Santa Maria del Llano Weather Records (MXN00015238)

Record envelope, standing records and threshold days for Santa Maria del Llano (MXN00015238), Mexico, with 34 years of record.

Key Facts for Santa Maria del Llano

Santa Maria del Llano (MXN00015238) is a weather station in Mexico at 19.50 latitude and -99.72 longitude, 2,618 m (8,589 ft) above sea level.
The station reports from 1978 to 2011, 34 years of record.
1,464 records set at Santa Maria del Llano still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Santa Maria del Llano tied an all-time record high minimum temperature of 13.9 C (57.0 F) on 28 August 2011.

About the Station

Location: Mexico, 19.50 latitude, -99.72 longitude.
Elevation: 2,618 m (8,589 ft).
Period of record: 1978 to 2011, 34 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 Santa Maria del Llano. 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 Santa Maria del Llano, 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)	-12.2 C (10.0 F)	n/a	n/a
Feb	30.0 C (86.0 F)	-10.0 C (14.0 F)	n/a	n/a
Mar	31.7 C (89.1 F)	-9.4 C (15.1 F)	n/a	n/a
Apr	32.8 C (91.0 F)	-6.1 C (21.0 F)	n/a	n/a
May	35.0 C (95.0 F)	-1.1 C (30.0 F)	n/a	n/a
Jun	32.2 C (90.0 F)	1.1 C (34.0 F)	n/a	n/a
Jul	27.8 C (82.0 F)	1.7 C (35.1 F)	n/a	n/a
Aug	31.7 C (89.1 F)	3.3 C (37.9 F)	n/a	n/a
Sep	28.9 C (84.0 F)	-3.9 C (25.0 F)	n/a	n/a
Oct	32.8 C (91.0 F)	-8.3 C (17.1 F)	n/a	n/a
Nov	33.9 C (93.0 F)	-9.4 C (15.1 F)	n/a	n/a
Dec	31.7 C (89.1 F)	-10.0 C (14.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Santa Maria del Llano still stand. 2003 holds the most, with 142.

Standing records at Santa Maria del Llano by the year they were set
Year set	Standing records
1978	5
1979	70
1980	45
1981	56
1982	44
1983	60
1984	40
1985	33
1986	34
1987	53
1988	44
1989	49
1990	45
1991	54
1992	57
1993	16
1994	18
1995	41
1996	33
1997	35
1998	90
1999	55
2000	43
2001	36
2002	56
2003	142
2004	28
2005	29
2006	19
2008	53
2009	47
2010	14
2011	20

Wettest Day of Each Month

Jun: 79.8 mm (3.1 in)

The wettest day on record for each calendar month at Santa Maria del Llano. The most was 79.8 mm (3.1 in) on 21 June 2009.

Record daily precipitation for each month at Santa Maria del Llano
Month	Record daily precipitation (mm)	Date
Jan	49.8 mm (2.0 in)	28 January 1992
Feb	63.8 mm (2.5 in)	5 February 2010
Mar	35.1 mm (1.4 in)	4 March 1988
Apr	26.9 mm (1.1 in)	27 April 2006
May	39.1 mm (1.5 in)	27 May 1994
Jun	79.8 mm (3.1 in)	21 June 2009
Jul	69.1 mm (2.7 in)	11 July 1990
Aug	43.9 mm (1.7 in)	28 August 1981
Sep	45.0 mm (1.8 in)	6 September 1991
Oct	48.8 mm (1.9 in)	20 October 1979
Nov	19.8 mm (0.8 in)	10 November 1995
Dec	28.7 mm (1.1 in)	4 December 1986

Period of Record Coverage

1978 to 2011

33 years of record at Santa Maria del Llano, 1978 to 2011. 16 years have data for under 90 percent of days and are left out of rankings: 1978, 1988, 1989, 1993, 1994, 1995, 1996, 1997 and others.

Days with data per year at Santa Maria del Llano
Year	Days with data	Share of year	Complete
1978	31	8%	No
1979	365	100%	Yes
1980	366	100%	Yes
1981	365	100%	Yes
1982	365	100%	Yes
1983	365	100%	Yes
1984	355	97%	Yes
1985	360	99%	Yes
1986	362	99%	Yes
1987	352	96%	Yes
1988	327	89%	No
1989	290	79%	No
1990	363	99%	Yes
1991	365	100%	Yes
1992	336	92%	Yes
1993	309	85%	No
1994	313	86%	No
1995	275	75%	No
1996	299	82%	No
1997	301	82%	No
1998	278	76%	No
1999	313	86%	No
2000	316	86%	No
2001	276	76%	No
2002	314	86%	No
2003	347	95%	Yes
2004	323	88%	No
2005	356	98%	Yes
2006	329	90%	Yes
2008	315	86%	No
2009	349	96%	Yes
2010	347	95%	Yes
2011	230	63%	No

Latest Records

Latest records at Santa Maria del Llano
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
28 August 2011	Santa Maria del Llano, MX	all-time high min (Tie)	13.9 C (57.0 F)	tie	12 years	6 of 100 (Routine)
26 August 2011	Santa Maria del Llano, MX	daily high min (Tie)	12.8 C (55.0 F)	tie	9 years	1 of 100 (Routine)
25 August 2011	Santa Maria del Llano, MX	all-time high min (Tie)	13.9 C (57.0 F)	tie	12 years	6 of 100 (Routine)
24 August 2011	Santa Maria del Llano, MX	all-time high min (Tie)	13.9 C (57.0 F)	tie	12 years	6 of 100 (Routine)
23 August 2011	Santa Maria del Llano, MX	all-time high min (Tie)	13.9 C (57.0 F)	tie	12 years	6 of 100 (Routine)
22 August 2011	Santa Maria del Llano, MX	daily high min (Tie)	12.8 C (55.0 F)	tie	16 years	1 of 100 (Routine)
21 August 2011	Santa Maria del Llano, MX	daily high min (Tie)	12.8 C (55.0 F)	tie	2 years	0 of 100 (Routine)
20 August 2011	Santa Maria del Llano, MX	daily high min	12.8 C (55.0 F)	1.1 C (2.0 F)	17 years	12 of 100 (Routine)
19 August 2011	Santa Maria del Llano, MX	all-time high min (Tie)	13.9 C (57.0 F)	tie	12 years	6 of 100 (Routine)
18 August 2011	Santa Maria del Llano, MX	daily high min	12.8 C (55.0 F)	1.7 C (3.1 F)	29 years	18 of 100 (Routine)
17 August 2011	Santa Maria del Llano, MX	all-time high min (Tie)	13.9 C (57.0 F)	tie	12 years	6 of 100 (Routine)
14 August 2011	Santa Maria del Llano, MX	daily high min (Tie)	12.8 C (55.0 F)	tie	1 year	0 of 100 (Routine)
12 August 2011	Santa Maria del Llano, MX	all-time high min (Tie)	13.9 C (57.0 F)	tie	12 years	6 of 100 (Routine)
11 August 2011	Santa Maria del Llano, MX	daily high min (Tie)	12.8 C (55.0 F)	tie	16 years	1 of 100 (Routine)
4 August 2011	Santa Maria del Llano, MX	daily rain	30.0 mm (1.2 in)	5.6 mm (0.22 in)	28 years	17 of 100 (Routine)
4 August 2011	Santa Maria del Llano, MX	daily high min (Tie)	11.7 C (53.1 F)	tie	10 years	1 of 100 (Routine)
1 August 2011	Santa Maria del Llano, MX	daily high min	12.8 C (55.0 F)	1.1 C (2.0 F)	1 year	7 of 100 (Routine)
31 July 2011	Santa Maria del Llano, MX	daily high min	12.8 C (55.0 F)	1.1 C (2.0 F)	1 year	8 of 100 (Routine)
30 July 2011	Santa Maria del Llano, MX	all-time high min (Tie)	13.9 C (57.0 F)	tie	12 years	6 of 100 (Routine)
29 July 2011	Santa Maria del Llano, MX	daily high min (Tie)	12.8 C (55.0 F)	tie	1 year	0 of 100 (Routine)

Climate Trend

17 complete years, 1979 to 2010

One stripe for each of 17 complete years at Santa Maria del Llano, 1979 to 2010. Blue stripes are years cooler than the station's own mean of 13.3 C (55.9 F); red stripes are warmer. The coolest year was 1988, at 12.1 C (53.8 F), and the warmest was 2003, at 16.0 C (60.8 F). The strongest colour marks a difference of 2.8 C (5.0 F).

Annual mean temperature at Santa Maria del Llano as warming stripes, 1979 to 2010
Year	Annual mean temperature	Difference from the station mean
1979	13.1 C	-0.22 C
1980	13.1 C	-0.19 C
1981	13.1 C	-0.22 C
1982	13.3 C	+0.01 C
1983	13.1 C	-0.16 C
1984	13.0 C	-0.31 C
1985	12.7 C	-0.55 C
1986	12.5 C	-0.82 C
1987	12.2 C	-1.11 C
1988	12.1 C	-1.15 C
1990	12.3 C	-0.94 C
1991	12.6 C	-0.70 C
1993	13.6 C	+0.36 C
2003	16.0 C	+2.73 C
2005	14.6 C	+1.29 C
2009	14.6 C	+1.33 C
2010	13.9 C	+0.61 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

1978 to 2011

Yearly extremes at Santa Maria del Llano: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	35.0 C (95.0 F)	1998	29.4 C (84.9 F)	33
Coldest night (TNn)	-12.2 C (10.0 F)	1997	-7.8 C (18.0 F)	33
Wettest day (Rx1day)	79.8 mm (3.1 in)	2009	40.9 mm (1.6 in)	33
Wettest five days (Rx5day)	142.6 mm (5.6 in)	2006	81.4 mm (3.2 in)	33
Longest dry spell (CDD)	111 days	1998	53 days	33

Hottest day (TXx)

The hottest day of the year at Santa Maria del Llano, 1978 to 2011. The record is 35.0 C (95.0 F) in 1998, marked on the chart; the median year is 29.4 C (84.9 F).

Hottest day (TXx) at Santa Maria del Llano by year
Year	Hottest day (TXx)
1978	23.3 C (73.9 F)
1979	27.8 C (82.0 F)
1980	27.8 C (82.0 F)
1981	27.8 C (82.0 F)
1982	28.3 C (82.9 F)
1983	31.1 C (88.0 F)
1984	28.9 C (84.0 F)
1985	29.4 C (84.9 F)
1986	27.8 C (82.0 F)
1987	26.7 C (80.1 F)
1988	28.9 C (84.0 F)
1989	29.4 C (84.9 F)
1990	27.2 C (81.0 F)
1991	29.4 C (84.9 F)
1992	27.2 C (81.0 F)
1993	31.1 C (88.0 F)
1994	31.1 C (88.0 F)
1995	30.6 C (87.1 F)
1996	32.2 C (90.0 F)
1997	30.6 C (87.1 F)
1998	35.0 C (95.0 F)
1999	31.7 C (89.1 F)
2000	30.6 C (87.1 F)
2001	30.6 C (87.1 F)
2002	31.7 C (89.1 F)
2003	33.9 C (93.0 F)
2004	27.8 C (82.0 F)
2005	30.6 C (87.1 F)
2006	26.7 C (80.1 F)
2008	27.8 C (82.0 F)
2009	28.9 C (84.0 F)
2010	30.0 C (86.0 F)
2011	30.6 C (87.1 F)

Coldest night (TNn)

The coldest night of the year at Santa Maria del Llano, 1978 to 2011. The record is -12.2 C (10.0 F) in 1997, marked on the chart; the median year is -7.8 C (18.0 F).

Coldest night (TNn) at Santa Maria del Llano by year
Year	Coldest night (TNn)
1978	-2.2 C (28.0 F)
1979	-5.0 C (23.0 F)
1980	-9.4 C (15.1 F)
1981	-8.3 C (17.1 F)
1982	-9.4 C (15.1 F)
1983	-8.3 C (17.1 F)
1984	-5.6 C (21.9 F)
1985	-5.6 C (21.9 F)
1986	-6.7 C (19.9 F)
1987	-8.9 C (16.0 F)
1988	-10.0 C (14.0 F)
1989	-10.0 C (14.0 F)
1990	-10.0 C (14.0 F)
1991	-9.4 C (15.1 F)
1992	-8.3 C (17.1 F)
1993	-5.6 C (21.9 F)
1994	-6.7 C (19.9 F)
1995	-6.7 C (19.9 F)
1996	-9.4 C (15.1 F)
1997	-12.2 C (10.0 F)
1998	-9.4 C (15.1 F)
1999	-7.8 C (18.0 F)
2000	-6.1 C (21.0 F)
2001	-4.4 C (24.1 F)
2002	-7.8 C (18.0 F)
2003	-5.6 C (21.9 F)
2004	-6.7 C (19.9 F)
2005	-9.4 C (15.1 F)
2006	-8.3 C (17.1 F)
2008	-7.2 C (19.0 F)
2009	-6.1 C (21.0 F)
2010	-7.2 C (19.0 F)
2011	-3.3 C (26.1 F)

Wettest day (Rx1day)

The wettest day of the year at Santa Maria del Llano, 1978 to 2011. The record is 79.8 mm (3.1 in) in 2009, marked on the chart; the median year is 40.9 mm (1.6 in).

Wettest day (Rx1day) at Santa Maria del Llano by year
Year	Wettest day (Rx1day)
1978	33.3 mm (1.3 in)
1979	48.8 mm (1.9 in)
1980	36.8 mm (1.4 in)
1981	43.9 mm (1.7 in)
1982	42.4 mm (1.7 in)
1983	31.0 mm (1.2 in)
1984	31.5 mm (1.2 in)
1985	41.9 mm (1.6 in)
1986	33.3 mm (1.3 in)
1987	45.5 mm (1.8 in)
1988	35.1 mm (1.4 in)
1989	27.4 mm (1.1 in)
1990	69.1 mm (2.7 in)
1991	45.0 mm (1.8 in)
1992	49.8 mm (2.0 in)
1993	34.3 mm (1.4 in)
1994	45.5 mm (1.8 in)
1995	63.0 mm (2.5 in)
1996	42.4 mm (1.7 in)
1997	40.9 mm (1.6 in)
1998	48.3 mm (1.9 in)
1999	39.1 mm (1.5 in)
2000	32.0 mm (1.3 in)
2001	30.0 mm (1.2 in)
2002	39.9 mm (1.6 in)
2003	45.0 mm (1.8 in)
2004	35.3 mm (1.4 in)
2005	40.4 mm (1.6 in)
2006	39.9 mm (1.6 in)
2008	37.8 mm (1.5 in)
2009	79.8 mm (3.1 in)
2010	63.8 mm (2.5 in)
2011	40.9 mm (1.6 in)

Wettest five days (Rx5day)

The wettest five days of the year at Santa Maria del Llano, 1978 to 2011. The record is 142.6 mm (5.6 in) in 2006, marked on the chart; the median year is 81.4 mm (3.2 in).

Wettest five days (Rx5day) at Santa Maria del Llano by year
Year	Wettest five days (Rx5day)
1978	45.5 mm (1.8 in)
1979	63.1 mm (2.5 in)
1980	81.4 mm (3.2 in)
1981	79.5 mm (3.1 in)
1982	70.4 mm (2.8 in)
1983	74.7 mm (2.9 in)
1984	57.8 mm (2.3 in)
1985	73.9 mm (2.9 in)
1986	73.9 mm (2.9 in)
1987	107.7 mm (4.2 in)
1988	60.8 mm (2.4 in)
1989	64.0 mm (2.5 in)
1990	93.3 mm (3.7 in)
1991	92.3 mm (3.6 in)
1992	77.0 mm (3.0 in)
1993	79.5 mm (3.1 in)
1994	81.5 mm (3.2 in)
1995	120.9 mm (4.8 in)
1996	100.1 mm (3.9 in)
1997	63.7 mm (2.5 in)
1998	113.8 mm (4.5 in)
1999	85.3 mm (3.4 in)
2000	63.6 mm (2.5 in)
2001	78.0 mm (3.1 in)
2002	79.3 mm (3.1 in)
2003	92.5 mm (3.6 in)
2004	85.3 mm (3.4 in)
2005	139.2 mm (5.5 in)
2006	142.6 mm (5.6 in)
2008	119.3 mm (4.7 in)
2009	135.5 mm (5.3 in)
2010	139.1 mm (5.5 in)
2011	108.1 mm (4.3 in)

Longest dry spell (CDD)

The longest dry spell of the year at Santa Maria del Llano, 1978 to 2011. The record is 111 days in 1998, marked on the chart; the median year is 53 days.

Longest dry spell (CDD) at Santa Maria del Llano by year
Year	Longest dry spell (CDD)
1978	26 days
1979	36 days
1980	50 days
1981	46 days
1982	80 days
1983	68 days
1984	58 days
1985	84 days
1986	99 days
1987	50 days
1988	55 days
1989	53 days
1990	27 days
1991	44 days
1992	30 days
1993	54 days
1994	47 days
1995	41 days
1996	57 days
1997	26 days
1998	111 days
1999	40 days
2000	58 days
2001	31 days
2002	27 days
2003	63 days
2004	56 days
2005	53 days
2006	51 days
2008	61 days
2009	45 days
2010	80 days
2011	83 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

31 years, 1979 to 2010

A day with at least 40.4 mm (1.6 in) of rain is expected about once in 2 years. A day with at least 87.9 mm (3.5 in) of rain is expected about once in 100 years.

Rainfall return levels at Santa Maria del Llano: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	40.4 mm (1.6 in)
5 years	50.3 mm (2.0 in)
10 years	57.9 mm (2.3 in)
25 years	68.8 mm (2.7 in)
50 years	77.9 mm (3.1 in)	Longer than the 31 years of record
100 years	87.9 mm (3.5 in)	Longer than the 31 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, 31 years of values from 1979 to 2010.

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: 79.8 mm (3.1 in) in 2009; 69.1 mm (2.7 in) in 1990; 63.8 mm (2.5 in) in 2010.

Download the Data

Data for Santa Maria del Llano standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Santa Maria del Llano 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).