Acatlan de Osorio (Dge) Weather Records (MXN00021004)

Record envelope, standing records and threshold days for Acatlan de Osorio (Dge) (MXN00021004), Mexico, with 41 years of record.

Key Facts for Acatlan de Osorio (Dge)

Acatlan de Osorio (Dge) (MXN00021004) is a weather station in Mexico at 18.28 latitude and -98.05 longitude, 1,427 m (4,681 ft) above sea level.
The station reports from 1952 to 1992, 41 years of record.
1,464 records set at Acatlan de Osorio (Dge) still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Acatlan de Osorio (Dge) set a daily record precipitation of 26.4 mm (1.0 in) on 9 October 1992.

About the Station

Location: Mexico, 18.28 latitude, -98.05 longitude.
Elevation: 1,427 m (4,681 ft).
Period of record: 1952 to 1992, 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 Acatlan de Osorio (Dge). 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 Acatlan de Osorio (Dge), with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	37.8 C (100.0 F)	0.6 C (33.1 F)	n/a	n/a
Feb	37.2 C (99.0 F)	2.8 C (37.0 F)	n/a	n/a
Mar	39.4 C (102.9 F)	5.0 C (41.0 F)	n/a	n/a
Apr	40.0 C (104.0 F)	6.1 C (43.0 F)	n/a	n/a
May	41.1 C (106.0 F)	8.9 C (48.0 F)	n/a	n/a
Jun	41.1 C (106.0 F)	11.7 C (53.1 F)	n/a	n/a
Jul	40.0 C (104.0 F)	8.9 C (48.0 F)	n/a	n/a
Aug	38.9 C (102.0 F)	10.6 C (51.1 F)	n/a	n/a
Sep	37.2 C (99.0 F)	10.0 C (50.0 F)	n/a	n/a
Oct	40.0 C (104.0 F)	8.9 C (48.0 F)	n/a	n/a
Nov	37.2 C (99.0 F)	3.9 C (39.0 F)	n/a	n/a
Dec	35.0 C (95.0 F)	0.0 C (32.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Acatlan de Osorio (Dge) still stand. 1969 holds the most, with 225.

Standing records at Acatlan de Osorio (Dge) by the year they were set
Year set	Standing records
1955	26
1956	31
1957	27
1958	33
1959	18
1960	25
1961	31
1962	29
1963	33
1964	17
1965	24
1966	34
1967	64
1968	66
1969	225
1970	137
1971	90
1972	25
1973	32
1974	23
1975	31
1976	30
1977	31
1978	48
1979	46
1980	41
1981	30
1982	19
1983	24
1984	22
1985	13
1987	34
1988	21
1989	22
1990	18
1991	28
1992	16

All-Time Record Progression

2 new records

2 all-time records were set at Acatlan de Osorio (Dge) between 1 June 1989 and 30 July 1989. Each dot is a new record.

When Acatlan de Osorio (Dge) set new all-time records
Date	Kind	Detail
1989-06-01	Record high minimum temperature	Record high minimum temperature 25.0 C (77.0 F)
1989-07-30	Record daily precipitation	Record daily precipitation 91.2 mm (3.6 in)

Wettest Day of Each Month

Jul: 91.2 mm (3.6 in)

The wettest day on record for each calendar month at Acatlan de Osorio (Dge). The most was 91.2 mm (3.6 in) on 30 July 1989.

Record daily precipitation for each month at Acatlan de Osorio (Dge)
Month	Record daily precipitation (mm)	Date
Jan	31.8 mm (1.3 in)	19 January 1958
Feb	17.3 mm (0.7 in)	23 February 1957
Mar	13.5 mm (0.5 in)	1 March 1982
Apr	47.5 mm (1.9 in)	26 April 1954
May	79.0 mm (3.1 in)	21 May 1968
Jun	90.4 mm (3.6 in)	14 June 1981
Jul	91.2 mm (3.6 in)	30 July 1989
Aug	79.8 mm (3.1 in)	19 August 1967
Sep	83.8 mm (3.3 in)	2 September 1962
Oct	45.2 mm (1.8 in)	18 October 1983
Nov	58.9 mm (2.3 in)	2 November 1958
Dec	19.8 mm (0.8 in)	3 December 1968

Period of Record Coverage

1955 to 1992

37 years of record at Acatlan de Osorio (Dge), 1955 to 1992. 11 years have data for under 90 percent of days and are left out of rankings: 1955, 1965, 1967, 1968, 1969, 1970, 1971, 1974 and others.

Days with data per year at Acatlan de Osorio (Dge)
Year	Days with data	Share of year	Complete
1955	275	75%	No
1956	336	92%	Yes
1957	365	100%	Yes
1958	365	100%	Yes
1959	365	100%	Yes
1960	365	100%	Yes
1961	365	100%	Yes
1962	365	100%	Yes
1963	365	100%	Yes
1964	335	92%	Yes
1965	245	67%	No
1966	365	100%	Yes
1967	303	83%	No
1968	85	23%	No
1969	214	59%	No
1970	248	68%	No
1971	243	67%	No
1972	366	100%	Yes
1973	365	100%	Yes
1974	323	88%	No
1975	334	92%	Yes
1976	366	100%	Yes
1977	365	100%	Yes
1978	364	100%	Yes
1979	336	92%	Yes
1980	366	100%	Yes
1981	365	100%	Yes
1982	353	97%	Yes
1983	365	100%	Yes
1984	366	100%	Yes
1985	243	67%	No
1987	364	100%	Yes
1988	366	100%	Yes
1989	365	100%	Yes
1990	212	58%	No
1991	334	92%	Yes
1992	304	83%	No

Latest Records

Latest records at Acatlan de Osorio (Dge)
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
9 October 1992	Acatlan de Osorio (Dge), MX	daily rain	26.4 mm (1.0 in)	17.0 mm (0.7 in)	10 years	23 of 100 (Routine)
17 September 1992	Acatlan de Osorio (Dge), MX	daily rain	27.4 mm (1.1 in)	8.6 mm (0.34 in)	21 years	16 of 100 (Routine)
3 September 1992	Acatlan de Osorio (Dge), MX	daily high max (Tie)	35.6 C (96.1 F)	tie	22 years	2 of 100 (Routine)
22 August 1992	Acatlan de Osorio (Dge), MX	daily rain	18.3 mm (0.7 in)	1.0 mm (0.04 in)	31 years	13 of 100 (Routine)
20 August 1992	Acatlan de Osorio (Dge), MX	daily rain	16.3 mm (0.6 in)	2.3 mm (0.09 in)	16 years	9 of 100 (Routine)
27 July 1992	Acatlan de Osorio (Dge), MX	daily rain	39.9 mm (1.6 in)	12.0 mm (0.5 in)	28 years	20 of 100 (Routine)
24 July 1992	Acatlan de Osorio (Dge), MX	daily low min	13.9 C (57.0 F)	0.5 C (0.9 F)	23 years	11 of 100 (Routine)
13 July 1992	Acatlan de Osorio (Dge), MX	daily low min (Tie)	13.9 C (57.0 F)	tie	23 years	2 of 100 (Routine)
5 July 1992	Acatlan de Osorio (Dge), MX	daily low max	26.1 C (79.0 F)	0.6 C (1.1 F)	18 years	10 of 100 (Routine)
6 June 1992	Acatlan de Osorio (Dge), MX	daily low max (Tie)	27.8 C (82.0 F)	tie	8 years	1 of 100 (Routine)
15 May 1992	Acatlan de Osorio (Dge), MX	daily low max (Tie)	30.0 C (86.0 F)	tie	33 years	3 of 100 (Routine)
14 May 1992	Acatlan de Osorio (Dge), MX	daily low max	30.0 C (86.0 F)	0.6 C (1.1 F)	33 years	14 of 100 (Routine)
13 May 1992	Acatlan de Osorio (Dge), MX	daily rain	21.3 mm (0.8 in)	18.0 mm (0.7 in)	35 years	20 of 100 (Routine)
10 May 1992	Acatlan de Osorio (Dge), MX	daily low max	30.0 C (86.0 F)	0.6 C (1.1 F)	13 years	8 of 100 (Routine)
24 March 1992	Acatlan de Osorio (Dge), MX	daily high max	37.8 C (100.0 F)	0.6 C (1.1 F)	1 year	5 of 100 (Routine)
23 March 1992	Acatlan de Osorio (Dge), MX	daily high max	38.9 C (102.0 F)	2.2 C (4.0 F)	30 years	21 of 100 (Routine)
23 March 1992	Acatlan de Osorio (Dge), MX	daily high min (Tie)	20.0 C (68.0 F)	tie	12 years	1 of 100 (Routine)
22 March 1992	Acatlan de Osorio (Dge), MX	daily high max	37.8 C (100.0 F)	1.1 C (2.0 F)	35 years	17 of 100 (Routine)
22 March 1992	Acatlan de Osorio (Dge), MX	daily high min	20.0 C (68.0 F)	0.6 C (1.1 F)	29 years	13 of 100 (Routine)
21 March 1992	Acatlan de Osorio (Dge), MX	daily high max	38.9 C (102.0 F)	1.1 C (2.0 F)	35 years	17 of 100 (Routine)

Climate Trend

20 complete years, 1957 to 1989

One stripe for each of 20 complete years at Acatlan de Osorio (Dge), 1957 to 1989. Blue stripes are years cooler than the station's own mean of 23.7 C (74.7 F); red stripes are warmer. The coolest year was 1966, at 23.0 C (73.4 F), and the warmest was 1962, at 24.5 C (76.1 F). The strongest colour marks a difference of 0.8 C (1.4 F).

Annual mean temperature at Acatlan de Osorio (Dge) as warming stripes, 1957 to 1989
Year	Annual mean temperature	Difference from the station mean
1957	24.3 C	+0.61 C
1958	24.0 C	+0.27 C
1959	23.9 C	+0.14 C
1960	24.2 C	+0.49 C
1961	24.2 C	+0.50 C
1962	24.5 C	+0.78 C
1963	23.9 C	+0.17 C
1966	23.0 C	-0.71 C
1972	23.3 C	-0.41 C
1973	23.1 C	-0.59 C
1976	23.3 C	-0.44 C
1977	23.7 C	+0.00 C
1978	24.1 C	+0.42 C
1980	23.9 C	+0.20 C
1981	23.2 C	-0.49 C
1983	23.7 C	-0.05 C
1984	23.1 C	-0.58 C
1987	23.5 C	-0.25 C
1988	23.8 C	+0.07 C
1989	23.5 C	-0.17 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

1952 to 1992

Yearly extremes at Acatlan de Osorio (Dge): the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	41.1 C (106.0 F)	1969	38.9 C (102.0 F)	37
Coldest night (TNn)	0.0 C (32.0 F)	1971	6.1 C (43.0 F)	37
Wettest day (Rx1day)	91.2 mm (3.6 in)	1989	52.1 mm (2.1 in)	39
Wettest five days (Rx5day)	165.2 mm (6.5 in)	1965	96.2 mm (3.8 in)	39
Longest dry spell (CDD)	151 days	1991	74 days	39

Hottest day (TXx)

The hottest day of the year at Acatlan de Osorio (Dge), 1952 to 1992. The record is 41.1 C (106.0 F) in 1969, marked on the chart; the median year is 38.9 C (102.0 F).

Hottest day (TXx) at Acatlan de Osorio (Dge) by year
Year	Hottest day (TXx)
1952	n/a
1954	n/a
1955	40.0 C (104.0 F)
1956	38.3 C (100.9 F)
1957	39.4 C (102.9 F)
1958	38.9 C (102.0 F)
1959	38.9 C (102.0 F)
1960	39.4 C (102.9 F)
1961	39.4 C (102.9 F)
1962	38.3 C (100.9 F)
1963	40.0 C (104.0 F)
1964	39.4 C (102.9 F)
1965	36.7 C (98.1 F)
1966	36.7 C (98.1 F)
1967	40.0 C (104.0 F)
1968	40.0 C (104.0 F)
1969	41.1 C (106.0 F)
1970	37.8 C (100.0 F)
1971	35.6 C (96.1 F)
1972	36.1 C (97.0 F)
1973	37.8 C (100.0 F)
1974	37.8 C (100.0 F)
1975	37.8 C (100.0 F)
1976	37.8 C (100.0 F)
1977	38.9 C (102.0 F)
1978	40.0 C (104.0 F)
1979	38.3 C (100.9 F)
1980	38.3 C (100.9 F)
1981	38.3 C (100.9 F)
1982	39.4 C (102.9 F)
1983	39.4 C (102.9 F)
1984	40.0 C (104.0 F)
1985	37.8 C (100.0 F)
1987	37.8 C (100.0 F)
1988	40.0 C (104.0 F)
1989	38.9 C (102.0 F)
1990	36.7 C (98.1 F)
1991	39.4 C (102.9 F)
1992	38.9 C (102.0 F)

Coldest night (TNn)

The coldest night of the year at Acatlan de Osorio (Dge), 1952 to 1992. The record is 0.0 C (32.0 F) in 1971, marked on the chart; the median year is 6.1 C (43.0 F).

Coldest night (TNn) at Acatlan de Osorio (Dge) by year
Year	Coldest night (TNn)
1952	n/a
1954	n/a
1955	5.6 C (42.1 F)
1956	2.8 C (37.0 F)
1957	5.0 C (41.0 F)
1958	7.8 C (46.0 F)
1959	6.7 C (44.1 F)
1960	4.4 C (39.9 F)
1961	2.8 C (37.0 F)
1962	8.3 C (46.9 F)
1963	3.3 C (37.9 F)
1964	6.7 C (44.1 F)
1965	4.4 C (39.9 F)
1966	3.3 C (37.9 F)
1967	3.9 C (39.0 F)
1968	5.0 C (41.0 F)
1969	6.1 C (43.0 F)
1970	5.6 C (42.1 F)
1971	0.0 C (32.0 F)
1972	5.0 C (41.0 F)
1973	2.8 C (37.0 F)
1974	5.0 C (41.0 F)
1975	7.8 C (46.0 F)
1976	6.7 C (44.1 F)
1977	6.7 C (44.1 F)
1978	8.9 C (48.0 F)
1979	10.0 C (50.0 F)
1980	6.1 C (43.0 F)
1981	6.7 C (44.1 F)
1982	6.1 C (43.0 F)
1983	6.7 C (44.1 F)
1984	5.6 C (42.1 F)
1985	9.4 C (48.9 F)
1987	0.6 C (33.1 F)
1988	8.9 C (48.0 F)
1989	5.0 C (41.0 F)
1990	6.7 C (44.1 F)
1991	8.9 C (48.0 F)
1992	7.8 C (46.0 F)

Wettest day (Rx1day)

The wettest day of the year at Acatlan de Osorio (Dge), 1952 to 1992. The record is 91.2 mm (3.6 in) in 1989, marked on the chart; the median year is 52.1 mm (2.1 in).

Wettest day (Rx1day) at Acatlan de Osorio (Dge) by year
Year	Wettest day (Rx1day)
1952	49.3 mm (1.9 in)
1954	52.1 mm (2.1 in)
1955	59.4 mm (2.3 in)
1956	59.9 mm (2.4 in)
1957	62.0 mm (2.4 in)
1958	71.9 mm (2.8 in)
1959	47.0 mm (1.9 in)
1960	51.8 mm (2.0 in)
1961	47.5 mm (1.9 in)
1962	83.8 mm (3.3 in)
1963	47.0 mm (1.9 in)
1964	46.0 mm (1.8 in)
1965	49.3 mm (1.9 in)
1966	53.8 mm (2.1 in)
1967	79.8 mm (3.1 in)
1968	79.0 mm (3.1 in)
1969	35.8 mm (1.4 in)
1970	59.9 mm (2.4 in)
1971	39.9 mm (1.6 in)
1972	24.4 mm (1.0 in)
1973	45.5 mm (1.8 in)
1974	58.4 mm (2.3 in)
1975	46.0 mm (1.8 in)
1976	55.9 mm (2.2 in)
1977	67.6 mm (2.7 in)
1978	41.7 mm (1.6 in)
1979	76.2 mm (3.0 in)
1980	80.8 mm (3.2 in)
1981	90.4 mm (3.6 in)
1982	32.5 mm (1.3 in)
1983	68.3 mm (2.7 in)
1984	50.0 mm (2.0 in)
1985	54.4 mm (2.1 in)
1987	44.2 mm (1.7 in)
1988	55.9 mm (2.2 in)
1989	91.2 mm (3.6 in)
1990	43.4 mm (1.7 in)
1991	0.0 mm (0.00 in)
1992	39.9 mm (1.6 in)

Wettest five days (Rx5day)

The wettest five days of the year at Acatlan de Osorio (Dge), 1952 to 1992. The record is 165.2 mm (6.5 in) in 1965, marked on the chart; the median year is 96.2 mm (3.8 in).

Wettest five days (Rx5day) at Acatlan de Osorio (Dge) by year
Year	Wettest five days (Rx5day)
1952	67.9 mm (2.7 in)
1954	83.1 mm (3.3 in)
1955	126.2 mm (5.0 in)
1956	135.4 mm (5.3 in)
1957	70.7 mm (2.8 in)
1958	157.9 mm (6.2 in)
1959	93.4 mm (3.7 in)
1960	69.6 mm (2.7 in)
1961	81.0 mm (3.2 in)
1962	124.5 mm (4.9 in)
1963	92.4 mm (3.6 in)
1964	89.9 mm (3.5 in)
1965	165.2 mm (6.5 in)
1966	92.9 mm (3.7 in)
1967	110.3 mm (4.3 in)
1968	117.2 mm (4.6 in)
1969	41.1 mm (1.6 in)
1970	112.6 mm (4.4 in)
1971	109.5 mm (4.3 in)
1972	59.2 mm (2.3 in)
1973	103.2 mm (4.1 in)
1974	91.7 mm (3.6 in)
1975	107.7 mm (4.2 in)
1976	97.2 mm (3.8 in)
1977	121.2 mm (4.8 in)
1978	81.3 mm (3.2 in)
1979	118.6 mm (4.7 in)
1980	141.4 mm (5.6 in)
1981	151.6 mm (6.0 in)
1982	54.1 mm (2.1 in)
1983	136.9 mm (5.4 in)
1984	96.2 mm (3.8 in)
1985	124.3 mm (4.9 in)
1987	109.5 mm (4.3 in)
1988	91.4 mm (3.6 in)
1989	95.3 mm (3.8 in)
1990	61.2 mm (2.4 in)
1991	0.0 mm (0.00 in)
1992	90.0 mm (3.5 in)

Longest dry spell (CDD)

The longest dry spell of the year at Acatlan de Osorio (Dge), 1952 to 1992. The record is 151 days in 1991, marked on the chart; the median year is 74 days.

Longest dry spell (CDD) at Acatlan de Osorio (Dge) by year
Year	Longest dry spell (CDD)
1952	59 days
1954	79 days
1955	85 days
1956	73 days
1957	53 days
1958	49 days
1959	83 days
1960	128 days
1961	93 days
1962	101 days
1963	121 days
1964	64 days
1965	74 days
1966	74 days
1967	50 days
1968	46 days
1969	115 days
1970	91 days
1971	78 days
1972	109 days
1973	95 days
1974	49 days
1975	75 days
1976	59 days
1977	37 days
1978	60 days
1979	49 days
1980	72 days
1981	62 days
1982	80 days
1983	93 days
1984	61 days
1985	73 days
1987	95 days
1988	123 days
1989	81 days
1990	52 days
1991	151 days
1992	71 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

30 years, 1952 to 1989

A day with at least 56.7 mm (2.2 in) of rain is expected about once in 2 years. A day with at least 107.7 mm (4.2 in) of rain is expected about once in 100 years.

Rainfall return levels at Acatlan de Osorio (Dge): the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	56.7 mm (2.2 in)
5 years	72.3 mm (2.8 in)
10 years	81.8 mm (3.2 in)
25 years	92.9 mm (3.7 in)
50 years	100.6 mm (4.0 in)	Longer than the 30 years of record
100 years	107.7 mm (4.2 in)	Longer than the 30 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, 30 years of values from 1952 to 1989.

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: 91.2 mm (3.6 in) in 1989; 90.4 mm (3.6 in) in 1981; 83.8 mm (3.3 in) in 1962.

Download the Data

Data for Acatlan de Osorio (Dge) standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Acatlan de Osorio (Dge) 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).