Chapalacana Weather Records (MXN00018063)

Record envelope, standing records and threshold days for Chapalacana (MXN00018063), Mexico, with 33 years of record.

Key Facts for Chapalacana

Chapalacana (MXN00018063) is a weather station in Mexico at 21.93 latitude and -104.50 longitude, 277 m (908 ft) above sea level.
The station reports from 1975 to 2007, 33 years of record.
1,464 records set at Chapalacana still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.

About the Station

Location: Mexico, 21.93 latitude, -104.50 longitude.
Elevation: 277 m (908 ft).
Period of record: 1975 to 2007, 33 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 Chapalacana. 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 Chapalacana, 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)	5.6 C (42.1 F)	n/a	n/a
Feb	40.6 C (105.1 F)	7.8 C (46.0 F)	n/a	n/a
Mar	43.9 C (111.0 F)	8.9 C (48.0 F)	n/a	n/a
Apr	46.1 C (115.0 F)	12.2 C (54.0 F)	n/a	n/a
May	45.6 C (114.1 F)	14.4 C (57.9 F)	n/a	n/a
Jun	47.2 C (117.0 F)	18.3 C (64.9 F)	n/a	n/a
Jul	45.0 C (113.0 F)	15.0 C (59.0 F)	n/a	n/a
Aug	40.0 C (104.0 F)	19.4 C (66.9 F)	n/a	n/a
Sep	41.7 C (107.1 F)	15.0 C (59.0 F)	n/a	n/a
Oct	40.6 C (105.1 F)	12.8 C (55.0 F)	n/a	n/a
Nov	42.2 C (108.0 F)	8.9 C (48.0 F)	n/a	n/a
Dec	38.9 C (102.0 F)	5.0 C (41.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Chapalacana still stand. 1987 holds the most, with 101.

Standing records at Chapalacana by the year they were set
Year set	Standing records
1977	29
1978	62
1979	29
1980	84
1981	66
1982	52
1983	72
1984	48
1985	30
1986	54
1987	101
1988	85
1989	90
1990	47
1991	20
1992	60
1993	41
1994	29
1995	58
1996	30
1997	56
1998	41
1999	33
2000	45
2001	43
2005	54
2006	58
2007	47

Wettest Day of Each Month

Jan: 119.4 mm (4.7 in)

The wettest day on record for each calendar month at Chapalacana. The most was 119.4 mm (4.7 in) on 12 January 1987.

Record daily precipitation for each month at Chapalacana
Month	Record daily precipitation (mm)	Date
Jan	119.4 mm (4.7 in)	12 January 1987
Feb	49.8 mm (2.0 in)	25 February 1987
Mar	23.6 mm (0.9 in)	2 March 2001
Apr	20.1 mm (0.8 in)	3 April 1997
May	21.6 mm (0.9 in)	27 May 1983
Jun	77.0 mm (3.0 in)	4 June 1975
Jul	68.1 mm (2.7 in)	9 July 1989
Aug	73.9 mm (2.9 in)	13 August 1977
Sep	80.3 mm (3.2 in)	1 September 1995
Oct	53.6 mm (2.1 in)	6 October 1982
Nov	36.8 mm (1.4 in)	26 November 1976
Dec	68.3 mm (2.7 in)	13 December 1992

Period of Record Coverage

1977 to 2007

28 years of record at Chapalacana, 1977 to 2007. 7 years have data for under 90 percent of days and are left out of rankings: 1977, 1979, 1984, 1985, 1991, 1992, 2007.

Days with data per year at Chapalacana
Year	Days with data	Share of year	Complete
1977	129	35%	No
1978	365	100%	Yes
1979	213	58%	No
1980	334	91%	Yes
1981	362	99%	Yes
1982	330	90%	Yes
1983	353	97%	Yes
1984	325	89%	No
1985	274	75%	No
1986	365	100%	Yes
1987	354	97%	Yes
1988	358	98%	Yes
1989	364	100%	Yes
1990	351	96%	Yes
1991	281	77%	No
1992	315	86%	No
1993	364	100%	Yes
1994	360	99%	Yes
1995	355	97%	Yes
1996	349	95%	Yes
1997	360	99%	Yes
1998	356	98%	Yes
1999	360	99%	Yes
2000	366	100%	Yes
2001	333	91%	Yes
2005	356	98%	Yes
2006	333	91%	Yes
2007	214	59%	No

Latest Records

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

Climate Trend

17 complete years, 1978 to 2005

One stripe for each of 17 complete years at Chapalacana, 1978 to 2005. Blue stripes are years cooler than the station's own mean of 27.1 C (80.8 F); red stripes are warmer. The coolest year was 1997, at 26.5 C (79.7 F), and the warmest was 1989, at 27.9 C (82.2 F). The strongest colour marks a difference of 0.8 C (1.4 F).

Annual mean temperature at Chapalacana as warming stripes, 1978 to 2005
Year	Annual mean temperature	Difference from the station mean
1978	27.0 C	-0.08 C
1981	27.3 C	+0.23 C
1983	26.7 C	-0.43 C
1986	27.4 C	+0.26 C
1987	27.0 C	-0.11 C
1988	27.5 C	+0.44 C
1989	27.9 C	+0.79 C
1993	27.0 C	-0.15 C
1994	27.4 C	+0.33 C
1995	27.6 C	+0.46 C
1996	27.0 C	-0.08 C
1997	26.5 C	-0.59 C
1998	26.9 C	-0.16 C
1999	26.8 C	-0.31 C
2000	26.9 C	-0.19 C
2001	26.8 C	-0.34 C
2005	27.0 C	-0.10 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

1975 to 2007

Yearly extremes at Chapalacana: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	47.2 C (117.0 F)	1980	43.3 C (109.9 F)	28
Coldest night (TNn)	5.0 C (41.0 F)	2001	8.9 C (48.0 F)	28
Wettest day (Rx1day)	119.4 mm (4.7 in)	1987	57.3 mm (2.3 in)	30
Wettest five days (Rx5day)	209.1 mm (8.2 in)	1987	107.6 mm (4.2 in)	30
Longest dry spell (CDD)	164 days	1999	97 days	30

Hottest day (TXx)

The hottest day of the year at Chapalacana, 1975 to 2007. The record is 47.2 C (117.0 F) in 1980, marked on the chart; the median year is 43.3 C (109.9 F).

Hottest day (TXx) at Chapalacana by year
Year	Hottest day (TXx)
1975	n/a
1976	n/a
1977	38.9 C (102.0 F)
1978	42.8 C (109.0 F)
1979	42.8 C (109.0 F)
1980	47.2 C (117.0 F)
1981	43.9 C (111.0 F)
1982	43.3 C (109.9 F)
1983	43.3 C (109.9 F)
1984	43.3 C (109.9 F)
1985	42.2 C (108.0 F)
1986	42.2 C (108.0 F)
1987	46.1 C (115.0 F)
1988	46.1 C (115.0 F)
1989	45.0 C (113.0 F)
1990	42.8 C (109.0 F)
1991	42.2 C (108.0 F)
1992	46.1 C (115.0 F)
1993	44.4 C (111.9 F)
1994	42.8 C (109.0 F)
1995	42.2 C (108.0 F)
1996	42.2 C (108.0 F)
1997	43.9 C (111.0 F)
1998	43.9 C (111.0 F)
1999	41.7 C (107.1 F)
2000	43.3 C (109.9 F)
2001	42.8 C (109.0 F)
2005	45.0 C (113.0 F)
2006	43.9 C (111.0 F)
2007	45.0 C (113.0 F)

Coldest night (TNn)

The coldest night of the year at Chapalacana, 1975 to 2007. The record is 5.0 C (41.0 F) in 2001, marked on the chart; the median year is 8.9 C (48.0 F).

Coldest night (TNn) at Chapalacana by year
Year	Coldest night (TNn)
1975	n/a
1976	n/a
1977	8.9 C (48.0 F)
1978	10.0 C (50.0 F)
1979	9.4 C (48.9 F)
1980	8.9 C (48.0 F)
1981	11.1 C (52.0 F)
1982	10.0 C (50.0 F)
1983	6.1 C (43.0 F)
1984	10.0 C (50.0 F)
1985	8.9 C (48.0 F)
1986	7.8 C (46.0 F)
1987	9.4 C (48.9 F)
1988	6.7 C (44.1 F)
1989	10.0 C (50.0 F)
1990	7.8 C (46.0 F)
1991	9.4 C (48.9 F)
1992	9.4 C (48.9 F)
1993	8.9 C (48.0 F)
1994	10.0 C (50.0 F)
1995	10.0 C (50.0 F)
1996	8.9 C (48.0 F)
1997	5.6 C (42.1 F)
1998	7.8 C (46.0 F)
1999	6.7 C (44.1 F)
2000	8.9 C (48.0 F)
2001	5.0 C (41.0 F)
2005	8.3 C (46.9 F)
2006	6.7 C (44.1 F)
2007	10.6 C (51.1 F)

Wettest day (Rx1day)

The wettest day of the year at Chapalacana, 1975 to 2007. The record is 119.4 mm (4.7 in) in 1987, marked on the chart; the median year is 57.3 mm (2.3 in).

Wettest day (Rx1day) at Chapalacana by year
Year	Wettest day (Rx1day)
1975	77.0 mm (3.0 in)
1976	59.4 mm (2.3 in)
1977	73.9 mm (2.9 in)
1978	68.6 mm (2.7 in)
1979	41.9 mm (1.6 in)
1980	42.2 mm (1.7 in)
1981	51.6 mm (2.0 in)
1982	56.1 mm (2.2 in)
1983	72.4 mm (2.9 in)
1984	48.3 mm (1.9 in)
1985	43.2 mm (1.7 in)
1986	65.3 mm (2.6 in)
1987	119.4 mm (4.7 in)
1988	64.5 mm (2.5 in)
1989	68.1 mm (2.7 in)
1990	58.4 mm (2.3 in)
1991	55.1 mm (2.2 in)
1992	68.3 mm (2.7 in)
1993	42.2 mm (1.7 in)
1994	69.3 mm (2.7 in)
1995	80.3 mm (3.2 in)
1996	63.5 mm (2.5 in)
1997	47.8 mm (1.9 in)
1998	50.8 mm (2.0 in)
1999	67.6 mm (2.7 in)
2000	53.1 mm (2.1 in)
2001	46.5 mm (1.8 in)
2005	52.8 mm (2.1 in)
2006	41.4 mm (1.6 in)
2007	42.2 mm (1.7 in)

Wettest five days (Rx5day)

The wettest five days of the year at Chapalacana, 1975 to 2007. The record is 209.1 mm (8.2 in) in 1987, marked on the chart; the median year is 107.6 mm (4.2 in).

Wettest five days (Rx5day) at Chapalacana by year
Year	Wettest five days (Rx5day)
1975	130.6 mm (5.1 in)
1976	129.6 mm (5.1 in)
1977	122.7 mm (4.8 in)
1978	115.9 mm (4.6 in)
1979	77.7 mm (3.1 in)
1980	79.5 mm (3.1 in)
1981	131.7 mm (5.2 in)
1982	86.8 mm (3.4 in)
1983	114.2 mm (4.5 in)
1984	107.2 mm (4.2 in)
1985	150.2 mm (5.9 in)
1986	117.4 mm (4.6 in)
1987	209.1 mm (8.2 in)
1988	90.5 mm (3.6 in)
1989	124.2 mm (4.9 in)
1990	85.9 mm (3.4 in)
1991	84.1 mm (3.3 in)
1992	86.1 mm (3.4 in)
1993	125.3 mm (4.9 in)
1994	139.9 mm (5.5 in)
1995	110.8 mm (4.4 in)
1996	101.9 mm (4.0 in)
1997	92.6 mm (3.6 in)
1998	107.9 mm (4.2 in)
1999	101.6 mm (4.0 in)
2000	101.6 mm (4.0 in)
2001	81.1 mm (3.2 in)
2005	110.1 mm (4.3 in)
2006	87.0 mm (3.4 in)
2007	43.5 mm (1.7 in)

Longest dry spell (CDD)

The longest dry spell of the year at Chapalacana, 1975 to 2007. The record is 164 days in 1999, marked on the chart; the median year is 97 days.

Longest dry spell (CDD) at Chapalacana by year
Year	Longest dry spell (CDD)
1975	79 days
1976	159 days
1977	65 days
1978	112 days
1979	110 days
1980	77 days
1981	58 days
1982	123 days
1983	73 days
1984	69 days
1985	135 days
1986	128 days
1987	80 days
1988	96 days
1989	150 days
1990	89 days
1991	120 days
1992	35 days
1993	136 days
1994	77 days
1995	163 days
1996	63 days
1997	58 days
1998	110 days
1999	164 days
2000	151 days
2001	77 days
2005	102 days
2006	97 days
2007	70 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 Chapalacana standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Chapalacana 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).