Caltepec Threshold Days by Year (MXN00021019)

8 fixed thresholds counted per year at Caltepec (MXN00021019): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Caltepec Thresholds

Caltepec: days with a maximum temperature at or above 30 C (86 F) in 43 years, most in 1997 with 135.
Caltepec: days with 10 mm (0.39 in) or more of precipitation in 43 years, most in 1955 with 26.
Caltepec: days with 25 mm (0.98 in) or more of precipitation in 42 years, most in 1988 with 11.
Caltepec: days with a maximum temperature at or above 90 F (32.2 C) in 41 years, most in 1998 with 60.
8 fixed thresholds have at least one qualifying day at Caltepec.

Days at or above 30 C (86 F)

43 years with a qualifying day

Days per year at Caltepec with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 135 in 1997.

Days at or above 30 C (86 F) per year at Caltepec
Year	Days	Decade average
1955	71	59.2
1956	44	59.2
1957	67	59.2
1958	70	59.2
1959	44	59.2
1960	78	64.8
1961	65	64.8
1962	79	64.8
1963	74	64.8
1964	70	64.8
1966	40	64.8
1967	47	64.8
1968	42	64.8
1969	88	64.8
1970	64	60.1
1971	55	60.1
1972	54	60.1
1973	70	60.1
1974	22	60.1
1975	65	60.1
1976	43	60.1
1977	67	60.1
1978	76	60.1
1979	85	60.1
1980	81	71.1
1981	46	71.1
1982	79	71.1
1983	84	71.1
1984	72	71.1
1987	97	71.1
1988	62	71.1
1989	48	71.1
1990	38	76.8
1991	79	76.8
1992	28	76.8
1993	73	76.8
1994	64	76.8
1997	135	76.8
1998	118	76.8
1999	79	76.8
2000	93	95.7
2001	77	95.7
2002	117	95.7

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

First to last qualifying date each year at Caltepec
Year	First date	Last date
1955	1955-02-22	1955-06-16
1956	1956-02-15	1956-11-01
1957	1957-02-20	1957-11-21
1958	1958-02-27	1958-08-26
1959	1959-02-17	1959-09-26
1960	1960-01-26	1960-08-13
1961	1961-01-25	1961-12-31
1962	1962-02-08	1962-09-30
1963	1963-01-26	1963-11-18
1964	1964-01-22	1964-08-26
1966	1966-03-03	1966-06-08
1967	1967-02-20	1967-08-02
1968	1968-03-09	1968-08-12
1969	1969-02-02	1969-07-29
1970	1970-03-01	1970-10-26
1971	1971-03-01	1971-06-12
1972	1972-03-02	1972-10-31
1973	1973-02-26	1973-06-18
1974	1974-03-25	1974-06-05
1975	1975-02-23	1975-11-29
1976	1976-02-20	1976-11-29
1977	1977-01-05	1977-12-31
1978	1978-02-27	1978-12-08
1979	1979-01-25	1979-11-25
1980	1980-01-11	1980-10-28
1981	1981-03-01	1981-05-27
1982	1982-01-21	1982-11-29
1983	1983-03-09	1983-11-21
1984	1984-02-19	1984-07-27
1987	1987-01-06	1987-12-17
1988	1988-02-02	1988-06-12
1989	1989-02-14	1989-11-08
1990	1990-02-10	1990-10-11
1991	1991-02-13	1991-05-31
1992	1992-03-06	1992-06-30
1993	1993-02-21	1993-11-11
1994	1994-01-28	1994-11-29
1997	1997-02-17	1997-12-10
1998	1998-02-04	1998-07-06
1999	1999-03-03	1999-08-29
2000	2000-02-11	2000-11-30
2001	2001-01-17	2001-12-10
2002	2002-01-18	2002-12-26

Every Fixed Threshold

Fixed thresholds at Caltepec
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	43	135	1997	117
35 C (95 F): Days	22	32	1998	1
90 F (32.2 C): Days	41	60	1998	2
100 F (37.8 C): Days	2	3	1998	2
0 C (32 F): Frost days (min	17	7	1956	1
10 mm (0.39 in): Days with 10 mm or more rain	43	26	1955	19
25 mm (0.98 in): Days with 25 mm or more rain	42	11	1988	3
50 mm (1.97 in): Days with 50 mm or more rain	11	2	1955	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1955.

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Data for Caltepec 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).

Caltepec Threshold Days by Year (MXN00021019)

Key Facts for Caltepec Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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