Almoloya del Rio (Smn) Weather Records (MXN00015176)

Record envelope, standing records and threshold days for Almoloya del Rio (Smn) (MXN00015176), Mexico, with 51 years of record.

Key Facts for Almoloya del Rio (Smn)

Almoloya del Rio (Smn) (MXN00015176) is a weather station in Mexico at 19.17 latitude and -99.50 longitude, 2,622 m (8,602 ft) above sea level.
The station reports from 1938 to 1988, 51 years of record.
1,464 records set at Almoloya del Rio (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, 19.17 latitude, -99.50 longitude.
Elevation: 2,622 m (8,602 ft).
Period of record: 1938 to 1988, 51 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 Almoloya del Rio (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 Almoloya del Rio (Smn), with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	23.9 C (75.0 F)	-10.0 C (14.0 F)	n/a	n/a
Feb	27.2 C (81.0 F)	-5.0 C (23.0 F)	n/a	n/a
Mar	27.2 C (81.0 F)	-9.4 C (15.1 F)	n/a	n/a
Apr	28.9 C (84.0 F)	-6.1 C (21.0 F)	n/a	n/a
May	28.9 C (84.0 F)	0.6 C (33.1 F)	n/a	n/a
Jun	27.8 C (82.0 F)	0.6 C (33.1 F)	n/a	n/a
Jul	23.9 C (75.0 F)	0.6 C (33.1 F)	n/a	n/a
Aug	23.9 C (75.0 F)	2.8 C (37.0 F)	n/a	n/a
Sep	22.8 C (73.0 F)	-2.2 C (28.0 F)	n/a	n/a
Oct	23.9 C (75.0 F)	-6.1 C (21.0 F)	n/a	n/a
Nov	25.0 C (77.0 F)	-8.3 C (17.1 F)	n/a	n/a
Dec	23.9 C (75.0 F)	-10.6 C (12.9 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Almoloya del Rio (Smn) still stand. 1944 holds the most, with 167.

Standing records at Almoloya del Rio (Smn) by the year they were set
Year set	Standing records
1938	98
1939	137
1942	87
1943	71
1944	167
1945	48
1946	57
1947	53
1948	39
1949	66
1950	50
1954	31
1961	88
1962	74
1963	62
1964	108
1965	119
1966	51
1967	10
1968	23
1969	15
1974	3
1975	3
1988	4

Wettest Day of Each Month

Apr: 190.0 mm (7.5 in)

The wettest day on record for each calendar month at Almoloya del Rio (Smn). The most was 190.0 mm (7.5 in) on 20 April 1950.

Record daily precipitation for each month at Almoloya del Rio (Smn)
Month	Record daily precipitation (mm)	Date
Jan	49.8 mm (2.0 in)	7 January 1950
Feb	59.9 mm (2.4 in)	16 February 1950
Mar	89.9 mm (3.5 in)	13 March 1950
Apr	190.0 mm (7.5 in)	20 April 1950
May	184.9 mm (7.3 in)	5 May 1944
Jun	170.4 mm (6.7 in)	23 June 1950
Jul	125.0 mm (4.9 in)	26 July 1944
Aug	140.0 mm (5.5 in)	16 August 1950
Sep	119.9 mm (4.7 in)	24 September 1950
Oct	89.9 mm (3.5 in)	8 October 1950
Nov	27.9 mm (1.1 in)	28 November 1942
Dec	11.9 mm (0.5 in)	13 December 1947

Period of Record Coverage

1938 to 1988

24 years of record at Almoloya del Rio (Smn), 1938 to 1988. 16 years have data for under 90 percent of days and are left out of rankings: 1938, 1939, 1943, 1945, 1946, 1947, 1948, 1954 and others.

Days with data per year at Almoloya del Rio (Smn)
Year	Days with data	Share of year	Complete
1938	164	45%	No
1939	273	75%	No
1942	364	100%	Yes
1943	244	67%	No
1944	334	91%	Yes
1945	154	42%	No
1946	211	58%	No
1947	123	34%	No
1948	123	34%	No
1949	337	92%	Yes
1950	365	100%	Yes
1954	31	8%	No
1961	364	100%	Yes
1962	363	99%	Yes
1963	364	100%	Yes
1964	366	100%	Yes
1965	181	50%	No
1966	91	25%	No
1967	62	17%	No
1968	208	57%	No
1969	30	8%	No
1974	33	9%	No
1975	17	5%	No
1988	11	3%	No

Latest Records

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

Extremes by Year

1938 to 1988

Yearly extremes at Almoloya del Rio (Smn): the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	28.9 C (84.0 F)	1961	25.6 C (78.1 F)	24
Coldest night (TNn)	-10.6 C (12.9 F)	1938	-2.7 C (27.1 F)	24
Wettest day (Rx1day)	190.0 mm (7.5 in)	1950	30.3 mm (1.2 in)	24
Wettest five days (Rx5day)	469.5 mm (18.5 in)	1950	71.6 mm (2.8 in)	24
Longest dry spell (CDD)	125 days	1944	37 days	24

Hottest day (TXx)

The hottest day of the year at Almoloya del Rio (Smn), 1938 to 1988. The record is 28.9 C (84.0 F) in 1961, marked on the chart; the median year is 25.6 C (78.1 F).

Hottest day (TXx) at Almoloya del Rio (Smn) by year
Year	Hottest day (TXx)
1938	22.8 C (73.0 F)
1939	23.9 C (75.0 F)
1942	27.8 C (82.0 F)
1943	27.2 C (81.0 F)
1944	28.3 C (82.9 F)
1945	25.0 C (77.0 F)
1946	25.6 C (78.1 F)
1947	23.9 C (75.0 F)
1948	26.7 C (80.1 F)
1949	25.6 C (78.1 F)
1950	25.6 C (78.1 F)
1954	23.3 C (73.9 F)
1961	28.9 C (84.0 F)
1962	25.6 C (78.1 F)
1963	28.9 C (84.0 F)
1964	26.7 C (80.1 F)
1965	27.8 C (82.0 F)
1966	23.9 C (75.0 F)
1967	21.7 C (71.1 F)
1968	27.8 C (82.0 F)
1969	25.6 C (78.1 F)
1974	21.7 C (71.1 F)
1975	18.9 C (66.0 F)
1988	19.4 C (66.9 F)

Coldest night (TNn)

The coldest night of the year at Almoloya del Rio (Smn), 1938 to 1988. The record is -10.6 C (12.9 F) in 1938, marked on the chart; the median year is -2.7 C (27.1 F).

Coldest night (TNn) at Almoloya del Rio (Smn) by year
Year	Coldest night (TNn)
1938	-10.6 C (12.9 F)
1939	-10.0 C (14.0 F)
1942	-5.0 C (23.0 F)
1943	-5.6 C (21.9 F)
1944	-6.7 C (19.9 F)
1945	0.6 C (33.1 F)
1946	-6.1 C (21.0 F)
1947	-1.1 C (30.0 F)
1948	-2.2 C (28.0 F)
1949	-3.3 C (26.1 F)
1950	-5.0 C (23.0 F)
1954	8.9 C (48.0 F)
1961	-4.4 C (24.1 F)
1962	-2.2 C (28.0 F)
1963	-8.3 C (17.1 F)
1964	-9.4 C (15.1 F)
1965	0.0 C (32.0 F)
1966	6.7 C (44.1 F)
1967	5.0 C (41.0 F)
1968	0.0 C (32.0 F)
1969	5.0 C (41.0 F)
1974	-0.6 C (30.9 F)
1975	5.6 C (42.1 F)
1988	-6.7 C (19.9 F)

Wettest day (Rx1day)

The wettest day of the year at Almoloya del Rio (Smn), 1938 to 1988. The record is 190.0 mm (7.5 in) in 1950, marked on the chart; the median year is 30.3 mm (1.2 in).

Wettest day (Rx1day) at Almoloya del Rio (Smn) by year
Year	Wettest day (Rx1day)
1938	18.8 mm (0.7 in)
1939	32.8 mm (1.3 in)
1942	27.9 mm (1.1 in)
1943	26.4 mm (1.0 in)
1944	184.9 mm (7.3 in)
1945	112.3 mm (4.4 in)
1946	16.8 mm (0.7 in)
1947	16.8 mm (0.7 in)
1948	16.8 mm (0.7 in)
1949	100.3 mm (3.9 in)
1950	190.0 mm (7.5 in)
1954	34.8 mm (1.4 in)
1961	50.8 mm (2.0 in)
1962	71.9 mm (2.8 in)
1963	37.8 mm (1.5 in)
1964	35.8 mm (1.4 in)
1965	23.9 mm (0.9 in)
1966	26.9 mm (1.1 in)
1967	32.8 mm (1.3 in)
1968	31.5 mm (1.2 in)
1969	21.8 mm (0.9 in)
1974	0.0 mm (0.00 in)
1975	29.0 mm (1.1 in)
1988	0.0 mm (0.00 in)

Wettest five days (Rx5day)

The wettest five days of the year at Almoloya del Rio (Smn), 1938 to 1988. The record is 469.5 mm (18.5 in) in 1950, marked on the chart; the median year is 71.6 mm (2.8 in).

Wettest five days (Rx5day) at Almoloya del Rio (Smn) by year
Year	Wettest five days (Rx5day)
1938	73.8 mm (2.9 in)
1939	82.9 mm (3.3 in)
1942	61.5 mm (2.4 in)
1943	73.2 mm (2.9 in)
1944	249.7 mm (9.8 in)
1945	170.2 mm (6.7 in)
1946	39.4 mm (1.6 in)
1947	33.3 mm (1.3 in)
1948	34.2 mm (1.3 in)
1949	339.9 mm (13.4 in)
1950	469.5 mm (18.5 in)
1954	53.4 mm (2.1 in)
1961	151.8 mm (6.0 in)
1962	97.0 mm (3.8 in)
1963	72.7 mm (2.9 in)
1964	97.0 mm (3.8 in)
1965	53.3 mm (2.1 in)
1966	70.5 mm (2.8 in)
1967	73.4 mm (2.9 in)
1968	60.1 mm (2.4 in)
1969	67.5 mm (2.7 in)
1974	0.0 mm (0.00 in)
1975	53.9 mm (2.1 in)
1988	0.0 mm (0.00 in)

Longest dry spell (CDD)

The longest dry spell of the year at Almoloya del Rio (Smn), 1938 to 1988. The record is 125 days in 1944, marked on the chart; the median year is 37 days.

Longest dry spell (CDD) at Almoloya del Rio (Smn) by year
Year	Longest dry spell (CDD)
1938	23 days
1939	30 days
1942	57 days
1943	86 days
1944	125 days
1945	35 days
1946	48 days
1947	123 days
1948	71 days
1949	71 days
1950	39 days
1954	11 days
1961	32 days
1962	101 days
1963	63 days
1964	94 days
1965	77 days
1966	12 days
1967	4 days
1968	28 days
1969	8 days
1974	13 days
1975	1 day
1988	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.

Download the Data

Data for Almoloya del Rio (Smn) standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Almoloya del Rio (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 2026-10-12 (12 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).