Cacaloapan Weather Records (MXN00021033)

Record envelope, standing records and threshold days for Cacaloapan (MXN00021033), Mexico, with 44 years of record.

Key Facts for Cacaloapan

Cacaloapan (MXN00021033) is a weather station in Mexico at 18.57 latitude and -97.58 longitude, 1,860 m (6,102 ft) above sea level.
The station reports from 1951 to 1994, 44 years of record.
1,464 records set at Cacaloapan still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Cacaloapan set a daily record high maximum temperature of 31.7 C (89.1 F) on 30 October 1994.

About the Station

Location: Mexico, 18.57 latitude, -97.58 longitude.
Elevation: 1,860 m (6,102 ft).
Period of record: 1951 to 1994, 44 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 Cacaloapan. 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 Cacaloapan, 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)	-6.1 C (21.0 F)	n/a	n/a
Feb	31.7 C (89.1 F)	-1.7 C (28.9 F)	n/a	n/a
Mar	35.6 C (96.1 F)	1.7 C (35.1 F)	n/a	n/a
Apr	36.7 C (98.1 F)	1.7 C (35.1 F)	n/a	n/a
May	36.7 C (98.1 F)	5.0 C (41.0 F)	n/a	n/a
Jun	35.6 C (96.1 F)	2.8 C (37.0 F)	n/a	n/a
Jul	32.8 C (91.0 F)	2.2 C (36.0 F)	n/a	n/a
Aug	32.8 C (91.0 F)	5.6 C (42.1 F)	n/a	n/a
Sep	30.6 C (87.1 F)	5.0 C (41.0 F)	n/a	n/a
Oct	33.9 C (93.0 F)	0.6 C (33.1 F)	n/a	n/a
Nov	30.6 C (87.1 F)	-0.6 C (30.9 F)	n/a	n/a
Dec	30.0 C (86.0 F)	-3.9 C (25.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Cacaloapan still stand. 1956 holds the most, with 84.

Standing records at Cacaloapan by the year they were set
Year set	Standing records
1951	6
1952	65
1953	52
1954	47
1955	61
1956	84
1957	53
1958	64
1959	34
1960	40
1963	38
1964	35
1965	30
1966	13
1967	9
1968	27
1969	48
1970	32
1971	26
1972	28
1973	45
1974	30
1975	26
1976	22
1977	28
1978	22
1979	43
1980	28
1981	18
1982	19
1983	32
1984	30
1985	19
1986	22
1987	34
1988	24
1989	33
1990	20
1991	62
1992	20
1993	58
1994	37

All-Time Record Progression

1 new records

1 all-time records were set at Cacaloapan between 26 April 1986 and 26 April 1986. Each dot is a new record.

Wettest Day of Each Month

Jul: 91.9 mm (3.6 in)

The wettest day on record for each calendar month at Cacaloapan. The most was 91.9 mm (3.6 in) on 3 July 1974.

Record daily precipitation for each month at Cacaloapan
Month	Record daily precipitation (mm)	Date
Jan	33.3 mm (1.3 in)	19 January 1958
Feb	26.2 mm (1.0 in)	21 February 1966
Mar	30.0 mm (1.2 in)	5 March 1968
Apr	36.6 mm (1.4 in)	19 April 1957
May	64.8 mm (2.6 in)	16 May 1958
Jun	86.1 mm (3.4 in)	15 June 1974
Jul	91.9 mm (3.6 in)	3 July 1974
Aug	56.9 mm (2.2 in)	31 August 1994
Sep	88.1 mm (3.5 in)	19 September 1984
Oct	40.4 mm (1.6 in)	10 October 1991
Nov	30.0 mm (1.2 in)	8 November 1958
Dec	20.1 mm (0.8 in)	13 December 1958

Period of Record Coverage

1951 to 1994

42 years of record at Cacaloapan, 1951 to 1994. 5 years have data for under 90 percent of days and are left out of rankings: 1951, 1966, 1988, 1989, 1994.

Days with data per year at Cacaloapan
Year	Days with data	Share of year	Complete
1951	31	8%	No
1952	366	100%	Yes
1953	365	100%	Yes
1954	365	100%	Yes
1955	365	100%	Yes
1956	364	99%	Yes
1957	365	100%	Yes
1958	337	92%	Yes
1959	335	92%	Yes
1960	366	100%	Yes
1963	365	100%	Yes
1964	365	100%	Yes
1965	364	100%	Yes
1966	211	58%	No
1967	365	100%	Yes
1968	366	100%	Yes
1969	364	100%	Yes
1970	365	100%	Yes
1971	365	100%	Yes
1972	366	100%	Yes
1973	364	100%	Yes
1974	364	100%	Yes
1975	365	100%	Yes
1976	365	100%	Yes
1977	364	100%	Yes
1978	365	100%	Yes
1979	365	100%	Yes
1980	366	100%	Yes
1981	365	100%	Yes
1982	365	100%	Yes
1983	365	100%	Yes
1984	366	100%	Yes
1985	335	92%	Yes
1986	365	100%	Yes
1987	334	92%	Yes
1988	275	75%	No
1989	304	83%	No
1990	333	91%	Yes
1991	350	96%	Yes
1992	366	100%	Yes
1993	334	92%	Yes
1994	215	59%	No

Latest Records

Latest records at Cacaloapan
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
30 October 1994	Cacaloapan, MX	daily high max	31.7 C (89.1 F)	2.8 C (5.0 F)	24 years	21 of 100 (Routine)
27 October 1994	Cacaloapan, MX	daily high max	30.0 C (86.0 F)	1.1 C (2.0 F)	16 years	13 of 100 (Routine)
25 October 1994	Cacaloapan, MX	daily high max	30.0 C (86.0 F)	1.1 C (2.0 F)	37 years	19 of 100 (Routine)
24 October 1994	Cacaloapan, MX	monthly high max (Tie)	33.9 C (93.0 F)	tie	0 years	3 of 100 (Routine)
23 October 1994	Cacaloapan, MX	daily high max (Tie)	30.0 C (86.0 F)	tie	24 years	2 of 100 (Routine)
22 October 1994	Cacaloapan, MX	monthly high max	33.9 C (93.0 F)	2.2 C (4.0 F)	15 years	26 of 100 (Routine)
21 October 1994	Cacaloapan, MX	daily high max	30.0 C (86.0 F)	2.2 C (4.0 F)	36 years	22 of 100 (Routine)
19 October 1994	Cacaloapan, MX	monthly high max (Tie)	31.7 C (89.1 F)	tie	15 years	4 of 100 (Routine)
18 October 1994	Cacaloapan, MX	monthly high max (Tie)	31.7 C (89.1 F)	tie	15 years	4 of 100 (Routine)
17 October 1994	Cacaloapan, MX	monthly high max (Tie)	31.7 C (89.1 F)	tie	15 years	4 of 100 (Routine)
15 October 1994	Cacaloapan, MX	daily high max (Tie)	30.0 C (86.0 F)	tie	0 years	1 of 100 (Routine)
14 October 1994	Cacaloapan, MX	monthly high max (Tie)	31.7 C (89.1 F)	tie	15 years	4 of 100 (Routine)
13 October 1994	Cacaloapan, MX	monthly high max (Tie)	31.7 C (89.1 F)	tie	15 years	4 of 100 (Routine)
11 October 1994	Cacaloapan, MX	monthly high max (Tie)	31.7 C (89.1 F)	tie	15 years	4 of 100 (Routine)
5 October 1994	Cacaloapan, MX	daily rain	17.8 mm (0.7 in)	12.0 mm (0.5 in)	24 years	20 of 100 (Routine)
4 October 1994	Cacaloapan, MX	daily rain	18.8 mm (0.7 in)	1.5 mm (0.06 in)	40 years	17 of 100 (Routine)
4 October 1994	Cacaloapan, MX	daily high max	30.0 C (86.0 F)	1.1 C (2.0 F)	24 years	15 of 100 (Routine)
2 October 1994	Cacaloapan, MX	daily rain	31.8 mm (1.3 in)	17.8 mm (0.7 in)	1 year	23 of 100 (Routine)
2 October 1994	Cacaloapan, MX	daily high max (Tie)	27.8 C (82.0 F)	tie	17 years	2 of 100 (Routine)
1 October 1994	Cacaloapan, MX	daily rain	19.8 mm (0.8 in)	3.0 mm (0.12 in)	29 years	15 of 100 (Routine)

Climate Trend

31 complete years, 1952 to 1992

One stripe for each of 31 complete years at Cacaloapan, 1952 to 1992. Blue stripes are years cooler than the station's own mean of 17.4 C (63.3 F); red stripes are warmer. The coolest year was 1984, at 16.4 C (61.5 F), and the warmest was 1969, at 18.5 C (65.4 F). The strongest colour marks a difference of 1.2 C (2.2 F).

Annual mean temperature at Cacaloapan as warming stripes, 1952 to 1992
Year	Annual mean temperature	Difference from the station mean
1952	17.7 C	+0.26 C
1953	17.5 C	+0.08 C
1954	16.9 C	-0.46 C
1955	17.4 C	+0.01 C
1956	16.6 C	-0.75 C
1957	17.9 C	+0.54 C
1960	17.8 C	+0.41 C
1963	17.8 C	+0.37 C
1964	17.8 C	+0.40 C
1965	17.7 C	+0.28 C
1967	17.5 C	+0.10 C
1968	17.3 C	-0.07 C
1969	18.5 C	+1.14 C
1970	18.0 C	+0.58 C
1971	17.6 C	+0.18 C
1972	17.6 C	+0.22 C
1973	17.1 C	-0.26 C
1974	17.1 C	-0.31 C
1975	17.2 C	-0.18 C
1976	16.8 C	-0.55 C
1977	17.7 C	+0.34 C
1978	17.7 C	+0.26 C
1979	17.5 C	+0.14 C
1980	17.4 C	-0.02 C
1981	16.7 C	-0.65 C
1982	17.2 C	-0.24 C
1983	17.1 C	-0.27 C
1984	16.4 C	-1.00 C
1986	16.9 C	-0.47 C
1991	17.7 C	+0.28 C
1992	17.1 C	-0.27 C

The fitted trend in annual mean temperature here over 1952 to 1992 is -0.11 C (-0.25 to 0.03) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.2 F (-0.5 to 0.1) per decade. The slope is a straight line fitted to 31 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Cacaloapan
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	-0.11 C (-0.25 to 0.03) per decade	-0.2 F (-0.5 to 0.1) per decade	1952 to 1992	31	Not clearly different from zero
Mean daily maximum	0.01 C (-0.19 to 0.20) per decade	0.01 F (-0.34 to 0.36) per decade	1952 to 1992	31	Not clearly different from zero
Mean daily minimum	-0.2 C (-0.4 to -0.1) per decade	-0.4 F (-0.7 to -0.1) per decade	1952 to 1992	31	Fall

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

1951 to 1994

Yearly extremes at Cacaloapan: 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)	1986	33.9 C (93.0 F)	42
Coldest night (TNn)	-6.1 C (21.0 F)	1953	0.6 C (33.1 F)	42
Wettest day (Rx1day)	91.9 mm (3.6 in)	1974	44.0 mm (1.7 in)	42
Wettest five days (Rx5day)	186.6 mm (7.3 in)	1992	88.0 mm (3.5 in)	42
Longest dry spell (CDD)	118 days	1993	71 days	42

Hottest day (TXx)

The hottest day of the year at Cacaloapan, 1951 to 1994. The record is 36.7 C (98.1 F) in 1986, marked on the chart; the median year is 33.9 C (93.0 F).

Hottest day (TXx) at Cacaloapan by year
Year	Hottest day (TXx)
1951	30.0 C (86.0 F)
1952	34.4 C (93.9 F)
1953	35.0 C (95.0 F)
1954	35.0 C (95.0 F)
1955	35.0 C (95.0 F)
1956	34.4 C (93.9 F)
1957	32.2 C (90.0 F)
1958	32.8 C (91.0 F)
1959	31.7 C (89.1 F)
1960	33.9 C (93.0 F)
1963	33.3 C (91.9 F)
1964	35.0 C (95.0 F)
1965	32.8 C (91.0 F)
1966	30.0 C (86.0 F)
1967	33.9 C (93.0 F)
1968	31.7 C (89.1 F)
1969	35.6 C (96.1 F)
1970	35.0 C (95.0 F)
1971	35.6 C (96.1 F)
1972	35.0 C (95.0 F)
1973	35.6 C (96.1 F)
1974	35.0 C (95.0 F)
1975	33.9 C (93.0 F)
1976	32.8 C (91.0 F)
1977	35.0 C (95.0 F)
1978	35.6 C (96.1 F)
1979	35.0 C (95.0 F)
1980	35.0 C (95.0 F)
1981	35.0 C (95.0 F)
1982	33.9 C (93.0 F)
1983	35.0 C (95.0 F)
1984	33.9 C (93.0 F)
1985	32.8 C (91.0 F)
1986	36.7 C (98.1 F)
1987	31.7 C (89.1 F)
1988	31.7 C (89.1 F)
1989	31.7 C (89.1 F)
1990	32.8 C (91.0 F)
1991	36.7 C (98.1 F)
1992	30.6 C (87.1 F)
1993	32.8 C (91.0 F)
1994	33.9 C (93.0 F)

Coldest night (TNn)

The coldest night of the year at Cacaloapan, 1951 to 1994. The record is -6.1 C (21.0 F) in 1953, marked on the chart; the median year is 0.6 C (33.1 F).

Coldest night (TNn) at Cacaloapan by year
Year	Coldest night (TNn)
1951	-2.2 C (28.0 F)
1952	-1.7 C (28.9 F)
1953	-6.1 C (21.0 F)
1954	-5.0 C (23.0 F)
1955	0.0 C (32.0 F)
1956	-2.2 C (28.0 F)
1957	-2.2 C (28.0 F)
1958	1.7 C (35.1 F)
1959	3.3 C (37.9 F)
1960	-1.1 C (30.0 F)
1963	-2.8 C (27.0 F)
1964	0.6 C (33.1 F)
1965	2.8 C (37.0 F)
1966	-1.1 C (30.0 F)
1967	-1.1 C (30.0 F)
1968	0.6 C (33.1 F)
1969	2.8 C (37.0 F)
1970	1.7 C (35.1 F)
1971	0.6 C (33.1 F)
1972	1.7 C (35.1 F)
1973	1.1 C (34.0 F)
1974	1.7 C (35.1 F)
1975	0.6 C (33.1 F)
1976	0.0 C (32.0 F)
1977	0.6 C (33.1 F)
1978	3.9 C (39.0 F)
1979	-1.1 C (30.0 F)
1980	2.8 C (37.0 F)
1981	0.6 C (33.1 F)
1982	1.7 C (35.1 F)
1983	0.0 C (32.0 F)
1984	0.0 C (32.0 F)
1985	0.0 C (32.0 F)
1986	1.7 C (35.1 F)
1987	0.6 C (33.1 F)
1988	0.0 C (32.0 F)
1989	0.0 C (32.0 F)
1990	0.6 C (33.1 F)
1991	0.6 C (33.1 F)
1992	2.8 C (37.0 F)
1993	0.0 C (32.0 F)
1994	1.7 C (35.1 F)

Wettest day (Rx1day)

The wettest day of the year at Cacaloapan, 1951 to 1994. The record is 91.9 mm (3.6 in) in 1974, marked on the chart; the median year is 44.0 mm (1.7 in).

Wettest day (Rx1day) at Cacaloapan by year
Year	Wettest day (Rx1day)
1951	0.8 mm (0.03 in)
1952	45.0 mm (1.8 in)
1953	45.5 mm (1.8 in)
1954	36.8 mm (1.4 in)
1955	63.8 mm (2.5 in)
1956	32.3 mm (1.3 in)
1957	36.6 mm (1.4 in)
1958	64.8 mm (2.6 in)
1959	27.4 mm (1.1 in)
1960	35.8 mm (1.4 in)
1963	32.8 mm (1.3 in)
1964	37.8 mm (1.5 in)
1965	28.4 mm (1.1 in)
1966	61.0 mm (2.4 in)
1967	39.9 mm (1.6 in)
1968	59.9 mm (2.4 in)
1969	52.8 mm (2.1 in)
1970	40.9 mm (1.6 in)
1971	31.0 mm (1.2 in)
1972	36.1 mm (1.4 in)
1973	59.9 mm (2.4 in)
1974	91.9 mm (3.6 in)
1975	42.9 mm (1.7 in)
1976	40.9 mm (1.6 in)
1977	52.8 mm (2.1 in)
1978	24.9 mm (1.0 in)
1979	51.8 mm (2.0 in)
1980	54.6 mm (2.1 in)
1981	63.8 mm (2.5 in)
1982	57.2 mm (2.3 in)
1983	34.3 mm (1.4 in)
1984	88.1 mm (3.5 in)
1985	37.6 mm (1.5 in)
1986	32.3 mm (1.3 in)
1987	25.9 mm (1.0 in)
1988	56.1 mm (2.2 in)
1989	17.3 mm (0.7 in)
1990	70.4 mm (2.8 in)
1991	45.0 mm (1.8 in)
1992	55.4 mm (2.2 in)
1993	45.0 mm (1.8 in)
1994	56.9 mm (2.2 in)

Wettest five days (Rx5day)

The wettest five days of the year at Cacaloapan, 1951 to 1994. The record is 186.6 mm (7.3 in) in 1992, marked on the chart; the median year is 88.0 mm (3.5 in).

Wettest five days (Rx5day) at Cacaloapan by year
Year	Wettest five days (Rx5day)
1951	0.8 mm (0.03 in)
1952	70.8 mm (2.8 in)
1953	48.1 mm (1.9 in)
1954	77.4 mm (3.0 in)
1955	125.4 mm (4.9 in)
1956	53.1 mm (2.1 in)
1957	67.1 mm (2.6 in)
1958	145.4 mm (5.7 in)
1959	73.6 mm (2.9 in)
1960	49.1 mm (1.9 in)
1963	54.6 mm (2.1 in)
1964	62.2 mm (2.4 in)
1965	39.6 mm (1.6 in)
1966	99.9 mm (3.9 in)
1967	95.3 mm (3.8 in)
1968	96.5 mm (3.8 in)
1969	170.1 mm (6.7 in)
1970	86.2 mm (3.4 in)
1971	64.6 mm (2.5 in)
1972	89.7 mm (3.5 in)
1973	173.1 mm (6.8 in)
1974	164.5 mm (6.5 in)
1975	103.1 mm (4.1 in)
1976	81.3 mm (3.2 in)
1977	63.5 mm (2.5 in)
1978	65.3 mm (2.6 in)
1979	126.3 mm (5.0 in)
1980	134.4 mm (5.3 in)
1981	76.0 mm (3.0 in)
1982	100.4 mm (4.0 in)
1983	72.3 mm (2.8 in)
1984	163.1 mm (6.4 in)
1985	96.8 mm (3.8 in)
1986	56.9 mm (2.2 in)
1987	49.6 mm (2.0 in)
1988	104.4 mm (4.1 in)
1989	23.1 mm (0.9 in)
1990	98.8 mm (3.9 in)
1991	148.4 mm (5.8 in)
1992	186.6 mm (7.3 in)
1993	170.7 mm (6.7 in)
1994	113.1 mm (4.5 in)

Longest dry spell (CDD)

The longest dry spell of the year at Cacaloapan, 1951 to 1994. The record is 118 days in 1993, marked on the chart; the median year is 71 days.

Longest dry spell (CDD) at Cacaloapan by year
Year	Longest dry spell (CDD)
1951	31 days
1952	96 days
1953	69 days
1954	50 days
1955	83 days
1956	111 days
1957	52 days
1958	48 days
1959	99 days
1960	100 days
1963	95 days
1964	101 days
1965	27 days
1966	46 days
1967	62 days
1968	35 days
1969	72 days
1970	95 days
1971	91 days
1972	39 days
1973	57 days
1974	54 days
1975	117 days
1976	58 days
1977	81 days
1978	59 days
1979	63 days
1980	70 days
1981	101 days
1982	58 days
1983	73 days
1984	98 days
1985	98 days
1986	58 days
1987	95 days
1988	89 days
1989	82 days
1990	79 days
1991	70 days
1992	62 days
1993	118 days
1994	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.

Rainfall Return Levels

37 years, 1952 to 1993

A day with at least 43.3 mm (1.7 in) of rain is expected about once in 2 years. A day with at least 102.8 mm (4.0 in) of rain is expected about once in 100 years.

Rainfall return levels at Cacaloapan: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	43.3 mm (1.7 in)
5 years	57.7 mm (2.3 in)
10 years	67.8 mm (2.7 in)
25 years	81.3 mm (3.2 in)
50 years	91.9 mm (3.6 in)	Longer than the 37 years of record
100 years	102.8 mm (4.0 in)	Longer than the 37 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 37 years of values from 1952 to 1993.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 91.9 mm (3.6 in) in 1974; 88.1 mm (3.5 in) in 1984; 70.4 mm (2.8 in) in 1990.

Download the Data

Data for Cacaloapan standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Cacaloapan 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).