El Rosario Weather Records (MXN00016159)

Record envelope, standing records and threshold days for El Rosario (MXN00016159), Mexico, with 41 years of record.

Key Facts for El Rosario

El Rosario (MXN00016159) is a weather station in Mexico at 20.12 latitude and -101.73 longitude, 1,700 m (5,577 ft) above sea level.
The station reports from 1972 to 2012, 41 years of record.
1,464 records set at El Rosario still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
El Rosario set a daily record low maximum temperature of 21.1 C (70.0 F) on 30 August 2012.

About the Station

Location: Mexico, 20.12 latitude, -101.73 longitude.
Elevation: 1,700 m (5,577 ft).
Period of record: 1972 to 2012, 41 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 El Rosario. 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 El Rosario, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	29.4 C (84.9 F)	-0.6 C (30.9 F)	n/a	n/a
Feb	35.0 C (95.0 F)	0.0 C (32.0 F)	n/a	n/a
Mar	35.6 C (96.1 F)	1.7 C (35.1 F)	n/a	n/a
Apr	38.3 C (100.9 F)	5.0 C (41.0 F)	n/a	n/a
May	37.8 C (100.0 F)	4.4 C (39.9 F)	n/a	n/a
Jun	38.9 C (102.0 F)	6.7 C (44.1 F)	n/a	n/a
Jul	31.7 C (89.1 F)	6.7 C (44.1 F)	n/a	n/a
Aug	30.6 C (87.1 F)	6.7 C (44.1 F)	n/a	n/a
Sep	31.1 C (88.0 F)	3.9 C (39.0 F)	n/a	n/a
Oct	32.8 C (91.0 F)	1.1 C (34.0 F)	n/a	n/a
Nov	31.1 C (88.0 F)	-4.4 C (24.1 F)	n/a	n/a
Dec	29.4 C (84.9 F)	-1.1 C (30.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at El Rosario still stand. 1973 holds the most, with 72.

Standing records at El Rosario by the year they were set
Year set	Standing records
1972	54
1973	72
1974	34
1975	32
1976	26
1977	34
1978	32
1979	49
1980	49
1981	36
1982	28
1983	43
1984	21
1985	17
1986	32
1987	45
1988	38
1989	25
1990	53
1991	22
1992	48
1993	40
1994	32
1995	58
1996	40
1997	51
1998	37
1999	19
2000	34
2001	23
2002	56
2003	2
2005	24
2006	34
2007	29
2008	30
2009	17
2010	54
2011	56
2012	38

All-Time Record Progression

2 new records

2 all-time records were set at El Rosario between 27 December 2006 and 29 November 2011. Each dot is a new record.

When El Rosario set new all-time records
Date	Kind	Detail
2006-12-27	Record low minimum temperature	Record low minimum temperature -1.1 C (30.0 F)
2011-11-29	Record low minimum temperature	Record low minimum temperature -4.4 C (24.1 F)

Wettest Day of Each Month

Jul: 88.1 mm (3.5 in)

The wettest day on record for each calendar month at El Rosario. The most was 88.1 mm (3.5 in) on 1 July 1997.

Record daily precipitation for each month at El Rosario
Month	Record daily precipitation (mm)	Date
Jan	37.3 mm (1.5 in)	24 January 1980
Feb	50.8 mm (2.0 in)	4 February 2010
Mar	18.3 mm (0.7 in)	24 March 1976
Apr	13.0 mm (0.5 in)	13 April 2008
May	49.8 mm (2.0 in)	14 May 2002
Jun	61.0 mm (2.4 in)	22 June 1993
Jul	88.1 mm (3.5 in)	1 July 1997
Aug	70.9 mm (2.8 in)	17 August 1980
Sep	83.6 mm (3.3 in)	11 September 1977
Oct	62.2 mm (2.4 in)	8 October 1982
Nov	47.0 mm (1.9 in)	1 November 1980
Dec	28.4 mm (1.1 in)	12 December 1982

Period of Record Coverage

1972 to 2012

40 years of record at El Rosario, 1972 to 2012. 3 years have data for under 90 percent of days and are left out of rankings: 1972, 2003, 2012.

Days with data per year at El Rosario
Year	Days with data	Share of year	Complete
1972	173	47%	No
1973	365	100%	Yes
1974	365	100%	Yes
1975	365	100%	Yes
1976	366	100%	Yes
1977	364	100%	Yes
1978	365	100%	Yes
1979	364	100%	Yes
1980	361	99%	Yes
1981	358	98%	Yes
1982	361	99%	Yes
1983	362	99%	Yes
1984	365	100%	Yes
1985	365	100%	Yes
1986	365	100%	Yes
1987	364	100%	Yes
1988	365	100%	Yes
1989	333	91%	Yes
1990	365	100%	Yes
1991	365	100%	Yes
1992	366	100%	Yes
1993	365	100%	Yes
1994	365	100%	Yes
1995	364	100%	Yes
1996	366	100%	Yes
1997	365	100%	Yes
1998	365	100%	Yes
1999	365	100%	Yes
2000	363	99%	Yes
2001	364	100%	Yes
2002	365	100%	Yes
2003	31	8%	No
2005	361	99%	Yes
2006	364	100%	Yes
2007	332	91%	Yes
2008	366	100%	Yes
2009	365	100%	Yes
2010	365	100%	Yes
2011	364	100%	Yes
2012	243	66%	No

Latest Records

Latest records at El Rosario
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
30 August 2012	El Rosario, MX	daily low max	21.1 C (70.0 F)	0.6 C (1.1 F)	24 years	14 of 100 (Routine)
29 August 2012	El Rosario, MX	daily high max	29.4 C (84.9 F)	0.5 C (0.9 F)	29 years	15 of 100 (Routine)
29 August 2012	El Rosario, MX	daily low min	10.0 C (50.0 F)	1.1 C (2.0 F)	2 years	11 of 100 (Routine)
26 August 2012	El Rosario, MX	daily low min	10.0 C (50.0 F)	0.6 C (1.1 F)	22 years	13 of 100 (Routine)
16 August 2012	El Rosario, MX	daily low min	7.8 C (46.0 F)	2.8 C (5.0 F)	1 year	22 of 100 (Routine)
15 August 2012	El Rosario, MX	daily low min	7.2 C (45.0 F)	2.8 C (5.0 F)	1 year	22 of 100 (Routine)
14 August 2012	El Rosario, MX	daily low max	20.0 C (68.0 F)	1.1 C (2.0 F)	2 years	10 of 100 (Routine)
12 August 2012	El Rosario, MX	daily low max	23.3 C (73.9 F)	0.6 C (1.1 F)	39 years	18 of 100 (Routine)
11 August 2012	El Rosario, MX	daily low max (Tie)	22.2 C (72.0 F)	tie	35 years	3 of 100 (Routine)
9 August 2012	El Rosario, MX	daily low max	21.7 C (71.1 F)	0.5 C (0.9 F)	12 years	10 of 100 (Routine)
2 August 2012	El Rosario, MX	daily low max	20.6 C (69.1 F)	1.1 C (2.0 F)	38 years	21 of 100 (Routine)
31 July 2012	El Rosario, MX	daily low min	10.6 C (51.1 F)	1.1 C (2.0 F)	28 years	19 of 100 (Routine)
30 July 2012	El Rosario, MX	daily low max (Tie)	21.7 C (71.1 F)	tie	25 years	2 of 100 (Routine)
30 July 2012	El Rosario, MX	daily low min (Tie)	10.0 C (50.0 F)	tie	1 year	1 of 100 (Routine)
29 July 2012	El Rosario, MX	daily low min	10.6 C (51.1 F)	0.5 C (0.9 F)	22 years	13 of 100 (Routine)
27 July 2012	El Rosario, MX	daily rain	36.1 mm (1.4 in)	1.0 mm (0.04 in)	25 years	11 of 100 (Routine)
24 July 2012	El Rosario, MX	daily low min (Tie)	10.0 C (50.0 F)	tie	22 years	2 of 100 (Routine)
23 July 2012	El Rosario, MX	daily low min	10.0 C (50.0 F)	0.6 C (1.1 F)	20 years	13 of 100 (Routine)
22 July 2012	El Rosario, MX	daily low min (Tie)	10.0 C (50.0 F)	tie	4 years	1 of 100 (Routine)
20 July 2012	El Rosario, MX	daily low max	20.0 C (68.0 F)	0.6 C (1.1 F)	36 years	16 of 100 (Routine)

Climate Trend

35 complete years, 1973 to 2011

One stripe for each of 35 complete years at El Rosario, 1973 to 2011. Blue stripes are years cooler than the station's own mean of 19.0 C (66.1 F); red stripes are warmer. The coolest year was 2011, at 17.8 C (64.0 F), and the warmest was 1995, at 20.0 C (67.9 F). The strongest colour marks a difference of 1.2 C (2.2 F).

Annual mean temperature at El Rosario as warming stripes, 1973 to 2011
Year	Annual mean temperature	Difference from the station mean
1973	19.5 C	+0.59 C
1974	19.0 C	+0.03 C
1975	19.1 C	+0.18 C
1976	19.0 C	+0.05 C
1977	18.6 C	-0.38 C
1978	18.8 C	-0.12 C
1979	18.9 C	-0.06 C
1980	19.3 C	+0.38 C
1981	19.1 C	+0.10 C
1982	19.6 C	+0.62 C
1983	18.9 C	-0.04 C
1984	18.9 C	-0.06 C
1985	18.9 C	-0.07 C
1986	19.1 C	+0.16 C
1987	19.1 C	+0.10 C
1988	19.4 C	+0.40 C
1990	19.0 C	0.00 C
1991	19.1 C	+0.12 C
1992	18.4 C	-0.57 C
1993	19.3 C	+0.33 C
1994	19.7 C	+0.76 C
1995	20.0 C	+1.01 C
1996	19.5 C	+0.50 C
1997	18.9 C	-0.05 C
1998	19.7 C	+0.79 C
1999	18.8 C	-0.15 C
2000	19.1 C	+0.15 C
2001	18.7 C	-0.21 C
2002	18.5 C	-0.42 C
2005	18.7 C	-0.28 C
2006	18.3 C	-0.64 C
2008	18.2 C	-0.76 C
2009	18.7 C	-0.21 C
2010	18.0 C	-0.99 C
2011	17.8 C	-1.15 C

The annual mean temperature here has fallen by 0.2 C (0.1 to 0.3) per decade over 1973 to 2011. In Fahrenheit: 0.3 F (0.1 to 0.6) per decade. The slope is a straight line fitted to 35 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at El Rosario
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	-0.2 C (-0.3 to -0.1) per decade	-0.3 F (-0.6 to -0.1) per decade	1973 to 2011	35	Fall
Mean daily maximum	-0.14 C (-0.30 to 0.01) per decade	-0.26 F (-0.54 to 0.02) per decade	1973 to 2011	35	Not clearly different from zero
Mean daily minimum	-0.23 C (-0.45 to -0.02) per decade	-0.42 F (-0.80 to -0.04) per decade	1973 to 2011	35	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

1972 to 2012

Yearly extremes at El Rosario: 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)	1997	35.0 C (95.0 F)	40
Coldest night (TNn)	-4.4 C (24.1 F)	2011	0.6 C (33.1 F)	40
Wettest day (Rx1day)	88.1 mm (3.5 in)	1997	44.2 mm (1.7 in)	40
Wettest five days (Rx5day)	186.5 mm (7.3 in)	1993	94.9 mm (3.7 in)	40
Longest dry spell (CDD)	157 days	1998	74 days	40

Hottest day (TXx)

The hottest day of the year at El Rosario, 1972 to 2012. The record is 38.9 C (102.0 F) in 1997, marked on the chart; the median year is 35.0 C (95.0 F).

Hottest day (TXx) at El Rosario by year
Year	Hottest day (TXx)
1972	32.8 C (91.0 F)
1973	35.6 C (96.1 F)
1974	35.0 C (95.0 F)
1975	35.0 C (95.0 F)
1976	35.0 C (95.0 F)
1977	33.9 C (93.0 F)
1978	35.0 C (95.0 F)
1979	35.6 C (96.1 F)
1980	35.0 C (95.0 F)
1981	35.0 C (95.0 F)
1982	36.7 C (98.1 F)
1983	37.8 C (100.0 F)
1984	35.0 C (95.0 F)
1985	35.0 C (95.0 F)
1986	35.6 C (96.1 F)
1987	35.0 C (95.0 F)
1988	35.6 C (96.1 F)
1989	35.0 C (95.0 F)
1990	35.0 C (95.0 F)
1991	35.0 C (95.0 F)
1992	35.0 C (95.0 F)
1993	34.4 C (93.9 F)
1994	35.6 C (96.1 F)
1995	35.0 C (95.0 F)
1996	35.0 C (95.0 F)
1997	38.9 C (102.0 F)
1998	37.2 C (99.0 F)
1999	38.3 C (100.9 F)
2000	35.0 C (95.0 F)
2001	35.0 C (95.0 F)
2002	33.9 C (93.0 F)
2003	25.0 C (77.0 F)
2005	36.1 C (97.0 F)
2006	35.0 C (95.0 F)
2007	32.8 C (91.0 F)
2008	35.0 C (95.0 F)
2009	35.6 C (96.1 F)
2010	35.6 C (96.1 F)
2011	36.1 C (97.0 F)
2012	34.4 C (93.9 F)

Coldest night (TNn)

The coldest night of the year at El Rosario, 1972 to 2012. The record is -4.4 C (24.1 F) in 2011, marked on the chart; the median year is 0.6 C (33.1 F).

Coldest night (TNn) at El Rosario by year
Year	Coldest night (TNn)
1972	0.0 C (32.0 F)
1973	0.6 C (33.1 F)
1974	1.1 C (34.0 F)
1975	0.6 C (33.1 F)
1976	0.0 C (32.0 F)
1977	3.9 C (39.0 F)
1978	2.2 C (36.0 F)
1979	1.1 C (34.0 F)
1980	1.7 C (35.1 F)
1981	1.1 C (34.0 F)
1982	2.2 C (36.0 F)
1983	0.0 C (32.0 F)
1984	1.1 C (34.0 F)
1985	0.6 C (33.1 F)
1986	0.0 C (32.0 F)
1987	0.6 C (33.1 F)
1988	0.0 C (32.0 F)
1989	0.6 C (33.1 F)
1990	2.8 C (37.0 F)
1991	2.8 C (37.0 F)
1992	2.8 C (37.0 F)
1993	0.6 C (33.1 F)
1994	0.6 C (33.1 F)
1995	4.4 C (39.9 F)
1996	0.6 C (33.1 F)
1997	0.6 C (33.1 F)
1998	0.0 C (32.0 F)
1999	1.1 C (34.0 F)
2000	2.8 C (37.0 F)
2001	2.2 C (36.0 F)
2002	0.0 C (32.0 F)
2003	2.8 C (37.0 F)
2005	1.7 C (35.1 F)
2006	-1.1 C (30.0 F)
2007	2.8 C (37.0 F)
2008	-0.6 C (30.9 F)
2009	2.2 C (36.0 F)
2010	-1.1 C (30.0 F)
2011	-4.4 C (24.1 F)
2012	0.6 C (33.1 F)

Wettest day (Rx1day)

The wettest day of the year at El Rosario, 1972 to 2012. The record is 88.1 mm (3.5 in) in 1997, marked on the chart; the median year is 44.2 mm (1.7 in).

Wettest day (Rx1day) at El Rosario by year
Year	Wettest day (Rx1day)
1972	51.6 mm (2.0 in)
1973	52.3 mm (2.1 in)
1974	48.3 mm (1.9 in)
1975	34.3 mm (1.4 in)
1976	41.7 mm (1.6 in)
1977	83.6 mm (3.3 in)
1978	46.5 mm (1.8 in)
1979	37.3 mm (1.5 in)
1980	70.9 mm (2.8 in)
1981	31.5 mm (1.2 in)
1982	62.2 mm (2.4 in)
1983	36.6 mm (1.4 in)
1984	41.7 mm (1.6 in)
1985	53.3 mm (2.1 in)
1986	41.9 mm (1.6 in)
1987	45.0 mm (1.8 in)
1988	51.3 mm (2.0 in)
1989	31.8 mm (1.3 in)
1990	31.0 mm (1.2 in)
1991	43.4 mm (1.7 in)
1992	65.5 mm (2.6 in)
1993	61.0 mm (2.4 in)
1994	35.8 mm (1.4 in)
1995	55.1 mm (2.2 in)
1996	39.9 mm (1.6 in)
1997	88.1 mm (3.5 in)
1998	42.2 mm (1.7 in)
1999	57.4 mm (2.3 in)
2000	32.3 mm (1.3 in)
2001	37.8 mm (1.5 in)
2002	49.8 mm (2.0 in)
2003	10.2 mm (0.4 in)
2005	62.2 mm (2.4 in)
2006	40.4 mm (1.6 in)
2007	46.5 mm (1.8 in)
2008	45.5 mm (1.8 in)
2009	35.3 mm (1.4 in)
2010	50.8 mm (2.0 in)
2011	21.8 mm (0.9 in)
2012	38.9 mm (1.5 in)

Wettest five days (Rx5day)

The wettest five days of the year at El Rosario, 1972 to 2012. The record is 186.5 mm (7.3 in) in 1993, marked on the chart; the median year is 94.9 mm (3.7 in).

Wettest five days (Rx5day) at El Rosario by year
Year	Wettest five days (Rx5day)
1972	104.4 mm (4.1 in)
1973	108.4 mm (4.3 in)
1974	103.1 mm (4.1 in)
1975	74.5 mm (2.9 in)
1976	104.6 mm (4.1 in)
1977	151.7 mm (6.0 in)
1978	118.9 mm (4.7 in)
1979	95.2 mm (3.7 in)
1980	106.7 mm (4.2 in)
1981	96.5 mm (3.8 in)
1982	116.9 mm (4.6 in)
1983	89.0 mm (3.5 in)
1984	60.8 mm (2.4 in)
1985	80.1 mm (3.2 in)
1986	123.9 mm (4.9 in)
1987	124.6 mm (4.9 in)
1988	147.7 mm (5.8 in)
1989	55.1 mm (2.2 in)
1990	91.2 mm (3.6 in)
1991	101.6 mm (4.0 in)
1992	175.5 mm (6.9 in)
1993	186.5 mm (7.3 in)
1994	79.3 mm (3.1 in)
1995	114.8 mm (4.5 in)
1996	71.7 mm (2.8 in)
1997	153.5 mm (6.0 in)
1998	125.8 mm (5.0 in)
1999	94.5 mm (3.7 in)
2000	59.9 mm (2.4 in)
2001	74.1 mm (2.9 in)
2002	71.3 mm (2.8 in)
2003	13.9 mm (0.5 in)
2005	86.7 mm (3.4 in)
2006	62.0 mm (2.4 in)
2007	70.2 mm (2.8 in)
2008	87.1 mm (3.4 in)
2009	83.0 mm (3.3 in)
2010	104.9 mm (4.1 in)
2011	49.5 mm (1.9 in)
2012	67.0 mm (2.6 in)

Longest dry spell (CDD)

The longest dry spell of the year at El Rosario, 1972 to 2012. The record is 157 days in 1998, marked on the chart; the median year is 74 days.

Longest dry spell (CDD) at El Rosario by year
Year	Longest dry spell (CDD)
1972	36 days
1973	48 days
1974	34 days
1975	51 days
1976	82 days
1977	52 days
1978	35 days
1979	60 days
1980	51 days
1981	42 days
1982	59 days
1983	71 days
1984	88 days
1985	50 days
1986	81 days
1987	137 days
1988	93 days
1989	49 days
1990	55 days
1991	125 days
1992	92 days
1993	109 days
1994	84 days
1995	46 days
1996	113 days
1997	76 days
1998	157 days
1999	84 days
2000	143 days
2001	107 days
2002	52 days
2003	14 days
2005	92 days
2006	51 days
2007	29 days
2008	103 days
2009	118 days
2010	97 days
2011	127 days
2012	50 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

37 years, 1973 to 2011

A day with at least 44.6 mm (1.8 in) of rain is expected about once in 2 years. A day with at least 95.9 mm (3.8 in) of rain is expected about once in 100 years.

Rainfall return levels at El Rosario: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	44.6 mm (1.8 in)
5 years	57.4 mm (2.3 in)
10 years	66.3 mm (2.6 in)
25 years	77.9 mm (3.1 in)
50 years	86.8 mm (3.4 in)	Longer than the 37 years of record
100 years	95.9 mm (3.8 in)	Longer than the 37 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, 37 years of values from 1973 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: 88.1 mm (3.5 in) in 1997; 83.6 mm (3.3 in) in 1977; 70.9 mm (2.8 in) in 1980.

Download the Data

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