	1	2	1974	2
20 C (68 F): Tropical nights (min	17	36	1983	3
10 mm (0.39 in): Days with 10 mm or more rain	36	21	1958	11
25 mm (0.98 in): Days with 25 mm or more rain	31	7	1955	4
50 mm (1.97 in): Days with 50 mm or more rain	12	3	1958	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1970.

Download the Data

Data for Altepexi 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).

Altepexi Threshold Days by Year (MXN00021010)

Key Facts for Altepexi Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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