Tonameca Weather Records (MXN00020303)

Record envelope, standing records and threshold days for Tonameca (MXN00020303), Mexico, with 32 years of record.

Key Facts for Tonameca

Tonameca (MXN00020303) is a weather station in Mexico at 15.73 latitude and -96.53 longitude, 48 m (157 ft) above sea level.
The station reports from 1980 to 2011, 32 years of record.
1,464 records set at Tonameca still stand.
Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

Location: Mexico, 15.73 latitude, -96.53 longitude.
Elevation: 48 m (157 ft).
Period of record: 1980 to 2011, 32 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 Tonameca. 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 Tonameca, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	43.9 C (111.0 F)	8.9 C (48.0 F)	n/a	n/a
Feb	38.9 C (102.0 F)	7.2 C (45.0 F)	n/a	n/a
Mar	37.8 C (100.0 F)	7.8 C (46.0 F)	n/a	n/a
Apr	38.9 C (102.0 F)	10.0 C (50.0 F)	n/a	n/a
May	47.8 C (118.0 F)	11.7 C (53.1 F)	n/a	n/a
Jun	40.0 C (104.0 F)	10.6 C (51.1 F)	n/a	n/a
Jul	40.6 C (105.1 F)	15.0 C (59.0 F)	n/a	n/a
Aug	37.8 C (100.0 F)	15.0 C (59.0 F)	n/a	n/a
Sep	39.4 C (102.9 F)	12.8 C (55.0 F)	n/a	n/a
Oct	38.9 C (102.0 F)	10.0 C (50.0 F)	n/a	n/a
Nov	43.9 C (111.0 F)	8.9 C (48.0 F)	n/a	n/a
Dec	41.7 C (107.1 F)	8.9 C (48.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Tonameca still stand. 1980 holds the most, with 134.

Standing records at Tonameca by the year they were set
Year set	Standing records
1980	134
1981	126
1982	124
1983	70
1984	61
1985	35
1986	22
1987	31
1988	28
1989	51
1990	45
1991	92
1992	17
1993	11
1994	12
1995	40
2000	74
2001	63
2002	27
2003	42
2004	33
2005	53
2006	44
2007	36
2008	44
2009	36
2010	62
2011	51

Wettest Day of Each Month

Sep: 329.9 mm (13.0 in)

The wettest day on record for each calendar month at Tonameca. The most was 329.9 mm (13.0 in) on 20 September 1993.

Record daily precipitation for each month at Tonameca
Month	Record daily precipitation (mm)	Date
Jan	22.6 mm (0.9 in)	13 January 1995
Feb	38.4 mm (1.5 in)	1 February 1992
Mar	15.2 mm (0.6 in)	13 March 1983
Apr	30.2 mm (1.2 in)	25 April 1995
May	177.8 mm (7.0 in)	27 May 1986
Jun	159.8 mm (6.3 in)	27 June 1993
Jul	199.9 mm (7.9 in)	11 July 1984
Aug	280.2 mm (11.0 in)	27 August 1981
Sep	329.9 mm (13.0 in)	20 September 1993
Oct	108.0 mm (4.3 in)	5 October 2005
Nov	37.8 mm (1.5 in)	2 November 2002
Dec	38.4 mm (1.5 in)	24 December 1985

Period of Record Coverage

1980 to 2011

28 years of record at Tonameca, 1980 to 2011. 5 years have data for under 90 percent of days and are left out of rankings: 1980, 1981, 1991, 1995, 2010.

Days with data per year at Tonameca
Year	Days with data	Share of year	Complete
1980	222	61%	No
1981	183	50%	No
1982	365	100%	Yes
1983	365	100%	Yes
1984	366	100%	Yes
1985	334	92%	Yes
1986	365	100%	Yes
1987	365	100%	Yes
1988	366	100%	Yes
1989	365	100%	Yes
1990	365	100%	Yes
1991	306	84%	No
1992	366	100%	Yes
1993	334	92%	Yes
1994	365	100%	Yes
1995	156	43%	No
2000	342	93%	Yes
2001	362	99%	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	303	83%	No
2011	365	100%	Yes

Latest Records

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

Climate Trend

20 complete years, 1982 to 2011

One stripe for each of 20 complete years at Tonameca, 1982 to 2011. Blue stripes are years cooler than the station's own mean of 24.7 C (76.4 F); red stripes are warmer. The coolest year was 2011, at 22.7 C (72.8 F), and the warmest was 1982, at 27.1 C (80.7 F). The strongest colour marks a difference of 2.5 C (4.5 F).

Annual mean temperature at Tonameca as warming stripes, 1982 to 2011
Year	Annual mean temperature	Difference from the station mean
1982	27.1 C	+2.41 C
1983	26.4 C	+1.77 C
1984	26.0 C	+1.35 C
1986	26.0 C	+1.28 C
1987	26.1 C	+1.46 C
1988	26.0 C	+1.36 C
1989	25.9 C	+1.23 C
1990	26.3 C	+1.65 C
1992	26.0 C	+1.34 C
1994	25.7 C	+1.03 C
2001	23.3 C	-1.37 C
2002	23.6 C	-1.03 C
2003	23.5 C	-1.16 C
2004	23.6 C	-1.04 C
2005	23.0 C	-1.66 C
2006	23.1 C	-1.55 C
2007	23.0 C	-1.64 C
2008	22.8 C	-1.90 C
2009	23.2 C	-1.52 C
2011	22.7 C	-1.98 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

1980 to 2011

Yearly extremes at Tonameca: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	47.8 C (118.0 F)	1980	37.3 C (99.1 F)	28
Coldest night (TNn)	7.2 C (45.0 F)	2000	10.0 C (50.0 F)	28
Wettest day (Rx1day)	329.9 mm (13.0 in)	1993	84.4 mm (3.3 in)	28
Wettest five days (Rx5day)	626.4 mm (24.7 in)	1981	132.2 mm (5.2 in)	28
Longest dry spell (CDD)	161 days	1988	113 days	28

Hottest day (TXx)

The hottest day of the year at Tonameca, 1980 to 2011. The record is 47.8 C (118.0 F) in 1980, marked on the chart; the median year is 37.3 C (99.1 F).

Hottest day (TXx) at Tonameca by year
Year	Hottest day (TXx)
1980	47.8 C (118.0 F)
1981	43.9 C (111.0 F)
1982	40.0 C (104.0 F)
1983	38.9 C (102.0 F)
1984	36.7 C (98.1 F)
1985	38.9 C (102.0 F)
1986	38.9 C (102.0 F)
1987	35.6 C (96.1 F)
1988	38.9 C (102.0 F)
1989	38.9 C (102.0 F)
1990	37.8 C (100.0 F)
1991	38.9 C (102.0 F)
1992	37.8 C (100.0 F)
1993	37.8 C (100.0 F)
1994	36.7 C (98.1 F)
1995	35.6 C (96.1 F)
2000	37.8 C (100.0 F)
2001	35.6 C (96.1 F)
2002	35.0 C (95.0 F)
2003	33.9 C (93.0 F)
2004	35.6 C (96.1 F)
2005	32.8 C (91.0 F)
2006	33.9 C (93.0 F)
2007	35.0 C (95.0 F)
2008	35.6 C (96.1 F)
2009	39.4 C (102.9 F)
2010	35.0 C (95.0 F)
2011	34.4 C (93.9 F)

Coldest night (TNn)

The coldest night of the year at Tonameca, 1980 to 2011. The record is 7.2 C (45.0 F) in 2000, marked on the chart; the median year is 10.0 C (50.0 F).

Coldest night (TNn) at Tonameca by year
Year	Coldest night (TNn)
1980	13.3 C (55.9 F)
1981	13.9 C (57.0 F)
1982	10.6 C (51.1 F)
1983	11.7 C (53.1 F)
1984	13.9 C (57.0 F)
1985	12.8 C (55.0 F)
1986	11.7 C (53.1 F)
1987	10.0 C (50.0 F)
1988	10.0 C (50.0 F)
1989	10.0 C (50.0 F)
1990	10.6 C (51.1 F)
1991	10.6 C (51.1 F)
1992	10.6 C (51.1 F)
1993	12.8 C (55.0 F)
1994	10.6 C (51.1 F)
1995	10.0 C (50.0 F)
2000	7.2 C (45.0 F)
2001	10.6 C (51.1 F)
2002	10.0 C (50.0 F)
2003	7.8 C (46.0 F)
2004	10.0 C (50.0 F)
2005	7.8 C (46.0 F)
2006	10.0 C (50.0 F)
2007	7.8 C (46.0 F)
2008	8.9 C (48.0 F)
2009	8.9 C (48.0 F)
2010	8.9 C (48.0 F)
2011	10.0 C (50.0 F)

Wettest day (Rx1day)

The wettest day of the year at Tonameca, 1980 to 2011. The record is 329.9 mm (13.0 in) in 1993, marked on the chart; the median year is 84.4 mm (3.3 in).

Wettest day (Rx1day) at Tonameca by year
Year	Wettest day (Rx1day)
1980	20.6 mm (0.8 in)
1981	280.2 mm (11.0 in)
1982	60.5 mm (2.4 in)
1983	80.3 mm (3.2 in)
1984	199.9 mm (7.9 in)
1985	58.9 mm (2.3 in)
1986	177.8 mm (7.0 in)
1987	59.9 mm (2.4 in)
1988	61.0 mm (2.4 in)
1989	115.1 mm (4.5 in)
1990	51.8 mm (2.0 in)
1991	64.3 mm (2.5 in)
1992	84.1 mm (3.3 in)
1993	329.9 mm (13.0 in)
1994	107.7 mm (4.2 in)
1995	30.2 mm (1.2 in)
2000	129.8 mm (5.1 in)
2001	86.4 mm (3.4 in)
2002	95.0 mm (3.7 in)
2003	60.2 mm (2.4 in)
2004	145.3 mm (5.7 in)
2005	108.0 mm (4.3 in)
2006	70.9 mm (2.8 in)
2007	86.1 mm (3.4 in)
2008	133.4 mm (5.3 in)
2009	56.6 mm (2.2 in)
2010	82.6 mm (3.3 in)
2011	84.8 mm (3.3 in)

Wettest five days (Rx5day)

The wettest five days of the year at Tonameca, 1980 to 2011. The record is 626.4 mm (24.7 in) in 1981, marked on the chart; the median year is 132.2 mm (5.2 in).

Wettest five days (Rx5day) at Tonameca by year
Year	Wettest five days (Rx5day)
1980	56.9 mm (2.2 in)
1981	626.4 mm (24.7 in)
1982	118.9 mm (4.7 in)
1983	138.7 mm (5.5 in)
1984	248.7 mm (9.8 in)
1985	65.4 mm (2.6 in)
1986	234.0 mm (9.2 in)
1987	73.9 mm (2.9 in)
1988	132.3 mm (5.2 in)
1989	120.9 mm (4.8 in)
1990	59.0 mm (2.3 in)
1991	115.4 mm (4.5 in)
1992	132.0 mm (5.2 in)
1993	387.6 mm (15.3 in)
1994	112.8 mm (4.4 in)
1995	42.0 mm (1.7 in)
2000	179.1 mm (7.1 in)
2001	135.9 mm (5.4 in)
2002	229.4 mm (9.0 in)
2003	116.1 mm (4.6 in)
2004	239.9 mm (9.4 in)
2005	169.5 mm (6.7 in)
2006	141.5 mm (5.6 in)
2007	124.9 mm (4.9 in)
2008	266.3 mm (10.5 in)
2009	116.3 mm (4.6 in)
2010	181.7 mm (7.2 in)
2011	113.7 mm (4.5 in)

Longest dry spell (CDD)

The longest dry spell of the year at Tonameca, 1980 to 2011. The record is 161 days in 1988, marked on the chart; the median year is 113 days.

Longest dry spell (CDD) at Tonameca by year
Year	Longest dry spell (CDD)
1980	55 days
1981	149 days
1982	113 days
1983	83 days
1984	67 days
1985	53 days
1986	137 days
1987	154 days
1988	161 days
1989	89 days
1990	51 days
1991	80 days
1992	51 days
1993	95 days
1994	129 days
1995	84 days
2000	137 days
2001	127 days
2002	137 days
2003	101 days
2004	119 days
2005	137 days
2006	132 days
2007	54 days
2008	119 days
2009	132 days
2010	85 days
2011	112 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 Tonameca standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Tonameca 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).