Ameca la Vieja Weather Records (MXN00032103)

Record envelope, standing records and threshold days for Ameca la Vieja (MXN00032103), Mexico, with 37 years of record.

Key Facts for Ameca la Vieja

Ameca la Vieja (MXN00032103) is a weather station in Mexico at 22.92 latitude and -104.00 longitude, 1,800 m (5,905 ft) above sea level.
The station reports from 1976 to 2012, 37 years of record.
1,464 records set at Ameca la Vieja still stand.
Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

Location: Mexico, 22.92 latitude, -104.00 longitude.
Elevation: 1,800 m (5,905 ft).
Period of record: 1976 to 2012, 37 years.
Eligible elements: none yet.

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 Ameca la Vieja. 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 Ameca la Vieja, 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)	-7.2 C (19.0 F)	n/a	n/a
Feb	32.8 C (91.0 F)	-7.2 C (19.0 F)	n/a	n/a
Mar	35.0 C (95.0 F)	-3.3 C (26.1 F)	n/a	n/a
Apr	38.9 C (102.0 F)	-1.1 C (30.0 F)	n/a	n/a
May	40.6 C (105.1 F)	-2.2 C (28.0 F)	n/a	n/a
Jun	38.9 C (102.0 F)	3.9 C (39.0 F)	n/a	n/a
Jul	36.7 C (98.1 F)	7.8 C (46.0 F)	n/a	n/a
Aug	35.0 C (95.0 F)	7.8 C (46.0 F)	n/a	n/a
Sep	33.9 C (93.0 F)	5.0 C (41.0 F)	n/a	n/a
Oct	35.6 C (96.1 F)	0.0 C (32.0 F)	n/a	n/a
Nov	35.0 C (95.0 F)	-5.6 C (21.9 F)	n/a	n/a
Dec	30.0 C (86.0 F)	-10.0 C (14.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Ameca la Vieja still stand. 1991 holds the most, with 179.

Standing records at Ameca la Vieja by the year they were set
Year set	Standing records
1976	14
1977	53
1978	49
1980	26
1981	24
1982	31
1983	45
1984	51
1985	40
1986	55
1987	70
1988	82
1989	31
1990	49
1991	179
1992	152
1993	19
1994	79
1995	40
1996	36
1997	58
1998	39
1999	31
2000	30
2001	12
2002	4
2006	20
2007	18
2009	27
2010	41
2011	34
2012	25

Wettest Day of Each Month

Jan: 72.9 mm (2.9 in)

The wettest day on record for each calendar month at Ameca la Vieja. The most was 72.9 mm (2.9 in) on 12 January 1987.

Record daily precipitation for each month at Ameca la Vieja
Month	Record daily precipitation (mm)	Date
Jan	72.9 mm (2.9 in)	12 January 1987
Feb	62.0 mm (2.4 in)	2 February 2010
Mar	12.2 mm (0.5 in)	12 March 1983
Apr	24.4 mm (1.0 in)	3 April 1997
May	34.8 mm (1.4 in)	14 May 2009
Jun	63.5 mm (2.5 in)	23 June 2009
Jul	45.0 mm (1.8 in)	2 July 1998
Aug	58.9 mm (2.3 in)	31 August 1986
Sep	51.8 mm (2.0 in)	15 September 2000
Oct	42.4 mm (1.7 in)	13 October 1994
Nov	43.2 mm (1.7 in)	26 November 1982
Dec	62.0 mm (2.4 in)	18 December 1987

Period of Record Coverage

1976 to 2012

32 years of record at Ameca la Vieja, 1976 to 2012. 11 years have data for under 90 percent of days and are left out of rankings: 1976, 1980, 1981, 1986, 1987, 1989, 1990, 1992 and others.

Days with data per year at Ameca la Vieja
Year	Days with data	Share of year	Complete
1976	51	14%	No
1977	365	100%	Yes
1978	365	100%	Yes
1980	176	48%	No
1981	247	68%	No
1982	333	91%	Yes
1983	365	100%	Yes
1984	366	100%	Yes
1985	365	100%	Yes
1986	273	75%	No
1987	325	89%	No
1988	334	91%	Yes
1989	250	68%	No
1990	184	50%	No
1991	331	91%	Yes
1992	241	66%	No
1993	210	58%	No
1994	268	73%	No
1995	359	98%	Yes
1996	366	100%	Yes
1997	364	100%	Yes
1998	363	99%	Yes
1999	365	100%	Yes
2000	357	98%	Yes
2001	347	95%	Yes
2002	59	16%	No
2006	335	92%	Yes
2007	365	100%	Yes
2009	364	100%	Yes
2010	365	100%	Yes
2011	365	100%	Yes
2012	361	99%	Yes

Latest Records

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

Climate Trend

17 complete years, 1977 to 2012

One stripe for each of 17 complete years at Ameca la Vieja, 1977 to 2012. Blue stripes are years cooler than the station's own mean of 17.5 C (63.5 F); red stripes are warmer. The coolest year was 1984, at 16.6 C (61.9 F), and the warmest was 2012, at 18.5 C (65.3 F). The strongest colour marks a difference of 1.0 C (1.8 F).

Annual mean temperature at Ameca la Vieja as warming stripes, 1977 to 2012
Year	Annual mean temperature	Difference from the station mean
1977	17.2 C	-0.33 C
1978	17.2 C	-0.36 C
1983	16.7 C	-0.81 C
1984	16.6 C	-0.92 C
1985	16.7 C	-0.78 C
1995	17.8 C	+0.33 C
1996	17.8 C	+0.29 C
1997	17.3 C	-0.26 C
1998	18.1 C	+0.56 C
1999	18.0 C	+0.47 C
2000	17.7 C	+0.23 C
2001	17.6 C	+0.13 C
2007	17.3 C	-0.18 C
2009	17.9 C	+0.36 C
2010	16.8 C	-0.72 C
2011	18.5 C	+0.98 C
2012	18.5 C	+0.99 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

1976 to 2012

Yearly extremes at Ameca la Vieja: 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)	1989	35.9 C (96.5 F)	32
Coldest night (TNn)	-10.0 C (14.0 F)	1997	-4.7 C (23.5 F)	32
Wettest day (Rx1day)	72.9 mm (2.9 in)	1987	40.4 mm (1.6 in)	32
Wettest five days (Rx5day)	156.2 mm (6.1 in)	1987	74.9 mm (2.9 in)	32
Longest dry spell (CDD)	181 days	1991	82 days	32

Hottest day (TXx)

The hottest day of the year at Ameca la Vieja, 1976 to 2012. The record is 40.6 C (105.1 F) in 1989, marked on the chart; the median year is 35.9 C (96.5 F).

Hottest day (TXx) at Ameca la Vieja by year
Year	Hottest day (TXx)
1976	25.0 C (77.0 F)
1977	33.9 C (93.0 F)
1978	33.9 C (93.0 F)
1980	38.9 C (102.0 F)
1981	32.8 C (91.0 F)
1982	36.7 C (98.1 F)
1983	35.6 C (96.1 F)
1984	35.0 C (95.0 F)
1985	35.6 C (96.1 F)
1986	33.9 C (93.0 F)
1987	32.8 C (91.0 F)
1988	40.0 C (104.0 F)
1989	40.6 C (105.1 F)
1990	36.7 C (98.1 F)
1991	38.9 C (102.0 F)
1992	36.7 C (98.1 F)
1993	36.7 C (98.1 F)
1994	35.0 C (95.0 F)
1995	36.7 C (98.1 F)
1996	35.6 C (96.1 F)
1997	35.0 C (95.0 F)
1998	36.7 C (98.1 F)
1999	36.7 C (98.1 F)
2000	35.6 C (96.1 F)
2001	36.7 C (98.1 F)
2002	28.9 C (84.0 F)
2006	35.6 C (96.1 F)
2007	35.6 C (96.1 F)
2009	37.2 C (99.0 F)
2010	36.1 C (97.0 F)
2011	37.8 C (100.0 F)
2012	36.7 C (98.1 F)

Coldest night (TNn)

The coldest night of the year at Ameca la Vieja, 1976 to 2012. The record is -10.0 C (14.0 F) in 1997, marked on the chart; the median year is -4.7 C (23.5 F).

Coldest night (TNn) at Ameca la Vieja by year
Year	Coldest night (TNn)
1976	0.6 C (33.1 F)
1977	0.0 C (32.0 F)
1978	-2.2 C (28.0 F)
1980	-2.2 C (28.0 F)
1981	-3.3 C (26.1 F)
1982	-5.0 C (23.0 F)
1983	-4.4 C (24.1 F)
1984	-2.8 C (27.0 F)
1985	-7.2 C (19.0 F)
1986	-5.0 C (23.0 F)
1987	-7.2 C (19.0 F)
1988	-6.1 C (21.0 F)
1989	-5.0 C (23.0 F)
1990	-4.4 C (24.1 F)
1991	-5.0 C (23.0 F)
1992	1.7 C (35.1 F)
1993	-2.2 C (28.0 F)
1994	1.7 C (35.1 F)
1995	-5.0 C (23.0 F)
1996	-3.3 C (26.1 F)
1997	-10.0 C (14.0 F)
1998	-5.0 C (23.0 F)
1999	-5.0 C (23.0 F)
2000	-6.1 C (21.0 F)
2001	-6.1 C (21.0 F)
2002	-5.0 C (23.0 F)
2006	-4.4 C (24.1 F)
2007	-3.3 C (26.1 F)
2009	-3.9 C (25.0 F)
2010	-5.0 C (23.0 F)
2011	-5.6 C (21.9 F)
2012	-2.2 C (28.0 F)

Wettest day (Rx1day)

The wettest day of the year at Ameca la Vieja, 1976 to 2012. The record is 72.9 mm (2.9 in) in 1987, marked on the chart; the median year is 40.4 mm (1.6 in).

Wettest day (Rx1day) at Ameca la Vieja by year
Year	Wettest day (Rx1day)
1976	25.9 mm (1.0 in)
1977	30.0 mm (1.2 in)
1978	39.9 mm (1.6 in)
1980	32.8 mm (1.3 in)
1981	25.7 mm (1.0 in)
1982	43.2 mm (1.7 in)
1983	45.0 mm (1.8 in)
1984	63.0 mm (2.5 in)
1985	39.9 mm (1.6 in)
1986	58.9 mm (2.3 in)
1987	72.9 mm (2.9 in)
1988	32.8 mm (1.3 in)
1989	30.0 mm (1.2 in)
1990	40.9 mm (1.6 in)
1991	36.8 mm (1.4 in)
1992	42.9 mm (1.7 in)
1993	14.7 mm (0.6 in)
1994	42.4 mm (1.7 in)
1995	25.4 mm (1.0 in)
1996	40.9 mm (1.6 in)
1997	41.7 mm (1.6 in)
1998	45.0 mm (1.8 in)
1999	32.3 mm (1.3 in)
2000	51.8 mm (2.0 in)
2001	31.0 mm (1.2 in)
2002	36.3 mm (1.4 in)
2006	30.0 mm (1.2 in)
2007	43.9 mm (1.7 in)
2009	63.5 mm (2.5 in)
2010	62.0 mm (2.4 in)
2011	35.3 mm (1.4 in)
2012	53.8 mm (2.1 in)

Wettest five days (Rx5day)

The wettest five days of the year at Ameca la Vieja, 1976 to 2012. The record is 156.2 mm (6.1 in) in 1987, marked on the chart; the median year is 74.9 mm (2.9 in).

Wettest five days (Rx5day) at Ameca la Vieja by year
Year	Wettest five days (Rx5day)
1976	73.5 mm (2.9 in)
1977	58.2 mm (2.3 in)
1978	70.4 mm (2.8 in)
1980	82.6 mm (3.3 in)
1981	38.6 mm (1.5 in)
1982	83.3 mm (3.3 in)
1983	71.3 mm (2.8 in)
1984	92.3 mm (3.6 in)
1985	106.1 mm (4.2 in)
1986	69.3 mm (2.7 in)
1987	156.2 mm (6.1 in)
1988	76.3 mm (3.0 in)
1989	65.6 mm (2.6 in)
1990	82.1 mm (3.2 in)
1991	75.5 mm (3.0 in)
1992	108.7 mm (4.3 in)
1993	54.6 mm (2.1 in)
1994	69.5 mm (2.7 in)
1995	52.9 mm (2.1 in)
1996	85.4 mm (3.4 in)
1997	61.8 mm (2.4 in)
1998	82.6 mm (3.3 in)
1999	95.8 mm (3.8 in)
2000	119.8 mm (4.7 in)
2001	41.1 mm (1.6 in)
2002	51.0 mm (2.0 in)
2006	74.3 mm (2.9 in)
2007	79.2 mm (3.1 in)
2009	74.0 mm (2.9 in)
2010	77.8 mm (3.1 in)
2011	66.3 mm (2.6 in)
2012	84.8 mm (3.3 in)

Longest dry spell (CDD)

The longest dry spell of the year at Ameca la Vieja, 1976 to 2012. The record is 181 days in 1991, marked on the chart; the median year is 82 days.

Longest dry spell (CDD) at Ameca la Vieja by year
Year	Longest dry spell (CDD)
1976	6 days
1977	87 days
1978	111 days
1980	29 days
1981	35 days
1982	105 days
1983	72 days
1984	98 days
1985	130 days
1986	113 days
1987	77 days
1988	80 days
1989	129 days
1990	62 days
1991	181 days
1992	43 days
1993	72 days
1994	72 days
1995	138 days
1996	99 days
1997	44 days
1998	66 days
1999	147 days
2000	82 days
2001	68 days
2002	40 days
2006	82 days
2007	68 days
2009	131 days
2010	119 days
2011	122 days
2012	93 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 Ameca la Vieja standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Ameca la Vieja 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 2026-10-16 (16 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).