Melchor Ocampo (Cfe) Weather Records (MXN00030106)

Record envelope, standing records and threshold days for Melchor Ocampo (Cfe) (MXN00030106), Mexico, with 37 years of record.

Key Facts for Melchor Ocampo (Cfe)

Melchor Ocampo (Cfe) (MXN00030106) is a weather station in Mexico at 20.33 latitude and -97.53 longitude, 139 m (456 ft) above sea level.
The station reports from 1961 to 1997, 37 years of record.
1,464 records set at Melchor Ocampo (Cfe) still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Melchor Ocampo (Cfe) set a daily record low minimum temperature of 15.0 C (59.0 F) on 30 April 1997.

About the Station

Location: Mexico, 20.33 latitude, -97.53 longitude.
Elevation: 139 m (456 ft).
Period of record: 1961 to 1997, 37 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 Melchor Ocampo (Cfe). 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 Melchor Ocampo (Cfe), with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	36.1 C (97.0 F)	-2.2 C (28.0 F)	n/a	n/a
Feb	37.8 C (100.0 F)	5.0 C (41.0 F)	n/a	n/a
Mar	40.0 C (104.0 F)	5.0 C (41.0 F)	n/a	n/a
Apr	44.4 C (111.9 F)	7.8 C (46.0 F)	n/a	n/a
May	43.9 C (111.0 F)	12.8 C (55.0 F)	n/a	n/a
Jun	41.1 C (106.0 F)	12.8 C (55.0 F)	n/a	n/a
Jul	38.9 C (102.0 F)	15.0 C (59.0 F)	n/a	n/a
Aug	39.4 C (102.9 F)	13.9 C (57.0 F)	n/a	n/a
Sep	38.9 C (102.0 F)	11.1 C (52.0 F)	n/a	n/a
Oct	41.7 C (107.1 F)	10.0 C (50.0 F)	n/a	n/a
Nov	40.6 C (105.1 F)	3.9 C (39.0 F)	n/a	n/a
Dec	38.3 C (100.9 F)	0.0 C (32.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Melchor Ocampo (Cfe) still stand. 1969 holds the most, with 174.

Standing records at Melchor Ocampo (Cfe) by the year they were set
Year set	Standing records
1961	45
1962	36
1963	44
1964	56
1965	22
1966	39
1967	92
1968	86
1969	174
1970	113
1971	27
1972	36
1973	50
1974	42
1975	31
1976	32
1977	23
1978	15
1979	41
1980	31
1981	23
1982	30
1983	47
1984	40
1985	21
1986	18
1987	31
1988	21
1989	45
1990	10
1991	31
1992	22
1993	15
1994	15
1995	19
1996	38
1997	3

All-Time Record Progression

2 new records

2 all-time records were set at Melchor Ocampo (Cfe) between 30 April 1991 and 5 June 1992. Each dot is a new record.

When Melchor Ocampo (Cfe) set new all-time records
Date	Kind	Detail
1991-04-30	Record high maximum temperature	Record high maximum temperature 44.4 C (111.9 F)
1992-06-05	Record high minimum temperature	Record high minimum temperature 28.9 C (84.0 F)

Wettest Day of Each Month

Oct: 319.8 mm (12.6 in)

The wettest day on record for each calendar month at Melchor Ocampo (Cfe). The most was 319.8 mm (12.6 in) on 16 October 1976.

Record daily precipitation for each month at Melchor Ocampo (Cfe)
Month	Record daily precipitation (mm)	Date
Jan	43.9 mm (1.7 in)	24 January 1969
Feb	59.9 mm (2.4 in)	17 February 1970
Mar	74.9 mm (2.9 in)	23 March 1967
Apr	175.3 mm (6.9 in)	10 April 1982
May	201.9 mm (7.9 in)	31 May 1964
Jun	154.4 mm (6.1 in)	25 June 1966
Jul	254.8 mm (10.0 in)	1 July 1963
Aug	127.3 mm (5.0 in)	27 August 1981
Sep	194.8 mm (7.7 in)	20 September 1974
Oct	319.8 mm (12.6 in)	16 October 1976
Nov	253.5 mm (10.0 in)	21 November 1977
Dec	77.5 mm (3.1 in)	14 December 1991

Period of Record Coverage

1961 to 1997

37 years of record at Melchor Ocampo (Cfe), 1961 to 1997. 5 years have data for under 90 percent of days and are left out of rankings: 1961, 1965, 1969, 1976, 1997.

Days with data per year at Melchor Ocampo (Cfe)
Year	Days with data	Share of year	Complete
1961	237	65%	No
1962	362	99%	Yes
1963	360	99%	Yes
1964	358	98%	Yes
1965	299	82%	No
1966	359	98%	Yes
1967	364	100%	Yes
1968	358	98%	Yes
1969	283	78%	No
1970	358	98%	Yes
1971	361	99%	Yes
1972	360	98%	Yes
1973	361	99%	Yes
1974	358	98%	Yes
1975	356	98%	Yes
1976	302	83%	No
1977	362	99%	Yes
1978	356	98%	Yes
1979	355	97%	Yes
1980	358	98%	Yes
1981	361	99%	Yes
1982	357	98%	Yes
1983	361	99%	Yes
1984	359	98%	Yes
1985	357	98%	Yes
1986	360	99%	Yes
1987	358	98%	Yes
1988	361	99%	Yes
1989	357	98%	Yes
1990	333	91%	Yes
1991	355	97%	Yes
1992	362	99%	Yes
1993	358	98%	Yes
1994	359	98%	Yes
1995	355	97%	Yes
1996	358	98%	Yes
1997	117	32%	No

Latest Records

Latest records at Melchor Ocampo (Cfe)
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
30 April 1997	Melchor Ocampo (Cfe), MX	daily low min	15.0 C (59.0 F)	0.6 C (1.1 F)	28 years	13 of 100 (Routine)
22 April 1997	Melchor Ocampo (Cfe), MX	daily high max	38.3 C (100.9 F)	0.5 C (0.9 F)	6 years	5 of 100 (Routine)
15 April 1997	Melchor Ocampo (Cfe), MX	daily low max (Tie)	21.1 C (70.0 F)	tie	14 years	1 of 100 (Routine)
14 April 1997	Melchor Ocampo (Cfe), MX	daily low max	19.4 C (66.9 F)	0.6 C (1.1 F)	16 years	9 of 100 (Routine)
14 April 1997	Melchor Ocampo (Cfe), MX	daily low min (Tie)	15.0 C (59.0 F)	tie	28 years	2 of 100 (Routine)
13 April 1997	Melchor Ocampo (Cfe), MX	daily rain	8.4 mm (0.33 in)	4.6 mm (0.18 in)	35 years	14 of 100 (Routine)
31 March 1997	Melchor Ocampo (Cfe), MX	daily rain	19.8 mm (0.8 in)	11.7 mm (0.5 in)	6 years	17 of 100 (Routine)
19 March 1997	Melchor Ocampo (Cfe), MX	daily rain	63.8 mm (2.5 in)	42.5 mm (1.7 in)	7 years	45 of 100 (Notable)
5 March 1997	Melchor Ocampo (Cfe), MX	daily rain	25.4 mm (1.0 in)	20.6 mm (0.8 in)	35 years	36 of 100 (Notable)
23 February 1997	Melchor Ocampo (Cfe), MX	daily rain	16.3 mm (0.6 in)	0.6 mm (0.02 in)	27 years	11 of 100 (Routine)
5 February 1997	Melchor Ocampo (Cfe), MX	daily rain	23.4 mm (0.9 in)	15.5 mm (0.6 in)	27 years	20 of 100 (Routine)
30 January 1997	Melchor Ocampo (Cfe), MX	daily low max (Tie)	16.1 C (61.0 F)	tie	5 years	1 of 100 (Routine)
9 January 1997	Melchor Ocampo (Cfe), MX	daily low max (Tie)	14.4 C (57.9 F)	tie	18 years	2 of 100 (Routine)
29 December 1996	Melchor Ocampo (Cfe), MX	daily rain	28.4 mm (1.1 in)	20.0 mm (0.8 in)	2 years	22 of 100 (Routine)
21 December 1996	Melchor Ocampo (Cfe), MX	daily low min	6.7 C (44.1 F)	2.7 C (4.9 F)	30 years	18 of 100 (Routine)
20 December 1996	Melchor Ocampo (Cfe), MX	daily low min	5.6 C (42.1 F)	2.2 C (4.0 F)	30 years	17 of 100 (Routine)
19 December 1996	Melchor Ocampo (Cfe), MX	daily low min	5.6 C (42.1 F)	1.6 C (2.9 F)	30 years	16 of 100 (Routine)
18 December 1996	Melchor Ocampo (Cfe), MX	daily low max	13.9 C (57.0 F)	1.7 C (3.1 F)	15 years	10 of 100 (Routine)
24 November 1996	Melchor Ocampo (Cfe), MX	daily rain	30.0 mm (1.2 in)	10.2 mm (0.4 in)	25 years	14 of 100 (Routine)
20 November 1996	Melchor Ocampo (Cfe), MX	daily high min (Tie)	21.7 C (71.1 F)	tie	22 years	2 of 100 (Routine)

Climate Trend

31 complete years, 1962 to 1996

One stripe for each of 31 complete years at Melchor Ocampo (Cfe), 1962 to 1996. Blue stripes are years cooler than the station's own mean of 24.5 C (76.2 F); red stripes are warmer. The coolest year was 1966, at 23.4 C (74.2 F), and the warmest was 1968, at 26.0 C (78.8 F). The strongest colour marks a difference of 1.5 C (2.7 F).

Annual mean temperature at Melchor Ocampo (Cfe) as warming stripes, 1962 to 1996
Year	Annual mean temperature	Difference from the station mean
1962	23.9 C	-0.61 C
1963	23.9 C	-0.63 C
1964	24.2 C	-0.31 C
1966	23.4 C	-1.12 C
1967	25.7 C	+1.14 C
1968	26.0 C	+1.48 C
1970	25.9 C	+1.36 C
1971	25.0 C	+0.45 C
1972	25.0 C	+0.45 C
1973	24.6 C	+0.07 C
1974	24.5 C	-0.03 C
1975	24.8 C	+0.22 C
1977	24.5 C	-0.05 C
1978	24.3 C	-0.24 C
1979	24.0 C	-0.59 C
1980	24.6 C	+0.06 C
1981	24.5 C	0.00 C
1982	24.8 C	+0.27 C
1983	24.7 C	+0.20 C
1984	24.4 C	-0.18 C
1985	24.6 C	+0.09 C
1986	24.6 C	+0.07 C
1987	23.6 C	-0.92 C
1988	24.0 C	-0.56 C
1989	24.2 C	-0.33 C
1991	24.8 C	+0.30 C
1992	24.0 C	-0.50 C
1993	24.3 C	-0.25 C
1994	24.6 C	+0.10 C
1995	24.9 C	+0.36 C
1996	24.3 C	-0.24 C

The fitted trend in annual mean temperature here over 1962 to 1996 is -0.1 C (-0.3 to 0.1) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.2 F (-0.5 to 0.2) per decade. The slope is a straight line fitted to 31 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Melchor Ocampo (Cfe)
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	-0.1 C (-0.3 to 0.1) per decade	-0.2 F (-0.5 to 0.2) per decade	1962 to 1996	31	Not clearly different from zero
Mean daily maximum	-0.1 C (-0.3 to 0.1) per decade	-0.2 F (-0.6 to 0.2) per decade	1962 to 1996	31	Not clearly different from zero
Mean daily minimum	-0.1 C (-0.3 to 0.2) per decade	-0.1 F (-0.6 to 0.3) per decade	1962 to 1996	31	Not clearly different from zero

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 1997

Yearly extremes at Melchor Ocampo (Cfe): the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	44.4 C (111.9 F)	1991	38.9 C (102.0 F)	37
Coldest night (TNn)	-2.2 C (28.0 F)	1962	5.6 C (42.1 F)	37
Wettest day (Rx1day)	319.8 mm (12.6 in)	1976	105.7 mm (4.2 in)	37
Wettest five days (Rx5day)	341.9 mm (13.5 in)	1976	204.5 mm (8.1 in)	37
Longest dry spell (CDD)	51 days	1962	25 days	37

Hottest day (TXx)

The hottest day of the year at Melchor Ocampo (Cfe), 1961 to 1997. The record is 44.4 C (111.9 F) in 1991, marked on the chart; the median year is 38.9 C (102.0 F).

Hottest day (TXx) at Melchor Ocampo (Cfe) by year
Year	Hottest day (TXx)
1961	38.9 C (102.0 F)
1962	38.9 C (102.0 F)
1963	40.0 C (104.0 F)
1964	40.0 C (104.0 F)
1965	38.3 C (100.9 F)
1966	36.1 C (97.0 F)
1967	40.0 C (104.0 F)
1968	37.2 C (99.0 F)
1969	41.7 C (107.1 F)
1970	37.2 C (99.0 F)
1971	41.7 C (107.1 F)
1972	39.4 C (102.9 F)
1973	41.1 C (106.0 F)
1974	40.6 C (105.1 F)
1975	40.6 C (105.1 F)
1976	36.7 C (98.1 F)
1977	38.3 C (100.9 F)
1978	40.6 C (105.1 F)
1979	37.8 C (100.0 F)
1980	41.1 C (106.0 F)
1981	36.7 C (98.1 F)
1982	37.2 C (99.0 F)
1983	40.0 C (104.0 F)
1984	43.9 C (111.0 F)
1985	38.3 C (100.9 F)
1986	37.2 C (99.0 F)
1987	36.7 C (98.1 F)
1988	38.9 C (102.0 F)
1989	41.1 C (106.0 F)
1990	38.3 C (100.9 F)
1991	44.4 C (111.9 F)
1992	36.7 C (98.1 F)
1993	36.1 C (97.0 F)
1994	37.2 C (99.0 F)
1995	39.4 C (102.9 F)
1996	38.9 C (102.0 F)
1997	38.3 C (100.9 F)

Coldest night (TNn)

The coldest night of the year at Melchor Ocampo (Cfe), 1961 to 1997. The record is -2.2 C (28.0 F) in 1962, marked on the chart; the median year is 5.6 C (42.1 F).

Coldest night (TNn) at Melchor Ocampo (Cfe) by year
Year	Coldest night (TNn)
1961	5.6 C (42.1 F)
1962	-2.2 C (28.0 F)
1963	1.7 C (35.1 F)
1964	5.6 C (42.1 F)
1965	6.1 C (43.0 F)
1966	3.9 C (39.0 F)
1967	5.0 C (41.0 F)
1968	7.8 C (46.0 F)
1969	5.0 C (41.0 F)
1970	5.0 C (41.0 F)
1971	7.2 C (45.0 F)
1972	8.3 C (46.9 F)
1973	3.3 C (37.9 F)
1974	5.0 C (41.0 F)
1975	5.0 C (41.0 F)
1976	7.2 C (45.0 F)
1977	5.0 C (41.0 F)
1978	5.0 C (41.0 F)
1979	7.2 C (45.0 F)
1980	8.3 C (46.9 F)
1981	8.3 C (46.9 F)
1982	7.2 C (45.0 F)
1983	2.2 C (36.0 F)
1984	8.3 C (46.9 F)
1985	3.9 C (39.0 F)
1986	3.3 C (37.9 F)
1987	5.0 C (41.0 F)
1988	7.8 C (46.0 F)
1989	0.0 C (32.0 F)
1990	7.8 C (46.0 F)
1991	6.7 C (44.1 F)
1992	7.8 C (46.0 F)
1993	7.8 C (46.0 F)
1994	5.0 C (41.0 F)
1995	10.6 C (51.1 F)
1996	5.0 C (41.0 F)
1997	10.0 C (50.0 F)

Wettest day (Rx1day)

The wettest day of the year at Melchor Ocampo (Cfe), 1961 to 1997. The record is 319.8 mm (12.6 in) in 1976, marked on the chart; the median year is 105.7 mm (4.2 in).

Wettest day (Rx1day) at Melchor Ocampo (Cfe) by year
Year	Wettest day (Rx1day)
1961	88.4 mm (3.5 in)
1962	58.4 mm (2.3 in)
1963	254.8 mm (10.0 in)
1964	201.9 mm (7.9 in)
1965	66.3 mm (2.6 in)
1966	169.9 mm (6.7 in)
1967	96.8 mm (3.8 in)
1968	134.9 mm (5.3 in)
1969	53.8 mm (2.1 in)
1970	87.4 mm (3.4 in)
1971	150.9 mm (5.9 in)
1972	84.3 mm (3.3 in)
1973	103.4 mm (4.1 in)
1974	194.8 mm (7.7 in)
1975	109.0 mm (4.3 in)
1976	319.8 mm (12.6 in)
1977	253.5 mm (10.0 in)
1978	99.8 mm (3.9 in)
1979	91.7 mm (3.6 in)
1980	124.0 mm (4.9 in)
1981	127.3 mm (5.0 in)
1982	175.3 mm (6.9 in)
1983	105.4 mm (4.1 in)
1984	94.0 mm (3.7 in)
1985	104.9 mm (4.1 in)
1986	85.3 mm (3.4 in)
1987	100.8 mm (4.0 in)
1988	125.0 mm (4.9 in)
1989	106.4 mm (4.2 in)
1990	113.3 mm (4.5 in)
1991	140.0 mm (5.5 in)
1992	105.7 mm (4.2 in)
1993	125.0 mm (4.9 in)
1994	65.8 mm (2.6 in)
1995	116.6 mm (4.6 in)
1996	83.3 mm (3.3 in)
1997	63.8 mm (2.5 in)

Wettest five days (Rx5day)

The wettest five days of the year at Melchor Ocampo (Cfe), 1961 to 1997. The record is 341.9 mm (13.5 in) in 1976, marked on the chart; the median year is 204.5 mm (8.1 in).

Wettest five days (Rx5day) at Melchor Ocampo (Cfe) by year
Year	Wettest five days (Rx5day)
1961	204.5 mm (8.1 in)
1962	146.6 mm (5.8 in)
1963	328.0 mm (12.9 in)
1964	202.7 mm (8.0 in)
1965	153.7 mm (6.1 in)
1966	235.7 mm (9.3 in)
1967	261.9 mm (10.3 in)
1968	252.5 mm (9.9 in)
1969	134.8 mm (5.3 in)
1970	170.0 mm (6.7 in)
1971	224.1 mm (8.8 in)
1972	144.5 mm (5.7 in)
1973	217.3 mm (8.6 in)
1974	293.4 mm (11.6 in)
1975	307.9 mm (12.1 in)
1976	341.9 mm (13.5 in)
1977	260.4 mm (10.3 in)
1978	158.0 mm (6.2 in)
1979	119.4 mm (4.7 in)
1980	164.3 mm (6.5 in)
1981	314.3 mm (12.4 in)
1982	183.7 mm (7.2 in)
1983	141.0 mm (5.6 in)
1984	221.3 mm (8.7 in)
1985	256.8 mm (10.1 in)
1986	162.1 mm (6.4 in)
1987	192.5 mm (7.6 in)
1988	266.8 mm (10.5 in)
1989	173.5 mm (6.8 in)
1990	261.9 mm (10.3 in)
1991	260.3 mm (10.2 in)
1992	185.7 mm (7.3 in)
1993	230.9 mm (9.1 in)
1994	160.8 mm (6.3 in)
1995	211.9 mm (8.3 in)
1996	99.2 mm (3.9 in)
1997	74.0 mm (2.9 in)

Longest dry spell (CDD)

The longest dry spell of the year at Melchor Ocampo (Cfe), 1961 to 1997. The record is 51 days in 1962, marked on the chart; the median year is 25 days.

Longest dry spell (CDD) at Melchor Ocampo (Cfe) by year
Year	Longest dry spell (CDD)
1961	40 days
1962	51 days
1963	25 days
1964	28 days
1965	18 days
1966	21 days
1967	38 days
1968	23 days
1969	23 days
1970	23 days
1971	32 days
1972	22 days
1973	27 days
1974	18 days
1975	30 days
1976	11 days
1977	30 days
1978	51 days
1979	32 days
1980	23 days
1981	21 days
1982	22 days
1983	39 days
1984	39 days
1985	24 days
1986	31 days
1987	15 days
1988	30 days
1989	37 days
1990	21 days
1991	34 days
1992	18 days
1993	19 days
1994	32 days
1995	35 days
1996	21 days
1997	11 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, 1962 to 1996

A day with at least 111.8 mm (4.4 in) of rain is expected about once in 2 years. A day with at least 320.7 mm (12.6 in) of rain is expected about once in 100 years.

Rainfall return levels at Melchor Ocampo (Cfe): the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	111.8 mm (4.4 in)
5 years	151.3 mm (6.0 in)
10 years	182.9 mm (7.2 in)
25 years	230.7 mm (9.1 in)
50 years	272.6 mm (10.7 in)	Longer than the 32 years of record
100 years	320.7 mm (12.6 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 1962 to 1996.

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: 254.8 mm (10.0 in) in 1963; 253.5 mm (10.0 in) in 1977; 201.9 mm (7.9 in) in 1964.

Download the Data

Data for Melchor Ocampo (Cfe) standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Melchor Ocampo (Cfe) 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 2026-10-16 (16 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).