San Marcos Weather Records (MXN00014183)

Record envelope, standing records and threshold days for San Marcos (MXN00014183), Mexico, with 43 years of record.

Key Facts for San Marcos

San Marcos (MXN00014183) is a weather station in Mexico at 20.78 latitude and -104.18 longitude, 1,380 m (4,527 ft) above sea level.
The station reports from 1947 to 1989, 43 years of record.
1,464 records set at San Marcos still stand.
Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

Location: Mexico, 20.78 latitude, -104.18 longitude.
Elevation: 1,380 m (4,527 ft).
Period of record: 1947 to 1989, 43 years.
Eligible elements: none yet.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at San Marcos. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at San Marcos, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	30.0 C (86.0 F)	-0.6 C (30.9 F)	n/a	n/a
Feb	35.0 C (95.0 F)	1.7 C (35.1 F)	n/a	n/a
Mar	43.9 C (111.0 F)	1.7 C (35.1 F)	n/a	n/a
Apr	36.7 C (98.1 F)	3.9 C (39.0 F)	n/a	n/a
May	37.8 C (100.0 F)	5.0 C (41.0 F)	n/a	n/a
Jun	36.7 C (98.1 F)	6.7 C (44.1 F)	n/a	n/a
Jul	35.0 C (95.0 F)	10.0 C (50.0 F)	n/a	n/a
Aug	31.7 C (89.1 F)	10.0 C (50.0 F)	n/a	n/a
Sep	30.0 C (86.0 F)	8.9 C (48.0 F)	n/a	n/a
Oct	35.0 C (95.0 F)	5.6 C (42.1 F)	n/a	n/a
Nov	31.7 C (89.1 F)	5.0 C (41.0 F)	n/a	n/a
Dec	30.0 C (86.0 F)	0.6 C (33.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at San Marcos still stand. 1986 holds the most, with 311.

Wettest Day of Each Month

Sep: 124.2 mm (4.9 in)

The wettest day on record for each calendar month at San Marcos. The most was 124.2 mm (4.9 in) on 30 September 1963.

Record daily precipitation for each month at San Marcos
Month	Record daily precipitation (mm)	Date
Jan	18.8 mm (0.7 in)	29 January 1964
Feb	47.0 mm (1.9 in)	22 February 1970
Mar	36.8 mm (1.4 in)	31 March 1968
Apr	16.5 mm (0.6 in)	13 April 1963
May	33.0 mm (1.3 in)	31 May 1967
Jun	95.0 mm (3.7 in)	30 June 1964
Jul	66.8 mm (2.6 in)	31 July 1971
Aug	109.5 mm (4.3 in)	31 August 1966
Sep	124.2 mm (4.9 in)	30 September 1963
Oct	35.6 mm (1.4 in)	31 October 1964
Nov	43.4 mm (1.7 in)	4 November 1986
Dec	18.3 mm (0.7 in)	31 December 1968

Period of Record Coverage

1985 to 1989

5 years of record at San Marcos, 1985 to 1989. 2 years have data for under 90 percent of days and are left out of rankings: 1985, 1989.

Latest Records

No records were set at this station in the latest data.

Extremes by Year

1947 to 1989

Yearly extremes at San Marcos: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	43.9 C (111.0 F)	1988	36.7 C (98.1 F)	5
Coldest night (TNn)	-0.6 C (30.9 F)	1988	0.6 C (33.1 F)	5
Wettest day (Rx1day)	124.2 mm (4.9 in)	1963	59.9 mm (2.4 in)	25
Wettest five days (Rx5day)	188.5 mm (7.4 in)	1987	95.3 mm (3.8 in)	25
Longest dry spell (CDD)	163 days	1960	85 days	25

Hottest day (TXx)

The hottest day of the year at San Marcos, 1947 to 1989. The record is 43.9 C (111.0 F) in 1988, marked on the chart; the median year is 36.7 C (98.1 F).

Hottest day (TXx) at San Marcos by year
Year	Hottest day (TXx)
1947	n/a
1948	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	n/a
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	n/a
1977	n/a
1985	35.6 C (96.1 F)
1986	36.7 C (98.1 F)
1987	33.9 C (93.0 F)
1988	43.9 C (111.0 F)
1989	37.8 C (100.0 F)

Coldest night (TNn)

The coldest night of the year at San Marcos, 1947 to 1989. The record is -0.6 C (30.9 F) in 1988, marked on the chart; the median year is 0.6 C (33.1 F).

Coldest night (TNn) at San Marcos by year
Year	Coldest night (TNn)
1947	n/a
1948	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	n/a
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	n/a
1977	n/a
1985	2.8 C (37.0 F)
1986	0.6 C (33.1 F)
1987	0.6 C (33.1 F)
1988	-0.6 C (30.9 F)
1989	1.7 C (35.1 F)

Wettest day (Rx1day)

The wettest day of the year at San Marcos, 1947 to 1989. The record is 124.2 mm (4.9 in) in 1963, marked on the chart; the median year is 59.9 mm (2.4 in).

Wettest day (Rx1day) at San Marcos by year
Year	Wettest day (Rx1day)
1947	90.4 mm (3.6 in)
1948	68.6 mm (2.7 in)
1959	20.6 mm (0.8 in)
1960	29.0 mm (1.1 in)
1961	25.4 mm (1.0 in)
1962	30.0 mm (1.2 in)
1963	124.2 mm (4.9 in)
1964	95.0 mm (3.7 in)
1966	109.5 mm (4.3 in)
1967	75.2 mm (3.0 in)
1968	65.5 mm (2.6 in)
1969	35.1 mm (1.4 in)
1970	47.5 mm (1.9 in)
1971	66.8 mm (2.6 in)
1972	65.3 mm (2.6 in)
1973	62.5 mm (2.5 in)
1974	48.3 mm (1.9 in)
1975	58.9 mm (2.3 in)
1976	56.6 mm (2.2 in)
1977	23.6 mm (0.9 in)
1985	47.8 mm (1.9 in)
1986	79.8 mm (3.1 in)
1987	98.3 mm (3.9 in)
1988	59.9 mm (2.4 in)
1989	47.8 mm (1.9 in)

Wettest five days (Rx5day)

The wettest five days of the year at San Marcos, 1947 to 1989. The record is 188.5 mm (7.4 in) in 1987, marked on the chart; the median year is 95.3 mm (3.8 in).

Wettest five days (Rx5day) at San Marcos by year
Year	Wettest five days (Rx5day)
1947	105.9 mm (4.2 in)
1948	129.8 mm (5.1 in)
1959	32.8 mm (1.3 in)
1960	124.9 mm (4.9 in)
1961	85.9 mm (3.4 in)
1962	111.8 mm (4.4 in)
1963	151.4 mm (6.0 in)
1964	157.0 mm (6.2 in)
1966	126.0 mm (5.0 in)
1967	95.3 mm (3.8 in)
1968	85.3 mm (3.4 in)
1969	48.0 mm (1.9 in)
1970	63.0 mm (2.5 in)
1971	75.9 mm (3.0 in)
1972	78.8 mm (3.1 in)
1973	65.1 mm (2.6 in)
1974	65.6 mm (2.6 in)
1975	67.3 mm (2.6 in)
1976	64.0 mm (2.5 in)
1977	32.5 mm (1.3 in)
1985	102.4 mm (4.0 in)
1986	140.1 mm (5.5 in)
1987	188.5 mm (7.4 in)
1988	141.5 mm (5.6 in)
1989	127.6 mm (5.0 in)

Longest dry spell (CDD)

The longest dry spell of the year at San Marcos, 1947 to 1989. The record is 163 days in 1960, marked on the chart; the median year is 85 days.

Longest dry spell (CDD) at San Marcos by year
Year	Longest dry spell (CDD)
1947	40 days
1948	47 days
1959	66 days
1960	163 days
1961	133 days
1962	136 days
1963	59 days
1964	133 days
1966	69 days
1967	58 days
1968	45 days
1969	85 days
1970	75 days
1971	112 days
1972	142 days
1973	85 days
1974	43 days
1975	131 days
1976	87 days
1977	90 days
1985	74 days
1986	157 days
1987	76 days
1988	108 days
1989	147 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Download the Data

Data for San Marcos standing records by year: CSV or JSON. Field meanings are on the data page.
Data for San Marcos 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 2026-10-16 (16 October 2026). Records are computed by this site and are not official.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Year	Days with data	Share of year	Complete
1985	290	79%	No
1986	365	100%	Yes
1987	364	100%	Yes
1988	365	100%	Yes
1989	328	90%	No