Arperos Weather Records (MXN00011135)

Record envelope, standing records and threshold days for Arperos (MXN00011135), Mexico, with 36 years of record.

Key Facts for Arperos

Arperos (MXN00011135) is a weather station in Mexico at 21.10 latitude and -101.38 longitude, 1,992 m (6,535 ft) above sea level.
The station reports from 1977 to 2012, 36 years of record.
1,464 records set at Arperos still stand.
Records are tracked for tmax, tmin: an element needs 30 years of data to be eligible.
Arperos tied a daily record high maximum temperature of 28.9 C (84.0 F) on 25 December 2012.

About the Station

Location: Mexico, 21.10 latitude, -101.38 longitude.
Elevation: 1,992 m (6,535 ft).
Period of record: 1977 to 2012, 36 years.
Eligible elements: tmax, tmin.

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 Arperos. 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 Arperos, 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)	-4.4 C (24.1 F)	n/a	n/a
Feb	30.6 C (87.1 F)	-5.0 C (23.0 F)	n/a	n/a
Mar	33.9 C (93.0 F)	-3.3 C (26.1 F)	n/a	n/a
Apr	35.0 C (95.0 F)	1.7 C (35.1 F)	n/a	n/a
May	37.8 C (100.0 F)	2.8 C (37.0 F)	n/a	n/a
Jun	37.8 C (100.0 F)	5.0 C (41.0 F)	n/a	n/a
Jul	36.1 C (97.0 F)	6.7 C (44.1 F)	n/a	n/a
Aug	35.6 C (96.1 F)	2.2 C (36.0 F)	n/a	n/a
Sep	35.6 C (96.1 F)	2.8 C (37.0 F)	n/a	n/a
Oct	32.8 C (91.0 F)	0.0 C (32.0 F)	n/a	n/a
Nov	31.7 C (89.1 F)	-5.0 C (23.0 F)	n/a	n/a
Dec	35.0 C (95.0 F)	-5.0 C (23.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Arperos still stand. 1995 holds the most, with 288.

Standing records at Arperos by the year they were set
Year set	Standing records
1977	1
1978	29
1979	114
1980	38
1981	28
1982	38
1983	91
1984	40
1985	34
1986	22
1987	6
1988	14
1989	15
1990	27
1991	34
1993	47
1994	8
1995	288
1997	33
1998	55
1999	54
2000	14
2001	27
2002	20
2003	13
2004	12
2005	24
2006	22
2007	34
2008	36
2009	29
2010	120
2011	70
2012	27

Wettest Day of Each Month

Aug: 85.6 mm (3.4 in)

The wettest day on record for each calendar month at Arperos. The most was 85.6 mm (3.4 in) on 29 August 1988.

Record daily precipitation for each month at Arperos
Month	Record daily precipitation (mm)	Date
Jan	46.5 mm (1.8 in)	26 January 1980
Feb	63.8 mm (2.5 in)	4 February 2010
Mar	9.1 mm (0.36 in)	12 March 2004
Apr	15.0 mm (0.6 in)	16 April 1981
May	42.9 mm (1.7 in)	14 May 2006
Jun	52.1 mm (2.1 in)	23 June 1986
Jul	58.7 mm (2.3 in)	1 July 1984
Aug	85.6 mm (3.4 in)	29 August 1988
Sep	68.1 mm (2.7 in)	7 September 2003
Oct	53.8 mm (2.1 in)	20 October 2002
Nov	41.1 mm (1.6 in)	4 November 2002
Dec	17.8 mm (0.7 in)	2 December 1979

Period of Record Coverage

1977 to 2012

35 years of record at Arperos, 1977 to 2012. 19 years have data for under 90 percent of days and are left out of rankings: 1977, 1978, 1980, 1981, 1986, 1987, 1988, 1989 and others.

Days with data per year at Arperos
Year	Days with data	Share of year	Complete
1977	31	8%	No
1978	166	45%	No
1979	360	99%	Yes
1980	290	79%	No
1981	288	79%	No
1982	365	100%	Yes
1983	365	100%	Yes
1984	365	100%	Yes
1985	365	100%	Yes
1986	297	81%	No
1987	242	66%	No
1988	274	75%	No
1989	294	81%	No
1990	365	100%	Yes
1991	212	58%	No
1992	121	33%	No
1993	184	50%	No
1994	241	66%	No
1995	319	87%	No
1997	118	32%	No
1998	243	67%	No
1999	306	84%	No
2000	274	75%	No
2001	304	83%	No
2002	314	86%	No
2003	365	100%	Yes
2004	366	100%	Yes
2005	365	100%	Yes
2006	335	92%	Yes
2007	365	100%	Yes
2008	366	100%	Yes
2009	365	100%	Yes
2010	364	100%	Yes
2011	365	100%	Yes
2012	335	92%	Yes

Latest Records

Latest records at Arperos
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
25 December 2012	Arperos, MX	daily high max (Tie)	28.9 C (84.0 F)	tie	13 years	1 of 100 (Routine)
10 December 2012	Arperos, MX	daily high min (Tie)	8.9 C (48.0 F)	tie	33 years	3 of 100 (Routine)
6 December 2012	Arperos, MX	daily low max	18.9 C (66.0 F)	0.5 C (0.9 F)	33 years	13 of 100 (Routine)
21 November 2012	Arperos, MX	daily high min	11.7 C (53.1 F)	1.7 C (3.1 F)	30 years	17 of 100 (Routine)
14 November 2012	Arperos, MX	daily high min (Tie)	10.6 C (51.1 F)	tie	19 years	2 of 100 (Routine)
11 November 2012	Arperos, MX	daily high min (Tie)	10.6 C (51.1 F)	tie	19 years	2 of 100 (Routine)
5 October 2012	Arperos, MX	daily low min	5.0 C (41.0 F)	0.6 C (1.1 F)	15 years	9 of 100 (Routine)
3 October 2012	Arperos, MX	daily low min	5.6 C (42.1 F)	1.6 C (2.9 F)	15 years	12 of 100 (Routine)
28 September 2012	Arperos, MX	daily low max (Tie)	22.8 C (73.0 F)	tie	28 years	2 of 100 (Routine)
19 September 2012	Arperos, MX	daily low min (Tie)	8.9 C (48.0 F)	tie	4 years	1 of 100 (Routine)
8 September 2012	Arperos, MX	daily high min (Tie)	15.0 C (59.0 F)	tie	29 years	2 of 100 (Routine)
5 September 2012	Arperos, MX	daily low min	6.7 C (44.1 F)	1.1 C (2.0 F)	15 years	11 of 100 (Routine)
25 August 2012	Arperos, MX	daily high min (Tie)	15.6 C (60.1 F)	tie	31 years	3 of 100 (Routine)
20 August 2012	Arperos, MX	daily low max	22.8 C (73.0 F)	0.5 C (0.9 F)	17 years	9 of 100 (Routine)
15 August 2012	Arperos, MX	daily high min (Tie)	15.0 C (59.0 F)	tie	31 years	3 of 100 (Routine)
12 August 2012	Arperos, MX	daily high min (Tie)	15.0 C (59.0 F)	tie	11 years	1 of 100 (Routine)
9 August 2012	Arperos, MX	daily high min	16.7 C (62.1 F)	2.3 C (4.1 F)	34 years	23 of 100 (Routine)
8 August 2012	Arperos, MX	daily high min	15.6 C (60.1 F)	1.2 C (2.2 F)	34 years	18 of 100 (Routine)
21 July 2012	Arperos, MX	daily low max	20.0 C (68.0 F)	1.1 C (2.0 F)	34 years	16 of 100 (Routine)
15 July 2012	Arperos, MX	daily low max	20.0 C (68.0 F)	0.6 C (1.1 F)	28 years	12 of 100 (Routine)

Climate Trend

14 complete years, 1979 to 2011

One stripe for each of 14 complete years at Arperos, 1979 to 2011. Blue stripes are years cooler than the station's own mean of 17.2 C (62.9 F); red stripes are warmer. The coolest year was 2011, at 15.4 C (59.8 F), and the warmest was 1990, at 18.6 C (65.4 F). The strongest colour marks a difference of 1.8 C (3.2 F).

Annual mean temperature at Arperos as warming stripes, 1979 to 2011
Year	Annual mean temperature	Difference from the station mean
1979	17.3 C	+0.12 C
1982	18.0 C	+0.86 C
1983	17.4 C	+0.24 C
1984	16.4 C	-0.71 C
1985	16.7 C	-0.45 C
1990	18.6 C	+1.42 C
2003	17.9 C	+0.74 C
2004	17.5 C	+0.34 C
2005	18.3 C	+1.13 C
2007	16.9 C	-0.22 C
2008	15.8 C	-1.33 C
2009	17.3 C	+0.17 C
2010	16.6 C	-0.52 C
2011	15.4 C	-1.72 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

1977 to 2012

Yearly extremes at Arperos: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	37.8 C (100.0 F)	1980	33.9 C (93.0 F)	35
Coldest night (TNn)	-5.0 C (23.0 F)	2010	-1.1 C (30.0 F)	35
Wettest day (Rx1day)	85.6 mm (3.4 in)	1988	39.9 mm (1.6 in)	34
Wettest five days (Rx5day)	229.5 mm (9.0 in)	2003	88.5 mm (3.5 in)	34
Longest dry spell (CDD)	159 days	1998	73 days	34

Hottest day (TXx)

The hottest day of the year at Arperos, 1977 to 2012. The record is 37.8 C (100.0 F) in 1980, marked on the chart; the median year is 33.9 C (93.0 F).

Hottest day (TXx) at Arperos by year
Year	Hottest day (TXx)
1977	26.7 C (80.1 F)
1978	28.9 C (84.0 F)
1979	35.0 C (95.0 F)
1980	37.8 C (100.0 F)
1981	36.7 C (98.1 F)
1982	35.0 C (95.0 F)
1983	37.2 C (99.0 F)
1984	34.4 C (93.9 F)
1985	35.0 C (95.0 F)
1986	32.2 C (90.0 F)
1987	31.7 C (89.1 F)
1988	34.4 C (93.9 F)
1989	32.2 C (90.0 F)
1990	33.9 C (93.0 F)
1991	36.1 C (97.0 F)
1992	30.0 C (86.0 F)
1993	32.2 C (90.0 F)
1994	33.9 C (93.0 F)
1995	35.0 C (95.0 F)
1997	35.0 C (95.0 F)
1998	32.8 C (91.0 F)
1999	37.8 C (100.0 F)
2000	35.0 C (95.0 F)
2001	35.0 C (95.0 F)
2002	31.7 C (89.1 F)
2003	35.0 C (95.0 F)
2004	32.8 C (91.0 F)
2005	35.0 C (95.0 F)
2006	30.6 C (87.1 F)
2007	32.8 C (91.0 F)
2008	32.8 C (91.0 F)
2009	31.7 C (89.1 F)
2010	35.6 C (96.1 F)
2011	31.7 C (89.1 F)
2012	30.6 C (87.1 F)

Coldest night (TNn)

The coldest night of the year at Arperos, 1977 to 2012. The record is -5.0 C (23.0 F) in 2010, marked on the chart; the median year is -1.1 C (30.0 F).

Coldest night (TNn) at Arperos by year
Year	Coldest night (TNn)
1977	-2.8 C (27.0 F)
1978	1.7 C (35.1 F)
1979	0.0 C (32.0 F)
1980	0.0 C (32.0 F)
1981	0.6 C (33.1 F)
1982	-1.7 C (28.9 F)
1983	-3.9 C (25.0 F)
1984	-2.2 C (28.0 F)
1985	-3.9 C (25.0 F)
1986	-2.2 C (28.0 F)
1987	-3.3 C (26.1 F)
1988	1.7 C (35.1 F)
1989	0.0 C (32.0 F)
1990	-4.4 C (24.1 F)
1991	0.0 C (32.0 F)
1992	5.6 C (42.1 F)
1993	0.6 C (33.1 F)
1994	3.9 C (39.0 F)
1995	0.6 C (33.1 F)
1997	1.7 C (35.1 F)
1998	-1.1 C (30.0 F)
1999	0.6 C (33.1 F)
2000	0.0 C (32.0 F)
2001	-1.1 C (30.0 F)
2002	0.6 C (33.1 F)
2003	-2.2 C (28.0 F)
2004	-1.1 C (30.0 F)
2005	-0.6 C (30.9 F)
2006	-3.3 C (26.1 F)
2007	-2.2 C (28.0 F)
2008	-2.2 C (28.0 F)
2009	-2.2 C (28.0 F)
2010	-5.0 C (23.0 F)
2011	-5.0 C (23.0 F)
2012	-3.3 C (26.1 F)

Wettest day (Rx1day)

The wettest day of the year at Arperos, 1977 to 2012. The record is 85.6 mm (3.4 in) in 1988, marked on the chart; the median year is 39.9 mm (1.6 in).

Wettest day (Rx1day) at Arperos by year
Year	Wettest day (Rx1day)
1977	4.8 mm (0.19 in)
1978	33.8 mm (1.3 in)
1979	24.9 mm (1.0 in)
1980	46.5 mm (1.8 in)
1981	58.2 mm (2.3 in)
1982	29.5 mm (1.2 in)
1983	40.6 mm (1.6 in)
1984	58.7 mm (2.3 in)
1985	39.9 mm (1.6 in)
1986	52.1 mm (2.1 in)
1987	11.4 mm (0.4 in)
1988	85.6 mm (3.4 in)
1989	29.2 mm (1.1 in)
1990	42.9 mm (1.7 in)
1991	n/a
1992	0.0 mm (0.00 in)
1993	3.8 mm (0.15 in)
1994	30.0 mm (1.2 in)
1995	31.0 mm (1.2 in)
1997	39.9 mm (1.6 in)
1998	23.9 mm (0.9 in)
1999	19.1 mm (0.8 in)
2000	40.4 mm (1.6 in)
2001	31.8 mm (1.3 in)
2002	54.9 mm (2.2 in)
2003	77.2 mm (3.0 in)
2004	49.8 mm (2.0 in)
2005	54.9 mm (2.2 in)
2006	53.8 mm (2.1 in)
2007	32.8 mm (1.3 in)
2008	59.2 mm (2.3 in)
2009	64.0 mm (2.5 in)
2010	63.8 mm (2.5 in)
2011	22.1 mm (0.9 in)
2012	39.9 mm (1.6 in)

Wettest five days (Rx5day)

The wettest five days of the year at Arperos, 1977 to 2012. The record is 229.5 mm (9.0 in) in 2003, marked on the chart; the median year is 88.5 mm (3.5 in).

Wettest five days (Rx5day) at Arperos by year
Year	Wettest five days (Rx5day)
1977	4.8 mm (0.19 in)
1978	75.4 mm (3.0 in)
1979	59.4 mm (2.3 in)
1980	98.8 mm (3.9 in)
1981	104.5 mm (4.1 in)
1982	67.2 mm (2.6 in)
1983	112.8 mm (4.4 in)
1984	144.5 mm (5.7 in)
1985	102.3 mm (4.0 in)
1986	112.5 mm (4.4 in)
1987	12.2 mm (0.5 in)
1988	146.1 mm (5.8 in)
1989	58.9 mm (2.3 in)
1990	70.9 mm (2.8 in)
1991	n/a
1992	0.0 mm (0.00 in)
1993	8.4 mm (0.33 in)
1994	55.4 mm (2.2 in)
1995	68.9 mm (2.7 in)
1997	109.8 mm (4.3 in)
1998	46.3 mm (1.8 in)
1999	24.3 mm (1.0 in)
2000	89.9 mm (3.5 in)
2001	87.0 mm (3.4 in)
2002	129.6 mm (5.1 in)
2003	229.5 mm (9.0 in)
2004	149.9 mm (5.9 in)
2005	134.1 mm (5.3 in)
2006	102.9 mm (4.1 in)
2007	73.5 mm (2.9 in)
2008	164.4 mm (6.5 in)
2009	113.4 mm (4.5 in)
2010	114.6 mm (4.5 in)
2011	38.3 mm (1.5 in)
2012	62.6 mm (2.5 in)

Longest dry spell (CDD)

The longest dry spell of the year at Arperos, 1977 to 2012. The record is 159 days in 1998, marked on the chart; the median year is 73 days.

Longest dry spell (CDD) at Arperos by year
Year	Longest dry spell (CDD)
1977	44 days
1978	84 days
1979	63 days
1980	34 days
1981	61 days
1982	54 days
1983	72 days
1984	68 days
1985	48 days
1986	52 days
1987	93 days
1988	144 days
1989	141 days
1990	109 days
1991	n/a
1992	92 days
1993	26 days
1994	31 days
1995	61 days
1997	50 days
1998	159 days
1999	102 days
2000	126 days
2001	68 days
2002	66 days
2003	124 days
2004	74 days
2005	146 days
2006	132 days
2007	50 days
2008	76 days
2009	62 days
2010	100 days
2011	101 days
2012	75 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 Arperos standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Arperos 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).