Acatlan Weather Records (MXN00030338)

Record envelope, standing records and threshold days for Acatlan (MXN00030338), Mexico, with 33 years of record.

Key Facts for Acatlan

Acatlan (MXN00030338) is a weather station in Mexico at 19.68 latitude and -96.83 longitude, 1,751 m (5,744 ft) above sea level.
The station reports from 1979 to 2011, 33 years of record.
1,464 records set at Acatlan still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Acatlan set a daily record precipitation of 13.5 mm (0.5 in) on 17 November 2011.

About the Station

Location: Mexico, 19.68 latitude, -96.83 longitude.
Elevation: 1,751 m (5,744 ft).
Period of record: 1979 to 2011, 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 Acatlan. 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 Acatlan, 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)	0.0 C (32.0 F)	n/a	n/a
Feb	27.8 C (82.0 F)	-1.1 C (30.0 F)	n/a	n/a
Mar	30.6 C (87.1 F)	-1.1 C (30.0 F)	n/a	n/a
Apr	32.8 C (91.0 F)	1.7 C (35.1 F)	n/a	n/a
May	32.8 C (91.0 F)	5.6 C (42.1 F)	n/a	n/a
Jun	32.8 C (91.0 F)	5.6 C (42.1 F)	n/a	n/a
Jul	25.6 C (78.1 F)	3.9 C (39.0 F)	n/a	n/a
Aug	26.7 C (80.1 F)	2.8 C (37.0 F)	n/a	n/a
Sep	26.7 C (80.1 F)	3.9 C (39.0 F)	n/a	n/a
Oct	27.8 C (82.0 F)	2.8 C (37.0 F)	n/a	n/a
Nov	30.6 C (87.1 F)	1.7 C (35.1 F)	n/a	n/a
Dec	26.7 C (80.1 F)	-3.3 C (26.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Acatlan still stand. 1998 holds the most, with 133.

Standing records at Acatlan by the year they were set
Year set	Standing records
1979	34
1980	90
1981	72
1982	66
1983	77
1984	81
1985	36
1986	48
1987	59
1988	62
1989	75
1990	18
1991	51
1992	42
1993	57
1994	19
1995	26
1996	72
1997	65
1998	133
2004	67
2005	38
2006	58
2007	19
2008	25
2009	30
2010	21
2011	23

Wettest Day of Each Month

Aug: 180.1 mm (7.1 in)

The wettest day on record for each calendar month at Acatlan. The most was 180.1 mm (7.1 in) on 22 August 2007.

Record daily precipitation for each month at Acatlan
Month	Record daily precipitation (mm)	Date
Jan	41.1 mm (1.6 in)	16 January 1992
Feb	39.6 mm (1.6 in)	19 February 1990
Mar	45.7 mm (1.8 in)	26 March 1996
Apr	67.3 mm (2.6 in)	13 April 2008
May	56.4 mm (2.2 in)	17 May 2009
Jun	129.8 mm (5.1 in)	17 June 1981
Jul	116.8 mm (4.6 in)	12 July 1984
Aug	180.1 mm (7.1 in)	22 August 2007
Sep	142.7 mm (5.6 in)	24 September 1980
Oct	152.4 mm (6.0 in)	7 October 2008
Nov	83.8 mm (3.3 in)	21 November 1998
Dec	37.3 mm (1.5 in)	2 December 1979

Period of Record Coverage

1979 to 2011

29 years of record at Acatlan, 1979 to 2011. 5 years have data for under 90 percent of days and are left out of rankings: 1979, 1987, 1990, 2003, 2008.

Days with data per year at Acatlan
Year	Days with data	Share of year	Complete
1979	117	32%	No
1980	360	98%	Yes
1981	363	99%	Yes
1982	358	98%	Yes
1983	358	98%	Yes
1984	363	99%	Yes
1985	330	90%	Yes
1986	337	92%	Yes
1987	292	80%	No
1988	361	99%	Yes
1989	362	99%	Yes
1990	87	24%	No
1991	363	99%	Yes
1992	365	100%	Yes
1993	365	100%	Yes
1994	365	100%	Yes
1995	365	100%	Yes
1996	365	100%	Yes
1997	365	100%	Yes
1998	334	92%	Yes
2003	31	8%	No
2004	366	100%	Yes
2005	364	100%	Yes
2006	365	100%	Yes
2007	365	100%	Yes
2008	304	83%	No
2009	365	100%	Yes
2010	365	100%	Yes
2011	364	100%	Yes

Latest Records

Latest records at Acatlan
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 November 2011	Acatlan, MX	daily rain	13.5 mm (0.5 in)	5.1 mm (0.20 in)	0 years	7 of 100 (Routine)
18 October 2011	Acatlan, MX	daily rain	35.3 mm (1.4 in)	2.5 mm (0.10 in)	12 years	7 of 100 (Routine)
11 September 2011	Acatlan, MX	daily rain	44.5 mm (1.8 in)	2.6 mm (0.10 in)	18 years	9 of 100 (Routine)
10 September 2011	Acatlan, MX	daily rain	58.4 mm (2.3 in)	36.0 mm (1.4 in)	1 year	23 of 100 (Routine)
2 July 2011	Acatlan, MX	daily rain	72.4 mm (2.9 in)	29.5 mm (1.2 in)	12 years	23 of 100 (Routine)
1 July 2011	Acatlan, MX	daily rain	64.3 mm (2.5 in)	16.0 mm (0.6 in)	4 years	13 of 100 (Routine)
29 June 2011	Acatlan, MX	daily rain	87.4 mm (3.4 in)	55.6 mm (2.2 in)	4 years	40 of 100 (Notable)
14 June 2011	Acatlan, MX	daily rain	42.2 mm (1.7 in)	21.4 mm (0.8 in)	8 years	19 of 100 (Routine)
4 April 2011	Acatlan, MX	daily rain	28.4 mm (1.1 in)	16.5 mm (0.6 in)	4 years	20 of 100 (Routine)
14 January 2011	Acatlan, MX	daily rain	24.4 mm (1.0 in)	16.3 mm (0.6 in)	19 years	20 of 100 (Routine)

Climate Trend

21 complete years, 1980 to 2011

One stripe for each of 21 complete years at Acatlan, 1980 to 2011. Blue stripes are years cooler than the station's own mean of 15.0 C (59.1 F); red stripes are warmer. The coolest year was 1984, at 14.6 C (58.2 F), and the warmest was 1996, at 15.7 C (60.3 F). The strongest colour marks a difference of 0.8 C (1.4 F).

Annual mean temperature at Acatlan as warming stripes, 1980 to 2011
Year	Annual mean temperature	Difference from the station mean
1980	15.2 C	+0.15 C
1981	14.8 C	-0.22 C
1982	15.2 C	+0.17 C
1983	15.2 C	+0.19 C
1984	14.6 C	-0.46 C
1988	14.9 C	-0.15 C
1989	14.8 C	-0.20 C
1991	15.4 C	+0.40 C
1992	14.8 C	-0.20 C
1993	15.4 C	+0.34 C
1994	15.6 C	+0.53 C
1995	15.1 C	+0.05 C
1996	15.7 C	+0.71 C
1997	15.1 C	+0.04 C
2004	14.7 C	-0.33 C
2005	14.9 C	-0.14 C
2006	14.8 C	-0.20 C
2007	14.8 C	-0.23 C
2009	15.3 C	+0.25 C
2010	14.6 C	-0.39 C
2011	14.8 C	-0.24 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

1979 to 2011

Yearly extremes at Acatlan: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	32.8 C (91.0 F)	1998	28.9 C (84.0 F)	29
Coldest night (TNn)	-3.3 C (26.1 F)	1989	0.6 C (33.1 F)	29
Wettest day (Rx1day)	180.1 mm (7.1 in)	2007	66.8 mm (2.6 in)	33
Wettest five days (Rx5day)	363.8 mm (14.3 in)	2008	147.9 mm (5.8 in)	33
Longest dry spell (CDD)	51 days	2000	22 days	33

Hottest day (TXx)

The hottest day of the year at Acatlan, 1979 to 2011. The record is 32.8 C (91.0 F) in 1998, marked on the chart; the median year is 28.9 C (84.0 F).

Hottest day (TXx) at Acatlan by year
Year	Hottest day (TXx)
1979	25.0 C (77.0 F)
1980	28.9 C (84.0 F)
1981	28.9 C (84.0 F)
1982	30.0 C (86.0 F)
1983	31.7 C (89.1 F)
1984	30.6 C (87.1 F)
1985	26.7 C (80.1 F)
1986	28.9 C (84.0 F)
1987	28.9 C (84.0 F)
1988	30.0 C (86.0 F)
1989	28.9 C (84.0 F)
1990	26.7 C (80.1 F)
1991	30.6 C (87.1 F)
1992	26.7 C (80.1 F)
1993	30.6 C (87.1 F)
1994	28.9 C (84.0 F)
1995	27.8 C (82.0 F)
1996	26.7 C (80.1 F)
1997	27.8 C (82.0 F)
1998	32.8 C (91.0 F)
1999	n/a
2000	n/a
2001	n/a
2002	n/a
2003	22.8 C (73.0 F)
2004	28.9 C (84.0 F)
2005	30.0 C (86.0 F)
2006	30.6 C (87.1 F)
2007	28.9 C (84.0 F)
2008	28.9 C (84.0 F)
2009	28.9 C (84.0 F)
2010	30.0 C (86.0 F)
2011	30.0 C (86.0 F)

Coldest night (TNn)

The coldest night of the year at Acatlan, 1979 to 2011. The record is -3.3 C (26.1 F) in 1989, marked on the chart; the median year is 0.6 C (33.1 F).

Coldest night (TNn) at Acatlan by year
Year	Coldest night (TNn)
1979	2.8 C (37.0 F)
1980	2.8 C (37.0 F)
1981	2.8 C (37.0 F)
1982	0.6 C (33.1 F)
1983	0.0 C (32.0 F)
1984	1.7 C (35.1 F)
1985	0.6 C (33.1 F)
1986	0.0 C (32.0 F)
1987	0.6 C (33.1 F)
1988	0.0 C (32.0 F)
1989	-3.3 C (26.1 F)
1990	1.7 C (35.1 F)
1991	2.8 C (37.0 F)
1992	0.6 C (33.1 F)
1993	-1.1 C (30.0 F)
1994	1.7 C (35.1 F)
1995	1.7 C (35.1 F)
1996	0.0 C (32.0 F)
1997	0.6 C (33.1 F)
1998	0.6 C (33.1 F)
1999	n/a
2000	n/a
2001	n/a
2002	n/a
2003	8.9 C (48.0 F)
2004	0.6 C (33.1 F)
2005	2.8 C (37.0 F)
2006	0.6 C (33.1 F)
2007	2.8 C (37.0 F)
2008	1.7 C (35.1 F)
2009	3.9 C (39.0 F)
2010	2.8 C (37.0 F)
2011	0.0 C (32.0 F)

Wettest day (Rx1day)

The wettest day of the year at Acatlan, 1979 to 2011. The record is 180.1 mm (7.1 in) in 2007, marked on the chart; the median year is 66.8 mm (2.6 in).

Wettest day (Rx1day) at Acatlan by year
Year	Wettest day (Rx1day)
1979	84.3 mm (3.3 in)
1980	142.7 mm (5.6 in)
1981	129.8 mm (5.1 in)
1982	66.3 mm (2.6 in)
1983	66.8 mm (2.6 in)
1984	116.8 mm (4.6 in)
1985	79.8 mm (3.1 in)
1986	64.3 mm (2.5 in)
1987	63.8 mm (2.5 in)
1988	54.9 mm (2.2 in)
1989	53.8 mm (2.1 in)
1990	39.6 mm (1.6 in)
1991	79.8 mm (3.1 in)
1992	62.0 mm (2.4 in)
1993	47.5 mm (1.9 in)
1994	47.2 mm (1.9 in)
1995	59.9 mm (2.4 in)
1996	47.0 mm (1.9 in)
1997	48.3 mm (1.9 in)
1998	94.0 mm (3.7 in)
1999	99.8 mm (3.9 in)
2000	79.8 mm (3.1 in)
2001	119.9 mm (4.7 in)
2002	79.8 mm (3.1 in)
2003	54.9 mm (2.2 in)
2004	59.2 mm (2.3 in)
2005	51.8 mm (2.0 in)
2006	67.6 mm (2.7 in)
2007	180.1 mm (7.1 in)
2008	152.4 mm (6.0 in)
2009	60.2 mm (2.4 in)
2010	122.4 mm (4.8 in)
2011	87.4 mm (3.4 in)

Wettest five days (Rx5day)

The wettest five days of the year at Acatlan, 1979 to 2011. The record is 363.8 mm (14.3 in) in 2008, marked on the chart; the median year is 147.9 mm (5.8 in).

Wettest five days (Rx5day) at Acatlan by year
Year	Wettest five days (Rx5day)
1979	166.2 mm (6.5 in)
1980	338.8 mm (13.3 in)
1981	217.2 mm (8.6 in)
1982	121.4 mm (4.8 in)
1983	184.4 mm (7.3 in)
1984	280.1 mm (11.0 in)
1985	140.7 mm (5.5 in)
1986	149.1 mm (5.9 in)
1987	106.4 mm (4.2 in)
1988	109.3 mm (4.3 in)
1989	111.5 mm (4.4 in)
1990	83.5 mm (3.3 in)
1991	147.9 mm (5.8 in)
1992	180.9 mm (7.1 in)
1993	145.3 mm (5.7 in)
1994	145.3 mm (5.7 in)
1995	118.4 mm (4.7 in)
1996	106.1 mm (4.2 in)
1997	112.9 mm (4.4 in)
1998	192.1 mm (7.6 in)
1999	209.3 mm (8.2 in)
2000	162.3 mm (6.4 in)
2001	160.5 mm (6.3 in)
2002	118.1 mm (4.6 in)
2003	144.6 mm (5.7 in)
2004	86.9 mm (3.4 in)
2005	142.0 mm (5.6 in)
2006	148.1 mm (5.8 in)
2007	305.0 mm (12.0 in)
2008	363.8 mm (14.3 in)
2009	145.8 mm (5.7 in)
2010	225.4 mm (8.9 in)
2011	293.5 mm (11.6 in)

Longest dry spell (CDD)

The longest dry spell of the year at Acatlan, 1979 to 2011. The record is 51 days in 2000, marked on the chart; the median year is 22 days.

Longest dry spell (CDD) at Acatlan by year
Year	Longest dry spell (CDD)
1979	11 days
1980	15 days
1981	21 days
1982	23 days
1983	39 days
1984	24 days
1985	16 days
1986	25 days
1987	18 days
1988	17 days
1989	18 days
1990	22 days
1991	22 days
1992	11 days
1993	19 days
1994	18 days
1995	20 days
1996	20 days
1997	21 days
1998	40 days
1999	27 days
2000	51 days
2001	23 days
2002	36 days
2003	35 days
2004	14 days
2005	28 days
2006	24 days
2007	14 days
2008	16 days
2009	23 days
2010	22 days
2011	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.

Rainfall Return Levels

30 years, 1980 to 2011

A day with at least 72.5 mm (2.9 in) of rain is expected about once in 2 years. A day with at least 234.8 mm (9.2 in) of rain is expected about once in 100 years.

Rainfall return levels at Acatlan: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	72.5 mm (2.9 in)
5 years	102.4 mm (4.0 in)
10 years	126.7 mm (5.0 in)
25 years	163.8 mm (6.4 in)
50 years	196.7 mm (7.7 in)	Longer than the 30 years of record
100 years	234.8 mm (9.2 in)	Longer than the 30 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, 30 years of values from 1980 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: 180.1 mm (7.1 in) in 2007; 152.4 mm (6.0 in) in 2008; 142.7 mm (5.6 in) in 1980.

Download the Data

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