Acatepec Weather Records (MXN00021002)

Record envelope, standing records and threshold days for Acatepec (MXN00021002), Mexico, with 56 years of record.

Key Facts for Acatepec

Acatepec (MXN00021002) is a weather station in Mexico at 18.22 latitude and -97.57 longitude, 2,053 m (6,735 ft) above sea level.
The station reports from 1954 to 2009, 56 years of record.
1,464 records set at Acatepec still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Acatepec set a daily record precipitation of 6.1 mm (0.24 in) on 16 December 2009.

About the Station

Location: Mexico, 18.22 latitude, -97.57 longitude.
Elevation: 2,053 m (6,735 ft).
Period of record: 1954 to 2009, 56 years.
Eligible elements: 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 Acatepec. 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 Acatepec, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	27.8 C (82.0 F)	0.0 C (32.0 F)	n/a	n/a
Feb	33.9 C (93.0 F)	0.0 C (32.0 F)	n/a	n/a
Mar	32.8 C (91.0 F)	0.0 C (32.0 F)	n/a	n/a
Apr	33.9 C (93.0 F)	3.9 C (39.0 F)	n/a	n/a
May	35.0 C (95.0 F)	5.6 C (42.1 F)	n/a	n/a
Jun	32.8 C (91.0 F)	6.7 C (44.1 F)	n/a	n/a
Jul	28.9 C (84.0 F)	6.7 C (44.1 F)	n/a	n/a
Aug	28.9 C (84.0 F)	6.7 C (44.1 F)	n/a	n/a
Sep	27.8 C (82.0 F)	6.7 C (44.1 F)	n/a	n/a
Oct	28.9 C (84.0 F)	2.8 C (37.0 F)	n/a	n/a
Nov	27.8 C (82.0 F)	0.6 C (33.1 F)	n/a	n/a
Dec	28.9 C (84.0 F)	0.0 C (32.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Acatepec still stand. 1977 holds the most, with 120.

Standing records at Acatepec by the year they were set
Year set	Standing records
1974	35
1975	62
1976	65
1977	120
1978	107
1979	33
1980	69
1981	50
1982	45
1983	58
1984	42
1985	4
1987	18
1988	44
1989	55
1990	38
1991	75
1992	40
1993	46
1994	39
1995	31
1996	66
1997	49
1998	49
1999	37
2000	23
2001	28
2002	28
2007	36
2008	51
2009	21

Wettest Day of Each Month

Jun: 90.4 mm (3.6 in)

The wettest day on record for each calendar month at Acatepec. The most was 90.4 mm (3.6 in) on 12 June 1972.

Record daily precipitation for each month at Acatepec
Month	Record daily precipitation (mm)	Date
Jan	29.2 mm (1.1 in)	15 January 1968
Feb	31.8 mm (1.3 in)	23 February 1957
Mar	37.8 mm (1.5 in)	13 March 1983
Apr	40.9 mm (1.6 in)	10 April 1980
May	73.4 mm (2.9 in)	26 May 1981
Jun	90.4 mm (3.6 in)	12 June 1972
Jul	89.2 mm (3.5 in)	17 July 1974
Aug	74.9 mm (2.9 in)	9 August 1963
Sep	70.9 mm (2.8 in)	25 September 1974
Oct	57.9 mm (2.3 in)	2 October 1971
Nov	25.4 mm (1.0 in)	10 November 1997
Dec	21.8 mm (0.9 in)	12 December 1977

Period of Record Coverage

1974 to 2009

31 years of record at Acatepec, 1974 to 2009. 8 years have data for under 90 percent of days and are left out of rankings: 1974, 1979, 1985, 1987, 1988, 1989, 1995, 2000.

Days with data per year at Acatepec
Year	Days with data	Share of year	Complete
1974	157	43%	No
1975	365	100%	Yes
1976	366	100%	Yes
1977	365	100%	Yes
1978	364	100%	Yes
1979	181	50%	No
1980	352	96%	Yes
1981	357	98%	Yes
1982	344	94%	Yes
1983	365	100%	Yes
1984	366	100%	Yes
1985	28	8%	No
1987	141	39%	No
1988	274	75%	No
1989	303	83%	No
1990	364	100%	Yes
1991	365	100%	Yes
1992	366	100%	Yes
1993	365	100%	Yes
1994	365	100%	Yes
1995	243	67%	No
1996	335	92%	Yes
1997	365	100%	Yes
1998	364	100%	Yes
1999	364	100%	Yes
2000	274	75%	No
2001	332	91%	Yes
2002	334	92%	Yes
2007	360	99%	Yes
2008	357	98%	Yes
2009	331	91%	Yes

Latest Records

Latest records at Acatepec
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
16 December 2009	Acatepec, MX	daily rain	6.1 mm (0.24 in)	6.1 mm (0.24 in)	55 years	20 of 100 (Routine)
16 September 2009	Acatepec, MX	daily rain (Tie)	19.8 mm (0.8 in)	tie	11 years	2 of 100 (Routine)
15 September 2009	Acatepec, MX	daily rain	52.6 mm (2.1 in)	32.8 mm (1.3 in)	24 years	37 of 100 (Notable)
13 September 2009	Acatepec, MX	daily rain	22.6 mm (0.9 in)	8.1 mm (0.32 in)	12 years	14 of 100 (Routine)
10 July 2009	Acatepec, MX	daily rain	16.3 mm (0.6 in)	4.4 mm (0.17 in)	30 years	17 of 100 (Routine)
24 June 2009	Acatepec, MX	daily rain	33.5 mm (1.3 in)	11.7 mm (0.5 in)	20 years	18 of 100 (Routine)
15 April 2009	Acatepec, MX	daily rain	4.1 mm (0.16 in)	1.3 mm (0.05 in)	12 years	9 of 100 (Routine)
16 August 2008	Acatepec, MX	daily rain	15.7 mm (0.6 in)	0.2 mm (0.01 in)	40 years	17 of 100 (Routine)
29 July 2008	Acatepec, MX	daily rain	38.1 mm (1.5 in)	18.3 mm (0.7 in)	13 years	22 of 100 (Routine)
11 June 2008	Acatepec, MX	daily rain	61.2 mm (2.4 in)	42.9 mm (1.7 in)	40 years	46 of 100 (Notable)
29 April 2008	Acatepec, MX	daily rain	6.1 mm (0.24 in)	3.8 mm (0.15 in)	15 years	13 of 100 (Routine)
22 October 2007	Acatepec, MX	daily rain	6.6 mm (0.26 in)	3.3 mm (0.13 in)	29 years	16 of 100 (Routine)
19 October 2007	Acatepec, MX	daily rain	29.7 mm (1.2 in)	20.3 mm (0.8 in)	41 years	36 of 100 (Notable)
1 September 2007	Acatepec, MX	daily rain	41.1 mm (1.6 in)	12.4 mm (0.5 in)	52 years	29 of 100 (Routine)
16 June 2007	Acatepec, MX	daily rain	30.5 mm (1.2 in)	3.1 mm (0.12 in)	32 years	16 of 100 (Routine)
24 April 2007	Acatepec, MX	daily rain	35.6 mm (1.4 in)	24.7 mm (1.0 in)	16 years	39 of 100 (Notable)
22 April 2007	Acatepec, MX	daily rain	13.0 mm (0.5 in)	1.6 mm (0.06 in)	28 years	14 of 100 (Routine)
21 April 2007	Acatepec, MX	daily rain	1.8 mm (0.07 in)	0.8 mm (0.03 in)	13 years	9 of 100 (Routine)
1 April 2007	Acatepec, MX	daily rain	15.7 mm (0.6 in)	9.3 mm (0.37 in)	40 years	20 of 100 (Routine)
4 February 2007	Acatepec, MX	daily rain	6.9 mm (0.27 in)	5.6 mm (0.22 in)	23 years	20 of 100 (Routine)

Climate Trend

17 complete years, 1975 to 2008

One stripe for each of 17 complete years at Acatepec, 1975 to 2008. Blue stripes are years cooler than the station's own mean of 16.2 C (61.1 F); red stripes are warmer. The coolest year was 1978, at 15.0 C (59.1 F), and the warmest was 1975, at 17.1 C (62.7 F). The strongest colour marks a difference of 1.2 C (2.2 F).

Annual mean temperature at Acatepec as warming stripes, 1975 to 2008
Year	Annual mean temperature	Difference from the station mean
1975	17.1 C	+0.87 C
1976	16.6 C	+0.40 C
1977	15.9 C	-0.32 C
1978	15.0 C	-1.16 C
1981	16.1 C	-0.09 C
1983	16.9 C	+0.74 C
1984	16.4 C	+0.18 C
1990	16.5 C	+0.28 C
1991	16.5 C	+0.28 C
1992	15.9 C	-0.31 C
1993	16.1 C	-0.07 C
1994	16.0 C	-0.18 C
1997	16.1 C	-0.14 C
1998	16.6 C	+0.36 C
1999	15.5 C	-0.68 C
2007	16.2 C	+0.01 C
2008	16.0 C	-0.21 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

1954 to 2009

Yearly extremes at Acatepec: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	35.0 C (95.0 F)	1998	31.7 C (89.1 F)	31
Coldest night (TNn)	0.0 C (32.0 F)	1976	0.6 C (33.1 F)	31
Wettest day (Rx1day)	90.4 mm (3.6 in)	1972	51.2 mm (2.0 in)	50
Wettest five days (Rx5day)	220.5 mm (8.7 in)	1980	96.3 mm (3.8 in)	50
Longest dry spell (CDD)	133 days	1970	65 days	50

Hottest day (TXx)

The hottest day of the year at Acatepec, 1954 to 2009. The record is 35.0 C (95.0 F) in 1998, marked on the chart; the median year is 31.7 C (89.1 F).

Hottest day (TXx) at Acatepec by year
Year	Hottest day (TXx)
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1963	n/a
1964	n/a
1965	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	n/a
1971	n/a
1972	n/a
1973	n/a
1974	25.6 C (78.1 F)
1975	31.7 C (89.1 F)
1976	30.0 C (86.0 F)
1977	30.6 C (87.1 F)
1978	30.0 C (86.0 F)
1979	28.9 C (84.0 F)
1980	31.7 C (89.1 F)
1981	30.6 C (87.1 F)
1982	32.8 C (91.0 F)
1983	33.9 C (93.0 F)
1984	33.3 C (91.9 F)
1985	26.7 C (80.1 F)
1987	30.6 C (87.1 F)
1988	33.9 C (93.0 F)
1989	31.7 C (89.1 F)
1990	32.8 C (91.0 F)
1991	32.8 C (91.0 F)
1992	28.9 C (84.0 F)
1993	30.6 C (87.1 F)
1994	31.7 C (89.1 F)
1995	32.8 C (91.0 F)
1996	30.0 C (86.0 F)
1997	30.0 C (86.0 F)
1998	35.0 C (95.0 F)
1999	30.6 C (87.1 F)
2000	30.6 C (87.1 F)
2001	32.8 C (91.0 F)
2002	31.7 C (89.1 F)
2007	31.7 C (89.1 F)
2008	31.7 C (89.1 F)
2009	32.8 C (91.0 F)

Coldest night (TNn)

The coldest night of the year at Acatepec, 1954 to 2009. The record is 0.0 C (32.0 F) in 1976, marked on the chart; the median year is 0.6 C (33.1 F).

Coldest night (TNn) at Acatepec by year
Year	Coldest night (TNn)
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1963	n/a
1964	n/a
1965	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	n/a
1971	n/a
1972	n/a
1973	n/a
1974	3.9 C (39.0 F)
1975	2.8 C (37.0 F)
1976	0.0 C (32.0 F)
1977	1.7 C (35.1 F)
1978	1.7 C (35.1 F)
1979	0.0 C (32.0 F)
1980	0.6 C (33.1 F)
1981	0.6 C (33.1 F)
1982	4.4 C (39.9 F)
1983	0.6 C (33.1 F)
1984	0.0 C (32.0 F)
1985	1.7 C (35.1 F)
1987	5.6 C (42.1 F)
1988	0.0 C (32.0 F)
1989	0.0 C (32.0 F)
1990	0.6 C (33.1 F)
1991	0.6 C (33.1 F)
1992	0.0 C (32.0 F)
1993	0.0 C (32.0 F)
1994	0.0 C (32.0 F)
1995	0.6 C (33.1 F)
1996	0.0 C (32.0 F)
1997	0.0 C (32.0 F)
1998	0.0 C (32.0 F)
1999	0.0 C (32.0 F)
2000	0.0 C (32.0 F)
2001	0.6 C (33.1 F)
2002	0.6 C (33.1 F)
2007	1.7 C (35.1 F)
2008	0.6 C (33.1 F)
2009	0.6 C (33.1 F)

Wettest day (Rx1day)

The wettest day of the year at Acatepec, 1954 to 2009. The record is 90.4 mm (3.6 in) in 1972, marked on the chart; the median year is 51.2 mm (2.0 in).

Wettest day (Rx1day) at Acatepec by year
Year	Wettest day (Rx1day)
1954	4.6 mm (0.18 in)
1955	73.4 mm (2.9 in)
1956	42.9 mm (1.7 in)
1957	37.8 mm (1.5 in)
1958	52.3 mm (2.1 in)
1959	52.8 mm (2.1 in)
1960	45.0 mm (1.8 in)
1961	75.9 mm (3.0 in)
1963	74.9 mm (2.9 in)
1964	41.9 mm (1.6 in)
1965	45.7 mm (1.8 in)
1966	50.0 mm (2.0 in)
1967	52.3 mm (2.1 in)
1968	49.3 mm (1.9 in)
1969	59.2 mm (2.3 in)
1970	80.8 mm (3.2 in)
1971	65.8 mm (2.6 in)
1972	90.4 mm (3.6 in)
1973	49.0 mm (1.9 in)
1974	89.2 mm (3.5 in)
1975	53.8 mm (2.1 in)
1976	57.7 mm (2.3 in)
1977	47.8 mm (1.9 in)
1978	69.6 mm (2.7 in)
1979	55.4 mm (2.2 in)
1980	69.3 mm (2.7 in)
1981	73.4 mm (2.9 in)
1982	56.9 mm (2.2 in)
1983	42.9 mm (1.7 in)
1984	37.6 mm (1.5 in)
1985	0.0 mm (0.00 in)
1987	26.4 mm (1.0 in)
1988	43.7 mm (1.7 in)
1989	39.9 mm (1.6 in)
1990	45.5 mm (1.8 in)
1991	57.9 mm (2.3 in)
1992	39.4 mm (1.6 in)
1993	55.1 mm (2.2 in)
1994	71.4 mm (2.8 in)
1995	37.3 mm (1.5 in)
1996	44.2 mm (1.7 in)
1997	60.2 mm (2.4 in)
1998	64.8 mm (2.6 in)
1999	48.8 mm (1.9 in)
2000	30.7 mm (1.2 in)
2001	50.0 mm (2.0 in)
2002	49.3 mm (1.9 in)
2007	41.1 mm (1.6 in)
2008	61.2 mm (2.4 in)
2009	52.6 mm (2.1 in)

Wettest five days (Rx5day)

The wettest five days of the year at Acatepec, 1954 to 2009. The record is 220.5 mm (8.7 in) in 1980, marked on the chart; the median year is 96.3 mm (3.8 in).

Wettest five days (Rx5day) at Acatepec by year
Year	Wettest five days (Rx5day)
1954	4.6 mm (0.18 in)
1955	138.0 mm (5.4 in)
1956	73.4 mm (2.9 in)
1957	60.7 mm (2.4 in)
1958	82.1 mm (3.2 in)
1959	110.3 mm (4.3 in)
1960	106.5 mm (4.2 in)
1961	117.3 mm (4.6 in)
1963	152.6 mm (6.0 in)
1964	69.8 mm (2.7 in)
1965	95.7 mm (3.8 in)
1966	75.2 mm (3.0 in)
1967	83.0 mm (3.3 in)
1968	84.6 mm (3.3 in)
1969	107.7 mm (4.2 in)
1970	113.1 mm (4.5 in)
1971	119.7 mm (4.7 in)
1972	179.7 mm (7.1 in)
1973	143.1 mm (5.6 in)
1974	161.8 mm (6.4 in)
1975	128.7 mm (5.1 in)
1976	107.2 mm (4.2 in)
1977	79.1 mm (3.1 in)
1978	200.9 mm (7.9 in)
1979	101.6 mm (4.0 in)
1980	220.5 mm (8.7 in)
1981	118.2 mm (4.7 in)
1982	63.5 mm (2.5 in)
1983	61.5 mm (2.4 in)
1984	80.6 mm (3.2 in)
1985	0.0 mm (0.00 in)
1987	51.4 mm (2.0 in)
1988	86.6 mm (3.4 in)
1989	67.6 mm (2.7 in)
1990	49.3 mm (1.9 in)
1991	134.7 mm (5.3 in)
1992	67.8 mm (2.7 in)
1993	125.6 mm (4.9 in)
1994	93.3 mm (3.7 in)
1995	67.5 mm (2.7 in)
1996	59.2 mm (2.3 in)
1997	79.3 mm (3.1 in)
1998	96.9 mm (3.8 in)
1999	97.6 mm (3.8 in)
2000	71.6 mm (2.8 in)
2001	123.9 mm (4.9 in)
2002	113.5 mm (4.5 in)
2007	82.9 mm (3.3 in)
2008	106.7 mm (4.2 in)
2009	132.3 mm (5.2 in)

Longest dry spell (CDD)

The longest dry spell of the year at Acatepec, 1954 to 2009. The record is 133 days in 1970, marked on the chart; the median year is 65 days.

Longest dry spell (CDD) at Acatepec by year
Year	Longest dry spell (CDD)
1954	49 days
1955	86 days
1956	52 days
1957	52 days
1958	52 days
1959	61 days
1960	120 days
1961	70 days
1963	121 days
1964	37 days
1965	44 days
1966	74 days
1967	68 days
1968	51 days
1969	62 days
1970	133 days
1971	91 days
1972	51 days
1973	57 days
1974	77 days
1975	125 days
1976	54 days
1977	102 days
1978	42 days
1979	64 days
1980	59 days
1981	62 days
1982	80 days
1983	73 days
1984	98 days
1985	28 days
1987	38 days
1988	116 days
1989	81 days
1990	34 days
1991	54 days
1992	56 days
1993	47 days
1994	100 days
1995	58 days
1996	66 days
1997	78 days
1998	111 days
1999	82 days
2000	103 days
2001	59 days
2002	45 days
2007	70 days
2008	98 days
2009	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.

Rainfall Return Levels

40 years, 1955 to 2009

A day with at least 55.1 mm (2.2 in) of rain is expected about once in 2 years. A day with at least 102.1 mm (4.0 in) of rain is expected about once in 100 years.

Rainfall return levels at Acatepec: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	55.1 mm (2.2 in)
5 years	67.6 mm (2.7 in)
10 years	75.9 mm (3.0 in)
25 years	86.5 mm (3.4 in)
50 years	94.3 mm (3.7 in)	Longer than the 40 years of record
100 years	102.1 mm (4.0 in)	Longer than the 40 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, 40 years of values from 1955 to 2009.

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: 90.4 mm (3.6 in) in 1972; 89.2 mm (3.5 in) in 1974; 80.8 mm (3.2 in) in 1970.

Download the Data

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