El Islote Weather Records (MXN00015184)

Record envelope, standing records and threshold days for El Islote (MXN00015184), Mexico, with 40 years of record.

Key Facts for El Islote

El Islote (MXN00015184) is a weather station in Mexico at 18.97 latitude and -99.65 longitude, 2,200 m (7,217 ft) above sea level.
The station reports from 1972 to 2011, 40 years of record.
1,464 records set at El Islote still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
El Islote set a daily record precipitation of 59.9 mm (2.4 in) on 27 July 2011.

About the Station

Location: Mexico, 18.97 latitude, -99.65 longitude.
Elevation: 2,200 m (7,217 ft).
Period of record: 1972 to 2011, 40 years.
Eligible elements: 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 Islote. 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 Islote, 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)	-1.1 C (30.0 F)	n/a	n/a
Feb	31.7 C (89.1 F)	-0.6 C (30.9 F)	n/a	n/a
Mar	31.7 C (89.1 F)	-1.1 C (30.0 F)	n/a	n/a
Apr	35.0 C (95.0 F)	0.6 C (33.1 F)	n/a	n/a
May	40.0 C (104.0 F)	0.6 C (33.1 F)	n/a	n/a
Jun	33.9 C (93.0 F)	0.6 C (33.1 F)	n/a	n/a
Jul	31.7 C (89.1 F)	0.6 C (33.1 F)	n/a	n/a
Aug	31.7 C (89.1 F)	0.6 C (33.1 F)	n/a	n/a
Sep	31.7 C (89.1 F)	0.6 C (33.1 F)	n/a	n/a
Oct	31.7 C (89.1 F)	0.0 C (32.0 F)	n/a	n/a
Nov	30.6 C (87.1 F)	0.6 C (33.1 F)	n/a	n/a
Dec	29.4 C (84.9 F)	0.0 C (32.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at El Islote still stand. 2001 holds the most, with 239.

Standing records at El Islote by the year they were set
Year set	Standing records
1972	122
1973	101
1974	39
1975	20
1976	37
1977	20
1978	32
1979	22
1980	15
1981	28
1982	10
1983	31
1984	59
1985	24
1986	32
1987	5
1988	42
1989	179
1990	35
1996	78
1998	88
1999	37
2000	61
2001	239
2002	13
2003	32
2004	15
2005	23
2006	10
2007	2
2008	13

Wettest Day of Each Month

Aug: 88.6 mm (3.5 in)

The wettest day on record for each calendar month at El Islote. The most was 88.6 mm (3.5 in) on 28 August 1979.

Record daily precipitation for each month at El Islote
Month	Record daily precipitation (mm)	Date
Jan	69.6 mm (2.7 in)	24 January 1980
Feb	20.8 mm (0.8 in)	22 February 1981
Mar	30.0 mm (1.2 in)	3 March 2001
Apr	56.4 mm (2.2 in)	5 April 1973
May	72.9 mm (2.9 in)	25 May 1995
Jun	85.1 mm (3.4 in)	21 June 1985
Jul	74.4 mm (2.9 in)	14 July 1985
Aug	88.6 mm (3.5 in)	28 August 1979
Sep	67.8 mm (2.7 in)	10 September 1974
Oct	86.9 mm (3.4 in)	8 October 1976
Nov	39.9 mm (1.6 in)	15 November 1972
Dec	54.4 mm (2.1 in)	29 December 1995

Period of Record Coverage

1972 to 2008

31 years of record at El Islote, 1972 to 2008. 8 years have data for under 90 percent of days and are left out of rankings: 1989, 1990, 1996, 1998, 2002, 2005, 2006, 2007.

Days with data per year at El Islote
Year	Days with data	Share of year	Complete
1972	336	92%	Yes
1973	365	100%	Yes
1974	343	94%	Yes
1975	365	100%	Yes
1976	366	100%	Yes
1977	365	100%	Yes
1978	365	100%	Yes
1979	362	99%	Yes
1980	366	100%	Yes
1981	365	100%	Yes
1982	365	100%	Yes
1983	365	100%	Yes
1984	365	100%	Yes
1985	354	97%	Yes
1986	363	99%	Yes
1987	333	91%	Yes
1988	366	100%	Yes
1989	303	83%	No
1990	243	67%	No
1996	78	21%	No
1998	172	47%	No
1999	334	92%	Yes
2000	340	93%	Yes
2001	353	97%	Yes
2002	205	56%	No
2003	354	97%	Yes
2004	353	96%	Yes
2005	292	80%	No
2006	324	89%	No
2007	176	48%	No
2008	353	96%	Yes

Latest Records

Latest records at El Islote
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
27 July 2011	El Islote, MX	daily rain	59.9 mm (2.4 in)	27.6 mm (1.1 in)	36 years	38 of 100 (Notable)
9 July 2011	El Islote, MX	daily rain	39.9 mm (1.6 in)	17.0 mm (0.7 in)	20 years	25 of 100 (Routine)
29 June 2011	El Islote, MX	daily rain (Tie)	30.0 mm (1.2 in)	tie	17 years	2 of 100 (Routine)
15 May 2011	El Islote, MX	daily rain	39.9 mm (1.6 in)	9.9 mm (0.39 in)	4 years	16 of 100 (Routine)
3 May 2011	El Islote, MX	daily rain	19.8 mm (0.8 in)	4.8 mm (0.19 in)	4 years	10 of 100 (Routine)
17 April 2011	El Islote, MX	daily rain	9.9 mm (0.39 in)	2.5 mm (0.10 in)	20 years	13 of 100 (Routine)
13 April 2011	El Islote, MX	daily rain	19.8 mm (0.8 in)	1.5 mm (0.06 in)	25 years	12 of 100 (Routine)
16 October 2008	El Islote, MX	daily rain (Tie)	19.8 mm (0.8 in)	tie	4 years	1 of 100 (Routine)
9 October 2008	El Islote, MX	daily rain	79.8 mm (3.1 in)	60.0 mm (2.4 in)	14 years	47 of 100 (Notable)
28 September 2008	El Islote, MX	daily rain	59.9 mm (2.4 in)	20.0 mm (0.8 in)	10 years	22 of 100 (Routine)
22 September 2008	El Islote, MX	daily rain	39.9 mm (1.6 in)	5.6 mm (0.22 in)	25 years	14 of 100 (Routine)
27 August 2008	El Islote, MX	daily rain	59.9 mm (2.4 in)	28.4 mm (1.1 in)	27 years	35 of 100 (Notable)
15 August 2008	El Islote, MX	daily rain	59.9 mm (2.4 in)	22.1 mm (0.9 in)	24 years	29 of 100 (Routine)
21 July 2008	El Islote, MX	daily rain	19.8 mm (0.8 in)	1.0 mm (0.04 in)	18 years	8 of 100 (Routine)
19 July 2008	El Islote, MX	daily rain	39.9 mm (1.6 in)	19.1 mm (0.8 in)	36 years	30 of 100 (Routine)
8 July 2008	El Islote, MX	daily rain	59.9 mm (2.4 in)	24.1 mm (0.9 in)	32 years	33 of 100 (Routine)
7 July 2008	El Islote, MX	daily rain	39.9 mm (1.6 in)	5.1 mm (0.20 in)	21 years	13 of 100 (Routine)
11 June 2008	El Islote, MX	daily rain	39.9 mm (1.6 in)	7.6 mm (0.30 in)	14 years	13 of 100 (Routine)
9 June 2008	El Islote, MX	daily rain	59.9 mm (2.4 in)	10.1 mm (0.4 in)	5 years	12 of 100 (Routine)
12 May 2008	El Islote, MX	daily rain (Tie)	19.8 mm (0.8 in)	tie	18 years	2 of 100 (Routine)

Climate Trend

19 complete years, 1973 to 2008

One stripe for each of 19 complete years at El Islote, 1973 to 2008. Blue stripes are years cooler than the station's own mean of 15.2 C (59.4 F); red stripes are warmer. The coolest year was 1984, at 13.3 C (55.9 F), and the warmest was 2000, at 17.2 C (62.9 F). The strongest colour marks a difference of 2.0 C (3.6 F).

Annual mean temperature at El Islote as warming stripes, 1973 to 2008
Year	Annual mean temperature	Difference from the station mean
1973	16.4 C	+1.15 C
1975	15.1 C	-0.14 C
1976	15.0 C	-0.21 C
1977	15.3 C	+0.08 C
1978	15.4 C	+0.11 C
1979	15.6 C	+0.31 C
1980	15.2 C	-0.04 C
1981	15.1 C	-0.14 C
1982	15.3 C	+0.07 C
1983	14.4 C	-0.87 C
1984	13.3 C	-1.95 C
1985	13.6 C	-1.64 C
1986	13.7 C	-1.51 C
1988	14.3 C	-0.95 C
1999	16.5 C	+1.27 C
2000	17.2 C	+1.93 C
2003	16.2 C	+1.00 C
2004	15.9 C	+0.64 C
2008	16.2 C	+0.97 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

1972 to 2011

Yearly extremes at El Islote: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	40.0 C (104.0 F)	1998	28.9 C (84.0 F)	31
Coldest night (TNn)	-1.1 C (30.0 F)	1986	0.6 C (33.1 F)	31
Wettest day (Rx1day)	88.6 mm (3.5 in)	1979	56.6 mm (2.2 in)	37
Wettest five days (Rx5day)	190.2 mm (7.5 in)	1996	134.3 mm (5.3 in)	37
Longest dry spell (CDD)	158 days	1991	58 days	37

Hottest day (TXx)

The hottest day of the year at El Islote, 1972 to 2011. The record is 40.0 C (104.0 F) in 1998, marked on the chart; the median year is 28.9 C (84.0 F).

Hottest day (TXx) at El Islote by year
Year	Hottest day (TXx)
1972	35.0 C (95.0 F)
1973	33.9 C (93.0 F)
1974	31.7 C (89.1 F)
1975	30.0 C (86.0 F)
1976	26.7 C (80.1 F)
1977	27.8 C (82.0 F)
1978	30.0 C (86.0 F)
1979	28.9 C (84.0 F)
1980	28.9 C (84.0 F)
1981	28.9 C (84.0 F)
1982	29.4 C (84.9 F)
1983	30.6 C (87.1 F)
1984	28.9 C (84.0 F)
1985	27.2 C (81.0 F)
1986	28.9 C (84.0 F)
1987	27.8 C (82.0 F)
1988	31.7 C (89.1 F)
1989	25.6 C (78.1 F)
1990	23.9 C (75.0 F)
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	25.6 C (78.1 F)
1998	40.0 C (104.0 F)
1999	30.0 C (86.0 F)
2000	30.6 C (87.1 F)
2001	28.9 C (84.0 F)
2002	28.9 C (84.0 F)
2003	28.9 C (84.0 F)
2004	25.6 C (78.1 F)
2005	26.7 C (80.1 F)
2006	26.7 C (80.1 F)
2007	25.6 C (78.1 F)
2008	30.0 C (86.0 F)
2011	n/a

Coldest night (TNn)

The coldest night of the year at El Islote, 1972 to 2011. The record is -1.1 C (30.0 F) in 1986, marked on the chart; the median year is 0.6 C (33.1 F).

Coldest night (TNn) at El Islote by year
Year	Coldest night (TNn)
1972	-0.6 C (30.9 F)
1973	0.6 C (33.1 F)
1974	2.8 C (37.0 F)
1975	0.0 C (32.0 F)
1976	0.6 C (33.1 F)
1977	1.7 C (35.1 F)
1978	1.7 C (35.1 F)
1979	0.6 C (33.1 F)
1980	1.7 C (35.1 F)
1981	0.6 C (33.1 F)
1982	1.7 C (35.1 F)
1983	0.0 C (32.0 F)
1984	0.0 C (32.0 F)
1985	0.0 C (32.0 F)
1986	-1.1 C (30.0 F)
1987	0.0 C (32.0 F)
1988	-1.1 C (30.0 F)
1989	0.0 C (32.0 F)
1990	1.7 C (35.1 F)
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	12.2 C (54.0 F)
1998	5.6 C (42.1 F)
1999	0.0 C (32.0 F)
2000	3.9 C (39.0 F)
2001	0.6 C (33.1 F)
2002	0.6 C (33.1 F)
2003	3.9 C (39.0 F)
2004	6.7 C (44.1 F)
2005	6.7 C (44.1 F)
2006	5.0 C (41.0 F)
2007	6.7 C (44.1 F)
2008	7.8 C (46.0 F)
2011	n/a

Wettest day (Rx1day)

The wettest day of the year at El Islote, 1972 to 2011. The record is 88.6 mm (3.5 in) in 1979, marked on the chart; the median year is 56.6 mm (2.2 in).

Wettest day (Rx1day) at El Islote by year
Year	Wettest day (Rx1day)
1972	56.6 mm (2.2 in)
1973	56.4 mm (2.2 in)
1974	72.6 mm (2.9 in)
1975	64.8 mm (2.6 in)
1976	86.9 mm (3.4 in)
1977	38.9 mm (1.5 in)
1978	49.0 mm (1.9 in)
1979	88.6 mm (3.5 in)
1980	69.6 mm (2.7 in)
1981	80.3 mm (3.2 in)
1982	39.6 mm (1.6 in)
1983	61.0 mm (2.4 in)
1984	55.4 mm (2.2 in)
1985	85.1 mm (3.4 in)
1986	56.6 mm (2.2 in)
1987	39.9 mm (1.6 in)
1988	49.3 mm (1.9 in)
1989	41.9 mm (1.6 in)
1990	44.2 mm (1.7 in)
1991	55.9 mm (2.2 in)
1992	44.7 mm (1.8 in)
1993	60.2 mm (2.4 in)
1994	62.0 mm (2.4 in)
1995	72.9 mm (2.9 in)
1996	59.9 mm (2.4 in)
1998	64.8 mm (2.6 in)
1999	52.8 mm (2.1 in)
2000	64.8 mm (2.6 in)
2001	34.8 mm (1.4 in)
2002	19.8 mm (0.8 in)
2003	59.9 mm (2.4 in)
2004	22.9 mm (0.9 in)
2005	24.9 mm (1.0 in)
2006	49.8 mm (2.0 in)
2007	39.9 mm (1.6 in)
2008	79.8 mm (3.1 in)
2011	59.9 mm (2.4 in)

Wettest five days (Rx5day)

The wettest five days of the year at El Islote, 1972 to 2011. The record is 190.2 mm (7.5 in) in 1996, marked on the chart; the median year is 134.3 mm (5.3 in).

Wettest five days (Rx5day) at El Islote by year
Year	Wettest five days (Rx5day)
1972	135.1 mm (5.3 in)
1973	111.7 mm (4.4 in)
1974	136.6 mm (5.4 in)
1975	138.2 mm (5.4 in)
1976	177.2 mm (7.0 in)
1977	86.7 mm (3.4 in)
1978	103.9 mm (4.1 in)
1979	132.3 mm (5.2 in)
1980	174.1 mm (6.9 in)
1981	165.1 mm (6.5 in)
1982	93.7 mm (3.7 in)
1983	90.0 mm (3.5 in)
1984	121.5 mm (4.8 in)
1985	155.7 mm (6.1 in)
1986	92.7 mm (3.6 in)
1987	108.5 mm (4.3 in)
1988	160.8 mm (6.3 in)
1989	90.1 mm (3.5 in)
1990	124.8 mm (4.9 in)
1991	135.9 mm (5.4 in)
1992	99.3 mm (3.9 in)
1993	125.5 mm (4.9 in)
1994	138.0 mm (5.4 in)
1995	137.5 mm (5.4 in)
1996	190.2 mm (7.5 in)
1998	171.3 mm (6.7 in)
1999	134.3 mm (5.3 in)
2000	154.2 mm (6.1 in)
2001	78.2 mm (3.1 in)
2002	49.5 mm (1.9 in)
2003	159.5 mm (6.3 in)
2004	79.2 mm (3.1 in)
2005	84.3 mm (3.3 in)
2006	139.2 mm (5.5 in)
2007	77.8 mm (3.1 in)
2008	154.7 mm (6.1 in)
2011	174.6 mm (6.9 in)

Longest dry spell (CDD)

The longest dry spell of the year at El Islote, 1972 to 2011. The record is 158 days in 1991, marked on the chart; the median year is 58 days.

Longest dry spell (CDD) at El Islote by year
Year	Longest dry spell (CDD)
1972	33 days
1973	57 days
1974	51 days
1975	109 days
1976	41 days
1977	48 days
1978	38 days
1979	53 days
1980	59 days
1981	33 days
1982	52 days
1983	72 days
1984	63 days
1985	46 days
1986	55 days
1987	33 days
1988	72 days
1989	90 days
1990	71 days
1991	158 days
1992	49 days
1993	117 days
1994	58 days
1995	64 days
1996	107 days
1998	39 days
1999	85 days
2000	70 days
2001	50 days
2002	47 days
2003	87 days
2004	61 days
2005	73 days
2006	113 days
2007	48 days
2008	60 days
2011	30 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 El Islote standing records by year: CSV or JSON. Field meanings are on the data page.
Data for El Islote 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).