Tepacaltepec Weather Records (MXN00016128)

Record envelope, standing records and threshold days for Tepacaltepec (MXN00016128), Mexico, with 41 years of record.

Key Facts for Tepacaltepec

Tepacaltepec (MXN00016128) is a weather station in Mexico at 19.18 latitude and -102.83 longitude, 365 m (1,197 ft) above sea level.
The station reports from 1943 to 1983, 41 years of record.
1,464 records set at Tepacaltepec still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Tepacaltepec tied a daily record high maximum temperature of 37.8 C (100.0 F) on 24 December 1983.

About the Station

Location: Mexico, 19.18 latitude, -102.83 longitude.
Elevation: 365 m (1,197 ft).
Period of record: 1943 to 1983, 41 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 Tepacaltepec. 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 Tepacaltepec, 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)	6.7 C (44.1 F)	n/a	n/a
Feb	41.7 C (107.1 F)	11.7 C (53.1 F)	n/a	n/a
Mar	46.7 C (116.1 F)	12.8 C (55.0 F)	n/a	n/a
Apr	45.6 C (114.1 F)	15.0 C (59.0 F)	n/a	n/a
May	46.7 C (116.1 F)	16.7 C (62.1 F)	n/a	n/a
Jun	46.7 C (116.1 F)	18.9 C (66.0 F)	n/a	n/a
Jul	47.8 C (118.0 F)	18.9 C (66.0 F)	n/a	n/a
Aug	46.7 C (116.1 F)	18.9 C (66.0 F)	n/a	n/a
Sep	41.7 C (107.1 F)	16.7 C (62.1 F)	n/a	n/a
Oct	42.2 C (108.0 F)	17.2 C (63.0 F)	n/a	n/a
Nov	40.6 C (105.1 F)	15.0 C (59.0 F)	n/a	n/a
Dec	38.9 C (102.0 F)	8.9 C (48.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Tepacaltepec still stand. 1956 holds the most, with 81.

Standing records at Tepacaltepec by the year they were set
Year set	Standing records
1943	8
1944	36
1945	17
1946	48
1947	50
1948	73
1949	39
1950	36
1951	33
1952	40
1953	35
1954	27
1955	43
1956	81
1957	22
1958	31
1959	20
1960	36
1961	66
1962	32
1963	46
1964	25
1965	44
1966	31
1967	17
1968	81
1969	68
1970	15
1971	25
1972	20
1973	7
1974	40
1975	80
1976	41
1977	26
1978	2
1980	2
1981	21
1982	60
1983	40

All-Time Record Progression

2 new records

2 all-time records were set at Tepacaltepec between 9 July 1975 and 26 July 1981. Each dot is a new record.

When Tepacaltepec set new all-time records
Date	Kind	Detail
1975-07-09	Record high maximum temperature	Record high maximum temperature 47.8 C (118.0 F)
1981-07-26	Record daily precipitation	Record daily precipitation 110.0 mm (4.3 in)

Wettest Day of Each Month

Jul: 110.0 mm (4.3 in)

The wettest day on record for each calendar month at Tepacaltepec. The most was 110.0 mm (4.3 in) on 26 July 1981.

Record daily precipitation for each month at Tepacaltepec
Month	Record daily precipitation (mm)	Date
Jan	40.9 mm (1.6 in)	17 January 1958
Feb	8.4 mm (0.33 in)	21 February 1965
Mar	59.9 mm (2.4 in)	4 March 1968
Apr	59.9 mm (2.4 in)	16 April 1959
May	61.5 mm (2.4 in)	26 May 1983
Jun	77.5 mm (3.1 in)	19 June 1974
Jul	110.0 mm (4.3 in)	26 July 1981
Aug	89.9 mm (3.5 in)	11 August 1955
Sep	79.8 mm (3.1 in)	17 September 1976
Oct	89.9 mm (3.5 in)	27 October 1959
Nov	50.3 mm (2.0 in)	16 November 1976
Dec	31.0 mm (1.2 in)	26 December 1958

Period of Record Coverage

1943 to 1983

40 years of record at Tepacaltepec, 1943 to 1983. 9 years have data for under 90 percent of days and are left out of rankings: 1943, 1945, 1969, 1970, 1971, 1972, 1977, 1978 and others.

Days with data per year at Tepacaltepec
Year	Days with data	Share of year	Complete
1943	305	84%	No
1944	365	100%	Yes
1945	241	66%	No
1946	363	99%	Yes
1947	364	100%	Yes
1948	366	100%	Yes
1949	365	100%	Yes
1950	365	100%	Yes
1951	362	99%	Yes
1952	362	99%	Yes
1953	363	99%	Yes
1954	365	100%	Yes
1955	365	100%	Yes
1956	366	100%	Yes
1957	365	100%	Yes
1958	357	98%	Yes
1959	364	100%	Yes
1960	365	100%	Yes
1961	365	100%	Yes
1962	364	100%	Yes
1963	365	100%	Yes
1964	365	100%	Yes
1965	365	100%	Yes
1966	364	100%	Yes
1967	363	99%	Yes
1968	336	92%	Yes
1969	274	75%	No
1970	181	50%	No
1971	212	58%	No
1972	274	75%	No
1973	364	100%	Yes
1974	334	92%	Yes
1975	357	98%	Yes
1976	366	100%	Yes
1977	273	75%	No
1978	30	8%	No
1980	61	17%	No
1981	364	100%	Yes
1982	364	100%	Yes
1983	364	100%	Yes

Latest Records

Latest records at Tepacaltepec
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
24 December 1983	Tepacaltepec, MX	daily high max (Tie)	37.8 C (100.0 F)	tie	40 years	4 of 100 (Routine)
23 December 1983	Tepacaltepec, MX	monthly high max (Tie)	38.9 C (102.0 F)	tie	23 years	5 of 100 (Routine)
22 December 1983	Tepacaltepec, MX	daily high max	37.8 C (100.0 F)	2.2 C (4.0 F)	37 years	23 of 100 (Routine)
20 December 1983	Tepacaltepec, MX	daily high max (Tie)	36.7 C (98.1 F)	tie	1 year	1 of 100 (Routine)
18 December 1983	Tepacaltepec, MX	daily low min (Tie)	15.6 C (60.1 F)	tie	16 years	2 of 100 (Routine)
6 December 1983	Tepacaltepec, MX	daily low max	28.9 C (84.0 F)	0.5 C (0.9 F)	38 years	16 of 100 (Routine)
5 December 1983	Tepacaltepec, MX	daily low max	23.9 C (75.0 F)	5.5 C (9.9 F)	16 years	29 of 100 (Routine)
5 December 1983	Tepacaltepec, MX	daily rain	1.8 mm (0.07 in)	1.8 mm (0.07 in)	40 years	17 of 100 (Routine)
30 November 1983	Tepacaltepec, MX	daily high max (Tie)	37.2 C (99.0 F)	tie	14 years	2 of 100 (Routine)
25 November 1983	Tepacaltepec, MX	daily low min	17.8 C (64.0 F)	1.1 C (2.0 F)	20 years	15 of 100 (Routine)
20 November 1983	Tepacaltepec, MX	daily low min (Tie)	17.2 C (63.0 F)	tie	20 years	2 of 100 (Routine)
8 November 1983	Tepacaltepec, MX	daily rain	19.8 mm (0.8 in)	6.8 mm (0.27 in)	29 years	17 of 100 (Routine)
29 October 1983	Tepacaltepec, MX	daily low min (Tie)	19.4 C (66.9 F)	tie	30 years	3 of 100 (Routine)
28 October 1983	Tepacaltepec, MX	daily low min (Tie)	19.4 C (66.9 F)	tie	30 years	3 of 100 (Routine)
18 October 1983	Tepacaltepec, MX	daily low max	25.0 C (77.0 F)	6.7 C (12.1 F)	28 years	37 of 100 (Notable)
1 October 1983	Tepacaltepec, MX	daily rain	25.9 mm (1.0 in)	4.1 mm (0.16 in)	28 years	14 of 100 (Routine)
30 September 1983	Tepacaltepec, MX	daily low max	30.0 C (86.0 F)	1.7 C (3.1 F)	40 years	22 of 100 (Routine)
28 September 1983	Tepacaltepec, MX	daily low max (Tie)	30.0 C (86.0 F)	tie	20 years	2 of 100 (Routine)
27 September 1983	Tepacaltepec, MX	daily low max (Tie)	30.0 C (86.0 F)	tie	20 years	2 of 100 (Routine)
22 September 1983	Tepacaltepec, MX	daily low min	21.1 C (70.0 F)	0.6 C (1.1 F)	38 years	19 of 100 (Routine)

Climate Trend

28 complete years, 1946 to 1983

One stripe for each of 28 complete years at Tepacaltepec, 1946 to 1983. Blue stripes are years cooler than the station's own mean of 28.8 C (83.9 F); red stripes are warmer. The coolest year was 1976, at 27.0 C (80.6 F), and the warmest was 1965, at 29.9 C (85.7 F). The strongest colour marks a difference of 1.9 C (3.4 F).

Annual mean temperature at Tepacaltepec as warming stripes, 1946 to 1983
Year	Annual mean temperature	Difference from the station mean
1946	29.5 C	+0.64 C
1947	29.1 C	+0.28 C
1948	29.7 C	+0.82 C
1949	28.8 C	-0.02 C
1950	28.8 C	-0.01 C
1951	28.5 C	-0.37 C
1952	28.6 C	-0.21 C
1953	29.8 C	+0.91 C
1954	29.1 C	+0.25 C
1955	28.1 C	-0.80 C
1956	27.4 C	-1.41 C
1957	29.6 C	+0.78 C
1958	28.3 C	-0.58 C
1959	28.7 C	-0.14 C
1960	29.4 C	+0.55 C
1961	29.3 C	+0.41 C
1962	28.8 C	-0.09 C
1963	29.0 C	+0.15 C
1964	28.5 C	-0.39 C
1965	29.9 C	+1.00 C
1966	29.4 C	+0.52 C
1967	28.3 C	-0.57 C
1973	29.2 C	+0.38 C
1975	28.5 C	-0.39 C
1976	27.0 C	-1.86 C
1981	28.5 C	-0.32 C
1982	29.8 C	+0.90 C
1983	28.3 C	-0.54 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

1943 to 1983

Yearly extremes at Tepacaltepec: 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)	1975	43.6 C (110.5 F)	40
Coldest night (TNn)	6.7 C (44.1 F)	1958	14.2 C (57.5 F)	40
Wettest day (Rx1day)	110.0 mm (4.3 in)	1981	55.9 mm (2.2 in)	40
Wettest five days (Rx5day)	210.1 mm (8.3 in)	1974	88.8 mm (3.5 in)	40
Longest dry spell (CDD)	167 days	1957	90 days	40

Hottest day (TXx)

The hottest day of the year at Tepacaltepec, 1943 to 1983. The record is 47.8 C (118.0 F) in 1975, marked on the chart; the median year is 43.6 C (110.5 F).

Hottest day (TXx) at Tepacaltepec by year
Year	Hottest day (TXx)
1943	42.2 C (108.0 F)
1944	43.9 C (111.0 F)
1945	41.1 C (106.0 F)
1946	42.2 C (108.0 F)
1947	42.2 C (108.0 F)
1948	43.9 C (111.0 F)
1949	43.9 C (111.0 F)
1950	44.4 C (111.9 F)
1951	40.6 C (105.1 F)
1952	40.6 C (105.1 F)
1953	46.7 C (116.1 F)
1954	41.1 C (106.0 F)
1955	41.1 C (106.0 F)
1956	36.7 C (98.1 F)
1957	42.8 C (109.0 F)
1958	44.4 C (111.9 F)
1959	42.8 C (109.0 F)
1960	42.8 C (109.0 F)
1961	45.0 C (113.0 F)
1962	45.0 C (113.0 F)
1963	43.3 C (109.9 F)
1964	42.8 C (109.0 F)
1965	43.9 C (111.0 F)
1966	44.4 C (111.9 F)
1967	40.6 C (105.1 F)
1968	45.0 C (113.0 F)
1969	43.9 C (111.0 F)
1970	43.9 C (111.0 F)
1971	46.7 C (116.1 F)
1972	46.1 C (115.0 F)
1973	43.9 C (111.0 F)
1974	41.1 C (106.0 F)
1975	47.8 C (118.0 F)
1976	40.0 C (104.0 F)
1977	41.7 C (107.1 F)
1978	37.8 C (100.0 F)
1980	38.3 C (100.9 F)
1981	43.9 C (111.0 F)
1982	45.0 C (113.0 F)
1983	45.6 C (114.1 F)

Coldest night (TNn)

The coldest night of the year at Tepacaltepec, 1943 to 1983. The record is 6.7 C (44.1 F) in 1958, marked on the chart; the median year is 14.2 C (57.5 F).

Coldest night (TNn) at Tepacaltepec by year
Year	Coldest night (TNn)
1943	16.7 C (62.1 F)
1944	15.6 C (60.1 F)
1945	12.2 C (54.0 F)
1946	16.1 C (61.0 F)
1947	16.7 C (62.1 F)
1948	16.7 C (62.1 F)
1949	17.2 C (63.0 F)
1950	16.7 C (62.1 F)
1951	16.1 C (61.0 F)
1952	17.2 C (63.0 F)
1953	14.4 C (57.9 F)
1954	15.6 C (60.1 F)
1955	17.2 C (63.0 F)
1956	17.2 C (63.0 F)
1957	15.0 C (59.0 F)
1958	6.7 C (44.1 F)
1959	11.7 C (53.1 F)
1960	11.7 C (53.1 F)
1961	13.9 C (57.0 F)
1962	15.6 C (60.1 F)
1963	12.8 C (55.0 F)
1964	13.9 C (57.0 F)
1965	12.8 C (55.0 F)
1966	15.0 C (59.0 F)
1967	13.9 C (57.0 F)
1968	13.9 C (57.0 F)
1969	15.0 C (59.0 F)
1970	11.7 C (53.1 F)
1971	11.1 C (52.0 F)
1972	13.9 C (57.0 F)
1973	12.8 C (55.0 F)
1974	15.0 C (59.0 F)
1975	8.9 C (48.0 F)
1976	10.0 C (50.0 F)
1977	11.1 C (52.0 F)
1978	18.9 C (66.0 F)
1980	16.1 C (61.0 F)
1981	12.8 C (55.0 F)
1982	13.9 C (57.0 F)
1983	12.8 C (55.0 F)

Wettest day (Rx1day)

The wettest day of the year at Tepacaltepec, 1943 to 1983. The record is 110.0 mm (4.3 in) in 1981, marked on the chart; the median year is 55.9 mm (2.2 in).

Wettest day (Rx1day) at Tepacaltepec by year
Year	Wettest day (Rx1day)
1943	51.8 mm (2.0 in)
1944	46.5 mm (1.8 in)
1945	33.3 mm (1.3 in)
1946	50.3 mm (2.0 in)
1947	45.5 mm (1.8 in)
1948	56.9 mm (2.2 in)
1949	54.9 mm (2.2 in)
1950	35.8 mm (1.4 in)
1951	45.0 mm (1.8 in)
1952	43.9 mm (1.7 in)
1953	53.8 mm (2.1 in)
1954	50.3 mm (2.0 in)
1955	89.9 mm (3.5 in)
1956	41.4 mm (1.6 in)
1957	45.5 mm (1.8 in)
1958	46.0 mm (1.8 in)
1959	89.9 mm (3.5 in)
1960	75.9 mm (3.0 in)
1961	50.8 mm (2.0 in)
1962	63.5 mm (2.5 in)
1963	79.0 mm (3.1 in)
1964	57.9 mm (2.3 in)
1965	74.4 mm (2.9 in)
1966	88.9 mm (3.5 in)
1967	62.5 mm (2.5 in)
1968	78.0 mm (3.1 in)
1969	63.5 mm (2.5 in)
1970	3.3 mm (0.13 in)
1971	61.5 mm (2.4 in)
1972	41.9 mm (1.6 in)
1973	79.8 mm (3.1 in)
1974	77.5 mm (3.1 in)
1975	29.2 mm (1.1 in)
1976	79.8 mm (3.1 in)
1977	59.9 mm (2.4 in)
1978	9.9 mm (0.39 in)
1980	4.6 mm (0.18 in)
1981	110.0 mm (4.3 in)
1982	59.9 mm (2.4 in)
1983	61.5 mm (2.4 in)

Wettest five days (Rx5day)

The wettest five days of the year at Tepacaltepec, 1943 to 1983. The record is 210.1 mm (8.3 in) in 1974, marked on the chart; the median year is 88.8 mm (3.5 in).

Wettest five days (Rx5day) at Tepacaltepec by year
Year	Wettest five days (Rx5day)
1943	61.5 mm (2.4 in)
1944	85.8 mm (3.4 in)
1945	47.1 mm (1.9 in)
1946	78.7 mm (3.1 in)
1947	58.3 mm (2.3 in)
1948	66.4 mm (2.6 in)
1949	106.7 mm (4.2 in)
1950	77.2 mm (3.0 in)
1951	93.0 mm (3.7 in)
1952	80.6 mm (3.2 in)
1953	58.4 mm (2.3 in)
1954	81.3 mm (3.2 in)
1955	123.7 mm (4.9 in)
1956	108.9 mm (4.3 in)
1957	88.4 mm (3.5 in)
1958	88.4 mm (3.5 in)
1959	149.8 mm (5.9 in)
1960	135.6 mm (5.3 in)
1961	108.9 mm (4.3 in)
1962	121.0 mm (4.8 in)
1963	110.4 mm (4.3 in)
1964	79.0 mm (3.1 in)
1965	89.1 mm (3.5 in)
1966	127.5 mm (5.0 in)
1967	195.4 mm (7.7 in)
1968	117.1 mm (4.6 in)
1969	129.3 mm (5.1 in)
1970	3.3 mm (0.13 in)
1971	79.3 mm (3.1 in)
1972	82.5 mm (3.2 in)
1973	150.7 mm (5.9 in)
1974	210.1 mm (8.3 in)
1975	64.6 mm (2.5 in)
1976	123.0 mm (4.8 in)
1977	131.0 mm (5.2 in)
1978	9.9 mm (0.39 in)
1980	4.6 mm (0.18 in)
1981	129.3 mm (5.1 in)
1982	72.9 mm (2.9 in)
1983	123.8 mm (4.9 in)

Longest dry spell (CDD)

The longest dry spell of the year at Tepacaltepec, 1943 to 1983. The record is 167 days in 1957, marked on the chart; the median year is 90 days.

Longest dry spell (CDD) at Tepacaltepec by year
Year	Longest dry spell (CDD)
1943	100 days
1944	133 days
1945	90 days
1946	129 days
1947	91 days
1948	104 days
1949	148 days
1950	136 days
1951	76 days
1952	131 days
1953	151 days
1954	77 days
1955	89 days
1956	75 days
1957	167 days
1958	70 days
1959	104 days
1960	83 days
1961	62 days
1962	106 days
1963	103 days
1964	156 days
1965	72 days
1966	68 days
1967	127 days
1968	73 days
1969	87 days
1970	90 days
1971	67 days
1972	79 days
1973	92 days
1974	71 days
1975	131 days
1976	155 days
1977	108 days
1978	18 days
1980	32 days
1981	59 days
1982	80 days
1983	72 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

32 years, 1943 to 1983

A day with at least 59.0 mm (2.3 in) of rain is expected about once in 2 years. A day with at least 119.3 mm (4.7 in) of rain is expected about once in 100 years.

Rainfall return levels at Tepacaltepec: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	59.0 mm (2.3 in)
5 years	76.3 mm (3.0 in)
10 years	87.3 mm (3.4 in)
25 years	100.6 mm (4.0 in)
50 years	110.2 mm (4.3 in)	Longer than the 32 years of record
100 years	119.3 mm (4.7 in)	Longer than the 32 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, 32 years of values from 1943 to 1983.

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: 110.0 mm (4.3 in) in 1981; 89.9 mm (3.5 in) in 1955; 89.9 mm (3.5 in) in 1959.

Download the Data

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