Altamira (Smn) Weather Records (MXN00028004)

Record envelope, standing records and threshold days for Altamira (Smn) (MXN00028004), Mexico, with 30 years of record.

Key Facts for Altamira (Smn)

Altamira (Smn) (MXN00028004) is a weather station in Mexico at 22.40 latitude and -97.93 longitude, 17 m (55 ft) above sea level.
The station reports from 1961 to 1990, 30 years of record.
1,464 records set at Altamira (Smn) still stand.
Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

Location: Mexico, 22.40 latitude, -97.93 longitude.
Elevation: 17 m (55 ft).
Period of record: 1961 to 1990, 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 Altamira (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 Altamira (Smn), with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	33.9 C (93.0 F)	0.6 C (33.1 F)	n/a	n/a
Feb	36.7 C (98.1 F)	2.2 C (36.0 F)	n/a	n/a
Mar	40.6 C (105.1 F)	6.7 C (44.1 F)	n/a	n/a
Apr	40.0 C (104.0 F)	8.9 C (48.0 F)	n/a	n/a
May	44.4 C (111.9 F)	15.6 C (60.1 F)	n/a	n/a
Jun	40.6 C (105.1 F)	18.9 C (66.0 F)	n/a	n/a
Jul	37.8 C (100.0 F)	18.9 C (66.0 F)	n/a	n/a
Aug	36.7 C (98.1 F)	20.0 C (68.0 F)	n/a	n/a
Sep	36.7 C (98.1 F)	11.7 C (53.1 F)	n/a	n/a
Oct	35.0 C (95.0 F)	6.1 C (43.0 F)	n/a	n/a
Nov	37.8 C (100.0 F)	6.7 C (44.1 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 Altamira (Smn) still stand. 1964 holds the most, with 127.

Standing records at Altamira (Smn) by the year they were set
Year set	Standing records
1961	106
1962	126
1963	85
1964	127
1965	93
1966	76
1967	94
1968	76
1969	73
1970	100
1971	92
1972	32
1983	20
1984	103
1985	52
1986	61
1987	6
1989	71
1990	71

Wettest Day of Each Month

Sep: 197.9 mm (7.8 in)

The wettest day on record for each calendar month at Altamira (Smn). The most was 197.9 mm (7.8 in) on 7 September 1969.

Record daily precipitation for each month at Altamira (Smn)
Month	Record daily precipitation (mm)	Date
Jan	19.8 mm (0.8 in)	11 January 1968
Feb	45.0 mm (1.8 in)	21 February 1966
Mar	40.9 mm (1.6 in)	23 March 1967
Apr	24.4 mm (1.0 in)	8 April 1985
May	66.3 mm (2.6 in)	2 May 1985
Jun	161.8 mm (6.4 in)	26 June 1970
Jul	95.0 mm (3.7 in)	23 July 1985
Aug	116.8 mm (4.6 in)	31 August 1969
Sep	197.9 mm (7.8 in)	7 September 1969
Oct	66.8 mm (2.6 in)	4 October 1970
Nov	83.8 mm (3.3 in)	24 November 1962
Dec	35.8 mm (1.4 in)	1 December 1965

Period of Record Coverage

1961 to 1990

19 years of record at Altamira (Smn), 1961 to 1990. 6 years have data for under 90 percent of days and are left out of rankings: 1969, 1972, 1983, 1985, 1987, 1990.

Days with data per year at Altamira (Smn)
Year	Days with data	Share of year	Complete
1961	330	90%	Yes
1962	331	91%	Yes
1963	364	100%	Yes
1964	362	99%	Yes
1965	329	90%	Yes
1966	362	99%	Yes
1967	363	99%	Yes
1968	363	99%	Yes
1969	289	79%	No
1970	364	100%	Yes
1971	361	99%	Yes
1972	119	33%	No
1983	28	8%	No
1984	342	93%	Yes
1985	308	84%	No
1986	341	93%	Yes
1987	28	8%	No
1989	335	92%	Yes
1990	328	90%	No

Latest Records

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

Climate Trend

10 complete years, 1963 to 1989

One stripe for each of 10 complete years at Altamira (Smn), 1963 to 1989. Blue stripes are years cooler than the station's own mean of 23.9 C (75.1 F); red stripes are warmer. The coolest year was 1966, at 23.4 C (74.0 F), and the warmest was 1971, at 25.2 C (77.3 F). The strongest colour marks a difference of 1.3 C (2.3 F).

Annual mean temperature at Altamira (Smn) as warming stripes, 1963 to 1989
Year	Annual mean temperature	Difference from the station mean
1963	23.9 C	-0.04 C
1964	24.3 C	+0.41 C
1966	23.4 C	-0.57 C
1967	23.9 C	-0.07 C
1968	23.9 C	-0.08 C
1970	23.9 C	0.00 C
1971	25.2 C	+1.25 C
1984	23.4 C	-0.49 C
1986	24.0 C	+0.07 C
1989	23.5 C	-0.45 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

1961 to 1990

Yearly extremes at Altamira (Smn): 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)	1984	37.8 C (100.0 F)	19
Coldest night (TNn)	0.0 C (32.0 F)	1983	5.0 C (41.0 F)	19
Wettest day (Rx1day)	197.9 mm (7.8 in)	1969	63.0 mm (2.5 in)	19
Wettest five days (Rx5day)	462.3 mm (18.2 in)	1967	118.6 mm (4.7 in)	19
Longest dry spell (CDD)	90 days	1962	44 days	19

Hottest day (TXx)

The hottest day of the year at Altamira (Smn), 1961 to 1990. The record is 44.4 C (111.9 F) in 1984, marked on the chart; the median year is 37.8 C (100.0 F).

Hottest day (TXx) at Altamira (Smn) by year
Year	Hottest day (TXx)
1961	36.7 C (98.1 F)
1962	40.0 C (104.0 F)
1963	35.6 C (96.1 F)
1964	38.9 C (102.0 F)
1965	37.8 C (100.0 F)
1966	37.8 C (100.0 F)
1967	41.7 C (107.1 F)
1968	36.7 C (98.1 F)
1969	37.8 C (100.0 F)
1970	36.7 C (98.1 F)
1971	36.7 C (98.1 F)
1972	36.7 C (98.1 F)
1983	32.8 C (91.0 F)
1984	44.4 C (111.9 F)
1985	39.4 C (102.9 F)
1986	39.4 C (102.9 F)
1987	35.0 C (95.0 F)
1989	38.3 C (100.9 F)
1990	36.7 C (98.1 F)

Coldest night (TNn)

The coldest night of the year at Altamira (Smn), 1961 to 1990. The record is 0.0 C (32.0 F) in 1983, marked on the chart; the median year is 5.0 C (41.0 F).

Coldest night (TNn) at Altamira (Smn) by year
Year	Coldest night (TNn)
1961	6.7 C (44.1 F)
1962	0.6 C (33.1 F)
1963	0.6 C (33.1 F)
1964	5.0 C (41.0 F)
1965	8.9 C (48.0 F)
1966	5.6 C (42.1 F)
1967	3.9 C (39.0 F)
1968	5.0 C (41.0 F)
1969	7.8 C (46.0 F)
1970	5.6 C (42.1 F)
1971	6.7 C (44.1 F)
1972	6.7 C (44.1 F)
1983	0.0 C (32.0 F)
1984	0.6 C (33.1 F)
1985	1.7 C (35.1 F)
1986	4.4 C (39.9 F)
1987	7.8 C (46.0 F)
1989	1.1 C (34.0 F)
1990	0.0 C (32.0 F)

Wettest day (Rx1day)

The wettest day of the year at Altamira (Smn), 1961 to 1990. The record is 197.9 mm (7.8 in) in 1969, marked on the chart; the median year is 63.0 mm (2.5 in).

Wettest day (Rx1day) at Altamira (Smn) by year
Year	Wettest day (Rx1day)
1961	48.8 mm (1.9 in)
1962	83.8 mm (3.3 in)
1963	52.6 mm (2.1 in)
1964	63.0 mm (2.5 in)
1965	40.9 mm (1.6 in)
1966	87.4 mm (3.4 in)
1967	179.8 mm (7.1 in)
1968	56.9 mm (2.2 in)
1969	197.9 mm (7.8 in)
1970	161.8 mm (6.4 in)
1971	81.8 mm (3.2 in)
1972	7.6 mm (0.30 in)
1983	2.8 mm (0.11 in)
1984	68.1 mm (2.7 in)
1985	95.0 mm (3.7 in)
1986	59.9 mm (2.4 in)
1987	22.6 mm (0.9 in)
1989	86.4 mm (3.4 in)
1990	50.8 mm (2.0 in)

Wettest five days (Rx5day)

The wettest five days of the year at Altamira (Smn), 1961 to 1990. The record is 462.3 mm (18.2 in) in 1967, marked on the chart; the median year is 118.6 mm (4.7 in).

Wettest five days (Rx5day) at Altamira (Smn) by year
Year	Wettest five days (Rx5day)
1961	108.1 mm (4.3 in)
1962	202.4 mm (8.0 in)
1963	84.9 mm (3.3 in)
1964	133.8 mm (5.3 in)
1965	105.8 mm (4.2 in)
1966	237.0 mm (9.3 in)
1967	462.3 mm (18.2 in)
1968	118.4 mm (4.7 in)
1969	287.0 mm (11.3 in)
1970	326.5 mm (12.9 in)
1971	178.4 mm (7.0 in)
1972	42.4 mm (1.7 in)
1983	2.8 mm (0.11 in)
1984	192.0 mm (7.6 in)
1985	118.6 mm (4.7 in)
1986	86.6 mm (3.4 in)
1987	22.6 mm (0.9 in)
1989	197.7 mm (7.8 in)
1990	74.0 mm (2.9 in)

Longest dry spell (CDD)

The longest dry spell of the year at Altamira (Smn), 1961 to 1990. The record is 90 days in 1962, marked on the chart; the median year is 44 days.

Longest dry spell (CDD) at Altamira (Smn) by year
Year	Longest dry spell (CDD)
1961	68 days
1962	90 days
1963	41 days
1964	54 days
1965	60 days
1966	42 days
1967	46 days
1968	33 days
1969	42 days
1970	74 days
1971	44 days
1972	77 days
1983	9 days
1984	63 days
1985	31 days
1986	42 days
1987	8 days
1989	44 days
1990	57 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 Altamira (Smn) standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Altamira (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 2026-10-15 (15 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).