Zacatepec Weather Records (MXN00021105)

Record envelope, standing records and threshold days for Zacatepec (MXN00021105), Mexico, with 46 years of record.

Key Facts for Zacatepec

Zacatepec (MXN00021105) is a weather station in Mexico at 19.25 latitude and -97.53 longitude, 2,375 m (7,791 ft) above sea level.
The station reports from 1945 to 1990, 46 years of record.
1,464 records set at Zacatepec still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Zacatepec tied a monthly record high minimum temperature of 10.0 C (50.0 F) on 30 January 1990.

About the Station

Location: Mexico, 19.25 latitude, -97.53 longitude.
Elevation: 2,375 m (7,791 ft).
Period of record: 1945 to 1990, 46 years.
Eligible elements: tmax, tmin, 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 Zacatepec. 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 Zacatepec, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	28.9 C (84.0 F)	-11.1 C (12.0 F)	n/a	n/a
Feb	28.9 C (84.0 F)	-12.2 C (10.0 F)	n/a	n/a
Mar	31.7 C (89.1 F)	-8.3 C (17.1 F)	n/a	n/a
Apr	35.0 C (95.0 F)	-5.0 C (23.0 F)	n/a	n/a
May	32.8 C (91.0 F)	-4.4 C (24.1 F)	n/a	n/a
Jun	37.8 C (100.0 F)	0.6 C (33.1 F)	n/a	n/a
Jul	33.9 C (93.0 F)	0.6 C (33.1 F)	n/a	n/a
Aug	30.0 C (86.0 F)	0.0 C (32.0 F)	n/a	n/a
Sep	28.9 C (84.0 F)	-3.3 C (26.1 F)	n/a	n/a
Oct	30.6 C (87.1 F)	-4.4 C (24.1 F)	n/a	n/a
Nov	27.2 C (81.0 F)	-11.1 C (12.0 F)	n/a	n/a
Dec	27.8 C (82.0 F)	-9.4 C (15.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Zacatepec still stand. 1987 holds the most, with 70.

Standing records at Zacatepec by the year they were set
Year set	Standing records
1945	29
1946	56
1947	45
1948	30
1949	39
1950	40
1951	37
1957	15
1958	63
1959	51
1960	57
1962	1
1963	43
1964	47
1965	43
1966	50
1969	43
1970	55
1971	55
1972	41
1973	40
1974	47
1975	29
1976	39
1977	22
1978	36
1979	33
1980	34
1981	36
1982	27
1983	47
1984	23
1985	34
1986	21
1987	70
1988	54
1989	27
1990	5

All-Time Record Progression

1 new records

1 all-time records were set at Zacatepec between 22 September 1989 and 22 September 1989. Each dot is a new record.

Wettest Day of Each Month

Aug: 89.9 mm (3.5 in)

The wettest day on record for each calendar month at Zacatepec. The most was 89.9 mm (3.5 in) on 11 August 1978.

Record daily precipitation for each month at Zacatepec
Month	Record daily precipitation (mm)	Date
Jan	41.4 mm (1.6 in)	19 January 1958
Feb	20.8 mm (0.8 in)	26 February 1982
Mar	31.0 mm (1.2 in)	11 March 1974
Apr	33.3 mm (1.3 in)	28 April 1981
May	52.8 mm (2.1 in)	7 May 1982
Jun	56.4 mm (2.2 in)	26 June 1982
Jul	50.0 mm (2.0 in)	3 July 1958
Aug	89.9 mm (3.5 in)	11 August 1978
Sep	69.9 mm (2.8 in)	26 September 1974
Oct	39.9 mm (1.6 in)	21 October 1984
Nov	26.2 mm (1.0 in)	10 November 1966
Dec	27.9 mm (1.1 in)	19 December 1960

Period of Record Coverage

1945 to 1990

38 years of record at Zacatepec, 1945 to 1990. 15 years have data for under 90 percent of days and are left out of rankings: 1945, 1946, 1948, 1950, 1951, 1957, 1962, 1965 and others.

Days with data per year at Zacatepec
Year	Days with data	Share of year	Complete
1945	138	38%	No
1946	326	89%	No
1947	354	97%	Yes
1948	261	71%	No
1949	340	93%	Yes
1950	324	89%	No
1951	148	41%	No
1957	41	11%	No
1958	332	91%	Yes
1959	333	91%	Yes
1960	361	99%	Yes
1962	31	8%	No
1963	365	100%	Yes
1964	366	100%	Yes
1965	305	84%	No
1966	273	75%	No
1969	348	95%	Yes
1970	365	100%	Yes
1971	365	100%	Yes
1972	366	100%	Yes
1973	365	100%	Yes
1974	365	100%	Yes
1975	365	100%	Yes
1976	366	100%	Yes
1977	365	100%	Yes
1978	364	100%	Yes
1979	365	100%	Yes
1980	366	100%	Yes
1981	364	100%	Yes
1982	365	100%	Yes
1983	364	100%	Yes
1984	335	92%	Yes
1985	322	88%	No
1986	180	49%	No
1987	302	83%	No
1988	269	73%	No
1989	180	49%	No
1990	31	8%	No

Latest Records

Latest records at Zacatepec
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
30 January 1990	Zacatepec, MX	monthly high min (Tie)	10.0 C (50.0 F)	tie	44 years	6 of 100 (Routine)
29 January 1990	Zacatepec, MX	monthly high min (Tie)	10.0 C (50.0 F)	tie	44 years	6 of 100 (Routine)
28 January 1990	Zacatepec, MX	daily high max	26.7 C (80.1 F)	1.1 C (2.0 F)	4 years	8 of 100 (Routine)
26 January 1990	Zacatepec, MX	daily high max	26.7 C (80.1 F)	1.1 C (2.0 F)	43 years	19 of 100 (Routine)
21 January 1990	Zacatepec, MX	daily high min (Tie)	5.6 C (42.1 F)	tie	31 years	3 of 100 (Routine)
17 January 1990	Zacatepec, MX	daily high min (Tie)	6.7 C (44.1 F)	tie	2 years	1 of 100 (Routine)
5 January 1990	Zacatepec, MX	monthly high max (Tie)	28.9 C (84.0 F)	tie	39 years	6 of 100 (Routine)
27 December 1989	Zacatepec, MX	daily high min	10.0 C (50.0 F)	3.3 C (5.9 F)	43 years	25 of 100 (Routine)
26 December 1989	Zacatepec, MX	monthly high min	13.9 C (57.0 F)	1.1 C (2.0 F)	43 years	29 of 100 (Routine)
25 December 1989	Zacatepec, MX	monthly high min (Tie)	12.8 C (55.0 F)	tie	43 years	6 of 100 (Routine)
23 December 1989	Zacatepec, MX	daily high min	10.0 C (50.0 F)	1.1 C (2.0 F)	43 years	19 of 100 (Routine)
21 December 1989	Zacatepec, MX	daily high min	8.9 C (48.0 F)	1.7 C (3.1 F)	44 years	21 of 100 (Routine)
20 December 1989	Zacatepec, MX	daily high min	8.9 C (48.0 F)	1.1 C (2.0 F)	6 years	8 of 100 (Routine)
19 December 1989	Zacatepec, MX	daily high min (Tie)	7.8 C (46.0 F)	tie	43 years	4 of 100 (Routine)
14 December 1989	Zacatepec, MX	daily high max (Tie)	25.6 C (78.1 F)	tie	4 years	1 of 100 (Routine)
30 November 1989	Zacatepec, MX	monthly high min	15.0 C (59.0 F)	3.3 C (5.9 F)	43 years	34 of 100 (Routine)
30 November 1989	Zacatepec, MX	daily high max (Tie)	25.0 C (77.0 F)	tie	7 years	1 of 100 (Routine)
29 November 1989	Zacatepec, MX	daily high min (Tie)	10.0 C (50.0 F)	tie	16 years	2 of 100 (Routine)
26 November 1989	Zacatepec, MX	monthly high min (Tie)	11.7 C (53.1 F)	tie	43 years	6 of 100 (Routine)
23 November 1989	Zacatepec, MX	daily high max (Tie)	25.0 C (77.0 F)	tie	18 years	2 of 100 (Routine)

Climate Trend

20 complete years, 1946 to 1983

One stripe for each of 20 complete years at Zacatepec, 1946 to 1983. Blue stripes are years cooler than the station's own mean of 14.5 C (58.1 F); red stripes are warmer. The coolest year was 1974, at 13.8 C (56.8 F), and the warmest was 1946, at 15.4 C (59.6 F). The strongest colour marks a difference of 0.9 C (1.6 F).

Annual mean temperature at Zacatepec as warming stripes, 1946 to 1983
Year	Annual mean temperature	Difference from the station mean
1946	15.4 C	+0.86 C
1947	14.7 C	+0.22 C
1949	15.0 C	+0.47 C
1960	14.4 C	-0.10 C
1963	14.6 C	+0.06 C
1964	14.9 C	+0.38 C
1970	14.2 C	-0.31 C
1971	14.0 C	-0.50 C
1972	14.4 C	-0.13 C
1973	14.7 C	+0.19 C
1974	13.8 C	-0.69 C
1975	14.1 C	-0.39 C
1976	14.1 C	-0.38 C
1977	14.4 C	-0.13 C
1978	14.6 C	+0.10 C
1979	14.6 C	+0.08 C
1980	14.7 C	+0.20 C
1981	14.2 C	-0.30 C
1982	14.5 C	0.00 C
1983	14.9 C	+0.39 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

1945 to 1990

Yearly extremes at Zacatepec: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	37.8 C (100.0 F)	1987	30.6 C (87.1 F)	38
Coldest night (TNn)	-12.2 C (10.0 F)	1976	-5.0 C (23.0 F)	38
Wettest day (Rx1day)	89.9 mm (3.5 in)	1978	29.5 mm (1.2 in)	38
Wettest five days (Rx5day)	169.2 mm (6.7 in)	1978	52.6 mm (2.1 in)	38
Longest dry spell (CDD)	192 days	1949	66 days	38

Hottest day (TXx)

The hottest day of the year at Zacatepec, 1945 to 1990. The record is 37.8 C (100.0 F) in 1987, marked on the chart; the median year is 30.6 C (87.1 F).

Hottest day (TXx) at Zacatepec by year
Year	Hottest day (TXx)
1945	28.3 C (82.9 F)
1946	35.0 C (95.0 F)
1947	28.9 C (84.0 F)
1948	33.3 C (91.9 F)
1949	28.9 C (84.0 F)
1950	30.0 C (86.0 F)
1951	28.3 C (82.9 F)
1957	27.2 C (81.0 F)
1958	33.3 C (91.9 F)
1959	30.0 C (86.0 F)
1960	30.0 C (86.0 F)
1962	25.0 C (77.0 F)
1963	31.7 C (89.1 F)
1964	32.8 C (91.0 F)
1965	31.7 C (89.1 F)
1966	28.9 C (84.0 F)
1969	30.6 C (87.1 F)
1970	31.7 C (89.1 F)
1971	31.7 C (89.1 F)
1972	30.6 C (87.1 F)
1973	31.7 C (89.1 F)
1974	28.9 C (84.0 F)
1975	30.0 C (86.0 F)
1976	30.0 C (86.0 F)
1977	30.6 C (87.1 F)
1978	30.6 C (87.1 F)
1979	30.0 C (86.0 F)
1980	30.6 C (87.1 F)
1981	30.0 C (86.0 F)
1982	30.6 C (87.1 F)
1983	32.8 C (91.0 F)
1984	30.6 C (87.1 F)
1985	33.9 C (93.0 F)
1986	30.0 C (86.0 F)
1987	37.8 C (100.0 F)
1988	30.6 C (87.1 F)
1989	30.0 C (86.0 F)
1990	28.9 C (84.0 F)

Coldest night (TNn)

The coldest night of the year at Zacatepec, 1945 to 1990. The record is -12.2 C (10.0 F) in 1976, marked on the chart; the median year is -5.0 C (23.0 F).

Coldest night (TNn) at Zacatepec by year
Year	Coldest night (TNn)
1945	0.0 C (32.0 F)
1946	0.0 C (32.0 F)
1947	0.0 C (32.0 F)
1948	0.0 C (32.0 F)
1949	0.0 C (32.0 F)
1950	0.0 C (32.0 F)
1951	0.0 C (32.0 F)
1957	-8.9 C (16.0 F)
1958	-2.2 C (28.0 F)
1959	-5.0 C (23.0 F)
1960	-5.0 C (23.0 F)
1962	-2.2 C (28.0 F)
1963	-8.3 C (17.1 F)
1964	-5.0 C (23.0 F)
1965	-9.4 C (15.1 F)
1966	-8.3 C (17.1 F)
1969	-5.0 C (23.0 F)
1970	-11.1 C (12.0 F)
1971	-5.0 C (23.0 F)
1972	-8.3 C (17.1 F)
1973	-11.1 C (12.0 F)
1974	-11.1 C (12.0 F)
1975	-8.3 C (17.1 F)
1976	-12.2 C (10.0 F)
1977	-4.4 C (24.1 F)
1978	-4.4 C (24.1 F)
1979	-6.1 C (21.0 F)
1980	-7.2 C (19.0 F)
1981	-5.0 C (23.0 F)
1982	-9.4 C (15.1 F)
1983	-5.0 C (23.0 F)
1984	-10.0 C (14.0 F)
1985	-5.0 C (23.0 F)
1986	-8.3 C (17.1 F)
1987	-4.4 C (24.1 F)
1988	-2.2 C (28.0 F)
1989	-8.3 C (17.1 F)
1990	0.6 C (33.1 F)

Wettest day (Rx1day)

The wettest day of the year at Zacatepec, 1945 to 1990. The record is 89.9 mm (3.5 in) in 1978, marked on the chart; the median year is 29.5 mm (1.2 in).

Wettest day (Rx1day) at Zacatepec by year
Year	Wettest day (Rx1day)
1945	30.2 mm (1.2 in)
1946	30.0 mm (1.2 in)
1947	8.9 mm (0.35 in)
1948	20.8 mm (0.8 in)
1949	19.8 mm (0.8 in)
1950	7.9 mm (0.31 in)
1951	9.9 mm (0.39 in)
1957	1.8 mm (0.07 in)
1958	50.0 mm (2.0 in)
1959	25.9 mm (1.0 in)
1960	30.0 mm (1.2 in)
1962	10.9 mm (0.4 in)
1963	33.8 mm (1.3 in)
1964	20.3 mm (0.8 in)
1965	27.7 mm (1.1 in)
1966	33.3 mm (1.3 in)
1969	31.8 mm (1.3 in)
1970	31.5 mm (1.2 in)
1971	31.0 mm (1.2 in)
1972	43.9 mm (1.7 in)
1973	29.0 mm (1.1 in)
1974	69.9 mm (2.8 in)
1975	21.8 mm (0.9 in)
1976	26.9 mm (1.1 in)
1977	38.9 mm (1.5 in)
1978	89.9 mm (3.5 in)
1979	38.4 mm (1.5 in)
1980	36.8 mm (1.4 in)
1981	44.5 mm (1.8 in)
1982	56.4 mm (2.2 in)
1983	21.8 mm (0.9 in)
1984	39.9 mm (1.6 in)
1985	30.5 mm (1.2 in)
1986	16.8 mm (0.7 in)
1987	23.4 mm (0.9 in)
1988	6.9 mm (0.27 in)
1989	0.0 mm (0.00 in)
1990	0.0 mm (0.00 in)

Wettest five days (Rx5day)

The wettest five days of the year at Zacatepec, 1945 to 1990. The record is 169.2 mm (6.7 in) in 1978, marked on the chart; the median year is 52.6 mm (2.1 in).

Wettest five days (Rx5day) at Zacatepec by year
Year	Wettest five days (Rx5day)
1945	45.5 mm (1.8 in)
1946	125.5 mm (4.9 in)
1947	27.5 mm (1.1 in)
1948	30.7 mm (1.2 in)
1949	29.7 mm (1.2 in)
1950	9.6 mm (0.38 in)
1951	17.5 mm (0.7 in)
1957	1.8 mm (0.07 in)
1958	68.4 mm (2.7 in)
1959	82.1 mm (3.2 in)
1960	120.5 mm (4.7 in)
1962	11.4 mm (0.4 in)
1963	48.1 mm (1.9 in)
1964	24.7 mm (1.0 in)
1965	34.3 mm (1.4 in)
1966	52.3 mm (2.1 in)
1969	69.5 mm (2.7 in)
1970	75.1 mm (3.0 in)
1971	49.3 mm (1.9 in)
1972	98.2 mm (3.9 in)
1973	52.8 mm (2.1 in)
1974	161.1 mm (6.3 in)
1975	59.2 mm (2.3 in)
1976	59.7 mm (2.4 in)
1977	59.5 mm (2.3 in)
1978	169.2 mm (6.7 in)
1979	93.0 mm (3.7 in)
1980	77.2 mm (3.0 in)
1981	120.7 mm (4.8 in)
1982	85.9 mm (3.4 in)
1983	50.5 mm (2.0 in)
1984	80.3 mm (3.2 in)
1985	56.1 mm (2.2 in)
1986	44.5 mm (1.8 in)
1987	47.4 mm (1.9 in)
1988	12.7 mm (0.5 in)
1989	0.0 mm (0.00 in)
1990	0.0 mm (0.00 in)

Longest dry spell (CDD)

The longest dry spell of the year at Zacatepec, 1945 to 1990. The record is 192 days in 1949, marked on the chart; the median year is 66 days.

Longest dry spell (CDD) at Zacatepec by year
Year	Longest dry spell (CDD)
1945	30 days
1946	78 days
1947	185 days
1948	70 days
1949	192 days
1950	170 days
1951	120 days
1957	41 days
1958	45 days
1959	65 days
1960	72 days
1962	11 days
1963	94 days
1964	82 days
1965	42 days
1966	35 days
1969	62 days
1970	82 days
1971	82 days
1972	70 days
1973	60 days
1974	63 days
1975	78 days
1976	58 days
1977	44 days
1978	44 days
1979	73 days
1980	70 days
1981	62 days
1982	59 days
1983	67 days
1984	43 days
1985	31 days
1986	97 days
1987	92 days
1988	129 days
1989	61 days
1990	31 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 Zacatepec standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Zacatepec 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).