Zacualpan Weather Records (MXN00015136)

Record envelope, standing records and threshold days for Zacualpan (MXN00015136), Mexico, with 42 years of record.

Key Facts for Zacualpan

Zacualpan (MXN00015136) is a weather station in Mexico at 18.70 latitude and -99.77 longitude, 2,005 m (6,578 ft) above sea level.
The station reports from 1961 to 2002, 42 years of record.
1,464 records set at Zacualpan still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Zacualpan set a daily record precipitation of 22.4 mm (0.9 in) on 30 July 2002.

About the Station

Location: Mexico, 18.70 latitude, -99.77 longitude.
Elevation: 2,005 m (6,578 ft).
Period of record: 1961 to 2002, 42 years.
Eligible elements: prcp.

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 Zacualpan. 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 Zacualpan, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	30.6 C (87.1 F)	1.7 C (35.1 F)	n/a	n/a
Feb	31.1 C (88.0 F)	1.1 C (34.0 F)	n/a	n/a
Mar	36.7 C (98.1 F)	4.4 C (39.9 F)	n/a	n/a
Apr	36.7 C (98.1 F)	6.7 C (44.1 F)	n/a	n/a
May	36.7 C (98.1 F)	8.3 C (46.9 F)	n/a	n/a
Jun	31.7 C (89.1 F)	8.9 C (48.0 F)	n/a	n/a
Jul	29.4 C (84.9 F)	7.2 C (45.0 F)	n/a	n/a
Aug	32.2 C (90.0 F)	8.9 C (48.0 F)	n/a	n/a
Sep	28.9 C (84.0 F)	6.7 C (44.1 F)	n/a	n/a
Oct	28.3 C (82.9 F)	3.9 C (39.0 F)	n/a	n/a
Nov	27.8 C (82.0 F)	2.8 C (37.0 F)	n/a	n/a
Dec	28.9 C (84.0 F)	2.8 C (37.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Zacualpan still stand. 2002 holds the most, with 302.

Wettest Day of Each Month

Jul: 75.4 mm (3.0 in)

The wettest day on record for each calendar month at Zacualpan. The most was 75.4 mm (3.0 in) on 18 July 1988.

Record daily precipitation for each month at Zacualpan
Month	Record daily precipitation (mm)	Date
Jan	39.9 mm (1.6 in)	25 January 1980
Feb	30.0 mm (1.2 in)	4 February 1980
Mar	39.9 mm (1.6 in)	14 March 1978
Apr	46.0 mm (1.8 in)	14 April 1981
May	68.8 mm (2.7 in)	28 May 1971
Jun	67.8 mm (2.7 in)	16 June 1967
Jul	75.4 mm (3.0 in)	18 July 1988
Aug	67.8 mm (2.7 in)	14 August 1969
Sep	71.9 mm (2.8 in)	14 September 1961
Oct	47.8 mm (1.9 in)	13 October 1970
Nov	47.0 mm (1.9 in)	20 November 1961
Dec	31.8 mm (1.3 in)	19 December 1976

Period of Record Coverage

1976 to 2002

18 years of record at Zacualpan, 1976 to 2002. 7 years have data for under 90 percent of days and are left out of rankings: 1976, 1985, 1988, 1989, 1994, 2001, 2002.

Days with data per year at Zacualpan
Year	Days with data	Share of year	Complete
1976	129	35%	No
1977	356	98%	Yes
1978	360	99%	Yes
1979	363	99%	Yes
1980	365	100%	Yes
1981	365	100%	Yes
1982	365	100%	Yes
1983	365	100%	Yes
1984	366	100%	Yes
1985	245	67%	No
1986	365	100%	Yes
1987	365	100%	Yes
1988	274	75%	No
1989	243	67%	No
1990	357	98%	Yes
1994	59	16%	No
2001	88	24%	No
2002	264	72%	No

Latest Records

Latest records at Zacualpan
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
30 July 2002	Zacualpan, MX	daily rain	22.4 mm (0.9 in)	0.6 mm (0.02 in)	24 years	11 of 100 (Routine)
29 June 2002	Zacualpan, MX	daily rain	40.6 mm (1.6 in)	10.6 mm (0.4 in)	25 years	20 of 100 (Routine)
7 June 2002	Zacualpan, MX	daily rain	37.6 mm (1.5 in)	7.6 mm (0.30 in)	15 years	14 of 100 (Routine)
5 June 2002	Zacualpan, MX	daily rain	38.4 mm (1.5 in)	10.5 mm (0.4 in)	40 years	25 of 100 (Routine)
12 February 2002	Zacualpan, MX	daily rain	6.1 mm (0.24 in)	1.3 mm (0.05 in)	23 years	11 of 100 (Routine)
13 January 2002	Zacualpan, MX	daily rain	25.4 mm (1.0 in)	25.4 mm (1.0 in)	40 years	46 of 100 (Notable)
26 December 2001	Zacualpan, MX	daily rain	4.3 mm (0.17 in)	4.3 mm (0.17 in)	40 years	20 of 100 (Routine)
14 October 2001	Zacualpan, MX	daily rain	26.9 mm (1.1 in)	6.8 mm (0.27 in)	28 years	19 of 100 (Routine)

Climate Trend

11 complete years, 1977 to 1990

One stripe for each of 11 complete years at Zacualpan, 1977 to 1990. Blue stripes are years cooler than the station's own mean of 17.9 C (64.3 F); red stripes are warmer. The coolest year was 1984, at 17.4 C (63.2 F), and the warmest was 1978, at 18.4 C (65.0 F). The strongest colour marks a difference of 0.6 C (1.1 F).

Annual mean temperature at Zacualpan as warming stripes, 1977 to 1990
Year	Annual mean temperature	Difference from the station mean
1977	17.9 C	-0.03 C
1978	18.4 C	+0.43 C
1979	18.3 C	+0.38 C
1980	17.9 C	-0.06 C
1981	17.5 C	-0.39 C
1982	18.2 C	+0.28 C
1983	17.9 C	-0.01 C
1984	17.4 C	-0.57 C
1986	18.0 C	+0.09 C
1987	17.7 C	-0.24 C
1990	18.1 C	+0.15 C

This station does not have enough complete years (30 are needed) to fit a temperature trend.

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1961 to 2002

Yearly extremes at Zacualpan: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	36.7 C (98.1 F)	2002	31.4 C (88.5 F)	18
Coldest night (TNn)	1.1 C (34.0 F)	2002	5.6 C (42.1 F)	18
Wettest day (Rx1day)	75.4 mm (3.0 in)	1988	47.8 mm (1.9 in)	33
Wettest five days (Rx5day)	210.6 mm (8.3 in)	1988	111.6 mm (4.4 in)	33
Longest dry spell (CDD)	129 days	1970	66 days	33

Hottest day (TXx)

The hottest day of the year at Zacualpan, 1961 to 2002. The record is 36.7 C (98.1 F) in 2002, marked on the chart; the median year is 31.4 C (88.5 F).

Hottest day (TXx) at Zacualpan by year
Year	Hottest day (TXx)
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	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	26.1 C (79.0 F)
1977	32.2 C (90.0 F)
1978	32.2 C (90.0 F)
1979	31.7 C (89.1 F)
1980	31.1 C (88.0 F)
1981	30.6 C (87.1 F)
1982	31.7 C (89.1 F)
1983	32.2 C (90.0 F)
1984	30.6 C (87.1 F)
1985	26.7 C (80.1 F)
1986	31.7 C (89.1 F)
1987	31.7 C (89.1 F)
1988	32.8 C (91.0 F)
1989	30.6 C (87.1 F)
1990	30.0 C (86.0 F)
1994	30.0 C (86.0 F)
2001	28.9 C (84.0 F)
2002	36.7 C (98.1 F)

Coldest night (TNn)

The coldest night of the year at Zacualpan, 1961 to 2002. The record is 1.1 C (34.0 F) in 2002, marked on the chart; the median year is 5.6 C (42.1 F).

Coldest night (TNn) at Zacualpan by year
Year	Coldest night (TNn)
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	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	6.7 C (44.1 F)
1977	6.7 C (44.1 F)
1978	5.0 C (41.0 F)
1979	5.6 C (42.1 F)
1980	7.8 C (46.0 F)
1981	5.0 C (41.0 F)
1982	8.3 C (46.9 F)
1983	5.6 C (42.1 F)
1984	5.0 C (41.0 F)
1985	7.8 C (46.0 F)
1986	6.7 C (44.1 F)
1987	6.7 C (44.1 F)
1988	5.0 C (41.0 F)
1989	7.2 C (45.0 F)
1990	5.0 C (41.0 F)
1994	5.0 C (41.0 F)
2001	2.8 C (37.0 F)
2002	1.1 C (34.0 F)

Wettest day (Rx1day)

The wettest day of the year at Zacualpan, 1961 to 2002. The record is 75.4 mm (3.0 in) in 1988, marked on the chart; the median year is 47.8 mm (1.9 in).

Wettest day (Rx1day) at Zacualpan by year
Year	Wettest day (Rx1day)
1961	71.9 mm (2.8 in)
1962	66.8 mm (2.6 in)
1963	47.8 mm (1.9 in)
1964	32.8 mm (1.3 in)
1965	32.8 mm (1.3 in)
1966	33.8 mm (1.3 in)
1967	69.9 mm (2.8 in)
1968	63.0 mm (2.5 in)
1969	67.8 mm (2.7 in)
1970	47.8 mm (1.9 in)
1971	68.8 mm (2.7 in)
1972	56.9 mm (2.2 in)
1973	47.8 mm (1.9 in)
1974	34.8 mm (1.4 in)
1975	39.9 mm (1.6 in)
1976	43.9 mm (1.7 in)
1977	45.0 mm (1.8 in)
1978	45.0 mm (1.8 in)
1979	45.0 mm (1.8 in)
1980	64.8 mm (2.6 in)
1981	46.0 mm (1.8 in)
1982	49.8 mm (2.0 in)
1983	49.8 mm (2.0 in)
1984	41.9 mm (1.6 in)
1985	41.9 mm (1.6 in)
1986	41.9 mm (1.6 in)
1987	59.9 mm (2.4 in)
1988	75.4 mm (3.0 in)
1989	63.8 mm (2.5 in)
1990	55.9 mm (2.2 in)
1994	0.0 mm (0.00 in)
2001	26.9 mm (1.1 in)
2002	40.6 mm (1.6 in)

Wettest five days (Rx5day)

The wettest five days of the year at Zacualpan, 1961 to 2002. The record is 210.6 mm (8.3 in) in 1988, marked on the chart; the median year is 111.6 mm (4.4 in).

Wettest five days (Rx5day) at Zacualpan by year
Year	Wettest five days (Rx5day)
1961	192.6 mm (7.6 in)
1962	117.4 mm (4.6 in)
1963	153.2 mm (6.0 in)
1964	91.3 mm (3.6 in)
1965	90.2 mm (3.6 in)
1966	72.4 mm (2.9 in)
1967	200.5 mm (7.9 in)
1968	101.3 mm (4.0 in)
1969	159.2 mm (6.3 in)
1970	156.2 mm (6.1 in)
1971	119.4 mm (4.7 in)
1972	158.4 mm (6.2 in)
1973	143.3 mm (5.6 in)
1974	107.5 mm (4.2 in)
1975	104.7 mm (4.1 in)
1976	132.4 mm (5.2 in)
1977	64.8 mm (2.6 in)
1978	64.8 mm (2.6 in)
1979	100.9 mm (4.0 in)
1980	100.3 mm (3.9 in)
1981	98.3 mm (3.9 in)
1982	141.5 mm (5.6 in)
1983	111.6 mm (4.4 in)
1984	111.2 mm (4.4 in)
1985	94.9 mm (3.7 in)
1986	54.7 mm (2.2 in)
1987	115.6 mm (4.6 in)
1988	210.6 mm (8.3 in)
1989	134.3 mm (5.3 in)
1990	119.4 mm (4.7 in)
1994	0.0 mm (0.00 in)
2001	29.0 mm (1.1 in)
2002	115.2 mm (4.5 in)

Longest dry spell (CDD)

The longest dry spell of the year at Zacualpan, 1961 to 2002. The record is 129 days in 1970, marked on the chart; the median year is 66 days.

Longest dry spell (CDD) at Zacualpan by year
Year	Longest dry spell (CDD)
1961	83 days
1962	101 days
1963	66 days
1964	113 days
1965	47 days
1966	47 days
1967	29 days
1968	49 days
1969	79 days
1970	129 days
1971	78 days
1972	108 days
1973	94 days
1974	76 days
1975	99 days
1976	49 days
1977	89 days
1978	56 days
1979	52 days
1980	61 days
1981	63 days
1982	86 days
1983	90 days
1984	116 days
1985	31 days
1986	52 days
1987	85 days
1988	58 days
1989	62 days
1990	66 days
1994	31 days
2001	36 days
2002	27 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 Zacualpan standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Zacualpan 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). Records are computed by this site and are not official.

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