San Sebastian E-27 Weather Records (MXN00015296)

Record envelope, standing records and threshold days for San Sebastian E-27 (MXN00015296), Mexico, with 31 years of record.

Key Facts for San Sebastian E-27

San Sebastian E-27 (MXN00015296) is a weather station in Mexico at 18.97 latitude and -99.48 longitude, 2,045 m (6,709 ft) above sea level.
The station reports from 1979 to 2009, 31 years of record.
1,464 records set at San Sebastian E-27 still stand.
Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

Location: Mexico, 18.97 latitude, -99.48 longitude.
Elevation: 2,045 m (6,709 ft).
Period of record: 1979 to 2009, 31 years.
Eligible elements: none yet.

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 Sebastian E-27. 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 Sebastian E-27, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	28.9 C (84.0 F)	0.0 C (32.0 F)	n/a	n/a
Feb	35.6 C (96.1 F)	0.0 C (32.0 F)	n/a	n/a
Mar	40.0 C (104.0 F)	0.0 C (32.0 F)	n/a	n/a
Apr	40.6 C (105.1 F)	0.6 C (33.1 F)	n/a	n/a
May	37.8 C (100.0 F)	2.8 C (37.0 F)	n/a	n/a
Jun	33.9 C (93.0 F)	0.0 C (32.0 F)	n/a	n/a
Jul	35.0 C (95.0 F)	1.7 C (35.1 F)	n/a	n/a
Aug	33.9 C (93.0 F)	0.0 C (32.0 F)	n/a	n/a
Sep	30.0 C (86.0 F)	0.0 C (32.0 F)	n/a	n/a
Oct	28.9 C (84.0 F)	0.0 C (32.0 F)	n/a	n/a
Nov	28.9 C (84.0 F)	0.0 C (32.0 F)	n/a	n/a
Dec	31.7 C (89.1 F)	0.0 C (32.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at San Sebastian E-27 still stand. 1989 holds the most, with 263.

Standing records at San Sebastian E-27 by the year they were set
Year set	Standing records
1981	96
1982	87
1983	141
1984	114
1985	107
1986	66
1987	92
1988	25
1989	263
1994	11
1995	45
1996	68
1997	28
1998	48
1999	20
2000	18
2001	29
2002	28
2003	11
2004	61
2005	16
2006	51
2007	5
2008	30
2009	4

Wettest Day of Each Month

Jul: 96.3 mm (3.8 in)

The wettest day on record for each calendar month at San Sebastian E-27. The most was 96.3 mm (3.8 in) on 3 July 1999.

Record daily precipitation for each month at San Sebastian E-27
Month	Record daily precipitation (mm)	Date
Jan	36.8 mm (1.4 in)	30 January 1995
Feb	10.9 mm (0.4 in)	23 February 2001
Mar	16.8 mm (0.7 in)	7 March 2005
Apr	51.8 mm (2.0 in)	24 April 1995
May	59.9 mm (2.4 in)	26 May 2000
Jun	80.0 mm (3.1 in)	6 June 2000
Jul	96.3 mm (3.8 in)	3 July 1999
Aug	95.0 mm (3.7 in)	24 August 2001
Sep	79.8 mm (3.1 in)	10 September 1998
Oct	57.9 mm (2.3 in)	18 October 2006
Nov	58.9 mm (2.3 in)	3 November 2002
Dec	49.8 mm (2.0 in)	25 December 1995

Period of Record Coverage

1981 to 2009

25 years of record at San Sebastian E-27, 1981 to 2009. 5 years have data for under 90 percent of days and are left out of rankings: 1981, 1988, 1994, 1996, 2004.

Days with data per year at San Sebastian E-27
Year	Days with data	Share of year	Complete
1981	268	73%	No
1982	365	100%	Yes
1983	362	99%	Yes
1984	366	100%	Yes
1985	365	100%	Yes
1986	365	100%	Yes
1987	363	99%	Yes
1988	38	10%	No
1989	363	99%	Yes
1994	143	39%	No
1995	349	96%	Yes
1996	324	89%	No
1997	359	98%	Yes
1998	356	98%	Yes
1999	355	97%	Yes
2000	359	98%	Yes
2001	346	95%	Yes
2002	351	96%	Yes
2003	351	96%	Yes
2004	321	88%	No
2005	349	96%	Yes
2006	345	95%	Yes
2007	350	96%	Yes
2008	363	99%	Yes
2009	347	95%	Yes

Latest Records

No records were set at this station in the latest data.

Climate Trend

20 complete years, 1982 to 2009

One stripe for each of 20 complete years at San Sebastian E-27, 1982 to 2009. Blue stripes are years cooler than the station's own mean of 15.7 C (60.3 F); red stripes are warmer. The coolest year was 1989, at 11.5 C (52.7 F), and the warmest was 1984, at 18.6 C (65.5 F). The strongest colour marks a difference of 4.2 C (7.6 F).

Annual mean temperature at San Sebastian E-27 as warming stripes, 1982 to 2009
Year	Annual mean temperature	Difference from the station mean
1982	18.4 C	+2.74 C
1983	18.2 C	+2.47 C
1984	18.6 C	+2.90 C
1985	17.9 C	+2.21 C
1986	17.1 C	+1.44 C
1987	16.2 C	+0.46 C
1989	11.5 C	-4.18 C
1995	13.5 C	-2.20 C
1997	14.8 C	-0.91 C
1998	15.4 C	-0.31 C
1999	14.8 C	-0.92 C
2000	15.3 C	-0.43 C
2001	14.6 C	-1.13 C
2002	15.3 C	-0.42 C
2003	15.0 C	-0.72 C
2005	15.8 C	+0.06 C
2006	15.4 C	-0.29 C
2007	15.2 C	-0.51 C
2008	15.5 C	-0.18 C
2009	15.7 C	-0.02 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

1979 to 2009

Yearly extremes at San Sebastian E-27: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	40.6 C (105.1 F)	2006	32.8 C (91.0 F)	25
Coldest night (TNn)	0.0 C (32.0 F)	1995	0.6 C (33.1 F)	25
Wettest day (Rx1day)	96.3 mm (3.8 in)	1999	59.9 mm (2.4 in)	27
Wettest five days (Rx5day)	302.5 mm (11.9 in)	2001	149.9 mm (5.9 in)	27
Longest dry spell (CDD)	173 days	1989	63 days	27

Hottest day (TXx)

The hottest day of the year at San Sebastian E-27, 1979 to 2009. The record is 40.6 C (105.1 F) in 2006, marked on the chart; the median year is 32.8 C (91.0 F).

Hottest day (TXx) at San Sebastian E-27 by year
Year	Hottest day (TXx)
1979	n/a
1980	n/a
1981	32.8 C (91.0 F)
1982	33.9 C (93.0 F)
1983	35.0 C (95.0 F)
1984	35.0 C (95.0 F)
1985	31.7 C (89.1 F)
1986	32.8 C (91.0 F)
1987	31.7 C (89.1 F)
1988	17.8 C (64.0 F)
1989	21.7 C (71.1 F)
1994	25.0 C (77.0 F)
1995	25.6 C (78.1 F)
1996	31.7 C (89.1 F)
1997	30.6 C (87.1 F)
1998	32.8 C (91.0 F)
1999	28.9 C (84.0 F)
2000	28.9 C (84.0 F)
2001	35.0 C (95.0 F)
2002	35.0 C (95.0 F)
2003	33.9 C (93.0 F)
2004	36.7 C (98.1 F)
2005	37.8 C (100.0 F)
2006	40.6 C (105.1 F)
2007	30.0 C (86.0 F)
2008	35.6 C (96.1 F)
2009	35.6 C (96.1 F)

Coldest night (TNn)

The coldest night of the year at San Sebastian E-27, 1979 to 2009. The record is 0.0 C (32.0 F) in 1995, marked on the chart; the median year is 0.6 C (33.1 F).

Coldest night (TNn) at San Sebastian E-27 by year
Year	Coldest night (TNn)
1979	n/a
1980	n/a
1981	6.1 C (43.0 F)
1982	5.6 C (42.1 F)
1983	3.9 C (39.0 F)
1984	5.0 C (41.0 F)
1985	2.8 C (37.0 F)
1986	0.6 C (33.1 F)
1987	3.9 C (39.0 F)
1988	6.7 C (44.1 F)
1989	5.6 C (42.1 F)
1994	2.8 C (37.0 F)
1995	0.0 C (32.0 F)
1996	0.0 C (32.0 F)
1997	0.0 C (32.0 F)
1998	0.0 C (32.0 F)
1999	0.6 C (33.1 F)
2000	0.0 C (32.0 F)
2001	0.0 C (32.0 F)
2002	0.0 C (32.0 F)
2003	0.0 C (32.0 F)
2004	0.0 C (32.0 F)
2005	0.0 C (32.0 F)
2006	0.0 C (32.0 F)
2007	0.0 C (32.0 F)
2008	5.6 C (42.1 F)
2009	0.6 C (33.1 F)

Wettest day (Rx1day)

The wettest day of the year at San Sebastian E-27, 1979 to 2009. The record is 96.3 mm (3.8 in) in 1999, marked on the chart; the median year is 59.9 mm (2.4 in).

Wettest day (Rx1day) at San Sebastian E-27 by year
Year	Wettest day (Rx1day)
1979	24.9 mm (1.0 in)
1980	60.2 mm (2.4 in)
1981	67.3 mm (2.6 in)
1982	48.3 mm (1.9 in)
1983	77.0 mm (3.0 in)
1984	49.5 mm (1.9 in)
1985	47.8 mm (1.9 in)
1986	51.8 mm (2.0 in)
1987	41.4 mm (1.6 in)
1988	0.0 mm (0.00 in)
1989	32.8 mm (1.3 in)
1994	42.4 mm (1.7 in)
1995	74.9 mm (2.9 in)
1996	90.2 mm (3.6 in)
1997	95.0 mm (3.7 in)
1998	79.8 mm (3.1 in)
1999	96.3 mm (3.8 in)
2000	80.0 mm (3.1 in)
2001	95.0 mm (3.7 in)
2002	59.9 mm (2.4 in)
2003	54.9 mm (2.2 in)
2004	66.8 mm (2.6 in)
2005	59.9 mm (2.4 in)
2006	59.9 mm (2.4 in)
2007	59.9 mm (2.4 in)
2008	64.8 mm (2.6 in)
2009	79.8 mm (3.1 in)

Wettest five days (Rx5day)

The wettest five days of the year at San Sebastian E-27, 1979 to 2009. The record is 302.5 mm (11.9 in) in 2001, marked on the chart; the median year is 149.9 mm (5.9 in).

Wettest five days (Rx5day) at San Sebastian E-27 by year
Year	Wettest five days (Rx5day)
1979	71.0 mm (2.8 in)
1980	169.1 mm (6.7 in)
1981	149.9 mm (5.9 in)
1982	66.4 mm (2.6 in)
1983	115.6 mm (4.6 in)
1984	135.7 mm (5.3 in)
1985	115.4 mm (4.5 in)
1986	136.4 mm (5.4 in)
1987	59.2 mm (2.3 in)
1988	0.0 mm (0.00 in)
1989	129.3 mm (5.1 in)
1994	123.4 mm (4.9 in)
1995	130.5 mm (5.1 in)
1996	156.0 mm (6.1 in)
1997	153.7 mm (6.1 in)
1998	212.9 mm (8.4 in)
1999	221.6 mm (8.7 in)
2000	150.4 mm (5.9 in)
2001	302.5 mm (11.9 in)
2002	162.6 mm (6.4 in)
2003	188.3 mm (7.4 in)
2004	109.5 mm (4.3 in)
2005	211.4 mm (8.3 in)
2006	211.2 mm (8.3 in)
2007	136.5 mm (5.4 in)
2008	223.3 mm (8.8 in)
2009	167.2 mm (6.6 in)

Longest dry spell (CDD)

The longest dry spell of the year at San Sebastian E-27, 1979 to 2009. The record is 173 days in 1989, marked on the chart; the median year is 63 days.

Longest dry spell (CDD) at San Sebastian E-27 by year
Year	Longest dry spell (CDD)
1979	49 days
1980	64 days
1981	85 days
1982	52 days
1983	73 days
1984	56 days
1985	91 days
1986	116 days
1987	39 days
1988	35 days
1989	173 days
1994	63 days
1995	45 days
1996	53 days
1997	48 days
1998	155 days
1999	77 days
2000	127 days
2001	52 days
2002	105 days
2003	46 days
2004	67 days
2005	39 days
2006	75 days
2007	45 days
2008	112 days
2009	58 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 San Sebastian E-27 standing records by year: CSV or JSON. Field meanings are on the data page.
Data for San Sebastian E-27 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).