Omealca Weather Records (MXN00030119)

Record envelope, standing records and threshold days for Omealca (MXN00030119), Mexico, with 30 years of record.

Key Facts for Omealca

Omealca (MXN00030119) is a weather station in Mexico at 18.73 latitude and -96.78 longitude, 423 m (1,387 ft) above sea level.
The station reports from 1951 to 1980, 30 years of record.
1,464 records set at Omealca still stand.
Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

Location: Mexico, 18.73 latitude, -96.78 longitude.
Elevation: 423 m (1,387 ft).
Period of record: 1951 to 1980, 30 years.
Eligible elements: none yet.

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 Omealca. 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 Omealca, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	32.8 C (91.0 F)	7.8 C (46.0 F)	n/a	n/a
Feb	40.0 C (104.0 F)	8.9 C (48.0 F)	n/a	n/a
Mar	40.0 C (104.0 F)	7.8 C (46.0 F)	n/a	n/a
Apr	40.6 C (105.1 F)	10.0 C (50.0 F)	n/a	n/a
May	40.0 C (104.0 F)	10.6 C (51.1 F)	n/a	n/a
Jun	40.0 C (104.0 F)	13.9 C (57.0 F)	n/a	n/a
Jul	40.6 C (105.1 F)	13.9 C (57.0 F)	n/a	n/a
Aug	40.6 C (105.1 F)	13.9 C (57.0 F)	n/a	n/a
Sep	35.6 C (96.1 F)	12.8 C (55.0 F)	n/a	n/a
Oct	35.0 C (95.0 F)	11.7 C (53.1 F)	n/a	n/a
Nov	33.9 C (93.0 F)	10.0 C (50.0 F)	n/a	n/a
Dec	36.7 C (98.1 F)	8.9 C (48.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Omealca still stand. 1979 holds the most, with 151.

Standing records at Omealca by the year they were set
Year set	Standing records
1951	3
1952	136
1953	93
1954	33
1955	57
1956	40
1957	54
1958	45
1959	23
1960	82
1961	46
1962	27
1963	29
1964	38
1965	71
1966	38
1967	32
1968	29
1969	37
1970	46
1972	66
1973	49
1974	33
1975	31
1976	103
1977	26
1978	25
1979	151
1980	21

Wettest Day of Each Month

Sep: 244.9 mm (9.6 in)

The wettest day on record for each calendar month at Omealca. The most was 244.9 mm (9.6 in) on 20 September 1974.

Record daily precipitation for each month at Omealca
Month	Record daily precipitation (mm)	Date
Jan	62.0 mm (2.4 in)	24 January 1974
Feb	134.9 mm (5.3 in)	6 February 1975
Mar	63.0 mm (2.5 in)	11 March 1974
Apr	99.8 mm (3.9 in)	10 April 1968
May	104.9 mm (4.1 in)	31 May 1964
Jun	142.7 mm (5.6 in)	22 June 1978
Jul	164.8 mm (6.5 in)	9 July 1976
Aug	180.3 mm (7.1 in)	4 August 1970
Sep	244.9 mm (9.6 in)	20 September 1974
Oct	220.0 mm (8.7 in)	6 October 1968
Nov	141.0 mm (5.6 in)	3 November 1960
Dec	59.9 mm (2.4 in)	8 December 1968

Period of Record Coverage

1951 to 1980

29 years of record at Omealca, 1951 to 1980. 6 years have data for under 90 percent of days and are left out of rankings: 1951, 1961, 1962, 1972, 1975, 1980.

Days with data per year at Omealca
Year	Days with data	Share of year	Complete
1951	17	5%	No
1952	364	99%	Yes
1953	364	100%	Yes
1954	365	100%	Yes
1955	365	100%	Yes
1956	366	100%	Yes
1957	365	100%	Yes
1958	333	91%	Yes
1959	365	100%	Yes
1960	365	100%	Yes
1961	271	74%	No
1962	310	85%	No
1963	364	100%	Yes
1964	366	100%	Yes
1965	365	100%	Yes
1966	361	99%	Yes
1967	365	100%	Yes
1968	364	99%	Yes
1969	361	99%	Yes
1970	364	100%	Yes
1972	210	57%	No
1973	353	97%	Yes
1974	365	100%	Yes
1975	273	75%	No
1976	366	100%	Yes
1977	333	91%	Yes
1978	362	99%	Yes
1979	365	100%	Yes
1980	152	42%	No

Latest Records

No records were set at this station in the latest data.

Climate Trend

21 complete years, 1952 to 1979

One stripe for each of 21 complete years at Omealca, 1952 to 1979. Blue stripes are years cooler than the station's own mean of 23.0 C (73.3 F); red stripes are warmer. The coolest year was 1979, at 21.5 C (70.6 F), and the warmest was 1952, at 24.0 C (75.3 F). The strongest colour marks a difference of 1.5 C (2.7 F).

Annual mean temperature at Omealca as warming stripes, 1952 to 1979
Year	Annual mean temperature	Difference from the station mean
1952	24.0 C	+1.08 C
1953	23.9 C	+0.89 C
1954	23.1 C	+0.16 C
1955	23.5 C	+0.56 C
1956	23.1 C	+0.14 C
1957	23.8 C	+0.85 C
1959	22.8 C	-0.15 C
1960	23.9 C	+0.98 C
1963	22.6 C	-0.36 C
1964	23.0 C	+0.02 C
1965	23.2 C	+0.28 C
1966	22.1 C	-0.89 C
1967	22.5 C	-0.48 C
1968	22.5 C	-0.49 C
1969	23.0 C	+0.00 C
1970	22.7 C	-0.28 C
1973	22.7 C	-0.27 C
1974	22.5 C	-0.42 C
1976	23.0 C	-0.01 C
1978	22.8 C	-0.16 C
1979	21.5 C	-1.49 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

1951 to 1980

Yearly extremes at Omealca: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	40.6 C (105.1 F)	1952	37.8 C (100.0 F)	29
Coldest night (TNn)	7.8 C (46.0 F)	1958	10.0 C (50.0 F)	29
Wettest day (Rx1day)	244.9 mm (9.6 in)	1974	129.8 mm (5.1 in)	29
Wettest five days (Rx5day)	445.4 mm (17.5 in)	1969	261.7 mm (10.3 in)	29
Longest dry spell (CDD)	65 days	1953	25 days	29

Hottest day (TXx)

The hottest day of the year at Omealca, 1951 to 1980. The record is 40.6 C (105.1 F) in 1952, marked on the chart; the median year is 37.8 C (100.0 F).

Hottest day (TXx) at Omealca by year
Year	Hottest day (TXx)
1951	31.1 C (88.0 F)
1952	40.6 C (105.1 F)
1953	40.6 C (105.1 F)
1954	37.8 C (100.0 F)
1955	38.9 C (102.0 F)
1956	35.0 C (95.0 F)
1957	37.8 C (100.0 F)
1958	38.9 C (102.0 F)
1959	35.0 C (95.0 F)
1960	38.9 C (102.0 F)
1961	40.0 C (104.0 F)
1962	37.8 C (100.0 F)
1963	36.7 C (98.1 F)
1964	38.9 C (102.0 F)
1965	38.9 C (102.0 F)
1966	35.6 C (96.1 F)
1967	37.8 C (100.0 F)
1968	38.9 C (102.0 F)
1969	40.0 C (104.0 F)
1970	40.0 C (104.0 F)
1972	35.6 C (96.1 F)
1973	40.0 C (104.0 F)
1974	35.6 C (96.1 F)
1975	36.7 C (98.1 F)
1976	37.8 C (100.0 F)
1977	37.8 C (100.0 F)
1978	35.6 C (96.1 F)
1979	38.9 C (102.0 F)
1980	32.8 C (91.0 F)

Coldest night (TNn)

The coldest night of the year at Omealca, 1951 to 1980. The record is 7.8 C (46.0 F) in 1958, marked on the chart; the median year is 10.0 C (50.0 F).

Coldest night (TNn) at Omealca by year
Year	Coldest night (TNn)
1951	13.3 C (55.9 F)
1952	8.9 C (48.0 F)
1953	8.9 C (48.0 F)
1954	8.9 C (48.0 F)
1955	10.0 C (50.0 F)
1956	8.9 C (48.0 F)
1957	8.9 C (48.0 F)
1958	7.8 C (46.0 F)
1959	10.0 C (50.0 F)
1960	8.9 C (48.0 F)
1961	8.9 C (48.0 F)
1962	10.0 C (50.0 F)
1963	10.0 C (50.0 F)
1964	10.0 C (50.0 F)
1965	10.0 C (50.0 F)
1966	10.0 C (50.0 F)
1967	8.9 C (48.0 F)
1968	7.8 C (46.0 F)
1969	10.0 C (50.0 F)
1970	8.9 C (48.0 F)
1972	15.0 C (59.0 F)
1973	8.9 C (48.0 F)
1974	10.6 C (51.1 F)
1975	8.9 C (48.0 F)
1976	10.6 C (51.1 F)
1977	8.9 C (48.0 F)
1978	10.0 C (50.0 F)
1979	10.0 C (50.0 F)
1980	10.0 C (50.0 F)

Wettest day (Rx1day)

The wettest day of the year at Omealca, 1951 to 1980. The record is 244.9 mm (9.6 in) in 1974, marked on the chart; the median year is 129.8 mm (5.1 in).

Wettest day (Rx1day) at Omealca by year
Year	Wettest day (Rx1day)
1951	9.9 mm (0.39 in)
1952	87.9 mm (3.5 in)
1953	65.8 mm (2.6 in)
1954	143.8 mm (5.7 in)
1955	176.8 mm (7.0 in)
1956	100.8 mm (4.0 in)
1957	123.7 mm (4.9 in)
1958	110.0 mm (4.3 in)
1959	141.0 mm (5.6 in)
1960	141.0 mm (5.6 in)
1961	88.9 mm (3.5 in)
1962	104.9 mm (4.1 in)
1963	111.0 mm (4.4 in)
1964	129.8 mm (5.1 in)
1965	86.9 mm (3.4 in)
1966	127.0 mm (5.0 in)
1967	160.3 mm (6.3 in)
1968	220.0 mm (8.7 in)
1969	147.8 mm (5.8 in)
1970	191.3 mm (7.5 in)
1972	132.8 mm (5.2 in)
1973	99.8 mm (3.9 in)
1974	244.9 mm (9.6 in)
1975	134.9 mm (5.3 in)
1976	164.8 mm (6.5 in)
1977	190.0 mm (7.5 in)
1978	154.9 mm (6.1 in)
1979	122.9 mm (4.8 in)
1980	62.0 mm (2.4 in)

Wettest five days (Rx5day)

The wettest five days of the year at Omealca, 1951 to 1980. The record is 445.4 mm (17.5 in) in 1969, marked on the chart; the median year is 261.7 mm (10.3 in).

Wettest five days (Rx5day) at Omealca by year
Year	Wettest five days (Rx5day)
1951	9.9 mm (0.39 in)
1952	317.1 mm (12.5 in)
1953	131.7 mm (5.2 in)
1954	372.4 mm (14.7 in)
1955	367.6 mm (14.5 in)
1956	289.8 mm (11.4 in)
1957	154.0 mm (6.1 in)
1958	248.2 mm (9.8 in)
1959	261.7 mm (10.3 in)
1960	268.8 mm (10.6 in)
1961	220.0 mm (8.7 in)
1962	254.3 mm (10.0 in)
1963	288.5 mm (11.4 in)
1964	300.3 mm (11.8 in)
1965	280.5 mm (11.0 in)
1966	175.3 mm (6.9 in)
1967	230.9 mm (9.1 in)
1968	274.4 mm (10.8 in)
1969	445.4 mm (17.5 in)
1970	401.3 mm (15.8 in)
1972	256.8 mm (10.1 in)
1973	257.0 mm (10.1 in)
1974	355.4 mm (14.0 in)
1975	145.6 mm (5.7 in)
1976	419.4 mm (16.5 in)
1977	237.5 mm (9.4 in)
1978	284.5 mm (11.2 in)
1979	238.0 mm (9.4 in)
1980	64.8 mm (2.6 in)

Longest dry spell (CDD)

The longest dry spell of the year at Omealca, 1951 to 1980. The record is 65 days in 1953, marked on the chart; the median year is 25 days.

Longest dry spell (CDD) at Omealca by year
Year	Longest dry spell (CDD)
1951	7 days
1952	34 days
1953	65 days
1954	44 days
1955	28 days
1956	17 days
1957	37 days
1958	25 days
1959	29 days
1960	53 days
1961	13 days
1962	31 days
1963	22 days
1964	27 days
1965	15 days
1966	16 days
1967	18 days
1968	30 days
1969	19 days
1970	32 days
1972	30 days
1973	46 days
1974	19 days
1975	38 days
1976	14 days
1977	16 days
1978	20 days
1979	16 days
1980	19 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.

Download the Data

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