Celestun (Smn) Weather Records (MXN00031004)

Record envelope, standing records and threshold days for Celestun (Smn) (MXN00031004), Mexico, with 41 years of record.

Key Facts for Celestun (Smn)

Celestun (Smn) (MXN00031004) is a weather station in Mexico at 20.85 latitude and -90.40 longitude, 3 m (9 ft) above sea level.
The station reports from 1943 to 1983, 41 years of record.
1,464 records set at Celestun (Smn) still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Celestun (Smn) set a daily record precipitation of 47.5 mm (1.9 in) on 24 November 1983.

About the Station

Location: Mexico, 20.85 latitude, -90.40 longitude.
Elevation: 3 m (9 ft).
Period of record: 1943 to 1983, 41 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 Celestun (Smn). 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 Celestun (Smn), 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)	8.9 C (48.0 F)	n/a	n/a
Feb	38.9 C (102.0 F)	9.4 C (48.9 F)	n/a	n/a
Mar	41.7 C (107.1 F)	10.0 C (50.0 F)	n/a	n/a
Apr	42.8 C (109.0 F)	12.8 C (55.0 F)	n/a	n/a
May	45.6 C (114.1 F)	16.7 C (62.1 F)	n/a	n/a
Jun	43.3 C (109.9 F)	17.8 C (64.0 F)	n/a	n/a
Jul	42.2 C (108.0 F)	18.9 C (66.0 F)	n/a	n/a
Aug	40.0 C (104.0 F)	16.7 C (62.1 F)	n/a	n/a
Sep	38.9 C (102.0 F)	18.9 C (66.0 F)	n/a	n/a
Oct	39.4 C (102.9 F)	15.0 C (59.0 F)	n/a	n/a
Nov	37.8 C (100.0 F)	11.7 C (53.1 F)	n/a	n/a
Dec	39.4 C (102.9 F)	8.9 C (48.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Celestun (Smn) still stand. 1953 holds the most, with 107.

Standing records at Celestun (Smn) by the year they were set
Year set	Standing records
1952	21
1953	107
1954	53
1955	58
1956	35
1957	65
1958	94
1959	76
1960	54
1961	45
1962	49
1963	43
1964	76
1965	33
1966	43
1967	38
1968	44
1969	37
1970	51
1971	56
1972	36
1973	80
1974	58
1975	74
1978	15
1979	17
1980	19
1981	41
1982	21
1983	25

Wettest Day of Each Month

Sep: 183.4 mm (7.2 in)

The wettest day on record for each calendar month at Celestun (Smn). The most was 183.4 mm (7.2 in) on 16 September 1955.

Record daily precipitation for each month at Celestun (Smn)
Month	Record daily precipitation (mm)	Date
Jan	65.8 mm (2.6 in)	15 January 1972
Feb	71.9 mm (2.8 in)	28 February 1975
Mar	80.8 mm (3.2 in)	24 March 1978
Apr	85.9 mm (3.4 in)	6 April 1967
May	77.0 mm (3.0 in)	1 May 1960
Jun	102.4 mm (4.0 in)	30 June 1952
Jul	74.9 mm (2.9 in)	9 July 1960
Aug	121.9 mm (4.8 in)	9 August 1963
Sep	183.4 mm (7.2 in)	16 September 1955
Oct	121.9 mm (4.8 in)	30 October 1980
Nov	57.9 mm (2.3 in)	18 November 1959
Dec	109.0 mm (4.3 in)	3 December 1965

Period of Record Coverage

1952 to 1983

30 years of record at Celestun (Smn), 1952 to 1983. 5 years have data for under 90 percent of days and are left out of rankings: 1952, 1969, 1975, 1978, 1979.

Days with data per year at Celestun (Smn)
Year	Days with data	Share of year	Complete
1952	153	42%	No
1953	365	100%	Yes
1954	364	100%	Yes
1955	356	98%	Yes
1956	363	99%	Yes
1957	365	100%	Yes
1958	361	99%	Yes
1959	364	100%	Yes
1960	365	100%	Yes
1961	364	100%	Yes
1962	364	100%	Yes
1963	364	100%	Yes
1964	360	98%	Yes
1965	347	95%	Yes
1966	364	100%	Yes
1967	365	100%	Yes
1968	365	100%	Yes
1969	304	83%	No
1970	363	99%	Yes
1971	365	100%	Yes
1972	366	100%	Yes
1973	334	92%	Yes
1974	334	92%	Yes
1975	123	34%	No
1978	275	75%	No
1979	243	67%	No
1980	366	100%	Yes
1981	365	100%	Yes
1982	365	100%	Yes
1983	334	92%	Yes

Latest Records

Latest records at Celestun (Smn)
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
24 November 1983	Celestun (Smn), MX	daily rain	47.5 mm (1.9 in)	17.5 mm (0.7 in)	12 years	20 of 100 (Routine)
27 October 1983	Celestun (Smn), MX	daily rain	31.0 mm (1.2 in)	21.1 mm (0.8 in)	36 years	24 of 100 (Routine)
14 October 1983	Celestun (Smn), MX	daily rain (Tie)	15.0 mm (0.6 in)	tie	36 years	3 of 100 (Routine)
26 July 1983	Celestun (Smn), MX	daily rain	73.9 mm (2.9 in)	37.6 mm (1.5 in)	28 years	42 of 100 (Notable)
11 July 1983	Celestun (Smn), MX	daily rain	47.0 mm (1.9 in)	21.1 mm (0.8 in)	13 years	24 of 100 (Routine)
10 July 1983	Celestun (Smn), MX	daily rain	51.3 mm (2.0 in)	3.8 mm (0.15 in)	28 years	15 of 100 (Routine)
27 June 1983	Celestun (Smn), MX	daily rain	21.8 mm (0.9 in)	9.4 mm (0.37 in)	17 years	14 of 100 (Routine)
2 April 1983	Celestun (Smn), MX	daily rain	1.3 mm (0.05 in)	1.3 mm (0.05 in)	38 years	16 of 100 (Routine)
11 February 1983	Celestun (Smn), MX	daily rain	68.8 mm (2.7 in)	26.4 mm (1.0 in)	28 years	32 of 100 (Routine)
24 January 1983	Celestun (Smn), MX	daily rain	7.9 mm (0.31 in)	7.1 mm (0.28 in)	20 years	16 of 100 (Routine)
20 January 1983	Celestun (Smn), MX	daily rain	20.3 mm (0.8 in)	14.5 mm (0.6 in)	16 years	20 of 100 (Routine)
4 January 1983	Celestun (Smn), MX	daily rain	19.8 mm (0.8 in)	4.1 mm (0.16 in)	24 years	14 of 100 (Routine)
12 December 1982	Celestun (Smn), MX	daily rain	15.7 mm (0.6 in)	0.7 mm (0.03 in)	12 years	7 of 100 (Routine)
6 December 1982	Celestun (Smn), MX	daily rain	66.3 mm (2.6 in)	41.4 mm (1.6 in)	20 years	36 of 100 (Notable)
4 November 1982	Celestun (Smn), MX	daily rain	9.4 mm (0.37 in)	4.6 mm (0.18 in)	11 years	10 of 100 (Routine)
22 October 1982	Celestun (Smn), MX	daily rain	6.1 mm (0.24 in)	2.3 mm (0.09 in)	21 years	11 of 100 (Routine)
20 September 1982	Celestun (Smn), MX	daily rain	29.5 mm (1.2 in)	11.7 mm (0.5 in)	29 years	18 of 100 (Routine)
15 July 1982	Celestun (Smn), MX	daily rain	23.9 mm (0.9 in)	4.1 mm (0.16 in)	21 years	13 of 100 (Routine)
4 July 1982	Celestun (Smn), MX	daily rain	28.4 mm (1.1 in)	7.1 mm (0.28 in)	28 years	17 of 100 (Routine)
13 June 1982	Celestun (Smn), MX	daily rain	25.1 mm (1.0 in)	3.3 mm (0.13 in)	21 years	11 of 100 (Routine)

Climate Trend

22 complete years, 1953 to 1982

One stripe for each of 22 complete years at Celestun (Smn), 1953 to 1982. Blue stripes are years cooler than the station's own mean of 26.3 C (79.3 F); red stripes are warmer. The coolest year was 1966, at 25.3 C (77.5 F), and the warmest was 1953, at 27.5 C (81.5 F). The strongest colour marks a difference of 1.3 C (2.3 F).

Annual mean temperature at Celestun (Smn) as warming stripes, 1953 to 1982
Year	Annual mean temperature	Difference from the station mean
1953	27.5 C	+1.24 C
1954	26.7 C	+0.41 C
1955	26.4 C	+0.17 C
1956	26.2 C	-0.10 C
1957	26.6 C	+0.35 C
1958	26.5 C	+0.18 C
1959	26.9 C	+0.66 C
1960	26.3 C	+0.06 C
1961	27.0 C	+0.68 C
1962	26.5 C	+0.18 C
1963	26.3 C	+0.02 C
1964	26.6 C	+0.35 C
1965	26.2 C	-0.05 C
1966	25.3 C	-1.00 C
1967	25.6 C	-0.68 C
1968	25.3 C	-1.00 C
1970	25.5 C	-0.77 C
1971	25.8 C	-0.47 C
1972	25.9 C	-0.33 C
1980	26.0 C	-0.24 C
1981	26.0 C	-0.23 C
1982	26.9 C	+0.65 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

1943 to 1983

Yearly extremes at Celestun (Smn): the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	45.6 C (114.1 F)	1959	40.0 C (104.0 F)	30
Coldest night (TNn)	8.9 C (48.0 F)	1966	10.6 C (51.1 F)	30
Wettest day (Rx1day)	183.4 mm (7.2 in)	1955	79.0 mm (3.1 in)	39
Wettest five days (Rx5day)	236.0 mm (9.3 in)	1974	109.8 mm (4.3 in)	39
Longest dry spell (CDD)	146 days	1950	65 days	39

Hottest day (TXx)

The hottest day of the year at Celestun (Smn), 1943 to 1983. The record is 45.6 C (114.1 F) in 1959, marked on the chart; the median year is 40.0 C (104.0 F).

Hottest day (TXx) at Celestun (Smn) by year
Year	Hottest day (TXx)
1943	n/a
1944	n/a
1945	n/a
1946	n/a
1947	n/a
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1952	36.1 C (97.0 F)
1953	45.0 C (113.0 F)
1954	42.8 C (109.0 F)
1955	41.1 C (106.0 F)
1956	39.4 C (102.9 F)
1957	41.7 C (107.1 F)
1958	41.1 C (106.0 F)
1959	45.6 C (114.1 F)
1960	39.4 C (102.9 F)
1961	39.4 C (102.9 F)
1962	40.0 C (104.0 F)
1963	40.0 C (104.0 F)
1964	41.7 C (107.1 F)
1965	40.0 C (104.0 F)
1966	38.9 C (102.0 F)
1967	40.0 C (104.0 F)
1968	37.8 C (100.0 F)
1969	40.6 C (105.1 F)
1970	40.0 C (104.0 F)
1971	41.1 C (106.0 F)
1972	39.4 C (102.9 F)
1973	40.0 C (104.0 F)
1974	41.7 C (107.1 F)
1975	41.7 C (107.1 F)
1978	41.1 C (106.0 F)
1979	40.0 C (104.0 F)
1980	38.9 C (102.0 F)
1981	40.0 C (104.0 F)
1982	40.0 C (104.0 F)
1983	40.0 C (104.0 F)

Coldest night (TNn)

The coldest night of the year at Celestun (Smn), 1943 to 1983. The record is 8.9 C (48.0 F) in 1966, marked on the chart; the median year is 10.6 C (51.1 F).

Coldest night (TNn) at Celestun (Smn) by year
Year	Coldest night (TNn)
1943	n/a
1944	n/a
1945	n/a
1946	n/a
1947	n/a
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1952	12.8 C (55.0 F)
1953	10.6 C (51.1 F)
1954	10.6 C (51.1 F)
1955	11.1 C (52.0 F)
1956	11.1 C (52.0 F)
1957	10.6 C (51.1 F)
1958	10.6 C (51.1 F)
1959	11.1 C (52.0 F)
1960	10.6 C (51.1 F)
1961	12.8 C (55.0 F)
1962	11.1 C (52.0 F)
1963	10.0 C (50.0 F)
1964	11.7 C (53.1 F)
1965	9.4 C (48.9 F)
1966	8.9 C (48.0 F)
1967	10.0 C (50.0 F)
1968	10.0 C (50.0 F)
1969	11.1 C (52.0 F)
1970	10.0 C (50.0 F)
1971	11.7 C (53.1 F)
1972	11.7 C (53.1 F)
1973	8.9 C (48.0 F)
1974	9.4 C (48.9 F)
1975	18.9 C (66.0 F)
1978	12.8 C (55.0 F)
1979	11.7 C (53.1 F)
1980	10.0 C (50.0 F)
1981	10.6 C (51.1 F)
1982	10.6 C (51.1 F)
1983	10.0 C (50.0 F)

Wettest day (Rx1day)

The wettest day of the year at Celestun (Smn), 1943 to 1983. The record is 183.4 mm (7.2 in) in 1955, marked on the chart; the median year is 79.0 mm (3.1 in).

Wettest day (Rx1day) at Celestun (Smn) by year
Year	Wettest day (Rx1day)
1943	33.3 mm (1.3 in)
1944	70.9 mm (2.8 in)
1945	42.9 mm (1.7 in)
1946	49.3 mm (1.9 in)
1947	45.0 mm (1.8 in)
1948	69.9 mm (2.8 in)
1949	79.8 mm (3.1 in)
1950	85.3 mm (3.4 in)
1951	48.8 mm (1.9 in)
1952	102.4 mm (4.0 in)
1953	29.0 mm (1.1 in)
1954	79.0 mm (3.1 in)
1955	183.4 mm (7.2 in)
1956	89.9 mm (3.5 in)
1957	101.3 mm (4.0 in)
1958	55.4 mm (2.2 in)
1959	57.9 mm (2.3 in)
1960	90.9 mm (3.6 in)
1961	65.8 mm (2.6 in)
1962	63.0 mm (2.5 in)
1963	121.9 mm (4.8 in)
1964	46.5 mm (1.8 in)
1965	109.0 mm (4.3 in)
1966	89.9 mm (3.5 in)
1967	99.8 mm (3.9 in)
1968	42.9 mm (1.7 in)
1969	79.8 mm (3.1 in)
1970	88.9 mm (3.5 in)
1971	47.8 mm (1.9 in)
1972	65.8 mm (2.6 in)
1973	100.3 mm (3.9 in)
1974	82.0 mm (3.2 in)
1975	100.1 mm (3.9 in)
1978	80.8 mm (3.2 in)
1979	47.0 mm (1.9 in)
1980	121.9 mm (4.8 in)
1981	107.2 mm (4.2 in)
1982	66.3 mm (2.6 in)
1983	73.9 mm (2.9 in)

Wettest five days (Rx5day)

The wettest five days of the year at Celestun (Smn), 1943 to 1983. The record is 236.0 mm (9.3 in) in 1974, marked on the chart; the median year is 109.8 mm (4.3 in).

Wettest five days (Rx5day) at Celestun (Smn) by year
Year	Wettest five days (Rx5day)
1943	69.8 mm (2.7 in)
1944	95.8 mm (3.8 in)
1945	72.7 mm (2.9 in)
1946	120.4 mm (4.7 in)
1947	132.6 mm (5.2 in)
1948	109.7 mm (4.3 in)
1949	89.9 mm (3.5 in)
1950	119.7 mm (4.7 in)
1951	75.4 mm (3.0 in)
1952	110.6 mm (4.4 in)
1953	52.3 mm (2.1 in)
1954	91.7 mm (3.6 in)
1955	219.5 mm (8.6 in)
1956	109.8 mm (4.3 in)
1957	115.0 mm (4.5 in)
1958	74.7 mm (2.9 in)
1959	139.2 mm (5.5 in)
1960	144.3 mm (5.7 in)
1961	90.5 mm (3.6 in)
1962	64.6 mm (2.5 in)
1963	167.6 mm (6.6 in)
1964	98.5 mm (3.9 in)
1965	182.5 mm (7.2 in)
1966	151.6 mm (6.0 in)
1967	144.8 mm (5.7 in)
1968	75.0 mm (3.0 in)
1969	128.5 mm (5.1 in)
1970	88.9 mm (3.5 in)
1971	91.5 mm (3.6 in)
1972	97.6 mm (3.8 in)
1973	112.0 mm (4.4 in)
1974	236.0 mm (9.3 in)
1975	187.0 mm (7.4 in)
1978	102.5 mm (4.0 in)
1979	92.4 mm (3.6 in)
1980	162.8 mm (6.4 in)
1981	118.7 mm (4.7 in)
1982	95.3 mm (3.8 in)
1983	141.5 mm (5.6 in)

Longest dry spell (CDD)

The longest dry spell of the year at Celestun (Smn), 1943 to 1983. The record is 146 days in 1950, marked on the chart; the median year is 65 days.

Longest dry spell (CDD) at Celestun (Smn) by year
Year	Longest dry spell (CDD)
1943	38 days
1944	118 days
1945	87 days
1946	110 days
1947	71 days
1948	41 days
1949	116 days
1950	146 days
1951	115 days
1952	65 days
1953	74 days
1954	42 days
1955	46 days
1956	45 days
1957	59 days
1958	51 days
1959	55 days
1960	106 days
1961	95 days
1962	81 days
1963	101 days
1964	47 days
1965	42 days
1966	67 days
1967	61 days
1968	119 days
1969	43 days
1970	121 days
1971	95 days
1972	78 days
1973	80 days
1974	31 days
1975	30 days
1978	45 days
1979	81 days
1980	56 days
1981	52 days
1982	52 days
1983	54 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

34 years, 1944 to 1983

A day with at least 75.1 mm (3.0 in) of rain is expected about once in 2 years. A day with at least 166.7 mm (6.6 in) of rain is expected about once in 100 years.

Rainfall return levels at Celestun (Smn): the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	75.1 mm (3.0 in)
5 years	102.2 mm (4.0 in)
10 years	119.1 mm (4.7 in)
25 years	139.2 mm (5.5 in)
50 years	153.3 mm (6.0 in)	Longer than the 34 years of record
100 years	166.7 mm (6.6 in)	Longer than the 34 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, 34 years of values from 1944 to 1983.

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: 183.4 mm (7.2 in) in 1955; 121.9 mm (4.8 in) in 1963; 121.9 mm (4.8 in) in 1980.

Download the Data

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