Tlahuac Weather Records (MXN00009051)

Record envelope, standing records and threshold days for Tlahuac (MXN00009051), Mexico, with 52 years of record.

Key Facts for Tlahuac

Tlahuac (MXN00009051) is a weather station in Mexico at 19.25 latitude and -99.00 longitude, 2,240 m (7,349 ft) above sea level.
The station reports from 1961 to 2012, 52 years of record.
1,464 records set at Tlahuac still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Tlahuac tied a daily record high maximum temperature of 27.8 C (82.0 F) on 17 October 2012.

About the Station

Location: Mexico, 19.25 latitude, -99.00 longitude.
Elevation: 2,240 m (7,349 ft).
Period of record: 1961 to 2012, 52 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 Tlahuac. 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 Tlahuac, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	31.7 C (89.1 F)	-8.3 C (17.1 F)	n/a	n/a
Feb	33.9 C (93.0 F)	-7.2 C (19.0 F)	n/a	n/a
Mar	35.6 C (96.1 F)	-3.3 C (26.1 F)	n/a	n/a
Apr	38.3 C (100.9 F)	0.6 C (33.1 F)	n/a	n/a
May	37.8 C (100.0 F)	1.7 C (35.1 F)	n/a	n/a
Jun	36.7 C (98.1 F)	4.4 C (39.9 F)	n/a	n/a
Jul	35.0 C (95.0 F)	2.8 C (37.0 F)	n/a	n/a
Aug	35.0 C (95.0 F)	0.6 C (33.1 F)	n/a	n/a
Sep	32.8 C (91.0 F)	1.7 C (35.1 F)	n/a	n/a
Oct	31.7 C (89.1 F)	-2.2 C (28.0 F)	n/a	n/a
Nov	32.8 C (91.0 F)	-5.0 C (23.0 F)	n/a	n/a
Dec	35.6 C (96.1 F)	-5.0 C (23.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Tlahuac still stand. 2003 holds the most, with 166.

Standing records at Tlahuac by the year they were set
Year set	Standing records
1965	28
1966	61
1967	88
1968	65
1969	42
1970	43
1971	29
1972	12
1973	20
1974	40
1975	23
1976	25
1977	32
1978	115
1979	21
1980	48
1981	135
1982	16
1983	21
1984	17
1985	5
1986	4
1987	17
1988	13
1996	1
1997	6
1998	139
1999	1
2000	1
2001	4
2002	57
2003	166
2004	25
2005	50
2006	43
2007	19
2008	7
2011	13
2012	12

All-Time Record Progression

1 new records

1 all-time records were set at Tlahuac between 4 August 2003 and 4 August 2003. Each dot is a new record.

Wettest Day of Each Month

Sep: 65.8 mm (2.6 in)

The wettest day on record for each calendar month at Tlahuac. The most was 65.8 mm (2.6 in) on 29 September 1963.

Record daily precipitation for each month at Tlahuac
Month	Record daily precipitation (mm)	Date
Jan	51.8 mm (2.0 in)	10 January 1967
Feb	30.0 mm (1.2 in)	10 February 2012
Mar	34.8 mm (1.4 in)	16 March 1978
Apr	39.9 mm (1.6 in)	30 April 1972
May	49.8 mm (2.0 in)	23 May 1972
Jun	59.9 mm (2.4 in)	23 June 1983
Jul	63.5 mm (2.5 in)	4 July 2007
Aug	59.9 mm (2.4 in)	22 August 1965
Sep	65.8 mm (2.6 in)	29 September 1963
Oct	45.0 mm (1.8 in)	28 October 1977
Nov	17.8 mm (0.7 in)	10 November 1961
Dec	22.9 mm (0.9 in)	2 December 1976

Period of Record Coverage

1965 to 2012

39 years of record at Tlahuac, 1965 to 2012. 8 years have data for under 90 percent of days and are left out of rankings: 1965, 1996, 2000, 2001, 2003, 2004, 2008, 2012.

Days with data per year at Tlahuac
Year	Days with data	Share of year	Complete
1965	305	84%	No
1966	365	100%	Yes
1967	362	99%	Yes
1968	366	100%	Yes
1969	364	100%	Yes
1970	364	100%	Yes
1971	365	100%	Yes
1972	366	100%	Yes
1973	365	100%	Yes
1974	335	92%	Yes
1975	337	92%	Yes
1976	366	100%	Yes
1977	365	100%	Yes
1978	365	100%	Yes
1979	363	99%	Yes
1980	336	92%	Yes
1981	361	99%	Yes
1982	365	100%	Yes
1983	365	100%	Yes
1984	366	100%	Yes
1985	365	100%	Yes
1986	365	100%	Yes
1987	365	100%	Yes
1988	366	100%	Yes
1996	85	23%	No
1997	365	100%	Yes
1998	365	100%	Yes
1999	365	100%	Yes
2000	274	75%	No
2001	306	84%	No
2002	365	100%	Yes
2003	303	83%	No
2004	60	16%	No
2005	365	100%	Yes
2006	364	100%	Yes
2007	365	100%	Yes
2008	273	75%	No
2011	348	95%	Yes
2012	305	83%	No

Latest Records

Latest records at Tlahuac
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 October 2012	Tlahuac, MX	daily high max (Tie)	27.8 C (82.0 F)	tie	28 years	3 of 100 (Routine)
5 October 2012	Tlahuac, MX	daily low min	3.9 C (39.0 F)	1.7 C (3.1 F)	40 years	21 of 100 (Routine)
4 October 2012	Tlahuac, MX	daily low min (Tie)	3.9 C (39.0 F)	tie	40 years	4 of 100 (Routine)
29 September 2012	Tlahuac, MX	daily high max (Tie)	28.9 C (84.0 F)	tie	30 years	3 of 100 (Routine)
10 September 2012	Tlahuac, MX	daily high max (Tie)	28.9 C (84.0 F)	tie	34 years	3 of 100 (Routine)
8 September 2012	Tlahuac, MX	daily high max	28.9 C (84.0 F)	1.1 C (2.0 F)	6 years	9 of 100 (Routine)
7 September 2012	Tlahuac, MX	daily high max	28.9 C (84.0 F)	1.1 C (2.0 F)	25 years	15 of 100 (Routine)
6 September 2012	Tlahuac, MX	daily low min (Tie)	6.7 C (44.1 F)	tie	38 years	3 of 100 (Routine)
6 September 2012	Tlahuac, MX	daily high max (Tie)	28.9 C (84.0 F)	tie	25 years	2 of 100 (Routine)
4 September 2012	Tlahuac, MX	daily high max	28.9 C (84.0 F)	1.1 C (2.0 F)	34 years	18 of 100 (Routine)
4 September 2012	Tlahuac, MX	daily low min (Tie)	7.8 C (46.0 F)	tie	47 years	4 of 100 (Routine)
19 August 2012	Tlahuac, MX	monthly low min	0.6 C (33.1 F)	3.3 C (5.9 F)	31 years	40 of 100 (Notable)
18 August 2012	Tlahuac, MX	daily low min (Tie)	7.8 C (46.0 F)	tie	46 years	4 of 100 (Routine)
4 August 2012	Tlahuac, MX	daily high max (Tie)	27.8 C (82.0 F)	tie	35 years	3 of 100 (Routine)
15 July 2012	Tlahuac, MX	daily rain	25.4 mm (1.0 in)	2.5 mm (0.10 in)	1 year	8 of 100 (Routine)
9 July 2012	Tlahuac, MX	daily rain	35.8 mm (1.4 in)	23.4 mm (0.9 in)	15 years	38 of 100 (Notable)
7 July 2012	Tlahuac, MX	daily low min (Tie)	7.8 C (46.0 F)	tie	41 years	4 of 100 (Routine)
30 June 2012	Tlahuac, MX	daily high max	30.0 C (86.0 F)	1.1 C (2.0 F)	40 years	19 of 100 (Routine)
29 June 2012	Tlahuac, MX	daily high max (Tie)	30.0 C (86.0 F)	tie	34 years	3 of 100 (Routine)
28 June 2012	Tlahuac, MX	daily rain	20.3 mm (0.8 in)	0.5 mm (0.02 in)	26 years	12 of 100 (Routine)

Climate Trend

27 complete years, 1966 to 2007

One stripe for each of 27 complete years at Tlahuac, 1966 to 2007. Blue stripes are years cooler than the station's own mean of 16.5 C (61.6 F); red stripes are warmer. The coolest year was 1967, at 14.5 C (58.1 F), and the warmest was 1998, at 19.2 C (66.5 F). The strongest colour marks a difference of 2.8 C (5.0 F).

Annual mean temperature at Tlahuac as warming stripes, 1966 to 2007
Year	Annual mean temperature	Difference from the station mean
1966	15.2 C	-1.31 C
1967	14.5 C	-1.98 C
1968	14.7 C	-1.75 C
1969	15.3 C	-1.20 C
1970	15.0 C	-1.43 C
1971	15.3 C	-1.21 C
1972	15.8 C	-0.66 C
1973	15.9 C	-0.56 C
1976	15.4 C	-1.05 C
1977	15.5 C	-0.96 C
1978	17.2 C	+0.76 C
1979	16.0 C	-0.44 C
1981	17.1 C	+0.62 C
1982	16.5 C	+0.01 C
1983	16.6 C	+0.16 C
1984	16.1 C	-0.35 C
1985	16.0 C	-0.49 C
1986	16.2 C	-0.29 C
1987	16.5 C	0.00 C
1988	16.5 C	+0.03 C
1997	18.8 C	+2.36 C
1998	19.2 C	+2.73 C
1999	17.8 C	+1.31 C
2002	18.4 C	+1.89 C
2005	18.2 C	+1.75 C
2006	18.2 C	+1.77 C
2007	16.8 C	+0.29 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

1961 to 2012

Yearly extremes at Tlahuac: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	38.3 C (100.9 F)	1981	31.7 C (89.1 F)	39
Coldest night (TNn)	-8.3 C (17.1 F)	1967	-2.2 C (28.0 F)	39
Wettest day (Rx1day)	65.8 mm (2.6 in)	1963	35.8 mm (1.4 in)	43
Wettest five days (Rx5day)	142.2 mm (5.6 in)	2007	62.7 mm (2.5 in)	43
Longest dry spell (CDD)	187 days	1998	73 days	43

Hottest day (TXx)

The hottest day of the year at Tlahuac, 1961 to 2012. The record is 38.3 C (100.9 F) in 1981, marked on the chart; the median year is 31.7 C (89.1 F).

Hottest day (TXx) at Tlahuac by year
Year	Hottest day (TXx)
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	31.7 C (89.1 F)
1966	35.0 C (95.0 F)
1967	31.7 C (89.1 F)
1968	29.4 C (84.9 F)
1969	31.1 C (88.0 F)
1970	31.7 C (89.1 F)
1971	31.7 C (89.1 F)
1972	30.0 C (86.0 F)
1973	32.8 C (91.0 F)
1974	30.6 C (87.1 F)
1975	30.6 C (87.1 F)
1976	30.0 C (86.0 F)
1977	31.7 C (89.1 F)
1978	37.8 C (100.0 F)
1979	30.6 C (87.1 F)
1980	35.6 C (96.1 F)
1981	38.3 C (100.9 F)
1982	32.8 C (91.0 F)
1983	33.9 C (93.0 F)
1984	31.7 C (89.1 F)
1985	31.7 C (89.1 F)
1986	31.7 C (89.1 F)
1987	30.6 C (87.1 F)
1988	35.0 C (95.0 F)
1996	30.0 C (86.0 F)
1997	29.4 C (84.9 F)
1998	37.8 C (100.0 F)
1999	31.1 C (88.0 F)
2000	30.0 C (86.0 F)
2001	28.9 C (84.0 F)
2002	31.7 C (89.1 F)
2003	27.8 C (82.0 F)
2004	28.9 C (84.0 F)
2005	36.7 C (98.1 F)
2006	35.6 C (96.1 F)
2007	32.8 C (91.0 F)
2008	33.9 C (93.0 F)
2011	33.9 C (93.0 F)
2012	33.9 C (93.0 F)

Coldest night (TNn)

The coldest night of the year at Tlahuac, 1961 to 2012. The record is -8.3 C (17.1 F) in 1967, marked on the chart; the median year is -2.2 C (28.0 F).

Coldest night (TNn) at Tlahuac by year
Year	Coldest night (TNn)
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	0.0 C (32.0 F)
1966	-5.0 C (23.0 F)
1967	-8.3 C (17.1 F)
1968	-5.0 C (23.0 F)
1969	-4.4 C (24.1 F)
1970	-5.0 C (23.0 F)
1971	-2.2 C (28.0 F)
1972	-3.3 C (26.1 F)
1973	-6.1 C (21.0 F)
1974	-3.3 C (26.1 F)
1975	-5.0 C (23.0 F)
1976	-7.2 C (19.0 F)
1977	-1.1 C (30.0 F)
1978	-2.2 C (28.0 F)
1979	1.7 C (35.1 F)
1980	-7.2 C (19.0 F)
1981	-2.2 C (28.0 F)
1982	-3.3 C (26.1 F)
1983	-2.2 C (28.0 F)
1984	-1.1 C (30.0 F)
1985	-1.1 C (30.0 F)
1986	-5.0 C (23.0 F)
1987	-4.4 C (24.1 F)
1988	-2.2 C (28.0 F)
1996	5.6 C (42.1 F)
1997	7.2 C (45.0 F)
1998	6.1 C (43.0 F)
1999	5.6 C (42.1 F)
2000	7.8 C (46.0 F)
2001	5.0 C (41.0 F)
2002	3.9 C (39.0 F)
2003	8.9 C (48.0 F)
2004	10.0 C (50.0 F)
2005	-3.3 C (26.1 F)
2006	-2.2 C (28.0 F)
2007	0.6 C (33.1 F)
2008	-2.2 C (28.0 F)
2011	-2.2 C (28.0 F)
2012	-3.3 C (26.1 F)

Wettest day (Rx1day)

The wettest day of the year at Tlahuac, 1961 to 2012. The record is 65.8 mm (2.6 in) in 1963, marked on the chart; the median year is 35.8 mm (1.4 in).

Wettest day (Rx1day) at Tlahuac by year
Year	Wettest day (Rx1day)
1961	40.1 mm (1.6 in)
1962	36.8 mm (1.4 in)
1963	65.8 mm (2.6 in)
1964	31.8 mm (1.3 in)
1965	59.9 mm (2.4 in)
1966	25.9 mm (1.0 in)
1967	51.8 mm (2.0 in)
1968	45.0 mm (1.8 in)
1969	34.8 mm (1.4 in)
1970	49.8 mm (2.0 in)
1971	27.9 mm (1.1 in)
1972	49.8 mm (2.0 in)
1973	39.9 mm (1.6 in)
1974	43.9 mm (1.7 in)
1975	33.8 mm (1.3 in)
1976	39.9 mm (1.6 in)
1977	45.0 mm (1.8 in)
1978	34.8 mm (1.4 in)
1979	53.8 mm (2.1 in)
1980	43.9 mm (1.7 in)
1981	26.9 mm (1.1 in)
1982	20.8 mm (0.8 in)
1983	59.9 mm (2.4 in)
1984	33.8 mm (1.3 in)
1985	21.8 mm (0.9 in)
1986	32.8 mm (1.3 in)
1987	27.9 mm (1.1 in)
1988	47.0 mm (1.9 in)
1996	15.7 mm (0.6 in)
1997	37.8 mm (1.5 in)
1998	30.0 mm (1.2 in)
1999	30.5 mm (1.2 in)
2000	35.8 mm (1.4 in)
2001	35.8 mm (1.4 in)
2002	25.9 mm (1.0 in)
2003	38.9 mm (1.5 in)
2004	0.0 mm (0.00 in)
2005	25.4 mm (1.0 in)
2006	42.9 mm (1.7 in)
2007	63.5 mm (2.5 in)
2008	22.4 mm (0.9 in)
2011	55.4 mm (2.2 in)
2012	35.8 mm (1.4 in)

Wettest five days (Rx5day)

The wettest five days of the year at Tlahuac, 1961 to 2012. The record is 142.2 mm (5.6 in) in 2007, marked on the chart; the median year is 62.7 mm (2.5 in).

Wettest five days (Rx5day) at Tlahuac by year
Year	Wettest five days (Rx5day)
1961	61.9 mm (2.4 in)
1962	61.5 mm (2.4 in)
1963	88.3 mm (3.5 in)
1964	92.0 mm (3.6 in)
1965	79.7 mm (3.1 in)
1966	48.9 mm (1.9 in)
1967	72.7 mm (2.9 in)
1968	74.7 mm (2.9 in)
1969	65.2 mm (2.6 in)
1970	72.7 mm (2.9 in)
1971	68.3 mm (2.7 in)
1972	72.4 mm (2.9 in)
1973	58.5 mm (2.3 in)
1974	73.9 mm (2.9 in)
1975	54.4 mm (2.1 in)
1976	81.8 mm (3.2 in)
1977	57.7 mm (2.3 in)
1978	73.2 mm (2.9 in)
1979	94.5 mm (3.7 in)
1980	101.1 mm (4.0 in)
1981	50.1 mm (2.0 in)
1982	50.6 mm (2.0 in)
1983	130.5 mm (5.1 in)
1984	99.9 mm (3.9 in)
1985	62.7 mm (2.5 in)
1986	59.8 mm (2.4 in)
1987	42.1 mm (1.7 in)
1988	78.8 mm (3.1 in)
1996	25.6 mm (1.0 in)
1997	62.7 mm (2.5 in)
1998	45.2 mm (1.8 in)
1999	30.5 mm (1.2 in)
2000	47.7 mm (1.9 in)
2001	35.8 mm (1.4 in)
2002	40.9 mm (1.6 in)
2003	60.7 mm (2.4 in)
2004	0.0 mm (0.00 in)
2005	50.6 mm (2.0 in)
2006	68.0 mm (2.7 in)
2007	142.2 mm (5.6 in)
2008	45.5 mm (1.8 in)
2011	110.0 mm (4.3 in)
2012	57.1 mm (2.2 in)

Longest dry spell (CDD)

The longest dry spell of the year at Tlahuac, 1961 to 2012. The record is 187 days in 1998, marked on the chart; the median year is 73 days.

Longest dry spell (CDD) at Tlahuac by year
Year	Longest dry spell (CDD)
1961	53 days
1962	101 days
1963	77 days
1964	87 days
1965	50 days
1966	58 days
1967	67 days
1968	47 days
1969	76 days
1970	81 days
1971	76 days
1972	70 days
1973	57 days
1974	73 days
1975	75 days
1976	40 days
1977	63 days
1978	52 days
1979	74 days
1980	60 days
1981	100 days
1982	87 days
1983	68 days
1984	65 days
1985	70 days
1986	92 days
1987	62 days
1988	68 days
1996	76 days
1997	77 days
1998	187 days
1999	157 days
2000	104 days
2001	127 days
2002	78 days
2003	78 days
2004	59 days
2005	51 days
2006	83 days
2007	70 days
2008	41 days
2011	104 days
2012	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.

Rainfall Return Levels

36 years, 1961 to 2011

A day with at least 38.8 mm (1.5 in) of rain is expected about once in 2 years. A day with at least 74.6 mm (2.9 in) of rain is expected about once in 100 years.

Rainfall return levels at Tlahuac: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	38.8 mm (1.5 in)
5 years	50.0 mm (2.0 in)
10 years	56.7 mm (2.2 in)
25 years	64.5 mm (2.5 in)
50 years	69.7 mm (2.7 in)	Longer than the 36 years of record
100 years	74.6 mm (2.9 in)	Longer than the 36 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, 36 years of values from 1961 to 2011.

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: 65.8 mm (2.6 in) in 1963; 63.5 mm (2.5 in) in 2007; 59.9 mm (2.4 in) in 1965.

Download the Data

Data for Tlahuac standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Tlahuac 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).