Siho Chac Weather Records (MXN00004072)

Record envelope, standing records and threshold days for Siho Chac (MXN00004072), Mexico, with 30 years of record.

Key Facts for Siho Chac

Siho Chac (MXN00004072) is a weather station in Mexico at 19.50 latitude and -90.58 longitude, 15 m (49 ft) above sea level.
The station reports from 1982 to 2011, 30 years of record.
1,464 records set at Siho Chac still stand.
Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

Location: Mexico, 19.50 latitude, -90.58 longitude.
Elevation: 15 m (49 ft).
Period of record: 1982 to 2011, 30 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 Siho Chac. 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 Siho Chac, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	38.3 C (100.9 F)	6.7 C (44.1 F)	n/a	n/a
Feb	40.0 C (104.0 F)	6.7 C (44.1 F)	n/a	n/a
Mar	43.9 C (111.0 F)	7.2 C (45.0 F)	n/a	n/a
Apr	44.4 C (111.9 F)	8.9 C (48.0 F)	n/a	n/a
May	43.9 C (111.0 F)	15.0 C (59.0 F)	n/a	n/a
Jun	41.7 C (107.1 F)	18.3 C (64.9 F)	n/a	n/a
Jul	40.6 C (105.1 F)	13.3 C (55.9 F)	n/a	n/a
Aug	40.0 C (104.0 F)	15.0 C (59.0 F)	n/a	n/a
Sep	40.0 C (104.0 F)	11.7 C (53.1 F)	n/a	n/a
Oct	41.7 C (107.1 F)	10.6 C (51.1 F)	n/a	n/a
Nov	37.8 C (100.0 F)	9.4 C (48.9 F)	n/a	n/a
Dec	38.9 C (102.0 F)	6.7 C (44.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Siho Chac still stand. 2004 holds the most, with 141.

Standing records at Siho Chac by the year they were set
Year set	Standing records
1982	120
1983	57
1984	61
1985	39
1986	49
1987	62
1988	53
1989	43
1990	31
1991	77
1992	33
1993	39
1994	19
1995	37
1996	30
1997	72
1998	88
1999	44
2000	37
2001	37
2002	27
2003	24
2004	141
2005	35
2006	36
2007	31
2008	40
2009	37
2010	37
2011	28

Wettest Day of Each Month

Sep: 190.8 mm (7.5 in)

The wettest day on record for each calendar month at Siho Chac. The most was 190.8 mm (7.5 in) on 22 September 2002.

Record daily precipitation for each month at Siho Chac
Month	Record daily precipitation (mm)	Date
Jan	61.0 mm (2.4 in)	10 January 1992
Feb	125.0 mm (4.9 in)	11 February 2007
Mar	36.8 mm (1.4 in)	13 March 2000
Apr	41.4 mm (1.6 in)	18 April 1985
May	83.8 mm (3.3 in)	27 May 2003
Jun	150.9 mm (5.9 in)	27 June 2010
Jul	146.1 mm (5.8 in)	1 July 1985
Aug	179.8 mm (7.1 in)	21 August 1996
Sep	190.8 mm (7.5 in)	22 September 2002
Oct	89.9 mm (3.5 in)	3 October 2006
Nov	174.0 mm (6.9 in)	18 November 2003
Dec	86.9 mm (3.4 in)	3 December 1991

Period of Record Coverage

1982 to 2011

30 years of record at Siho Chac, 1982 to 2011. 1 years have data for under 90 percent of days and are left out of rankings: 1982.

Days with data per year at Siho Chac
Year	Days with data	Share of year	Complete
1982	122	33%	No
1983	334	92%	Yes
1984	366	100%	Yes
1985	365	100%	Yes
1986	365	100%	Yes
1987	365	100%	Yes
1988	366	100%	Yes
1989	365	100%	Yes
1990	365	100%	Yes
1991	365	100%	Yes
1992	366	100%	Yes
1993	365	100%	Yes
1994	365	100%	Yes
1995	365	100%	Yes
1996	365	100%	Yes
1997	365	100%	Yes
1998	363	99%	Yes
1999	363	99%	Yes
2000	366	100%	Yes
2001	364	100%	Yes
2002	365	100%	Yes
2003	365	100%	Yes
2004	366	100%	Yes
2005	365	100%	Yes
2006	365	100%	Yes
2007	365	100%	Yes
2008	366	100%	Yes
2009	365	100%	Yes
2010	364	100%	Yes
2011	333	91%	Yes

Latest Records

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

Climate Trend

27 complete years, 1984 to 2010

One stripe for each of 27 complete years at Siho Chac, 1984 to 2010. Blue stripes are years cooler than the station's own mean of 27.2 C (81.0 F); red stripes are warmer. The coolest year was 1987, at 26.5 C (79.6 F), and the warmest was 1997, at 28.3 C (83.0 F). The strongest colour marks a difference of 1.1 C (2.0 F).

Annual mean temperature at Siho Chac as warming stripes, 1984 to 2010
Year	Annual mean temperature	Difference from the station mean
1984	26.6 C	-0.70 C
1985	26.5 C	-0.72 C
1986	26.5 C	-0.76 C
1987	26.5 C	-0.78 C
1988	26.8 C	-0.46 C
1989	26.7 C	-0.51 C
1990	27.4 C	+0.14 C
1991	28.0 C	+0.71 C
1992	27.7 C	+0.47 C
1993	26.8 C	-0.45 C
1994	27.7 C	+0.47 C
1995	27.9 C	+0.63 C
1996	27.2 C	-0.02 C
1997	28.3 C	+1.08 C
1998	27.7 C	+0.42 C
1999	27.4 C	+0.18 C
2000	27.9 C	+0.67 C
2001	27.1 C	-0.20 C
2002	26.8 C	-0.46 C
2003	27.2 C	-0.01 C
2004	27.8 C	+0.55 C
2005	27.2 C	-0.03 C
2006	27.0 C	-0.25 C
2007	27.6 C	+0.34 C
2008	27.1 C	-0.11 C
2009	27.6 C	+0.31 C
2010	26.7 C	-0.60 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

1982 to 2011

Yearly extremes at Siho Chac: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	44.4 C (111.9 F)	1991	41.2 C (106.1 F)	30
Coldest night (TNn)	6.7 C (44.1 F)	1985	10.0 C (50.0 F)	30
Wettest day (Rx1day)	190.8 mm (7.5 in)	2002	91.5 mm (3.6 in)	30
Wettest five days (Rx5day)	610.2 mm (24.0 in)	2002	147.1 mm (5.8 in)	30
Longest dry spell (CDD)	104 days	1998	52 days	30

Hottest day (TXx)

The hottest day of the year at Siho Chac, 1982 to 2011. The record is 44.4 C (111.9 F) in 1991, marked on the chart; the median year is 41.2 C (106.1 F).

Hottest day (TXx) at Siho Chac by year
Year	Hottest day (TXx)
1982	40.0 C (104.0 F)
1983	42.2 C (108.0 F)
1984	40.0 C (104.0 F)
1985	42.2 C (108.0 F)
1986	40.0 C (104.0 F)
1987	41.7 C (107.1 F)
1988	42.2 C (108.0 F)
1989	41.7 C (107.1 F)
1990	41.7 C (107.1 F)
1991	44.4 C (111.9 F)
1992	42.8 C (109.0 F)
1993	40.0 C (104.0 F)
1994	40.0 C (104.0 F)
1995	40.0 C (104.0 F)
1996	38.9 C (102.0 F)
1997	43.3 C (109.9 F)
1998	43.9 C (111.0 F)
1999	43.9 C (111.0 F)
2000	43.9 C (111.0 F)
2001	38.9 C (102.0 F)
2002	40.0 C (104.0 F)
2003	40.0 C (104.0 F)
2004	38.9 C (102.0 F)
2005	41.7 C (107.1 F)
2006	41.7 C (107.1 F)
2007	40.0 C (104.0 F)
2008	40.6 C (105.1 F)
2009	40.6 C (105.1 F)
2010	40.6 C (105.1 F)
2011	41.7 C (107.1 F)

Coldest night (TNn)

The coldest night of the year at Siho Chac, 1982 to 2011. The record is 6.7 C (44.1 F) in 1985, marked on the chart; the median year is 10.0 C (50.0 F).

Coldest night (TNn) at Siho Chac by year
Year	Coldest night (TNn)
1982	7.8 C (46.0 F)
1983	7.8 C (46.0 F)
1984	9.4 C (48.9 F)
1985	6.7 C (44.1 F)
1986	6.7 C (44.1 F)
1987	7.8 C (46.0 F)
1988	8.3 C (46.9 F)
1989	6.7 C (44.1 F)
1990	8.3 C (46.9 F)
1991	8.3 C (46.9 F)
1992	9.4 C (48.9 F)
1993	8.3 C (46.9 F)
1994	8.9 C (48.0 F)
1995	15.0 C (59.0 F)
1996	12.8 C (55.0 F)
1997	10.0 C (50.0 F)
1998	10.0 C (50.0 F)
1999	10.0 C (50.0 F)
2000	10.0 C (50.0 F)
2001	10.0 C (50.0 F)
2002	10.0 C (50.0 F)
2003	10.6 C (51.1 F)
2004	12.2 C (54.0 F)
2005	13.9 C (57.0 F)
2006	11.7 C (53.1 F)
2007	10.0 C (50.0 F)
2008	13.3 C (55.9 F)
2009	11.7 C (53.1 F)
2010	10.0 C (50.0 F)
2011	13.9 C (57.0 F)

Wettest day (Rx1day)

The wettest day of the year at Siho Chac, 1982 to 2011. The record is 190.8 mm (7.5 in) in 2002, marked on the chart; the median year is 91.5 mm (3.6 in).

Wettest day (Rx1day) at Siho Chac by year
Year	Wettest day (Rx1day)
1982	74.9 mm (2.9 in)
1983	81.3 mm (3.2 in)
1984	50.3 mm (2.0 in)
1985	146.1 mm (5.8 in)
1986	37.8 mm (1.5 in)
1987	101.6 mm (4.0 in)
1988	79.8 mm (3.1 in)
1989	60.2 mm (2.4 in)
1990	95.0 mm (3.7 in)
1991	86.9 mm (3.4 in)
1992	128.8 mm (5.1 in)
1993	42.9 mm (1.7 in)
1994	41.9 mm (1.6 in)
1995	93.0 mm (3.7 in)
1996	179.8 mm (7.1 in)
1997	111.0 mm (4.4 in)
1998	83.3 mm (3.3 in)
1999	88.4 mm (3.5 in)
2000	109.0 mm (4.3 in)
2001	68.8 mm (2.7 in)
2002	190.8 mm (7.5 in)
2003	174.0 mm (6.9 in)
2004	119.9 mm (4.7 in)
2005	89.4 mm (3.5 in)
2006	99.8 mm (3.9 in)
2007	125.0 mm (4.9 in)
2008	79.0 mm (3.1 in)
2009	89.9 mm (3.5 in)
2010	150.9 mm (5.9 in)
2011	142.0 mm (5.6 in)

Wettest five days (Rx5day)

The wettest five days of the year at Siho Chac, 1982 to 2011. The record is 610.2 mm (24.0 in) in 2002, marked on the chart; the median year is 147.1 mm (5.8 in).

Wettest five days (Rx5day) at Siho Chac by year
Year	Wettest five days (Rx5day)
1982	124.2 mm (4.9 in)
1983	126.5 mm (5.0 in)
1984	137.0 mm (5.4 in)
1985	308.2 mm (12.1 in)
1986	106.1 mm (4.2 in)
1987	135.1 mm (5.3 in)
1988	133.1 mm (5.2 in)
1989	121.1 mm (4.8 in)
1990	135.4 mm (5.3 in)
1991	121.7 mm (4.8 in)
1992	252.8 mm (10.0 in)
1993	134.8 mm (5.3 in)
1994	127.9 mm (5.0 in)
1995	233.4 mm (9.2 in)
1996	188.0 mm (7.4 in)
1997	187.7 mm (7.4 in)
1998	111.0 mm (4.4 in)
1999	193.3 mm (7.6 in)
2000	154.5 mm (6.1 in)
2001	94.5 mm (3.7 in)
2002	610.2 mm (24.0 in)
2003	183.9 mm (7.2 in)
2004	121.7 mm (4.8 in)
2005	150.0 mm (5.9 in)
2006	145.8 mm (5.7 in)
2007	182.0 mm (7.2 in)
2008	148.3 mm (5.8 in)
2009	149.4 mm (5.9 in)
2010	329.5 mm (13.0 in)
2011	332.5 mm (13.1 in)

Longest dry spell (CDD)

The longest dry spell of the year at Siho Chac, 1982 to 2011. The record is 104 days in 1998, marked on the chart; the median year is 52 days.

Longest dry spell (CDD) at Siho Chac by year
Year	Longest dry spell (CDD)
1982	23 days
1983	44 days
1984	51 days
1985	22 days
1986	88 days
1987	63 days
1988	44 days
1989	48 days
1990	27 days
1991	30 days
1992	54 days
1993	42 days
1994	47 days
1995	43 days
1996	37 days
1997	45 days
1998	104 days
1999	94 days
2000	63 days
2001	62 days
2002	53 days
2003	58 days
2004	74 days
2005	91 days
2006	78 days
2007	38 days
2008	73 days
2009	44 days
2010	61 days
2011	84 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 Siho Chac standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Siho Chac 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 2026-10-15 (15 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).