San Salvador El Seco Weather Records (MXN00021080)

Record envelope, standing records and threshold days for San Salvador El Seco (MXN00021080), Mexico, with 44 years of record.

Key Facts for San Salvador El Seco

San Salvador El Seco (MXN00021080) is a weather station in Mexico at 19.13 latitude and -97.65 longitude, 2,355 m (7,726 ft) above sea level.
The station reports from 1966 to 2009, 44 years of record.
1,464 records set at San Salvador El Seco still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
San Salvador El Seco set a daily record low maximum temperature of 15.6 C (60.1 F) on 24 December 2009.

About the Station

Location: Mexico, 19.13 latitude, -97.65 longitude.
Elevation: 2,355 m (7,726 ft).
Period of record: 1966 to 2009, 44 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 San Salvador El Seco. 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 Salvador El Seco, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	32.2 C (90.0 F)	-12.2 C (10.0 F)	n/a	n/a
Feb	35.0 C (95.0 F)	-11.7 C (10.9 F)	n/a	n/a
Mar	35.6 C (96.1 F)	-9.4 C (15.1 F)	n/a	n/a
Apr	35.6 C (96.1 F)	-6.1 C (21.0 F)	n/a	n/a
May	38.9 C (102.0 F)	-6.1 C (21.0 F)	n/a	n/a
Jun	35.0 C (95.0 F)	-3.3 C (26.1 F)	n/a	n/a
Jul	32.8 C (91.0 F)	-1.1 C (30.0 F)	n/a	n/a
Aug	35.0 C (95.0 F)	-1.1 C (30.0 F)	n/a	n/a
Sep	33.3 C (91.9 F)	-5.0 C (23.0 F)	n/a	n/a
Oct	33.3 C (91.9 F)	-7.2 C (19.0 F)	n/a	n/a
Nov	32.8 C (91.0 F)	-11.1 C (12.0 F)	n/a	n/a
Dec	33.9 C (93.0 F)	-8.3 C (17.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at San Salvador El Seco still stand. 1967 holds the most, with 107.

Standing records at San Salvador El Seco by the year they were set
Year set	Standing records
1966	98
1967	107
1968	53
1969	86
1970	87
1971	61
1972	56
1973	49
1974	30
1975	33
1976	48
1977	12
1978	23
1979	26
1980	17
1981	7
1982	22
1983	15
1984	14
1985	22
1986	23
1987	24
1988	17
1989	15
1990	30
1991	33
1992	46
1993	1
1994	31
1995	50
1996	8
1997	20
1998	18
1999	30
2000	37
2001	40
2002	20
2003	7
2004	12
2005	10
2006	18
2007	33
2008	46
2009	29

All-Time Record Progression

4 new records

4 all-time records were set at San Salvador El Seco between 12 July 1999 and 1 October 2008. Each dot is a new record.

When San Salvador El Seco set new all-time records
Date	Kind	Detail
1999-07-12	Record daily precipitation	Record daily precipitation 180.6 mm (7.1 in)
1999-07-19	Record daily precipitation	Record daily precipitation 185.9 mm (7.3 in)
2005-01-16	Record low minimum temperature	Record low minimum temperature -12.2 C (10.0 F)
2008-10-01	Record high minimum temperature	Record high minimum temperature 16.7 C (62.1 F)

Wettest Day of Each Month

Jul: 185.9 mm (7.3 in)

The wettest day on record for each calendar month at San Salvador El Seco. The most was 185.9 mm (7.3 in) on 19 July 1999.

Record daily precipitation for each month at San Salvador El Seco
Month	Record daily precipitation (mm)	Date
Jan	30.0 mm (1.2 in)	13 January 2002
Feb	18.8 mm (0.7 in)	11 February 1983
Mar	33.8 mm (1.3 in)	18 March 1969
Apr	182.9 mm (7.2 in)	26 April 2001
May	131.8 mm (5.2 in)	23 May 2001
Jun	182.9 mm (7.2 in)	30 June 2001
Jul	185.9 mm (7.3 in)	19 July 1999
Aug	151.9 mm (6.0 in)	6 August 2001
Sep	182.9 mm (7.2 in)	17 September 2001
Oct	77.0 mm (3.0 in)	25 October 1973
Nov	39.9 mm (1.6 in)	6 November 2006
Dec	30.0 mm (1.2 in)	29 December 1995

Period of Record Coverage

1966 to 2009

44 years of record at San Salvador El Seco, 1966 to 2009. 11 years have data for under 90 percent of days and are left out of rankings: 1966, 1988, 1989, 1990, 1993, 1994, 1995, 1996 and others.

Days with data per year at San Salvador El Seco
Year	Days with data	Share of year	Complete
1966	304	83%	No
1967	364	100%	Yes
1968	365	100%	Yes
1969	335	92%	Yes
1970	363	99%	Yes
1971	365	100%	Yes
1972	365	100%	Yes
1973	364	100%	Yes
1974	365	100%	Yes
1975	365	100%	Yes
1976	359	98%	Yes
1977	365	100%	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	361	99%	Yes
1987	361	99%	Yes
1988	240	66%	No
1989	180	49%	No
1990	300	82%	No
1991	365	100%	Yes
1992	366	100%	Yes
1993	303	83%	No
1994	214	59%	No
1995	243	67%	No
1996	306	84%	No
1997	273	75%	No
1998	306	84%	No
1999	243	67%	No
2000	359	98%	Yes
2001	364	100%	Yes
2002	365	100%	Yes
2003	334	92%	Yes
2004	366	100%	Yes
2005	364	100%	Yes
2006	334	92%	Yes
2007	355	97%	Yes
2008	358	98%	Yes
2009	356	98%	Yes

Latest Records

Latest records at San Salvador El Seco
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
24 December 2009	San Salvador El Seco, MX	daily low max	15.6 C (60.1 F)	1.6 C (2.9 F)	36 years	18 of 100 (Routine)
20 December 2009	San Salvador El Seco, MX	daily low max	15.0 C (59.0 F)	1.7 C (3.1 F)	36 years	19 of 100 (Routine)
17 December 2009	San Salvador El Seco, MX	daily rain	2.3 mm (0.09 in)	1.3 mm (0.05 in)	8 years	8 of 100 (Routine)
1 December 2009	San Salvador El Seco, MX	daily rain	3.3 mm (0.13 in)	3.3 mm (0.13 in)	43 years	20 of 100 (Routine)
1 December 2009	San Salvador El Seco, MX	daily low max (Tie)	18.9 C (66.0 F)	tie	19 years	2 of 100 (Routine)
26 November 2009	San Salvador El Seco, MX	daily low max (Tie)	16.7 C (62.1 F)	tie	36 years	3 of 100 (Routine)
14 November 2009	San Salvador El Seco, MX	daily low min (Tie)	-6.1 C (21.0 F)	tie	24 years	2 of 100 (Routine)
6 November 2009	San Salvador El Seco, MX	daily low max	16.7 C (62.1 F)	0.5 C (0.9 F)	32 years	14 of 100 (Routine)
3 November 2009	San Salvador El Seco, MX	daily low max (Tie)	16.7 C (62.1 F)	tie	32 years	3 of 100 (Routine)
25 September 2009	San Salvador El Seco, MX	daily low max	13.9 C (57.0 F)	1.7 C (3.1 F)	30 years	18 of 100 (Routine)
24 September 2009	San Salvador El Seco, MX	daily low max	15.6 C (60.1 F)	2.2 C (4.0 F)	34 years	20 of 100 (Routine)
16 September 2009	San Salvador El Seco, MX	daily rain	46.0 mm (1.8 in)	32.3 mm (1.3 in)	11 years	24 of 100 (Routine)
2 September 2009	San Salvador El Seco, MX	daily low min (Tie)	0.6 C (33.1 F)	tie	7 years	1 of 100 (Routine)
25 August 2009	San Salvador El Seco, MX	daily low min (Tie)	1.7 C (35.1 F)	tie	4 years	1 of 100 (Routine)
24 August 2009	San Salvador El Seco, MX	daily low min (Tie)	2.8 C (37.0 F)	tie	28 years	3 of 100 (Routine)
23 August 2009	San Salvador El Seco, MX	daily low min (Tie)	2.8 C (37.0 F)	tie	24 years	2 of 100 (Routine)
12 August 2009	San Salvador El Seco, MX	daily low min	0.6 C (33.1 F)	1.1 C (2.0 F)	24 years	14 of 100 (Routine)
1 August 2009	San Salvador El Seco, MX	daily low min	0.6 C (33.1 F)	1.1 C (2.0 F)	12 years	10 of 100 (Routine)
31 July 2009	San Salvador El Seco, MX	daily rain	35.1 mm (1.4 in)	0.8 mm (0.03 in)	36 years	14 of 100 (Routine)
27 July 2009	San Salvador El Seco, MX	daily low max (Tie)	20.0 C (68.0 F)	tie	36 years	3 of 100 (Routine)

Climate Trend

30 complete years, 1967 to 2009

One stripe for each of 30 complete years at San Salvador El Seco, 1967 to 2009. Blue stripes are years cooler than the station's own mean of 14.3 C (57.8 F); red stripes are warmer. The coolest year was 1985, at 12.3 C (54.2 F), and the warmest was 1971, at 17.3 C (63.1 F). The strongest colour marks a difference of 3.0 C (5.4 F).

Annual mean temperature at San Salvador El Seco as warming stripes, 1967 to 2009
Year	Annual mean temperature	Difference from the station mean
1967	17.3 C	+2.92 C
1968	16.8 C	+2.48 C
1970	17.2 C	+2.84 C
1971	17.3 C	+2.94 C
1972	15.7 C	+1.37 C
1973	15.2 C	+0.83 C
1974	14.6 C	+0.27 C
1975	14.6 C	+0.21 C
1976	14.0 C	-0.38 C
1977	13.5 C	-0.83 C
1978	13.4 C	-0.96 C
1979	12.9 C	-1.47 C
1980	13.3 C	-1.04 C
1981	13.7 C	-0.67 C
1982	13.6 C	-0.76 C
1983	14.0 C	-0.30 C
1984	12.9 C	-1.44 C
1985	12.3 C	-2.02 C
1986	14.6 C	+0.30 C
1987	14.7 C	+0.34 C
1991	15.1 C	+0.76 C
1992	16.0 C	+1.64 C
2000	13.0 C	-1.38 C
2001	13.8 C	-0.53 C
2002	13.4 C	-0.96 C
2004	13.1 C	-1.23 C
2005	13.5 C	-0.86 C
2007	13.9 C	-0.48 C
2008	13.8 C	-0.56 C
2009	13.2 C	-1.17 C

The annual mean temperature here has fallen by 0.6 C (0.2 to 0.9) per decade over 1967 to 2009. In Fahrenheit: 1.0 F (0.4 to 1.7) per decade. The slope is a straight line fitted to 30 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at San Salvador El Seco
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	-0.6 C (-0.9 to -0.2) per decade	-1.0 F (-1.7 to -0.4) per decade	1967 to 2009	30	Fall
Mean daily maximum	-0.6 C (-1.2 to -0.1) per decade	-1.1 F (-2.1 to -0.1) per decade	1967 to 2009	30	Fall
Mean daily minimum	-0.5 C (-1.0 to -0.1) per decade	-1.0 F (-1.7 to -0.2) per decade	1967 to 2009	30	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

1966 to 2009

Yearly extremes at San Salvador El Seco: 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)	1990	30.0 C (86.0 F)	44
Coldest night (TNn)	-12.2 C (10.0 F)	2005	-7.2 C (19.0 F)	44
Wettest day (Rx1day)	185.9 mm (7.3 in)	1999	39.9 mm (1.6 in)	44
Wettest five days (Rx5day)	393.0 mm (15.5 in)	2001	77.8 mm (3.1 in)	44
Longest dry spell (CDD)	120 days	1991	62 days	44

Hottest day (TXx)

The hottest day of the year at San Salvador El Seco, 1966 to 2009. The record is 38.9 C (102.0 F) in 1990, marked on the chart; the median year is 30.0 C (86.0 F).

Hottest day (TXx) at San Salvador El Seco by year
Year	Hottest day (TXx)
1966	35.6 C (96.1 F)
1967	36.7 C (98.1 F)
1968	35.0 C (95.0 F)
1969	35.0 C (95.0 F)
1970	36.7 C (98.1 F)
1971	35.6 C (96.1 F)
1972	35.0 C (95.0 F)
1973	30.0 C (86.0 F)
1974	31.7 C (89.1 F)
1975	30.0 C (86.0 F)
1976	30.0 C (86.0 F)
1977	30.6 C (87.1 F)
1978	26.7 C (80.1 F)
1979	30.0 C (86.0 F)
1980	28.9 C (84.0 F)
1981	28.9 C (84.0 F)
1982	30.0 C (86.0 F)
1983	31.7 C (89.1 F)
1984	28.9 C (84.0 F)
1985	25.6 C (78.1 F)
1986	31.7 C (89.1 F)
1987	30.0 C (86.0 F)
1988	32.8 C (91.0 F)
1989	30.0 C (86.0 F)
1990	38.9 C (102.0 F)
1991	32.8 C (91.0 F)
1992	28.9 C (84.0 F)
1993	28.9 C (84.0 F)
1994	28.9 C (84.0 F)
1995	27.8 C (82.0 F)
1996	28.9 C (84.0 F)
1997	28.9 C (84.0 F)
1998	33.9 C (93.0 F)
1999	30.0 C (86.0 F)
2000	33.9 C (93.0 F)
2001	30.0 C (86.0 F)
2002	31.7 C (89.1 F)
2003	32.8 C (91.0 F)
2004	27.8 C (82.0 F)
2005	30.0 C (86.0 F)
2006	30.0 C (86.0 F)
2007	30.6 C (87.1 F)
2008	31.7 C (89.1 F)
2009	31.7 C (89.1 F)

Coldest night (TNn)

The coldest night of the year at San Salvador El Seco, 1966 to 2009. The record is -12.2 C (10.0 F) in 2005, marked on the chart; the median year is -7.2 C (19.0 F).

Coldest night (TNn) at San Salvador El Seco by year
Year	Coldest night (TNn)
1966	-11.1 C (12.0 F)
1967	-10.6 C (12.9 F)
1968	-10.6 C (12.9 F)
1969	-7.2 C (19.0 F)
1970	-11.7 C (10.9 F)
1971	-7.2 C (19.0 F)
1972	-11.1 C (12.0 F)
1973	-8.3 C (17.1 F)
1974	-9.4 C (15.1 F)
1975	-4.4 C (24.1 F)
1976	-6.1 C (21.0 F)
1977	-4.4 C (24.1 F)
1978	-8.3 C (17.1 F)
1979	-9.4 C (15.1 F)
1980	-5.0 C (23.0 F)
1981	-3.3 C (26.1 F)
1982	-8.3 C (17.1 F)
1983	-7.2 C (19.0 F)
1984	-10.0 C (14.0 F)
1985	-8.3 C (17.1 F)
1986	-9.4 C (15.1 F)
1987	-6.1 C (21.0 F)
1988	-6.1 C (21.0 F)
1989	-8.3 C (17.1 F)
1990	-4.4 C (24.1 F)
1991	0.0 C (32.0 F)
1992	-7.2 C (19.0 F)
1993	0.6 C (33.1 F)
1994	0.6 C (33.1 F)
1995	1.7 C (35.1 F)
1996	0.6 C (33.1 F)
1997	0.0 C (32.0 F)
1998	-10.0 C (14.0 F)
1999	-6.1 C (21.0 F)
2000	-9.4 C (15.1 F)
2001	-7.2 C (19.0 F)
2002	-4.4 C (24.1 F)
2003	-4.4 C (24.1 F)
2004	-2.2 C (28.0 F)
2005	-12.2 C (10.0 F)
2006	-7.2 C (19.0 F)
2007	-3.3 C (26.1 F)
2008	0.0 C (32.0 F)
2009	-6.1 C (21.0 F)

Wettest day (Rx1day)

The wettest day of the year at San Salvador El Seco, 1966 to 2009. The record is 185.9 mm (7.3 in) in 1999, marked on the chart; the median year is 39.9 mm (1.6 in).

Wettest day (Rx1day) at San Salvador El Seco by year
Year	Wettest day (Rx1day)
1966	52.8 mm (2.1 in)
1967	30.0 mm (1.2 in)
1968	52.3 mm (2.1 in)
1969	79.0 mm (3.1 in)
1970	47.8 mm (1.9 in)
1971	48.3 mm (1.9 in)
1972	72.9 mm (2.9 in)
1973	77.0 mm (3.0 in)
1974	31.5 mm (1.2 in)
1975	35.3 mm (1.4 in)
1976	45.7 mm (1.8 in)
1977	30.0 mm (1.2 in)
1978	40.4 mm (1.6 in)
1979	61.0 mm (2.4 in)
1980	39.9 mm (1.6 in)
1981	35.1 mm (1.4 in)
1982	30.5 mm (1.2 in)
1983	39.6 mm (1.6 in)
1984	59.9 mm (2.4 in)
1985	25.4 mm (1.0 in)
1986	31.0 mm (1.2 in)
1987	39.9 mm (1.6 in)
1988	33.3 mm (1.3 in)
1989	30.2 mm (1.2 in)
1990	30.5 mm (1.2 in)
1991	35.1 mm (1.4 in)
1992	40.4 mm (1.6 in)
1993	30.0 mm (1.2 in)
1994	30.0 mm (1.2 in)
1995	30.5 mm (1.2 in)
1996	39.1 mm (1.5 in)
1997	30.0 mm (1.2 in)
1998	31.0 mm (1.2 in)
1999	185.9 mm (7.3 in)
2000	179.1 mm (7.1 in)
2001	182.9 mm (7.2 in)
2002	38.6 mm (1.5 in)
2003	40.1 mm (1.6 in)
2004	40.9 mm (1.6 in)
2005	40.1 mm (1.6 in)
2006	48.0 mm (1.9 in)
2007	66.8 mm (2.6 in)
2008	19.8 mm (0.8 in)
2009	46.0 mm (1.8 in)

Wettest five days (Rx5day)

The wettest five days of the year at San Salvador El Seco, 1966 to 2009. The record is 393.0 mm (15.5 in) in 2001, marked on the chart; the median year is 77.8 mm (3.1 in).

Wettest five days (Rx5day) at San Salvador El Seco by year
Year	Wettest five days (Rx5day)
1966	118.7 mm (4.7 in)
1967	75.4 mm (3.0 in)
1968	89.4 mm (3.5 in)
1969	82.8 mm (3.3 in)
1970	73.7 mm (2.9 in)
1971	62.8 mm (2.5 in)
1972	78.0 mm (3.1 in)
1973	110.0 mm (4.3 in)
1974	70.6 mm (2.8 in)
1975	62.2 mm (2.4 in)
1976	96.0 mm (3.8 in)
1977	82.8 mm (3.3 in)
1978	77.5 mm (3.1 in)
1979	80.7 mm (3.2 in)
1980	57.4 mm (2.3 in)
1981	106.7 mm (4.2 in)
1982	67.3 mm (2.6 in)
1983	67.1 mm (2.6 in)
1984	131.1 mm (5.2 in)
1985	40.9 mm (1.6 in)
1986	48.3 mm (1.9 in)
1987	90.6 mm (3.6 in)
1988	65.1 mm (2.6 in)
1989	45.2 mm (1.8 in)
1990	67.3 mm (2.6 in)
1991	68.3 mm (2.7 in)
1992	90.0 mm (3.5 in)
1993	53.8 mm (2.1 in)
1994	40.9 mm (1.6 in)
1995	105.0 mm (4.1 in)
1996	72.2 mm (2.8 in)
1997	63.2 mm (2.5 in)
1998	96.8 mm (3.8 in)
1999	190.7 mm (7.5 in)
2000	192.6 mm (7.6 in)
2001	393.0 mm (15.5 in)
2002	73.2 mm (2.9 in)
2003	151.4 mm (6.0 in)
2004	64.2 mm (2.5 in)
2005	97.8 mm (3.9 in)
2006	148.9 mm (5.9 in)
2007	97.1 mm (3.8 in)
2008	40.2 mm (1.6 in)
2009	89.1 mm (3.5 in)

Longest dry spell (CDD)

The longest dry spell of the year at San Salvador El Seco, 1966 to 2009. The record is 120 days in 1991, marked on the chart; the median year is 62 days.

Longest dry spell (CDD) at San Salvador El Seco by year
Year	Longest dry spell (CDD)
1966	34 days
1967	68 days
1968	27 days
1969	61 days
1970	77 days
1971	82 days
1972	71 days
1973	57 days
1974	66 days
1975	65 days
1976	58 days
1977	31 days
1978	54 days
1979	41 days
1980	70 days
1981	57 days
1982	59 days
1983	39 days
1984	66 days
1985	66 days
1986	93 days
1987	63 days
1988	60 days
1989	100 days
1990	77 days
1991	120 days
1992	30 days
1993	101 days
1994	34 days
1995	89 days
1996	54 days
1997	29 days
1998	80 days
1999	59 days
2000	68 days
2001	53 days
2002	46 days
2003	70 days
2004	59 days
2005	71 days
2006	81 days
2007	37 days
2008	94 days
2009	55 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

25 years with a frost

Across 25 years with a frost, the median last spring frost at San Salvador El Seco falls on 21 March and the median first autumn frost on 14 October, which leaves a median of 195 days between them.

Fitted over all years, the growing season changes by -45.4 days per decade at this station.

Frost dates and growing season at San Salvador El Seco
Measure	Median, all years	Earliest period	Recent period (1967 to 2009)	Recent against earliest	Fitted trend
Last spring frost	21 March	n/a	21 March	n/a	+16.5 days per decade
First autumn frost	14 October	n/a	14 October	n/a	-28.9 days per decade
Growing days	195 days	n/a	195 days	n/a	-45.4 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

35 years, 1967 to 2009

A day with at least 41.4 mm (1.6 in) of rain is expected about once in 2 years. A day with at least 255.5 mm (10.1 in) of rain is expected about once in 100 years.

Rainfall return levels at San Salvador El Seco: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	41.4 mm (1.6 in)
5 years	64.2 mm (2.5 in)
10 years	87.9 mm (3.5 in)
25 years	133.7 mm (5.3 in)
50 years	184.4 mm (7.3 in)	Longer than the 35 years of record
100 years	255.5 mm (10.1 in)	Longer than the 35 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, 35 years of values from 1967 to 2009.

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: 185.9 mm (7.3 in) in 1999; 182.9 mm (7.2 in) in 2001; 179.1 mm (7.1 in) in 2000.

Download the Data

Data for San Salvador El Seco standing records by year: CSV or JSON. Field meanings are on the data page.
Data for San Salvador El Seco 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 2026-10-16 (16 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).