Chacalapa Weather Records (MXN00012029)

Record envelope, standing records and threshold days for Chacalapa (MXN00012029), Mexico, with 46 years of record.

Key Facts for Chacalapa

Chacalapa (MXN00012029) is a weather station in Mexico at 16.70 latitude and -99.50 longitude, 20 m (65 ft) above sea level.
The station reports from 1967 to 2012, 46 years of record.
1,464 records set at Chacalapa still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Chacalapa tied a daily record low minimum temperature of 16.7 C (62.1 F) on 31 July 2012.

About the Station

Location: Mexico, 16.70 latitude, -99.50 longitude.
Elevation: 20 m (65 ft).
Period of record: 1967 to 2012, 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 Chacalapa. 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 Chacalapa, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	38.9 C (102.0 F)	10.0 C (50.0 F)	n/a	n/a
Feb	40.0 C (104.0 F)	10.0 C (50.0 F)	n/a	n/a
Mar	38.9 C (102.0 F)	10.6 C (51.1 F)	n/a	n/a
Apr	40.0 C (104.0 F)	13.3 C (55.9 F)	n/a	n/a
May	40.6 C (105.1 F)	10.0 C (50.0 F)	n/a	n/a
Jun	40.0 C (104.0 F)	13.9 C (57.0 F)	n/a	n/a
Jul	39.4 C (102.9 F)	16.1 C (61.0 F)	n/a	n/a
Aug	38.3 C (100.9 F)	16.1 C (61.0 F)	n/a	n/a
Sep	37.2 C (99.0 F)	16.7 C (62.1 F)	n/a	n/a
Oct	36.7 C (98.1 F)	15.0 C (59.0 F)	n/a	n/a
Nov	36.7 C (98.1 F)	10.0 C (50.0 F)	n/a	n/a
Dec	37.8 C (100.0 F)	11.1 C (52.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Chacalapa still stand. 1979 holds the most, with 93.

Standing records at Chacalapa by the year they were set
Year set	Standing records
1979	93
1980	87
1981	52
1982	36
1983	83
1984	50
1985	51
1986	57
1987	86
1988	43
1989	44
1990	54
1991	36
1992	64
1993	40
1994	25
1995	51
1996	25
1997	45
1998	48
1999	48
2000	35
2001	1
2002	30
2003	30
2004	6
2005	56
2006	49
2007	11
2008	13
2009	16
2010	49
2011	48
2012	2

Wettest Day of Each Month

Jun: 220.7 mm (8.7 in)

The wettest day on record for each calendar month at Chacalapa. The most was 220.7 mm (8.7 in) on 22 June 1973.

Record daily precipitation for each month at Chacalapa
Month	Record daily precipitation (mm)	Date
Jan	119.1 mm (4.7 in)	15 January 2010
Feb	44.5 mm (1.8 in)	25 February 1983
Mar	44.5 mm (1.8 in)	13 March 1983
Apr	35.3 mm (1.4 in)	5 April 1973
May	67.3 mm (2.6 in)	30 May 1978
Jun	220.7 mm (8.7 in)	22 June 1973
Jul	149.4 mm (5.9 in)	20 July 1979
Aug	142.0 mm (5.6 in)	23 August 1990
Sep	165.4 mm (6.5 in)	1 September 1973
Oct	199.9 mm (7.9 in)	8 October 1997
Nov	179.8 mm (7.1 in)	3 November 2002
Dec	36.3 mm (1.4 in)	24 December 2002

Period of Record Coverage

1979 to 2012

34 years of record at Chacalapa, 1979 to 2012. 10 years have data for under 90 percent of days and are left out of rankings: 2000, 2001, 2005, 2006, 2007, 2008, 2009, 2010 and others.

Days with data per year at Chacalapa
Year	Days with data	Share of year	Complete
1979	365	100%	Yes
1980	366	100%	Yes
1981	334	92%	Yes
1982	365	100%	Yes
1983	364	100%	Yes
1984	366	100%	Yes
1985	365	100%	Yes
1986	335	92%	Yes
1987	334	92%	Yes
1988	366	100%	Yes
1989	365	100%	Yes
1990	365	100%	Yes
1991	365	100%	Yes
1992	366	100%	Yes
1993	365	100%	Yes
1994	337	92%	Yes
1995	365	100%	Yes
1996	366	100%	Yes
1997	365	100%	Yes
1998	335	92%	Yes
1999	365	100%	Yes
2000	305	83%	No
2001	120	33%	No
2002	334	92%	Yes
2003	365	100%	Yes
2004	366	100%	Yes
2005	253	69%	No
2006	301	82%	No
2007	219	60%	No
2008	154	42%	No
2009	193	53%	No
2010	322	88%	No
2011	258	71%	No
2012	193	53%	No

Latest Records

Latest records at Chacalapa
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
31 July 2012	Chacalapa, MX	daily low min (Tie)	16.7 C (62.1 F)	tie	12 years	1 of 100 (Routine)
30 July 2012	Chacalapa, MX	daily low min (Tie)	16.7 C (62.1 F)	tie	7 years	1 of 100 (Routine)
26 July 2012	Chacalapa, MX	daily low min (Tie)	16.7 C (62.1 F)	tie	2 years	0 of 100 (Routine)
24 July 2012	Chacalapa, MX	daily low min (Tie)	16.7 C (62.1 F)	tie	7 years	1 of 100 (Routine)
23 July 2012	Chacalapa, MX	daily low min (Tie)	16.7 C (62.1 F)	tie	7 years	1 of 100 (Routine)
22 July 2012	Chacalapa, MX	daily low min (Tie)	16.7 C (62.1 F)	tie	7 years	1 of 100 (Routine)
21 July 2012	Chacalapa, MX	daily low min (Tie)	16.7 C (62.1 F)	tie	7 years	1 of 100 (Routine)
20 July 2012	Chacalapa, MX	daily high max (Tie)	36.7 C (98.1 F)	tie	5 years	1 of 100 (Routine)
20 July 2012	Chacalapa, MX	daily low min (Tie)	16.7 C (62.1 F)	tie	2 years	0 of 100 (Routine)
19 July 2012	Chacalapa, MX	daily low min (Tie)	16.7 C (62.1 F)	tie	2 years	0 of 100 (Routine)
18 July 2012	Chacalapa, MX	daily low min (Tie)	16.7 C (62.1 F)	tie	2 years	0 of 100 (Routine)
17 July 2012	Chacalapa, MX	daily high max (Tie)	35.6 C (96.1 F)	tie	24 years	2 of 100 (Routine)
17 July 2012	Chacalapa, MX	daily low min (Tie)	17.8 C (64.0 F)	tie	7 years	1 of 100 (Routine)
16 July 2012	Chacalapa, MX	daily low min (Tie)	16.7 C (62.1 F)	tie	7 years	1 of 100 (Routine)
14 July 2012	Chacalapa, MX	daily low min (Tie)	16.7 C (62.1 F)	tie	7 years	1 of 100 (Routine)
13 July 2012	Chacalapa, MX	daily low min (Tie)	16.7 C (62.1 F)	tie	7 years	1 of 100 (Routine)
11 July 2012	Chacalapa, MX	daily high max (Tie)	36.7 C (98.1 F)	tie	5 years	1 of 100 (Routine)
11 July 2012	Chacalapa, MX	daily low min (Tie)	16.7 C (62.1 F)	tie	7 years	1 of 100 (Routine)
10 July 2012	Chacalapa, MX	daily low min (Tie)	16.7 C (62.1 F)	tie	7 years	1 of 100 (Routine)
9 July 2012	Chacalapa, MX	daily low min (Tie)	16.7 C (62.1 F)	tie	7 years	1 of 100 (Routine)

Climate Trend

18 complete years, 1979 to 2004

One stripe for each of 18 complete years at Chacalapa, 1979 to 2004. Blue stripes are years cooler than the station's own mean of 26.3 C (79.4 F); red stripes are warmer. The coolest year was 1979, at 25.6 C (78.0 F), and the warmest was 1988, at 26.9 C (80.4 F). The strongest colour marks a difference of 0.8 C (1.4 F).

Annual mean temperature at Chacalapa as warming stripes, 1979 to 2004
Year	Annual mean temperature	Difference from the station mean
1979	25.6 C	-0.73 C
1980	26.3 C	0.00 C
1982	26.3 C	-0.06 C
1983	26.0 C	-0.36 C
1984	25.9 C	-0.40 C
1985	26.1 C	-0.21 C
1988	26.9 C	+0.60 C
1989	26.8 C	+0.47 C
1990	26.8 C	+0.50 C
1991	26.5 C	+0.20 C
1992	26.0 C	-0.30 C
1993	26.6 C	+0.27 C
1995	26.7 C	+0.43 C
1996	26.2 C	-0.14 C
1997	26.7 C	+0.41 C
1999	25.9 C	-0.46 C
2003	26.0 C	-0.35 C
2004	26.5 C	+0.17 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

1967 to 2012

Yearly extremes at Chacalapa: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	40.6 C (105.1 F)	1998	38.6 C (101.5 F)	34
Coldest night (TNn)	10.0 C (50.0 F)	1979	12.8 C (55.0 F)	34
Wettest day (Rx1day)	220.7 mm (8.7 in)	1973	99.3 mm (3.9 in)	46
Wettest five days (Rx5day)	379.2 mm (14.9 in)	1973	198.9 mm (7.8 in)	46
Longest dry spell (CDD)	174 days	1987	128 days	46

Hottest day (TXx)

The hottest day of the year at Chacalapa, 1967 to 2012. The record is 40.6 C (105.1 F) in 1998, marked on the chart; the median year is 38.6 C (101.5 F).

Hottest day (TXx) at Chacalapa by year
Year	Hottest day (TXx)
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
1978	n/a
1979	37.8 C (100.0 F)
1980	39.4 C (102.9 F)
1981	38.3 C (100.9 F)
1982	38.3 C (100.9 F)
1983	38.9 C (102.0 F)
1984	37.8 C (100.0 F)
1985	38.9 C (102.0 F)
1986	37.8 C (100.0 F)
1987	36.7 C (98.1 F)
1988	37.8 C (100.0 F)
1989	38.9 C (102.0 F)
1990	38.9 C (102.0 F)
1991	38.9 C (102.0 F)
1992	38.9 C (102.0 F)
1993	40.0 C (104.0 F)
1994	38.9 C (102.0 F)
1995	39.4 C (102.9 F)
1996	38.9 C (102.0 F)
1997	39.4 C (102.9 F)
1998	40.6 C (105.1 F)
1999	40.0 C (104.0 F)
2000	37.2 C (99.0 F)
2001	37.8 C (100.0 F)
2002	40.0 C (104.0 F)
2003	37.8 C (100.0 F)
2004	38.3 C (100.9 F)
2005	38.3 C (100.9 F)
2006	38.9 C (102.0 F)
2007	37.8 C (100.0 F)
2008	37.8 C (100.0 F)
2009	36.7 C (98.1 F)
2010	37.8 C (100.0 F)
2011	40.0 C (104.0 F)
2012	36.7 C (98.1 F)

Coldest night (TNn)

The coldest night of the year at Chacalapa, 1967 to 2012. The record is 10.0 C (50.0 F) in 1979, marked on the chart; the median year is 12.8 C (55.0 F).

Coldest night (TNn) at Chacalapa by year
Year	Coldest night (TNn)
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
1978	n/a
1979	10.0 C (50.0 F)
1980	12.2 C (54.0 F)
1981	11.1 C (52.0 F)
1982	11.7 C (53.1 F)
1983	10.6 C (51.1 F)
1984	10.6 C (51.1 F)
1985	12.8 C (55.0 F)
1986	12.8 C (55.0 F)
1987	15.6 C (60.1 F)
1988	16.7 C (62.1 F)
1989	15.6 C (60.1 F)
1990	13.9 C (57.0 F)
1991	10.6 C (51.1 F)
1992	10.0 C (50.0 F)
1993	12.8 C (55.0 F)
1994	15.0 C (59.0 F)
1995	13.9 C (57.0 F)
1996	10.6 C (51.1 F)
1997	10.6 C (51.1 F)
1998	10.6 C (51.1 F)
1999	10.0 C (50.0 F)
2000	11.7 C (53.1 F)
2001	13.9 C (57.0 F)
2002	10.0 C (50.0 F)
2003	11.7 C (53.1 F)
2004	12.8 C (55.0 F)
2005	15.0 C (59.0 F)
2006	13.3 C (55.9 F)
2007	13.9 C (57.0 F)
2008	16.7 C (62.1 F)
2009	16.7 C (62.1 F)
2010	16.7 C (62.1 F)
2011	16.1 C (61.0 F)
2012	16.7 C (62.1 F)

Wettest day (Rx1day)

The wettest day of the year at Chacalapa, 1967 to 2012. The record is 220.7 mm (8.7 in) in 1973, marked on the chart; the median year is 99.3 mm (3.9 in).

Wettest day (Rx1day) at Chacalapa by year
Year	Wettest day (Rx1day)
1967	100.3 mm (3.9 in)
1968	93.5 mm (3.7 in)
1969	118.1 mm (4.6 in)
1970	79.0 mm (3.1 in)
1971	112.8 mm (4.4 in)
1972	108.5 mm (4.3 in)
1973	220.7 mm (8.7 in)
1974	80.3 mm (3.2 in)
1975	91.2 mm (3.6 in)
1976	166.9 mm (6.6 in)
1977	71.9 mm (2.8 in)
1978	83.8 mm (3.3 in)
1979	149.4 mm (5.9 in)
1980	72.6 mm (2.9 in)
1981	100.3 mm (3.9 in)
1982	52.3 mm (2.1 in)
1983	103.9 mm (4.1 in)
1984	151.4 mm (6.0 in)
1985	111.8 mm (4.4 in)
1986	23.9 mm (0.9 in)
1987	79.8 mm (3.1 in)
1988	127.8 mm (5.0 in)
1989	119.9 mm (4.7 in)
1990	142.0 mm (5.6 in)
1991	167.4 mm (6.6 in)
1992	74.9 mm (2.9 in)
1993	122.9 mm (4.8 in)
1994	88.1 mm (3.5 in)
1995	120.1 mm (4.7 in)
1996	91.9 mm (3.6 in)
1997	199.9 mm (7.9 in)
1998	143.3 mm (5.6 in)
1999	132.1 mm (5.2 in)
2000	62.7 mm (2.5 in)
2001	41.1 mm (1.6 in)
2002	179.8 mm (7.1 in)
2003	95.8 mm (3.8 in)
2004	80.8 mm (3.2 in)
2005	84.3 mm (3.3 in)
2006	95.0 mm (3.7 in)
2007	54.9 mm (2.2 in)
2008	63.0 mm (2.5 in)
2009	57.9 mm (2.3 in)
2010	120.1 mm (4.7 in)
2011	98.3 mm (3.9 in)
2012	142.0 mm (5.6 in)

Wettest five days (Rx5day)

The wettest five days of the year at Chacalapa, 1967 to 2012. The record is 379.2 mm (14.9 in) in 1973, marked on the chart; the median year is 198.9 mm (7.8 in).

Wettest five days (Rx5day) at Chacalapa by year
Year	Wettest five days (Rx5day)
1967	250.9 mm (9.9 in)
1968	235.9 mm (9.3 in)
1969	232.8 mm (9.2 in)
1970	185.7 mm (7.3 in)
1971	167.6 mm (6.6 in)
1972	282.7 mm (11.1 in)
1973	379.2 mm (14.9 in)
1974	120.0 mm (4.7 in)
1975	205.5 mm (8.1 in)
1976	261.4 mm (10.3 in)
1977	148.3 mm (5.8 in)
1978	159.7 mm (6.3 in)
1979	234.6 mm (9.2 in)
1980	110.0 mm (4.3 in)
1981	218.5 mm (8.6 in)
1982	104.2 mm (4.1 in)
1983	134.4 mm (5.3 in)
1984	316.1 mm (12.4 in)
1985	178.1 mm (7.0 in)
1986	90.4 mm (3.6 in)
1987	116.4 mm (4.6 in)
1988	245.6 mm (9.7 in)
1989	279.6 mm (11.0 in)
1990	182.4 mm (7.2 in)
1991	269.8 mm (10.6 in)
1992	152.5 mm (6.0 in)
1993	238.8 mm (9.4 in)
1994	165.4 mm (6.5 in)
1995	260.3 mm (10.2 in)
1996	246.1 mm (9.7 in)
1997	239.6 mm (9.4 in)
1998	211.4 mm (8.3 in)
1999	251.5 mm (9.9 in)
2000	194.5 mm (7.7 in)
2001	48.2 mm (1.9 in)
2002	279.9 mm (11.0 in)
2003	163.6 mm (6.4 in)
2004	162.4 mm (6.4 in)
2005	154.4 mm (6.1 in)
2006	234.4 mm (9.2 in)
2007	100.1 mm (3.9 in)
2008	151.7 mm (6.0 in)
2009	195.6 mm (7.7 in)
2010	322.8 mm (12.7 in)
2011	186.8 mm (7.4 in)
2012	202.2 mm (8.0 in)

Longest dry spell (CDD)

The longest dry spell of the year at Chacalapa, 1967 to 2012. The record is 174 days in 1987, marked on the chart; the median year is 128 days.

Longest dry spell (CDD) at Chacalapa by year
Year	Longest dry spell (CDD)
1967	58 days
1968	40 days
1969	150 days
1970	153 days
1971	142 days
1972	146 days
1973	94 days
1974	137 days
1975	129 days
1976	138 days
1977	122 days
1978	90 days
1979	97 days
1980	116 days
1981	85 days
1982	138 days
1983	71 days
1984	140 days
1985	105 days
1986	143 days
1987	174 days
1988	159 days
1989	140 days
1990	125 days
1991	127 days
1992	98 days
1993	158 days
1994	124 days
1995	81 days
1996	136 days
1997	77 days
1998	151 days
1999	157 days
2000	142 days
2001	59 days
2002	84 days
2003	151 days
2004	125 days
2005	66 days
2006	136 days
2007	94 days
2008	139 days
2009	90 days
2010	113 days
2011	161 days
2012	135 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

41 years, 1968 to 2011

A day with at least 102.7 mm (4.0 in) of rain is expected about once in 2 years. A day with at least 232.4 mm (9.1 in) of rain is expected about once in 100 years.

Rainfall return levels at Chacalapa: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	102.7 mm (4.0 in)
5 years	140.2 mm (5.5 in)
10 years	163.8 mm (6.4 in)
25 years	192.5 mm (7.6 in)
50 years	212.9 mm (8.4 in)	Longer than the 41 years of record
100 years	232.4 mm (9.1 in)	Longer than the 41 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, 41 years of values from 1968 to 2011.

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: 220.7 mm (8.7 in) in 1973; 199.9 mm (7.9 in) in 1997; 179.8 mm (7.1 in) in 2002.

Download the Data

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