Los Conos Weather Records (MXN00001033)

Record envelope, standing records and threshold days for Los Conos (MXN00001033), Mexico, with 43 years of record.

Key Facts for Los Conos

Los Conos (MXN00001033) is a weather station in Mexico at 21.88 latitude and -101.98 longitude, 2,026 m (6,646 ft) above sea level.
The station reports from 1971 to 2013, 43 years of record.
1,464 records set at Los Conos still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Los Conos set a daily record high minimum temperature of 15.0 C (59.0 F) on 24 September 2013.

About the Station

Location: Mexico, 21.88 latitude, -101.98 longitude.
Elevation: 2,026 m (6,646 ft).
Period of record: 1971 to 2013, 43 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 Los Conos. 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 Los Conos, 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)	-8.3 C (17.1 F)	n/a	n/a
Feb	33.3 C (91.9 F)	-6.1 C (21.0 F)	n/a	n/a
Mar	33.9 C (93.0 F)	-5.6 C (21.9 F)	n/a	n/a
Apr	37.8 C (100.0 F)	-3.3 C (26.1 F)	n/a	n/a
May	38.9 C (102.0 F)	1.7 C (35.1 F)	n/a	n/a
Jun	37.8 C (100.0 F)	5.0 C (41.0 F)	n/a	n/a
Jul	33.9 C (93.0 F)	5.0 C (41.0 F)	n/a	n/a
Aug	33.9 C (93.0 F)	3.9 C (39.0 F)	n/a	n/a
Sep	31.7 C (89.1 F)	1.7 C (35.1 F)	n/a	n/a
Oct	33.3 C (91.9 F)	-3.3 C (26.1 F)	n/a	n/a
Nov	32.8 C (91.0 F)	-8.9 C (16.0 F)	n/a	n/a
Dec	30.6 C (87.1 F)	-8.3 C (17.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Los Conos still stand. 1976 holds the most, with 80.

Standing records at Los Conos by the year they were set
Year set	Standing records
1972	34
1973	35
1974	46
1975	42
1976	80
1977	29
1978	29
1979	47
1980	41
1981	77
1982	52
1983	25
1984	56
1985	32
1986	63
1987	54
1988	20
1989	18
1990	8
1991	27
1992	25
1993	13
1994	7
1995	31
1996	10
1997	22
1998	39
1999	29
2000	26
2001	14
2002	24
2003	23
2004	16
2005	33
2006	29
2007	14
2008	32
2009	63
2010	65
2011	80
2012	31
2013	23

All-Time Record Progression

4 new records

4 all-time records were set at Los Conos between 24 May 2005 and 29 November 2011. Each dot is a new record.

When Los Conos set new all-time records
Date	Kind	Detail
2005-05-24	Record high maximum temperature	Record high maximum temperature 38.9 C (102.0 F)
2010-01-15	Record low maximum temperature	Record low maximum temperature 7.8 C (46.0 F)
2011-09-02	Record daily precipitation	Record daily precipitation 85.3 mm (3.4 in)
2011-11-29	Record low minimum temperature	Record low minimum temperature -8.9 C (16.0 F)

Wettest Day of Each Month

Sep: 85.3 mm (3.4 in)

The wettest day on record for each calendar month at Los Conos. The most was 85.3 mm (3.4 in) on 2 September 2011.

Record daily precipitation for each month at Los Conos
Month	Record daily precipitation (mm)	Date
Jan	51.8 mm (2.0 in)	12 January 2002
Feb	42.7 mm (1.7 in)	3 February 2010
Mar	22.9 mm (0.9 in)	30 March 2004
Apr	28.2 mm (1.1 in)	6 April 1988
May	43.7 mm (1.7 in)	14 May 2013
Jun	66.8 mm (2.6 in)	28 June 1973
Jul	74.4 mm (2.9 in)	5 July 2008
Aug	77.0 mm (3.0 in)	11 August 1978
Sep	85.3 mm (3.4 in)	2 September 2011
Oct	52.1 mm (2.1 in)	20 October 1985
Nov	42.4 mm (1.7 in)	13 November 1992
Dec	27.4 mm (1.1 in)	2 December 1979

Period of Record Coverage

1972 to 2013

42 years of record at Los Conos, 1972 to 2013. 2 years have data for under 90 percent of days and are left out of rankings: 1972, 2013.

Days with data per year at Los Conos
Year	Days with data	Share of year	Complete
1972	283	77%	No
1973	365	100%	Yes
1974	365	100%	Yes
1975	365	100%	Yes
1976	366	100%	Yes
1977	334	92%	Yes
1978	365	100%	Yes
1979	365	100%	Yes
1980	366	100%	Yes
1981	365	100%	Yes
1982	365	100%	Yes
1983	365	100%	Yes
1984	366	100%	Yes
1985	365	100%	Yes
1986	365	100%	Yes
1987	365	100%	Yes
1988	366	100%	Yes
1989	365	100%	Yes
1990	365	100%	Yes
1991	365	100%	Yes
1992	366	100%	Yes
1993	365	100%	Yes
1994	365	100%	Yes
1995	365	100%	Yes
1996	335	92%	Yes
1997	365	100%	Yes
1998	364	100%	Yes
1999	364	100%	Yes
2000	366	100%	Yes
2001	365	100%	Yes
2002	365	100%	Yes
2003	365	100%	Yes
2004	366	100%	Yes
2005	365	100%	Yes
2006	365	100%	Yes
2007	365	100%	Yes
2008	366	100%	Yes
2009	339	93%	Yes
2010	365	100%	Yes
2011	357	98%	Yes
2012	354	97%	Yes
2013	304	83%	No

Latest Records

Latest records at Los Conos
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
24 September 2013	Los Conos, MX	daily high min	15.0 C (59.0 F)	1.1 C (2.0 F)	30 years	17 of 100 (Routine)
23 September 2013	Los Conos, MX	daily high min	15.0 C (59.0 F)	0.6 C (1.1 F)	4 years	7 of 100 (Routine)
23 September 2013	Los Conos, MX	daily high max (Tie)	28.9 C (84.0 F)	tie	6 years	1 of 100 (Routine)
21 September 2013	Los Conos, MX	daily high min	15.6 C (60.1 F)	0.6 C (1.1 F)	30 years	15 of 100 (Routine)
17 September 2013	Los Conos, MX	daily high min (Tie)	15.0 C (59.0 F)	tie	15 years	2 of 100 (Routine)
15 September 2013	Los Conos, MX	daily rain	25.1 mm (1.0 in)	6.8 mm (0.27 in)	0 years	10 of 100 (Routine)
1 September 2013	Los Conos, MX	daily high max (Tie)	30.0 C (86.0 F)	tie	3 years	1 of 100 (Routine)
31 August 2013	Los Conos, MX	daily high max	30.0 C (86.0 F)	1.1 C (2.0 F)	12 years	11 of 100 (Routine)
20 July 2013	Los Conos, MX	daily rain	31.5 mm (1.2 in)	4.3 mm (0.17 in)	15 years	11 of 100 (Routine)
17 July 2013	Los Conos, MX	daily rain	25.4 mm (1.0 in)	1.5 mm (0.06 in)	31 years	14 of 100 (Routine)
4 July 2013	Los Conos, MX	daily high min (Tie)	15.0 C (59.0 F)	tie	32 years	3 of 100 (Routine)
14 June 2013	Los Conos, MX	daily rain	17.0 mm (0.7 in)	5.6 mm (0.22 in)	6 years	9 of 100 (Routine)
13 June 2013	Los Conos, MX	daily rain	36.8 mm (1.4 in)	7.8 mm (0.31 in)	12 years	13 of 100 (Routine)
22 May 2013	Los Conos, MX	daily high max (Tie)	35.0 C (95.0 F)	tie	3 years	1 of 100 (Routine)
14 May 2013	Los Conos, MX	monthly rain	43.7 mm (1.7 in)	13.7 mm (0.5 in)	9 years	38 of 100 (Notable)
30 April 2013	Los Conos, MX	daily low min	3.9 C (39.0 F)	1.1 C (2.0 F)	22 years	13 of 100 (Routine)
26 April 2013	Los Conos, MX	daily rain	0.5 mm (0.02 in)	0.5 mm (0.02 in)	40 years	16 of 100 (Routine)
26 April 2013	Los Conos, MX	daily high max (Tie)	33.9 C (93.0 F)	tie	12 years	1 of 100 (Routine)
24 April 2013	Los Conos, MX	daily low min (Tie)	3.9 C (39.0 F)	tie	4 years	1 of 100 (Routine)
19 April 2013	Los Conos, MX	daily high max (Tie)	35.0 C (95.0 F)	tie	12 years	1 of 100 (Routine)

Climate Trend

37 complete years, 1973 to 2012

One stripe for each of 37 complete years at Los Conos, 1973 to 2012. Blue stripes are years cooler than the station's own mean of 16.6 C (61.9 F); red stripes are warmer. The coolest year was 1975, at 14.8 C (58.6 F), and the warmest was 1982, at 18.4 C (65.1 F). The strongest colour marks a difference of 1.9 C (3.4 F).

Annual mean temperature at Los Conos as warming stripes, 1973 to 2012
Year	Annual mean temperature	Difference from the station mean
1973	15.8 C	-0.86 C
1974	15.4 C	-1.28 C
1975	14.8 C	-1.83 C
1976	16.0 C	-0.68 C
1978	17.2 C	+0.53 C
1979	16.8 C	+0.18 C
1980	17.3 C	+0.68 C
1981	17.8 C	+1.21 C
1982	18.4 C	+1.74 C
1983	17.0 C	+0.36 C
1984	15.9 C	-0.77 C
1985	15.9 C	-0.75 C
1986	16.0 C	-0.61 C
1987	16.2 C	-0.41 C
1988	16.4 C	-0.21 C
1989	16.5 C	-0.09 C
1990	16.5 C	-0.16 C
1991	16.5 C	-0.14 C
1992	16.1 C	-0.56 C
1993	16.7 C	+0.08 C
1994	17.4 C	+0.72 C
1995	17.3 C	+0.69 C
1997	16.8 C	+0.18 C
1998	17.3 C	+0.64 C
1999	16.6 C	+0.01 C
2000	17.0 C	+0.33 C
2001	16.4 C	-0.25 C
2002	16.8 C	+0.15 C
2003	16.8 C	+0.12 C
2004	16.4 C	-0.28 C
2005	16.9 C	+0.26 C
2006	16.8 C	+0.16 C
2007	16.0 C	-0.65 C
2008	15.8 C	-0.88 C
2010	16.7 C	+0.06 C
2011	17.9 C	+1.23 C
2012	17.6 C	+0.93 C

The fitted trend in annual mean temperature here over 1973 to 2012 is 0.17 C (-0.04 to 0.38) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.3 F (-0.1 to 0.7) per decade. The slope is a straight line fitted to 37 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Los Conos
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.17 C (-0.04 to 0.38) per decade	0.3 F (-0.1 to 0.7) per decade	1973 to 2012	37	Not clearly different from zero
Mean daily maximum	0.7 C (0.5 to 1.0) per decade	1.3 F (0.9 to 1.7) per decade	1973 to 2012	37	Rise
Mean daily minimum	-0.4 C (-0.7 to -0.1) per decade	-0.7 F (-1.2 to -0.2) per decade	1973 to 2012	37	Fall

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

1971 to 2013

Yearly extremes at Los Conos: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	38.9 C (102.0 F)	2005	35.0 C (95.0 F)	42
Coldest night (TNn)	-8.9 C (16.0 F)	2011	-4.7 C (23.5 F)	42
Wettest day (Rx1day)	85.3 mm (3.4 in)	2011	47.5 mm (1.9 in)	43
Wettest five days (Rx5day)	168.4 mm (6.6 in)	1976	94.6 mm (3.7 in)	43
Longest dry spell (CDD)	180 days	1978	93 days	43

Hottest day (TXx)

The hottest day of the year at Los Conos, 1971 to 2013. The record is 38.9 C (102.0 F) in 2005, marked on the chart; the median year is 35.0 C (95.0 F).

Hottest day (TXx) at Los Conos by year
Year	Hottest day (TXx)
1971	n/a
1972	31.7 C (89.1 F)
1973	31.7 C (89.1 F)
1974	31.7 C (89.1 F)
1975	31.7 C (89.1 F)
1976	32.8 C (91.0 F)
1977	30.6 C (87.1 F)
1978	33.3 C (91.9 F)
1979	33.9 C (93.0 F)
1980	33.9 C (93.0 F)
1981	32.8 C (91.0 F)
1982	35.0 C (95.0 F)
1983	35.0 C (95.0 F)
1984	32.8 C (91.0 F)
1985	33.9 C (93.0 F)
1986	35.0 C (95.0 F)
1987	31.7 C (89.1 F)
1988	33.9 C (93.0 F)
1989	33.9 C (93.0 F)
1990	32.8 C (91.0 F)
1991	33.9 C (93.0 F)
1992	32.8 C (91.0 F)
1993	35.0 C (95.0 F)
1994	35.0 C (95.0 F)
1995	35.0 C (95.0 F)
1996	35.0 C (95.0 F)
1997	33.9 C (93.0 F)
1998	36.7 C (98.1 F)
1999	35.0 C (95.0 F)
2000	35.0 C (95.0 F)
2001	37.8 C (100.0 F)
2002	35.0 C (95.0 F)
2003	36.7 C (98.1 F)
2004	35.0 C (95.0 F)
2005	38.9 C (102.0 F)
2006	35.0 C (95.0 F)
2007	33.9 C (93.0 F)
2008	35.0 C (95.0 F)
2009	35.0 C (95.0 F)
2010	37.8 C (100.0 F)
2011	38.3 C (100.9 F)
2012	37.8 C (100.0 F)
2013	35.0 C (95.0 F)

Coldest night (TNn)

The coldest night of the year at Los Conos, 1971 to 2013. The record is -8.9 C (16.0 F) in 2011, marked on the chart; the median year is -4.7 C (23.5 F).

Coldest night (TNn) at Los Conos by year
Year	Coldest night (TNn)
1971	n/a
1972	-1.7 C (28.9 F)
1973	-7.2 C (19.0 F)
1974	-7.2 C (19.0 F)
1975	-8.3 C (17.1 F)
1976	-5.0 C (23.0 F)
1977	-3.3 C (26.1 F)
1978	-2.2 C (28.0 F)
1979	-5.0 C (23.0 F)
1980	-3.3 C (26.1 F)
1981	-3.3 C (26.1 F)
1982	-2.8 C (27.0 F)
1983	-2.2 C (28.0 F)
1984	-2.2 C (28.0 F)
1985	-6.1 C (21.0 F)
1986	-5.0 C (23.0 F)
1987	-3.3 C (26.1 F)
1988	-6.1 C (21.0 F)
1989	-5.0 C (23.0 F)
1990	-3.3 C (26.1 F)
1991	-3.3 C (26.1 F)
1992	-2.2 C (28.0 F)
1993	-3.3 C (26.1 F)
1994	-4.4 C (24.1 F)
1995	-4.4 C (24.1 F)
1996	-3.3 C (26.1 F)
1997	-7.2 C (19.0 F)
1998	-6.1 C (21.0 F)
1999	-5.0 C (23.0 F)
2000	-5.0 C (23.0 F)
2001	-4.4 C (24.1 F)
2002	-5.0 C (23.0 F)
2003	-8.3 C (17.1 F)
2004	-6.1 C (21.0 F)
2005	-4.4 C (24.1 F)
2006	-8.3 C (17.1 F)
2007	-4.4 C (24.1 F)
2008	-6.7 C (19.9 F)
2009	-4.4 C (24.1 F)
2010	-6.1 C (21.0 F)
2011	-8.9 C (16.0 F)
2012	-4.4 C (24.1 F)
2013	-5.6 C (21.9 F)

Wettest day (Rx1day)

The wettest day of the year at Los Conos, 1971 to 2013. The record is 85.3 mm (3.4 in) in 2011, marked on the chart; the median year is 47.5 mm (1.9 in).

Wettest day (Rx1day) at Los Conos by year
Year	Wettest day (Rx1day)
1971	32.3 mm (1.3 in)
1972	51.8 mm (2.0 in)
1973	66.8 mm (2.6 in)
1974	47.0 mm (1.9 in)
1975	61.0 mm (2.4 in)
1976	51.8 mm (2.0 in)
1977	31.8 mm (1.3 in)
1978	77.0 mm (3.0 in)
1979	51.8 mm (2.0 in)
1980	52.8 mm (2.1 in)
1981	24.9 mm (1.0 in)
1982	27.9 mm (1.1 in)
1983	33.8 mm (1.3 in)
1984	36.3 mm (1.4 in)
1985	52.1 mm (2.1 in)
1986	66.3 mm (2.6 in)
1987	36.8 mm (1.4 in)
1988	37.1 mm (1.5 in)
1989	39.9 mm (1.6 in)
1990	61.0 mm (2.4 in)
1991	40.9 mm (1.6 in)
1992	77.0 mm (3.0 in)
1993	50.8 mm (2.0 in)
1994	30.0 mm (1.2 in)
1995	46.5 mm (1.8 in)
1996	43.4 mm (1.7 in)
1997	34.3 mm (1.4 in)
1998	48.3 mm (1.9 in)
1999	42.9 mm (1.7 in)
2000	47.5 mm (1.9 in)
2001	59.9 mm (2.4 in)
2002	61.5 mm (2.4 in)
2003	48.8 mm (1.9 in)
2004	51.8 mm (2.0 in)
2005	31.8 mm (1.3 in)
2006	46.7 mm (1.8 in)
2007	47.0 mm (1.9 in)
2008	74.4 mm (2.9 in)
2009	53.1 mm (2.1 in)
2010	42.7 mm (1.7 in)
2011	85.3 mm (3.4 in)
2012	47.5 mm (1.9 in)
2013	49.3 mm (1.9 in)

Wettest five days (Rx5day)

The wettest five days of the year at Los Conos, 1971 to 2013. The record is 168.4 mm (6.6 in) in 1976, marked on the chart; the median year is 94.6 mm (3.7 in).

Wettest five days (Rx5day) at Los Conos by year
Year	Wettest five days (Rx5day)
1971	55.9 mm (2.2 in)
1972	132.3 mm (5.2 in)
1973	112.8 mm (4.4 in)
1974	88.4 mm (3.5 in)
1975	127.6 mm (5.0 in)
1976	168.4 mm (6.6 in)
1977	100.4 mm (4.0 in)
1978	117.3 mm (4.6 in)
1979	78.3 mm (3.1 in)
1980	101.0 mm (4.0 in)
1981	43.5 mm (1.7 in)
1982	62.2 mm (2.4 in)
1983	57.7 mm (2.3 in)
1984	70.6 mm (2.8 in)
1985	97.7 mm (3.8 in)
1986	144.1 mm (5.7 in)
1987	71.2 mm (2.8 in)
1988	92.2 mm (3.6 in)
1989	66.6 mm (2.6 in)
1990	85.2 mm (3.4 in)
1991	121.4 mm (4.8 in)
1992	117.9 mm (4.6 in)
1993	75.4 mm (3.0 in)
1994	67.6 mm (2.7 in)
1995	89.3 mm (3.5 in)
1996	67.1 mm (2.6 in)
1997	79.3 mm (3.1 in)
1998	146.4 mm (5.8 in)
1999	94.6 mm (3.7 in)
2000	101.7 mm (4.0 in)
2001	109.2 mm (4.3 in)
2002	99.6 mm (3.9 in)
2003	88.4 mm (3.5 in)
2004	133.9 mm (5.3 in)
2005	44.8 mm (1.8 in)
2006	81.3 mm (3.2 in)
2007	121.4 mm (4.8 in)
2008	150.4 mm (5.9 in)
2009	69.2 mm (2.7 in)
2010	116.1 mm (4.6 in)
2011	104.9 mm (4.1 in)
2012	79.4 mm (3.1 in)
2013	125.0 mm (4.9 in)

Longest dry spell (CDD)

The longest dry spell of the year at Los Conos, 1971 to 2013. The record is 180 days in 1978, marked on the chart; the median year is 93 days.

Longest dry spell (CDD) at Los Conos by year
Year	Longest dry spell (CDD)
1971	32 days
1972	59 days
1973	74 days
1974	148 days
1975	112 days
1976	47 days
1977	43 days
1978	180 days
1979	137 days
1980	53 days
1981	50 days
1982	109 days
1983	128 days
1984	93 days
1985	83 days
1986	79 days
1987	93 days
1988	81 days
1989	163 days
1990	71 days
1991	116 days
1992	39 days
1993	101 days
1994	87 days
1995	84 days
1996	86 days
1997	50 days
1998	159 days
1999	137 days
2000	140 days
2001	76 days
2002	89 days
2003	133 days
2004	65 days
2005	72 days
2006	130 days
2007	108 days
2008	107 days
2009	79 days
2010	101 days
2011	121 days
2012	98 days
2013	130 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.

Frost Dates and Growing Season

33 years with a frost

Across 33 years with a frost, the median last spring frost at Los Conos falls on 5 March and the median first autumn frost on 17 November, which leaves a median of 261 days between them.

Fitted over all years, the growing season changes by -13.2 days per decade at this station.

Frost dates and growing season at Los Conos
Measure	Median, all years	Earliest period	Recent period (1976 to 2012)	Recent against earliest	Fitted trend
Last spring frost	5 March	n/a	5 March	n/a	+6.8 days per decade
First autumn frost	17 November	n/a	18 November	n/a	-6.3 days per decade
Growing days	261 days	n/a	258 days	n/a	-13.2 days per decade

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Rainfall Return Levels

40 years, 1973 to 2012

A day with at least 47.4 mm (1.9 in) of rain is expected about once in 2 years. A day with at least 90.9 mm (3.6 in) of rain is expected about once in 100 years.

Rainfall return levels at Los Conos: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	47.4 mm (1.9 in)
5 years	60.5 mm (2.4 in)
10 years	68.5 mm (2.7 in)
25 years	78.0 mm (3.1 in)
50 years	84.7 mm (3.3 in)	Longer than the 40 years of record
100 years	90.9 mm (3.6 in)	Longer than the 40 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, 40 years of values from 1973 to 2012.

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: 85.3 mm (3.4 in) in 2011; 77.0 mm (3.0 in) in 1978; 77.0 mm (3.0 in) in 1992.

Download the Data

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