San Marcos Tlazalpan Threshold Days by Year (MXN00015142)

5 fixed thresholds counted per year at San Marcos Tlazalpan (MXN00015142): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for San Marcos Tlazalpan Thresholds

San Marcos Tlazalpan: days with 10 mm (0.39 in) or more of precipitation in 28 years, most in 1976 with 34.
San Marcos Tlazalpan: nights with a minimum temperature at or below 0 C (32 F) in 21 years, most in 1985 with 167.
San Marcos Tlazalpan: days with 25 mm (0.98 in) or more of precipitation in 16 years, most in 1966 with 6.
San Marcos Tlazalpan: nights with a minimum temperature at or below -10 C (14 F) in 8 years, most in 1976 with 6.
5 fixed thresholds have at least one qualifying day at San Marcos Tlazalpan.

Nights at or below 0 C (32 F)

21 years with a qualifying day

Days per year at San Marcos Tlazalpan with nights with a minimum temperature at or below 0 C (32 F), with the decade average as a line. The most was 167 in 1985.

Nights at or below 0 C (32 F) per year at San Marcos Tlazalpan
Year	Days	Decade average
1974	122	112
1975	110	112
1976	97	112
1977	124	112
1978	90	112
1979	129	112
1980	126	138.4
1981	103	138.4
1982	149	138.4
1983	139	138.4
1984	154	138.4
1985	167	138.4
1986	131	138.4
1990	125	123.4
1991	117	123.4
1993	140	123.4
1996	155	123.4
1997	124	123.4
1998	78	123.4
1999	125	123.4
2000	140	140

For each year, a bar from the first to the last day at San Marcos Tlazalpan meeting 0 C (32 F).

First to last qualifying date each year at San Marcos Tlazalpan
Year	First date	Last date
1974	1974-01-01	1974-12-31
1975	1975-01-01	1975-12-31
1976	1976-01-01	1976-12-28
1977	1977-01-01	1977-12-31
1978	1978-01-01	1978-12-31
1979	1979-01-01	1979-12-31
1980	1980-01-01	1980-12-31
1981	1981-01-01	1981-12-31
1982	1982-01-01	1982-12-30
1983	1983-01-03	1983-12-31
1984	1984-01-01	1984-12-31
1985	1985-01-01	1985-12-31
1986	1986-01-01	1986-12-31
1990	1990-01-01	1990-12-31
1991	1991-01-01	1991-12-31
1993	1993-01-01	1993-12-31
1996	1996-01-02	1996-12-31
1997	1997-01-01	1997-12-31
1998	1998-01-15	1998-12-31
1999	1999-01-01	1999-12-31
2000	2000-01-01	2000-12-31

Every Fixed Threshold

Fixed thresholds at San Marcos Tlazalpan
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
0 C (32 F): Frost days (min	21	167	1985	140
-10 C (14 F): Days with min	8	6	1976	1
10 mm (0.39 in): Days with 10 mm or more rain	28	34	1976	13
25 mm (0.98 in): Days with 25 mm or more rain	16	6	1966	1
50 mm (1.97 in): Days with 50 mm or more rain	1	2	1966	2

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1974.

Download the Data

Data for San Marcos Tlazalpan 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 Marcos Tlazalpan Threshold Days by Year (MXN00015142)

Key Facts for San Marcos Tlazalpan Thresholds

Nights at or below 0 C (32 F)

Every Fixed Threshold

Download the Data

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