San Mateo Acuitlapilco Weather Records (MXN00015099)

Record envelope, standing records and threshold days for San Mateo Acuitlapilco (MXN00015099), Mexico, with 52 years of record.

Key Facts for San Mateo Acuitlapilco

San Mateo Acuitlapilco (MXN00015099) is a weather station in Mexico at 19.75 latitude and -99.03 longitude, 2,250 m (7,381 ft) above sea level.
The station reports from 1961 to 2012, 52 years of record.
1,464 records set at San Mateo Acuitlapilco still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
San Mateo Acuitlapilco set a daily record precipitation of 56.1 mm (2.2 in) on 16 September 2012.

About the Station

Location: Mexico, 19.75 latitude, -99.03 longitude.
Elevation: 2,250 m (7,381 ft).
Period of record: 1961 to 2012, 52 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 San Mateo Acuitlapilco. 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 San Mateo Acuitlapilco, 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)	-7.2 C (19.0 F)	n/a	n/a
Feb	31.1 C (88.0 F)	-7.8 C (18.0 F)	n/a	n/a
Mar	33.3 C (91.9 F)	-5.0 C (23.0 F)	n/a	n/a
Apr	36.7 C (98.1 F)	0.0 C (32.0 F)	n/a	n/a
May	35.6 C (96.1 F)	2.8 C (37.0 F)	n/a	n/a
Jun	35.6 C (96.1 F)	1.7 C (35.1 F)	n/a	n/a
Jul	31.7 C (89.1 F)	3.9 C (39.0 F)	n/a	n/a
Aug	31.7 C (89.1 F)	3.3 C (37.9 F)	n/a	n/a
Sep	31.7 C (89.1 F)	-2.2 C (28.0 F)	n/a	n/a
Oct	30.0 C (86.0 F)	-3.3 C (26.1 F)	n/a	n/a
Nov	28.9 C (84.0 F)	-6.1 C (21.0 F)	n/a	n/a
Dec	28.9 C (84.0 F)	-7.2 C (19.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at San Mateo Acuitlapilco still stand. 1998 holds the most, with 111.

Standing records at San Mateo Acuitlapilco by the year they were set
Year set	Standing records
1976	18
1977	57
1978	58
1979	69
1980	44
1981	65
1982	76
1983	97
1984	51
1985	44
1986	57
1987	74
1988	6
1996	3
1997	52
1998	111
1999	64
2001	60
2002	61
2003	61
2004	20
2005	57
2006	36
2007	21
2008	44
2009	54
2010	41
2011	49
2012	14

All-Time Record Progression

1 new records

1 all-time records were set at San Mateo Acuitlapilco between 4 April 2002 and 4 April 2002. Each dot is a new record.

Wettest Day of Each Month

Apr: 94.0 mm (3.7 in)

The wettest day on record for each calendar month at San Mateo Acuitlapilco. The most was 94.0 mm (3.7 in) on 4 April 2002.

Record daily precipitation for each month at San Mateo Acuitlapilco
Month	Record daily precipitation (mm)	Date
Jan	39.9 mm (1.6 in)	11 January 1967
Feb	26.9 mm (1.1 in)	10 February 2001
Mar	45.0 mm (1.8 in)	27 March 1985
Apr	94.0 mm (3.7 in)	4 April 2002
May	64.8 mm (2.6 in)	20 May 1966
Jun	89.9 mm (3.5 in)	5 June 1986
Jul	49.3 mm (1.9 in)	14 July 1983
Aug	72.9 mm (2.9 in)	3 August 1983
Sep	80.3 mm (3.2 in)	13 September 2009
Oct	93.0 mm (3.7 in)	10 October 1981
Nov	34.8 mm (1.4 in)	1 November 2003
Dec	24.9 mm (1.0 in)	2 December 1963

Period of Record Coverage

1976 to 2012

29 years of record at San Mateo Acuitlapilco, 1976 to 2012. 7 years have data for under 90 percent of days and are left out of rankings: 1976, 1988, 1996, 2004, 2007, 2010, 2012.

Days with data per year at San Mateo Acuitlapilco
Year	Days with data	Share of year	Complete
1976	61	17%	No
1977	365	100%	Yes
1978	362	99%	Yes
1979	334	92%	Yes
1980	366	100%	Yes
1981	365	100%	Yes
1982	365	100%	Yes
1983	365	100%	Yes
1984	335	92%	Yes
1985	365	100%	Yes
1986	364	100%	Yes
1987	364	100%	Yes
1988	31	8%	No
1996	61	17%	No
1997	365	100%	Yes
1998	365	100%	Yes
1999	364	100%	Yes
2001	334	92%	Yes
2002	365	100%	Yes
2003	363	99%	Yes
2004	213	58%	No
2005	365	100%	Yes
2006	365	100%	Yes
2007	273	75%	No
2008	364	99%	Yes
2009	364	100%	Yes
2010	241	66%	No
2011	365	100%	Yes
2012	244	67%	No

Latest Records

Latest records at San Mateo Acuitlapilco
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
16 September 2012	San Mateo Acuitlapilco, MX	daily rain	56.1 mm (2.2 in)	33.2 mm (1.3 in)	49 years	53 of 100 (Notable)
10 August 2012	San Mateo Acuitlapilco, MX	daily rain	38.4 mm (1.5 in)	15.0 mm (0.6 in)	30 years	29 of 100 (Routine)
27 July 2012	San Mateo Acuitlapilco, MX	daily rain	39.9 mm (1.6 in)	22.1 mm (0.9 in)	31 years	37 of 100 (Notable)
17 July 2012	San Mateo Acuitlapilco, MX	daily rain	29.2 mm (1.1 in)	0.8 mm (0.03 in)	13 years	8 of 100 (Routine)
9 April 2012	San Mateo Acuitlapilco, MX	daily rain	15.0 mm (0.6 in)	1.0 mm (0.04 in)	15 years	10 of 100 (Routine)
25 February 2012	San Mateo Acuitlapilco, MX	daily rain	5.8 mm (0.23 in)	4.0 mm (0.16 in)	29 years	18 of 100 (Routine)
24 February 2012	San Mateo Acuitlapilco, MX	daily rain	7.1 mm (0.28 in)	7.1 mm (0.28 in)	50 years	20 of 100 (Routine)
16 February 2012	San Mateo Acuitlapilco, MX	daily rain	1.8 mm (0.07 in)	1.8 mm (0.07 in)	50 years	20 of 100 (Routine)
13 February 2012	San Mateo Acuitlapilco, MX	daily rain	4.8 mm (0.19 in)	4.8 mm (0.19 in)	50 years	20 of 100 (Routine)
8 February 2012	San Mateo Acuitlapilco, MX	daily rain	7.4 mm (0.29 in)	0.5 mm (0.02 in)	28 years	13 of 100 (Routine)
7 February 2012	San Mateo Acuitlapilco, MX	daily rain	1.8 mm (0.07 in)	1.0 mm (0.04 in)	33 years	16 of 100 (Routine)
31 January 2012	San Mateo Acuitlapilco, MX	daily rain	4.8 mm (0.19 in)	2.8 mm (0.11 in)	1 year	8 of 100 (Routine)
29 January 2012	San Mateo Acuitlapilco, MX	daily rain (Tie)	2.3 mm (0.09 in)	tie	6 years	1 of 100 (Routine)
27 November 2011	San Mateo Acuitlapilco, MX	daily rain	11.4 mm (0.4 in)	1.5 mm (0.06 in)	40 years	19 of 100 (Routine)
4 September 2011	San Mateo Acuitlapilco, MX	daily rain	34.3 mm (1.4 in)	1.5 mm (0.06 in)	40 years	18 of 100 (Routine)
3 September 2011	San Mateo Acuitlapilco, MX	daily rain	41.9 mm (1.6 in)	22.1 mm (0.9 in)	48 years	42 of 100 (Notable)
5 August 2011	San Mateo Acuitlapilco, MX	daily rain	26.9 mm (1.1 in)	2.5 mm (0.10 in)	4 years	8 of 100 (Routine)
9 July 2011	San Mateo Acuitlapilco, MX	daily rain	23.9 mm (0.9 in)	1.0 mm (0.04 in)	0 years	6 of 100 (Routine)
30 June 2011	San Mateo Acuitlapilco, MX	daily rain	49.0 mm (1.9 in)	27.2 mm (1.1 in)	4 years	33 of 100 (Routine)
8 May 2011	San Mateo Acuitlapilco, MX	daily rain	19.8 mm (0.8 in)	7.9 mm (0.31 in)	2 years	13 of 100 (Routine)

Climate Trend

19 complete years, 1977 to 2011

One stripe for each of 19 complete years at San Mateo Acuitlapilco, 1977 to 2011. Blue stripes are years cooler than the station's own mean of 16.3 C (61.3 F); red stripes are warmer. The coolest year was 1977, at 15.2 C (59.3 F), and the warmest was 1998, at 17.2 C (62.9 F). The strongest colour marks a difference of 1.1 C (2.0 F).

Annual mean temperature at San Mateo Acuitlapilco as warming stripes, 1977 to 2011
Year	Annual mean temperature	Difference from the station mean
1977	15.2 C	-1.09 C
1978	15.4 C	-0.87 C
1980	15.6 C	-0.69 C
1981	15.5 C	-0.79 C
1982	15.8 C	-0.51 C
1983	16.0 C	-0.24 C
1985	16.0 C	-0.25 C
1986	15.8 C	-0.43 C
1987	16.0 C	-0.25 C
1997	16.0 C	-0.28 C
1998	17.2 C	+0.89 C
1999	15.9 C	-0.38 C
2002	17.0 C	+0.75 C
2003	16.9 C	+0.65 C
2005	17.1 C	+0.79 C
2006	17.1 C	+0.80 C
2008	16.9 C	+0.64 C
2009	17.2 C	+0.88 C
2011	16.6 C	+0.31 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

1961 to 2012

Yearly extremes at San Mateo Acuitlapilco: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	36.7 C (98.1 F)	1982	32.8 C (91.0 F)	29
Coldest night (TNn)	-7.8 C (18.0 F)	1999	-5.0 C (23.0 F)	29
Wettest day (Rx1day)	94.0 mm (3.7 in)	2002	43.2 mm (1.7 in)	44
Wettest five days (Rx5day)	172.2 mm (6.8 in)	2009	77.7 mm (3.1 in)	44
Longest dry spell (CDD)	104 days	1986	60 days	44

Hottest day (TXx)

The hottest day of the year at San Mateo Acuitlapilco, 1961 to 2012. The record is 36.7 C (98.1 F) in 1982, marked on the chart; the median year is 32.8 C (91.0 F).

Hottest day (TXx) at San Mateo Acuitlapilco by year
Year	Hottest day (TXx)
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	n/a
1966	n/a
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	25.0 C (77.0 F)
1977	31.1 C (88.0 F)
1978	32.2 C (90.0 F)
1979	30.6 C (87.1 F)
1980	31.7 C (89.1 F)
1981	31.7 C (89.1 F)
1982	36.7 C (98.1 F)
1983	35.0 C (95.0 F)
1984	34.4 C (93.9 F)
1985	31.7 C (89.1 F)
1986	32.8 C (91.0 F)
1987	31.7 C (89.1 F)
1988	28.9 C (84.0 F)
1996	32.2 C (90.0 F)
1997	32.2 C (90.0 F)
1998	35.6 C (96.1 F)
1999	35.0 C (95.0 F)
2001	33.3 C (91.9 F)
2002	33.3 C (91.9 F)
2003	35.0 C (95.0 F)
2004	32.8 C (91.0 F)
2005	35.6 C (96.1 F)
2006	33.3 C (91.9 F)
2007	32.2 C (90.0 F)
2008	33.9 C (93.0 F)
2009	33.9 C (93.0 F)
2010	33.3 C (91.9 F)
2011	33.3 C (91.9 F)
2012	31.7 C (89.1 F)

Coldest night (TNn)

The coldest night of the year at San Mateo Acuitlapilco, 1961 to 2012. The record is -7.8 C (18.0 F) in 1999, marked on the chart; the median year is -5.0 C (23.0 F).

Coldest night (TNn) at San Mateo Acuitlapilco by year
Year	Coldest night (TNn)
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	n/a
1966	n/a
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	0.0 C (32.0 F)
1977	-5.0 C (23.0 F)
1978	-4.4 C (24.1 F)
1979	-3.9 C (25.0 F)
1980	-6.1 C (21.0 F)
1981	-5.0 C (23.0 F)
1982	-7.2 C (19.0 F)
1983	-6.1 C (21.0 F)
1984	-4.4 C (24.1 F)
1985	-4.4 C (24.1 F)
1986	-7.2 C (19.0 F)
1987	-4.4 C (24.1 F)
1988	-7.2 C (19.0 F)
1996	5.0 C (41.0 F)
1997	-5.0 C (23.0 F)
1998	-7.2 C (19.0 F)
1999	-7.8 C (18.0 F)
2001	-4.4 C (24.1 F)
2002	-5.0 C (23.0 F)
2003	-5.0 C (23.0 F)
2004	-6.1 C (21.0 F)
2005	-3.9 C (25.0 F)
2006	-6.1 C (21.0 F)
2007	-5.0 C (23.0 F)
2008	-3.9 C (25.0 F)
2009	-3.9 C (25.0 F)
2010	0.0 C (32.0 F)
2011	-3.3 C (26.1 F)
2012	0.0 C (32.0 F)

Wettest day (Rx1day)

The wettest day of the year at San Mateo Acuitlapilco, 1961 to 2012. The record is 94.0 mm (3.7 in) in 2002, marked on the chart; the median year is 43.2 mm (1.7 in).

Wettest day (Rx1day) at San Mateo Acuitlapilco by year
Year	Wettest day (Rx1day)
1961	31.5 mm (1.2 in)
1962	40.4 mm (1.6 in)
1963	39.9 mm (1.6 in)
1964	45.0 mm (1.8 in)
1965	71.9 mm (2.8 in)
1966	64.8 mm (2.6 in)
1967	39.9 mm (1.6 in)
1968	49.8 mm (2.0 in)
1969	30.0 mm (1.2 in)
1970	32.8 mm (1.3 in)
1971	32.3 mm (1.3 in)
1972	47.0 mm (1.9 in)
1973	45.5 mm (1.8 in)
1974	41.9 mm (1.6 in)
1975	31.8 mm (1.3 in)
1976	48.8 mm (1.9 in)
1977	47.0 mm (1.9 in)
1978	33.3 mm (1.3 in)
1979	31.0 mm (1.2 in)
1980	41.9 mm (1.6 in)
1981	93.0 mm (3.7 in)
1982	47.0 mm (1.9 in)
1983	72.9 mm (2.9 in)
1984	28.7 mm (1.1 in)
1985	47.8 mm (1.9 in)
1986	89.9 mm (3.5 in)
1987	37.3 mm (1.5 in)
1988	0.0 mm (0.00 in)
1996	45.0 mm (1.8 in)
1997	35.8 mm (1.4 in)
1998	30.0 mm (1.2 in)
1999	35.3 mm (1.4 in)
2001	31.8 mm (1.3 in)
2002	94.0 mm (3.7 in)
2003	63.5 mm (2.5 in)
2004	56.9 mm (2.2 in)
2005	34.3 mm (1.4 in)
2006	44.5 mm (1.8 in)
2007	25.9 mm (1.0 in)
2008	47.0 mm (1.9 in)
2009	80.3 mm (3.2 in)
2010	39.9 mm (1.6 in)
2011	49.0 mm (1.9 in)
2012	56.1 mm (2.2 in)

Wettest five days (Rx5day)

The wettest five days of the year at San Mateo Acuitlapilco, 1961 to 2012. The record is 172.2 mm (6.8 in) in 2009, marked on the chart; the median year is 77.7 mm (3.1 in).

Wettest five days (Rx5day) at San Mateo Acuitlapilco by year
Year	Wettest five days (Rx5day)
1961	54.1 mm (2.1 in)
1962	67.5 mm (2.7 in)
1963	73.1 mm (2.9 in)
1964	60.7 mm (2.4 in)
1965	87.3 mm (3.4 in)
1966	123.5 mm (4.9 in)
1967	82.6 mm (3.3 in)
1968	89.4 mm (3.5 in)
1969	78.9 mm (3.1 in)
1970	84.1 mm (3.3 in)
1971	85.2 mm (3.4 in)
1972	85.0 mm (3.3 in)
1973	121.2 mm (4.8 in)
1974	130.6 mm (5.1 in)
1975	44.2 mm (1.7 in)
1976	85.6 mm (3.4 in)
1977	53.4 mm (2.1 in)
1978	76.5 mm (3.0 in)
1979	72.2 mm (2.8 in)
1980	55.6 mm (2.2 in)
1981	135.4 mm (5.3 in)
1982	71.6 mm (2.8 in)
1983	126.3 mm (5.0 in)
1984	63.2 mm (2.5 in)
1985	60.3 mm (2.4 in)
1986	144.0 mm (5.7 in)
1987	64.5 mm (2.5 in)
1988	0.0 mm (0.00 in)
1996	53.1 mm (2.1 in)
1997	43.0 mm (1.7 in)
1998	76.8 mm (3.0 in)
1999	63.7 mm (2.5 in)
2001	56.6 mm (2.2 in)
2002	98.6 mm (3.9 in)
2003	108.9 mm (4.3 in)
2004	98.7 mm (3.9 in)
2005	75.4 mm (3.0 in)
2006	95.5 mm (3.8 in)
2007	78.5 mm (3.1 in)
2008	136.9 mm (5.4 in)
2009	172.2 mm (6.8 in)
2010	73.2 mm (2.9 in)
2011	103.4 mm (4.1 in)
2012	75.8 mm (3.0 in)

Longest dry spell (CDD)

The longest dry spell of the year at San Mateo Acuitlapilco, 1961 to 2012. The record is 104 days in 1986, marked on the chart; the median year is 60 days.

Longest dry spell (CDD) at San Mateo Acuitlapilco by year
Year	Longest dry spell (CDD)
1961	44 days
1962	101 days
1963	56 days
1964	37 days
1965	73 days
1966	60 days
1967	55 days
1968	76 days
1969	52 days
1970	69 days
1971	76 days
1972	46 days
1973	48 days
1974	40 days
1975	65 days
1976	68 days
1977	62 days
1978	43 days
1979	63 days
1980	33 days
1981	35 days
1982	59 days
1983	63 days
1984	77 days
1985	37 days
1986	104 days
1987	63 days
1988	31 days
1996	21 days
1997	36 days
1998	73 days
1999	75 days
2001	80 days
2002	75 days
2003	90 days
2004	61 days
2005	52 days
2006	50 days
2007	28 days
2008	74 days
2009	33 days
2010	20 days
2011	103 days
2012	28 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

38 years, 1961 to 2011

A day with at least 42.3 mm (1.7 in) of rain is expected about once in 2 years. A day with at least 126.5 mm (5.0 in) of rain is expected about once in 100 years.

Rainfall return levels at San Mateo Acuitlapilco: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	42.3 mm (1.7 in)
5 years	57.2 mm (2.3 in)
10 years	69.5 mm (2.7 in)
25 years	88.7 mm (3.5 in)
50 years	106.1 mm (4.2 in)	Longer than the 38 years of record
100 years	126.5 mm (5.0 in)	Longer than the 38 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, 38 years of values from 1961 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: 94.0 mm (3.7 in) in 2002; 93.0 mm (3.7 in) in 1981; 89.9 mm (3.5 in) in 1986.

Download the Data

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