Acahuato Weather Records (MXN00016228)

Record envelope, standing records and threshold days for Acahuato (MXN00016228), Mexico, with 32 years of record.

Key Facts for Acahuato

Acahuato (MXN00016228) is a weather station in Mexico at 19.13 latitude and -102.32 longitude, 227 m (744 ft) above sea level.
The station reports from 1981 to 2012, 32 years of record.
1,464 records set at Acahuato still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Acahuato tied a daily record low minimum temperature of 12.8 C (55.0 F) on 29 September 2012.

About the Station

Location: Mexico, 19.13 latitude, -102.32 longitude.
Elevation: 227 m (744 ft).
Period of record: 1981 to 2012, 32 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 Acahuato. 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 Acahuato, 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)	7.8 C (46.0 F)	n/a	n/a
Feb	40.6 C (105.1 F)	5.0 C (41.0 F)	n/a	n/a
Mar	44.4 C (111.9 F)	8.9 C (48.0 F)	n/a	n/a
Apr	46.1 C (115.0 F)	10.0 C (50.0 F)	n/a	n/a
May	42.8 C (109.0 F)	10.0 C (50.0 F)	n/a	n/a
Jun	40.6 C (105.1 F)	11.1 C (52.0 F)	n/a	n/a
Jul	40.0 C (104.0 F)	11.7 C (53.1 F)	n/a	n/a
Aug	38.9 C (102.0 F)	12.8 C (55.0 F)	n/a	n/a
Sep	36.7 C (98.1 F)	10.0 C (50.0 F)	n/a	n/a
Oct	35.6 C (96.1 F)	8.9 C (48.0 F)	n/a	n/a
Nov	35.0 C (95.0 F)	7.8 C (46.0 F)	n/a	n/a
Dec	35.0 C (95.0 F)	6.7 C (44.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Acahuato still stand. 2010 holds the most, with 145.

Standing records at Acahuato by the year they were set
Year set	Standing records
1981	49
1982	35
1983	35
1984	22
1985	39
1986	18
1987	36
1988	25
1989	26
1990	18
1991	17
1992	27
1993	7
1994	39
1995	122
1996	41
1997	83
1998	63
1999	82
2000	45
2001	75
2002	26
2003	9
2004	19
2005	7
2006	27
2007	81
2008	29
2009	57
2010	145
2011	87
2012	73

Wettest Day of Each Month

Aug: 145.8 mm (5.7 in)

The wettest day on record for each calendar month at Acahuato. The most was 145.8 mm (5.7 in) on 12 August 1983.

Record daily precipitation for each month at Acahuato
Month	Record daily precipitation (mm)	Date
Jan	49.8 mm (2.0 in)	16 January 1992
Feb	78.0 mm (3.1 in)	3 February 2010
Mar	18.8 mm (0.7 in)	1 March 2001
Apr	1.3 mm (0.05 in)	15 April 1981
May	71.9 mm (2.8 in)	26 May 1983
Jun	99.8 mm (3.9 in)	30 June 1999
Jul	119.9 mm (4.7 in)	21 July 2010
Aug	145.8 mm (5.7 in)	12 August 1983
Sep	99.8 mm (3.9 in)	11 September 2005
Oct	95.0 mm (3.7 in)	13 October 2008
Nov	52.8 mm (2.1 in)	25 November 1990
Dec	21.8 mm (0.9 in)	29 December 1995

Period of Record Coverage

1981 to 2012

32 years of record at Acahuato, 1981 to 2012. 2 years have data for under 90 percent of days and are left out of rankings: 1995, 2012.

Days with data per year at Acahuato
Year	Days with data	Share of year	Complete
1981	364	100%	Yes
1982	365	100%	Yes
1983	364	100%	Yes
1984	366	100%	Yes
1985	365	100%	Yes
1986	335	92%	Yes
1987	365	100%	Yes
1988	366	100%	Yes
1989	334	92%	Yes
1990	334	92%	Yes
1991	365	100%	Yes
1992	366	100%	Yes
1993	335	92%	Yes
1994	334	92%	Yes
1995	311	85%	No
1996	335	92%	Yes
1997	334	92%	Yes
1998	365	100%	Yes
1999	365	100%	Yes
2000	366	100%	Yes
2001	365	100%	Yes
2002	364	100%	Yes
2003	364	100%	Yes
2004	365	100%	Yes
2005	365	100%	Yes
2006	365	100%	Yes
2007	365	100%	Yes
2008	366	100%	Yes
2009	365	100%	Yes
2010	360	99%	Yes
2011	365	100%	Yes
2012	272	74%	No

Latest Records

Latest records at Acahuato
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
29 September 2012	Acahuato, MX	daily low min (Tie)	12.8 C (55.0 F)	tie	1 year	0 of 100 (Routine)
28 September 2012	Acahuato, MX	daily low min (Tie)	13.9 C (57.0 F)	tie	2 years	0 of 100 (Routine)
27 September 2012	Acahuato, MX	daily low min (Tie)	13.9 C (57.0 F)	tie	1 year	0 of 100 (Routine)
26 September 2012	Acahuato, MX	daily low min	13.9 C (57.0 F)	1.1 C (2.0 F)	12 years	13 of 100 (Routine)
23 September 2012	Acahuato, MX	daily low min (Tie)	13.9 C (57.0 F)	tie	1 year	0 of 100 (Routine)
21 September 2012	Acahuato, MX	daily low min (Tie)	13.9 C (57.0 F)	tie	12 years	1 of 100 (Routine)
20 September 2012	Acahuato, MX	daily low min (Tie)	13.9 C (57.0 F)	tie	12 years	1 of 100 (Routine)
19 September 2012	Acahuato, MX	daily low min (Tie)	13.9 C (57.0 F)	tie	5 years	1 of 100 (Routine)
18 September 2012	Acahuato, MX	daily low min (Tie)	13.9 C (57.0 F)	tie	5 years	1 of 100 (Routine)
16 September 2012	Acahuato, MX	daily low min (Tie)	13.9 C (57.0 F)	tie	4 years	1 of 100 (Routine)
15 September 2012	Acahuato, MX	daily low min	13.3 C (55.9 F)	0.6 C (1.1 F)	4 years	7 of 100 (Routine)
14 September 2012	Acahuato, MX	daily low min	12.2 C (54.0 F)	1.7 C (3.1 F)	1 year	13 of 100 (Routine)
13 September 2012	Acahuato, MX	daily low min	12.2 C (54.0 F)	1.7 C (3.1 F)	1 year	13 of 100 (Routine)
10 September 2012	Acahuato, MX	daily low max (Tie)	25.0 C (77.0 F)	tie	31 years	3 of 100 (Routine)
9 September 2012	Acahuato, MX	daily low max (Tie)	23.9 C (75.0 F)	tie	14 years	1 of 100 (Routine)
8 September 2012	Acahuato, MX	daily rain	45.0 mm (1.8 in)	13.2 mm (0.5 in)	28 years	18 of 100 (Routine)
8 September 2012	Acahuato, MX	daily low max	24.4 C (75.9 F)	0.6 C (1.1 F)	31 years	15 of 100 (Routine)
3 September 2012	Acahuato, MX	daily high max	32.8 C (91.0 F)	1.7 C (3.1 F)	3 years	11 of 100 (Routine)
3 September 2012	Acahuato, MX	daily low min (Tie)	15.0 C (59.0 F)	tie	3 years	0 of 100 (Routine)
31 August 2012	Acahuato, MX	daily low min (Tie)	13.9 C (57.0 F)	tie	3 years	0 of 100 (Routine)

Climate Trend

23 complete years, 1981 to 2011

One stripe for each of 23 complete years at Acahuato, 1981 to 2011. Blue stripes are years cooler than the station's own mean of 22.6 C (72.7 F); red stripes are warmer. The coolest year was 2010, at 20.6 C (69.1 F), and the warmest was 1999, at 24.1 C (75.4 F). The strongest colour marks a difference of 2.1 C (3.8 F).

Annual mean temperature at Acahuato as warming stripes, 1981 to 2011
Year	Annual mean temperature	Difference from the station mean
1981	22.6 C	-0.05 C
1982	23.4 C	+0.76 C
1983	22.5 C	-0.09 C
1984	22.5 C	-0.09 C
1985	22.9 C	+0.27 C
1987	23.1 C	+0.44 C
1988	22.9 C	+0.28 C
1991	23.2 C	+0.53 C
1992	22.3 C	-0.30 C
1998	23.2 C	+0.58 C
1999	24.1 C	+1.46 C
2000	23.3 C	+0.64 C
2001	22.3 C	-0.37 C
2002	22.6 C	-0.08 C
2003	22.4 C	-0.28 C
2004	22.5 C	-0.09 C
2005	23.0 C	+0.34 C
2006	22.6 C	+0.00 C
2007	23.0 C	+0.33 C
2008	22.2 C	-0.39 C
2009	22.3 C	-0.38 C
2010	20.6 C	-2.03 C
2011	21.1 C	-1.58 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

1981 to 2012

Yearly extremes at Acahuato: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	46.1 C (115.0 F)	1995	36.7 C (98.1 F)	32
Coldest night (TNn)	5.0 C (41.0 F)	2010	10.0 C (50.0 F)	32
Wettest day (Rx1day)	145.8 mm (5.7 in)	1983	80.7 mm (3.2 in)	32
Wettest five days (Rx5day)	264.4 mm (10.4 in)	1987	147.3 mm (5.8 in)	32
Longest dry spell (CDD)	167 days	1991	121 days	32

Hottest day (TXx)

The hottest day of the year at Acahuato, 1981 to 2012. The record is 46.1 C (115.0 F) in 1995, marked on the chart; the median year is 36.7 C (98.1 F).

Hottest day (TXx) at Acahuato by year
Year	Hottest day (TXx)
1981	35.0 C (95.0 F)
1982	36.1 C (97.0 F)
1983	36.1 C (97.0 F)
1984	35.0 C (95.0 F)
1985	35.6 C (96.1 F)
1986	36.7 C (98.1 F)
1987	35.6 C (96.1 F)
1988	37.8 C (100.0 F)
1989	35.0 C (95.0 F)
1990	35.0 C (95.0 F)
1991	37.2 C (99.0 F)
1992	35.6 C (96.1 F)
1993	39.4 C (102.9 F)
1994	35.0 C (95.0 F)
1995	46.1 C (115.0 F)
1996	33.9 C (93.0 F)
1997	33.3 C (91.9 F)
1998	38.9 C (102.0 F)
1999	38.9 C (102.0 F)
2000	41.7 C (107.1 F)
2001	35.6 C (96.1 F)
2002	35.0 C (95.0 F)
2003	35.0 C (95.0 F)
2004	37.2 C (99.0 F)
2005	37.2 C (99.0 F)
2006	36.7 C (98.1 F)
2007	40.0 C (104.0 F)
2008	40.6 C (105.1 F)
2009	40.0 C (104.0 F)
2010	40.6 C (105.1 F)
2011	40.0 C (104.0 F)
2012	40.0 C (104.0 F)

Coldest night (TNn)

The coldest night of the year at Acahuato, 1981 to 2012. The record is 5.0 C (41.0 F) in 2010, marked on the chart; the median year is 10.0 C (50.0 F).

Coldest night (TNn) at Acahuato by year
Year	Coldest night (TNn)
1981	10.0 C (50.0 F)
1982	10.0 C (50.0 F)
1983	9.4 C (48.9 F)
1984	10.6 C (51.1 F)
1985	10.6 C (51.1 F)
1986	10.0 C (50.0 F)
1987	11.1 C (52.0 F)
1988	10.0 C (50.0 F)
1989	10.6 C (51.1 F)
1990	11.7 C (53.1 F)
1991	10.0 C (50.0 F)
1992	9.4 C (48.9 F)
1993	10.0 C (50.0 F)
1994	10.0 C (50.0 F)
1995	10.6 C (51.1 F)
1996	11.7 C (53.1 F)
1997	10.6 C (51.1 F)
1998	11.1 C (52.0 F)
1999	11.7 C (53.1 F)
2000	12.8 C (55.0 F)
2001	11.7 C (53.1 F)
2002	7.8 C (46.0 F)
2003	10.6 C (51.1 F)
2004	10.0 C (50.0 F)
2005	10.6 C (51.1 F)
2006	7.8 C (46.0 F)
2007	10.0 C (50.0 F)
2008	9.4 C (48.9 F)
2009	6.7 C (44.1 F)
2010	5.0 C (41.0 F)
2011	7.8 C (46.0 F)
2012	7.8 C (46.0 F)

Wettest day (Rx1day)

The wettest day of the year at Acahuato, 1981 to 2012. The record is 145.8 mm (5.7 in) in 1983, marked on the chart; the median year is 80.7 mm (3.2 in).

Wettest day (Rx1day) at Acahuato by year
Year	Wettest day (Rx1day)
1981	92.5 mm (3.6 in)
1982	78.0 mm (3.1 in)
1983	145.8 mm (5.7 in)
1984	80.5 mm (3.2 in)
1985	69.9 mm (2.8 in)
1986	80.8 mm (3.2 in)
1987	80.0 mm (3.1 in)
1988	112.8 mm (4.4 in)
1989	59.9 mm (2.4 in)
1990	91.9 mm (3.6 in)
1991	88.9 mm (3.5 in)
1992	71.9 mm (2.8 in)
1993	61.0 mm (2.4 in)
1994	117.9 mm (4.6 in)
1995	110.0 mm (4.3 in)
1996	64.8 mm (2.6 in)
1997	80.3 mm (3.2 in)
1998	78.0 mm (3.1 in)
1999	99.8 mm (3.9 in)
2000	65.8 mm (2.6 in)
2001	89.9 mm (3.5 in)
2002	64.8 mm (2.6 in)
2003	89.9 mm (3.5 in)
2004	87.9 mm (3.5 in)
2005	99.8 mm (3.9 in)
2006	62.0 mm (2.4 in)
2007	119.9 mm (4.7 in)
2008	95.0 mm (3.7 in)
2009	63.8 mm (2.5 in)
2010	119.9 mm (4.7 in)
2011	79.8 mm (3.1 in)
2012	49.8 mm (2.0 in)

Wettest five days (Rx5day)

The wettest five days of the year at Acahuato, 1981 to 2012. The record is 264.4 mm (10.4 in) in 1987, marked on the chart; the median year is 147.3 mm (5.8 in).

Wettest five days (Rx5day) at Acahuato by year
Year	Wettest five days (Rx5day)
1981	122.3 mm (4.8 in)
1982	146.9 mm (5.8 in)
1983	150.6 mm (5.9 in)
1984	142.8 mm (5.6 in)
1985	140.5 mm (5.5 in)
1986	188.2 mm (7.4 in)
1987	264.4 mm (10.4 in)
1988	231.2 mm (9.1 in)
1989	107.5 mm (4.2 in)
1990	124.5 mm (4.9 in)
1991	115.6 mm (4.6 in)
1992	147.6 mm (5.8 in)
1993	120.7 mm (4.8 in)
1994	153.7 mm (6.1 in)
1995	202.3 mm (8.0 in)
1996	99.8 mm (3.9 in)
1997	151.2 mm (6.0 in)
1998	146.5 mm (5.8 in)
1999	138.7 mm (5.5 in)
2000	123.5 mm (4.9 in)
2001	159.5 mm (6.3 in)
2002	172.3 mm (6.8 in)
2003	159.2 mm (6.3 in)
2004	122.7 mm (4.8 in)
2005	152.7 mm (6.0 in)
2006	114.6 mm (4.5 in)
2007	191.8 mm (7.6 in)
2008	164.5 mm (6.5 in)
2009	82.6 mm (3.3 in)
2010	241.5 mm (9.5 in)
2011	238.6 mm (9.4 in)
2012	76.0 mm (3.0 in)

Longest dry spell (CDD)

The longest dry spell of the year at Acahuato, 1981 to 2012. The record is 167 days in 1991, marked on the chart; the median year is 121 days.

Longest dry spell (CDD) at Acahuato by year
Year	Longest dry spell (CDD)
1981	53 days
1982	91 days
1983	72 days
1984	127 days
1985	88 days
1986	98 days
1987	136 days
1988	101 days
1989	163 days
1990	78 days
1991	167 days
1992	103 days
1993	137 days
1994	62 days
1995	117 days
1996	138 days
1997	141 days
1998	156 days
1999	163 days
2000	146 days
2001	78 days
2002	89 days
2003	158 days
2004	125 days
2005	133 days
2006	109 days
2007	112 days
2008	160 days
2009	136 days
2010	112 days
2011	160 days
2012	94 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

31 years, 1981 to 2011

A day with at least 83.5 mm (3.3 in) of rain is expected about once in 2 years. A day with at least 156.2 mm (6.1 in) of rain is expected about once in 100 years.

Rainfall return levels at Acahuato: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	83.5 mm (3.3 in)
5 years	102.7 mm (4.0 in)
10 years	115.5 mm (4.5 in)
25 years	131.8 mm (5.2 in)
50 years	144.0 mm (5.7 in)	Longer than the 31 years of record
100 years	156.2 mm (6.1 in)	Longer than the 31 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, 31 years of values from 1981 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: 145.8 mm (5.7 in) in 1983; 119.9 mm (4.7 in) in 2007; 119.9 mm (4.7 in) in 2010.

Download the Data

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