Tepeyahualco Weather Records (MXN00021244)

Record envelope, standing records and threshold days for Tepeyahualco (MXN00021244), Mexico, with 66 years of record.

Key Facts for Tepeyahualco

Tepeyahualco (MXN00021244) is a weather station in Mexico at 19.48 latitude and -97.48 longitude, 2,486 m (8,156 ft) above sea level.
The station reports from 1944 to 2009, 66 years of record.
1,464 records set at Tepeyahualco still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Tepeyahualco set a daily record precipitation of 2.8 mm (0.11 in) on 17 December 2009.

About the Station

Location: Mexico, 19.48 latitude, -97.48 longitude.
Elevation: 2,486 m (8,156 ft).
Period of record: 1944 to 2009, 66 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 Tepeyahualco. 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 Tepeyahualco, 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)	-14.4 C (6.1 F)	n/a	n/a
Feb	31.7 C (89.1 F)	-14.4 C (6.1 F)	n/a	n/a
Mar	35.0 C (95.0 F)	-10.0 C (14.0 F)	n/a	n/a
Apr	35.0 C (95.0 F)	-3.3 C (26.1 F)	n/a	n/a
May	33.9 C (93.0 F)	-6.1 C (21.0 F)	n/a	n/a
Jun	37.8 C (100.0 F)	-1.1 C (30.0 F)	n/a	n/a
Jul	33.9 C (93.0 F)	0.6 C (33.1 F)	n/a	n/a
Aug	31.1 C (88.0 F)	0.6 C (33.1 F)	n/a	n/a
Sep	30.6 C (87.1 F)	-5.0 C (23.0 F)	n/a	n/a
Oct	31.7 C (89.1 F)	-5.0 C (23.0 F)	n/a	n/a
Nov	30.0 C (86.0 F)	-13.3 C (8.1 F)	n/a	n/a
Dec	29.4 C (84.9 F)	-10.0 C (14.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Tepeyahualco still stand. 1946 holds the most, with 119.

Standing records at Tepeyahualco by the year they were set
Year set	Standing records
1944	64
1945	114
1946	119
1947	83
1948	80
1949	63
1950	26
1967	31
1968	35
1969	39
1970	60
1971	39
1972	28
1973	46
1974	46
1975	44
1976	39
1977	33
1978	32
1979	38
1980	33
1981	30
1982	35
1983	32
1984	46
1985	20
1986	48
1987	50
1988	20
1989	27
1990	4
2007	28
2008	12
2009	20

Wettest Day of Each Month

Jun: 71.6 mm (2.8 in)

The wettest day on record for each calendar month at Tepeyahualco. The most was 71.6 mm (2.8 in) on 12 June 1944.

Record daily precipitation for each month at Tepeyahualco
Month	Record daily precipitation (mm)	Date
Jan	22.9 mm (0.9 in)	10 January 1984
Feb	17.3 mm (0.7 in)	11 February 1983
Mar	31.0 mm (1.2 in)	21 March 1984
Apr	41.4 mm (1.6 in)	13 April 1974
May	69.9 mm (2.8 in)	31 May 2009
Jun	71.6 mm (2.8 in)	12 June 1944
Jul	54.9 mm (2.2 in)	16 July 1949
Aug	60.5 mm (2.4 in)	22 August 2007
Sep	59.9 mm (2.4 in)	14 September 2009
Oct	48.8 mm (1.9 in)	7 October 1976
Nov	21.8 mm (0.9 in)	29 November 1967
Dec	15.0 mm (0.6 in)	7 December 1989

Period of Record Coverage

1944 to 2009

34 years of record at Tepeyahualco, 1944 to 2009. 7 years have data for under 90 percent of days and are left out of rankings: 1944, 1950, 1967, 1972, 1988, 1989, 1990.

Days with data per year at Tepeyahualco
Year	Days with data	Share of year	Complete
1944	274	75%	No
1945	365	100%	Yes
1946	365	100%	Yes
1947	365	100%	Yes
1948	366	100%	Yes
1949	365	100%	Yes
1950	151	41%	No
1967	304	83%	No
1968	365	100%	Yes
1969	362	99%	Yes
1970	363	99%	Yes
1971	365	100%	Yes
1972	213	58%	No
1973	365	100%	Yes
1974	364	100%	Yes
1975	365	100%	Yes
1976	366	100%	Yes
1977	363	99%	Yes
1978	365	100%	Yes
1979	364	100%	Yes
1980	366	100%	Yes
1981	364	100%	Yes
1982	334	92%	Yes
1983	334	92%	Yes
1984	366	100%	Yes
1985	365	100%	Yes
1986	365	100%	Yes
1987	365	100%	Yes
1988	274	75%	No
1989	271	74%	No
1990	89	24%	No
2007	364	100%	Yes
2008	364	99%	Yes
2009	363	99%	Yes

Latest Records

Latest records at Tepeyahualco
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 December 2009	Tepeyahualco, MX	daily rain	2.8 mm (0.11 in)	2.8 mm (0.11 in)	64 years	20 of 100 (Routine)
13 December 2009	Tepeyahualco, MX	daily high max (Tie)	26.7 C (80.1 F)	tie	64 years	6 of 100 (Routine)
12 December 2009	Tepeyahualco, MX	daily high max	26.7 C (80.1 F)	1.1 C (2.0 F)	64 years	28 of 100 (Routine)
11 December 2009	Tepeyahualco, MX	daily high max (Tie)	26.7 C (80.1 F)	tie	24 years	3 of 100 (Routine)
10 December 2009	Tepeyahualco, MX	daily high max	27.8 C (82.0 F)	1.1 C (2.0 F)	64 years	28 of 100 (Routine)
7 December 2009	Tepeyahualco, MX	daily high max	26.7 C (80.1 F)	0.6 C (1.1 F)	60 years	25 of 100 (Routine)
24 November 2009	Tepeyahualco, MX	daily rain	3.8 mm (0.15 in)	3.0 mm (0.12 in)	62 years	20 of 100 (Routine)
24 November 2009	Tepeyahualco, MX	daily high max (Tie)	26.7 C (80.1 F)	tie	62 years	6 of 100 (Routine)
17 November 2009	Tepeyahualco, MX	daily low max (Tie)	20.6 C (69.1 F)	tie	60 years	6 of 100 (Routine)
29 October 2009	Tepeyahualco, MX	daily high min (Tie)	10.0 C (50.0 F)	tie	60 years	6 of 100 (Routine)
28 October 2009	Tepeyahualco, MX	daily high min (Tie)	11.7 C (53.1 F)	tie	62 years	6 of 100 (Routine)
26 October 2009	Tepeyahualco, MX	daily high min (Tie)	10.0 C (50.0 F)	tie	62 years	6 of 100 (Routine)
25 October 2009	Tepeyahualco, MX	daily high min	11.7 C (53.1 F)	1.1 C (2.0 F)	62 years	27 of 100 (Routine)
23 October 2009	Tepeyahualco, MX	daily high min (Tie)	10.0 C (50.0 F)	tie	62 years	6 of 100 (Routine)
13 October 2009	Tepeyahualco, MX	daily high max (Tie)	26.7 C (80.1 F)	tie	24 years	3 of 100 (Routine)
11 October 2009	Tepeyahualco, MX	daily high min (Tie)	11.7 C (53.1 F)	tie	64 years	6 of 100 (Routine)
7 October 2009	Tepeyahualco, MX	daily high max	27.8 C (82.0 F)	0.6 C (1.1 F)	62 years	25 of 100 (Routine)
6 October 2009	Tepeyahualco, MX	daily high max	27.8 C (82.0 F)	0.6 C (1.1 F)	40 years	19 of 100 (Routine)
3 October 2009	Tepeyahualco, MX	daily high max	27.8 C (82.0 F)	1.1 C (2.0 F)	64 years	28 of 100 (Routine)
2 October 2009	Tepeyahualco, MX	daily high max	27.8 C (82.0 F)	1.1 C (2.0 F)	40 years	21 of 100 (Routine)

Climate Trend

25 complete years, 1945 to 2009

One stripe for each of 25 complete years at Tepeyahualco, 1945 to 2009. Blue stripes are years cooler than the station's own mean of 14.9 C (58.8 F); red stripes are warmer. The coolest year was 1984, at 13.2 C (55.8 F), and the warmest was 1945, at 17.5 C (63.6 F). The strongest colour marks a difference of 2.7 C (4.9 F).

Annual mean temperature at Tepeyahualco as warming stripes, 1945 to 2009
Year	Annual mean temperature	Difference from the station mean
1945	17.5 C	+2.63 C
1946	17.5 C	+2.59 C
1947	17.1 C	+2.22 C
1948	17.5 C	+2.60 C
1949	17.2 C	+2.27 C
1968	14.4 C	-0.49 C
1969	15.1 C	+0.23 C
1970	14.5 C	-0.40 C
1971	14.6 C	-0.28 C
1973	14.5 C	-0.38 C
1974	13.6 C	-1.35 C
1975	13.9 C	-1.02 C
1976	13.7 C	-1.23 C
1977	14.1 C	-0.86 C
1978	14.2 C	-0.74 C
1979	14.0 C	-0.94 C
1980	13.9 C	-1.04 C
1981	13.8 C	-1.14 C
1984	13.2 C	-1.68 C
1985	13.6 C	-1.27 C
1986	13.3 C	-1.58 C
1987	13.5 C	-1.45 C
2007	16.0 C	+1.13 C
2008	15.9 C	+0.98 C
2009	16.2 C	+1.32 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

1944 to 2009

Yearly extremes at Tepeyahualco: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	37.8 C (100.0 F)	1989	31.7 C (89.1 F)	34
Coldest night (TNn)	-14.4 C (6.1 F)	1973	-6.1 C (21.0 F)	34
Wettest day (Rx1day)	71.6 mm (2.8 in)	1944	39.2 mm (1.5 in)	34
Wettest five days (Rx5day)	124.2 mm (4.9 in)	2009	68.9 mm (2.7 in)	34
Longest dry spell (CDD)	101 days	1973	58 days	34

Hottest day (TXx)

The hottest day of the year at Tepeyahualco, 1944 to 2009. The record is 37.8 C (100.0 F) in 1989, marked on the chart; the median year is 31.7 C (89.1 F).

Hottest day (TXx) at Tepeyahualco by year
Year	Hottest day (TXx)
1944	33.9 C (93.0 F)
1945	34.4 C (93.9 F)
1946	33.9 C (93.0 F)
1947	35.0 C (95.0 F)
1948	33.9 C (93.0 F)
1949	31.1 C (88.0 F)
1950	30.0 C (86.0 F)
1967	31.1 C (88.0 F)
1968	31.7 C (89.1 F)
1969	32.8 C (91.0 F)
1970	33.9 C (93.0 F)
1971	35.0 C (95.0 F)
1972	32.8 C (91.0 F)
1973	31.7 C (89.1 F)
1974	30.0 C (86.0 F)
1975	32.8 C (91.0 F)
1976	30.0 C (86.0 F)
1977	30.6 C (87.1 F)
1978	35.0 C (95.0 F)
1979	31.7 C (89.1 F)
1980	35.0 C (95.0 F)
1981	30.6 C (87.1 F)
1982	30.6 C (87.1 F)
1983	31.7 C (89.1 F)
1984	31.7 C (89.1 F)
1985	30.6 C (87.1 F)
1986	30.6 C (87.1 F)
1987	28.9 C (84.0 F)
1988	31.7 C (89.1 F)
1989	37.8 C (100.0 F)
1990	30.6 C (87.1 F)
2007	33.9 C (93.0 F)
2008	31.7 C (89.1 F)
2009	30.6 C (87.1 F)

Coldest night (TNn)

The coldest night of the year at Tepeyahualco, 1944 to 2009. The record is -14.4 C (6.1 F) in 1973, marked on the chart; the median year is -6.1 C (21.0 F).

Coldest night (TNn) at Tepeyahualco by year
Year	Coldest night (TNn)
1944	-5.0 C (23.0 F)
1945	-1.1 C (30.0 F)
1946	-3.9 C (25.0 F)
1947	-5.0 C (23.0 F)
1948	-1.7 C (28.9 F)
1949	0.0 C (32.0 F)
1950	-3.9 C (25.0 F)
1967	-5.0 C (23.0 F)
1968	-6.1 C (21.0 F)
1969	-6.1 C (21.0 F)
1970	-13.3 C (8.1 F)
1971	-6.1 C (21.0 F)
1972	-8.9 C (16.0 F)
1973	-14.4 C (6.1 F)
1974	-12.2 C (10.0 F)
1975	-11.1 C (12.0 F)
1976	-14.4 C (6.1 F)
1977	-5.0 C (23.0 F)
1978	-5.0 C (23.0 F)
1979	-6.7 C (19.9 F)
1980	-9.4 C (15.1 F)
1981	-7.2 C (19.0 F)
1982	-10.0 C (14.0 F)
1983	-7.2 C (19.0 F)
1984	-9.4 C (15.1 F)
1985	-6.1 C (21.0 F)
1986	-9.4 C (15.1 F)
1987	-14.4 C (6.1 F)
1988	-9.4 C (15.1 F)
1989	-8.3 C (17.1 F)
1990	-2.2 C (28.0 F)
2007	-2.2 C (28.0 F)
2008	-2.2 C (28.0 F)
2009	-3.3 C (26.1 F)

Wettest day (Rx1day)

The wettest day of the year at Tepeyahualco, 1944 to 2009. The record is 71.6 mm (2.8 in) in 1944, marked on the chart; the median year is 39.2 mm (1.5 in).

Wettest day (Rx1day) at Tepeyahualco by year
Year	Wettest day (Rx1day)
1944	71.6 mm (2.8 in)
1945	39.4 mm (1.6 in)
1946	43.2 mm (1.7 in)
1947	34.8 mm (1.4 in)
1948	25.1 mm (1.0 in)
1949	54.9 mm (2.2 in)
1950	3.6 mm (0.14 in)
1967	39.4 mm (1.6 in)
1968	32.8 mm (1.3 in)
1969	26.9 mm (1.1 in)
1970	31.8 mm (1.3 in)
1971	40.9 mm (1.6 in)
1972	50.5 mm (2.0 in)
1973	39.9 mm (1.6 in)
1974	48.3 mm (1.9 in)
1975	36.3 mm (1.4 in)
1976	48.8 mm (1.9 in)
1977	39.9 mm (1.6 in)
1978	28.4 mm (1.1 in)
1979	35.8 mm (1.4 in)
1980	38.9 mm (1.5 in)
1981	59.9 mm (2.4 in)
1982	30.5 mm (1.2 in)
1983	33.8 mm (1.3 in)
1984	46.0 mm (1.8 in)
1985	31.0 mm (1.2 in)
1986	39.9 mm (1.6 in)
1987	50.8 mm (2.0 in)
1988	31.8 mm (1.3 in)
1989	15.0 mm (0.6 in)
1990	20.3 mm (0.8 in)
2007	60.5 mm (2.4 in)
2008	27.9 mm (1.1 in)
2009	69.9 mm (2.8 in)

Wettest five days (Rx5day)

The wettest five days of the year at Tepeyahualco, 1944 to 2009. The record is 124.2 mm (4.9 in) in 2009, marked on the chart; the median year is 68.9 mm (2.7 in).

Wettest five days (Rx5day) at Tepeyahualco by year
Year	Wettest five days (Rx5day)
1944	122.0 mm (4.8 in)
1945	74.8 mm (2.9 in)
1946	94.5 mm (3.7 in)
1947	74.5 mm (2.9 in)
1948	58.1 mm (2.3 in)
1949	66.6 mm (2.6 in)
1950	3.9 mm (0.15 in)
1967	65.4 mm (2.6 in)
1968	75.8 mm (3.0 in)
1969	51.5 mm (2.0 in)
1970	45.5 mm (1.8 in)
1971	56.7 mm (2.2 in)
1972	101.5 mm (4.0 in)
1973	65.1 mm (2.6 in)
1974	80.9 mm (3.2 in)
1975	87.9 mm (3.5 in)
1976	71.2 mm (2.8 in)
1977	49.0 mm (1.9 in)
1978	115.3 mm (4.5 in)
1979	62.8 mm (2.5 in)
1980	59.3 mm (2.3 in)
1981	81.7 mm (3.2 in)
1982	64.9 mm (2.6 in)
1983	73.4 mm (2.9 in)
1984	102.5 mm (4.0 in)
1985	43.2 mm (1.7 in)
1986	60.0 mm (2.4 in)
1987	109.6 mm (4.3 in)
1988	102.1 mm (4.0 in)
1989	15.0 mm (0.6 in)
1990	28.0 mm (1.1 in)
2007	90.2 mm (3.6 in)
2008	51.5 mm (2.0 in)
2009	124.2 mm (4.9 in)

Longest dry spell (CDD)

The longest dry spell of the year at Tepeyahualco, 1944 to 2009. The record is 101 days in 1973, marked on the chart; the median year is 58 days.

Longest dry spell (CDD) at Tepeyahualco by year
Year	Longest dry spell (CDD)
1944	68 days
1945	66 days
1946	53 days
1947	86 days
1948	55 days
1949	85 days
1950	89 days
1967	32 days
1968	56 days
1969	79 days
1970	82 days
1971	82 days
1972	37 days
1973	101 days
1974	67 days
1975	81 days
1976	57 days
1977	49 days
1978	53 days
1979	41 days
1980	71 days
1981	42 days
1982	44 days
1983	52 days
1984	40 days
1985	54 days
1986	94 days
1987	61 days
1988	38 days
1989	80 days
1990	30 days
2007	33 days
2008	74 days
2009	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.

Frost Dates and Growing Season

24 years with a frost

Across 24 years with a frost, the median last spring frost at Tepeyahualco falls on 22 March and the median first autumn frost on 7 November, which leaves a median of 224 days between them.

Frost dates and growing season at Tepeyahualco
Measure	Median, all years	Earliest period	Recent period (1945 to 2008)	Recent against earliest	Fitted trend
Last spring frost	22 March	n/a	22 March	n/a	n/a
First autumn frost	7 November	n/a	7 November	n/a	n/a
Growing days	224 days	n/a	224 days	n/a	n/a

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Download the Data

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