Rio Lajas Weather Records (MXN00011057)

Record envelope, standing records and threshold days for Rio Lajas (MXN00011057), Mexico, with 32 years of record.

Key Facts for Rio Lajas

Rio Lajas (MXN00011057) is a weather station in Mexico at 21.20 latitude and -100.92 longitude, 1,906 m (6,253 ft) above sea level.
The station reports from 1944 to 1975, 32 years of record.
1,464 records set at Rio Lajas still stand.
Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

Location: Mexico, 21.20 latitude, -100.92 longitude.
Elevation: 1,906 m (6,253 ft).
Period of record: 1944 to 1975, 32 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 Rio Lajas. 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 Rio Lajas, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	30.0 C (86.0 F)	-9.4 C (15.1 F)	n/a	n/a
Feb	36.7 C (98.1 F)	-9.4 C (15.1 F)	n/a	n/a
Mar	36.1 C (97.0 F)	-5.0 C (23.0 F)	n/a	n/a
Apr	38.3 C (100.9 F)	-1.1 C (30.0 F)	n/a	n/a
May	38.9 C (102.0 F)	0.6 C (33.1 F)	n/a	n/a
Jun	37.8 C (100.0 F)	0.0 C (32.0 F)	n/a	n/a
Jul	37.2 C (99.0 F)	2.8 C (37.0 F)	n/a	n/a
Aug	37.2 C (99.0 F)	2.8 C (37.0 F)	n/a	n/a
Sep	38.3 C (100.9 F)	-3.3 C (26.1 F)	n/a	n/a
Oct	35.0 C (95.0 F)	-2.2 C (28.0 F)	n/a	n/a
Nov	36.7 C (98.1 F)	-10.6 C (12.9 F)	n/a	n/a
Dec	33.9 C (93.0 F)	-9.4 C (15.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Rio Lajas still stand. 1974 holds the most, with 190.

Standing records at Rio Lajas by the year they were set
Year set	Standing records
1944	65
1945	54
1946	47
1947	54
1948	109
1949	77
1950	102
1951	70
1952	64
1953	92
1954	30
1955	32
1956	46
1957	14
1958	53
1959	37
1960	14
1962	9
1963	17
1964	27
1965	23
1966	26
1967	28
1968	26
1970	18
1971	16
1972	6
1973	19
1974	190
1975	99

Wettest Day of Each Month

Jul: 103.9 mm (4.1 in)

The wettest day on record for each calendar month at Rio Lajas. The most was 103.9 mm (4.1 in) on 4 July 1944.

Record daily precipitation for each month at Rio Lajas
Month	Record daily precipitation (mm)	Date
Jan	24.9 mm (1.0 in)	4 January 1948
Feb	27.2 mm (1.1 in)	20 February 1958
Mar	40.9 mm (1.6 in)	3 March 1968
Apr	62.0 mm (2.4 in)	12 April 1946
May	47.8 mm (1.9 in)	25 May 1964
Jun	64.8 mm (2.6 in)	19 June 1975
Jul	103.9 mm (4.1 in)	4 July 1944
Aug	89.9 mm (3.5 in)	18 August 1974
Sep	79.8 mm (3.1 in)	13 September 1974
Oct	47.0 mm (1.9 in)	15 October 1955
Nov	74.9 mm (2.9 in)	5 November 1974
Dec	31.0 mm (1.2 in)	25 December 1947

Period of Record Coverage

1944 to 1975

30 years of record at Rio Lajas, 1944 to 1975. 5 years have data for under 90 percent of days and are left out of rankings: 1944, 1957, 1972, 1973, 1975.

Days with data per year at Rio Lajas
Year	Days with data	Share of year	Complete
1944	231	63%	No
1945	365	100%	Yes
1946	334	92%	Yes
1947	365	100%	Yes
1948	366	100%	Yes
1949	362	99%	Yes
1950	365	100%	Yes
1951	362	99%	Yes
1952	365	100%	Yes
1953	365	100%	Yes
1954	364	100%	Yes
1955	365	100%	Yes
1956	334	91%	Yes
1957	196	54%	No
1958	365	100%	Yes
1959	365	100%	Yes
1960	366	100%	Yes
1962	365	100%	Yes
1963	365	100%	Yes
1964	366	100%	Yes
1965	334	92%	Yes
1966	365	100%	Yes
1967	365	100%	Yes
1968	364	99%	Yes
1970	364	100%	Yes
1971	365	100%	Yes
1972	152	42%	No
1973	20	5%	No
1974	365	100%	Yes
1975	270	74%	No

Latest Records

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

Climate Trend

22 complete years, 1945 to 1974

One stripe for each of 22 complete years at Rio Lajas, 1945 to 1974. Blue stripes are years cooler than the station's own mean of 17.4 C (63.4 F); red stripes are warmer. The coolest year was 1974, at 12.8 C (55.0 F), and the warmest was 1948, at 19.3 C (66.8 F). The strongest colour marks a difference of 4.7 C (8.5 F).

Annual mean temperature at Rio Lajas as warming stripes, 1945 to 1974
Year	Annual mean temperature	Difference from the station mean
1945	17.9 C	+0.49 C
1947	18.9 C	+1.45 C
1948	19.3 C	+1.88 C
1949	19.0 C	+1.58 C
1950	18.2 C	+0.75 C
1951	17.4 C	-0.05 C
1952	18.7 C	+1.23 C
1953	19.1 C	+1.63 C
1954	17.3 C	-0.09 C
1955	17.0 C	-0.47 C
1958	16.4 C	-1.07 C
1959	16.6 C	-0.86 C
1960	17.3 C	-0.14 C
1962	17.3 C	-0.09 C
1963	17.2 C	-0.22 C
1964	17.7 C	+0.31 C
1966	16.5 C	-0.92 C
1967	17.1 C	-0.31 C
1968	17.6 C	+0.16 C
1970	17.3 C	-0.10 C
1971	17.0 C	-0.44 C
1974	12.8 C	-4.65 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

1944 to 1975

Yearly extremes at Rio Lajas: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	38.9 C (102.0 F)	1967	35.0 C (95.0 F)	30
Coldest night (TNn)	-10.6 C (12.9 F)	1974	-3.6 C (25.5 F)	30
Wettest day (Rx1day)	103.9 mm (4.1 in)	1944	43.4 mm (1.7 in)	30
Wettest five days (Rx5day)	159.8 mm (6.3 in)	1974	82.9 mm (3.3 in)	30
Longest dry spell (CDD)	144 days	1950	73 days	30

Hottest day (TXx)

The hottest day of the year at Rio Lajas, 1944 to 1975. The record is 38.9 C (102.0 F) in 1967, marked on the chart; the median year is 35.0 C (95.0 F).

Hottest day (TXx) at Rio Lajas by year
Year	Hottest day (TXx)
1944	33.9 C (93.0 F)
1945	38.3 C (100.9 F)
1946	35.6 C (96.1 F)
1947	36.1 C (97.0 F)
1948	35.6 C (96.1 F)
1949	35.0 C (95.0 F)
1950	37.2 C (99.0 F)
1951	36.7 C (98.1 F)
1952	36.7 C (98.1 F)
1953	38.3 C (100.9 F)
1954	34.4 C (93.9 F)
1955	32.8 C (91.0 F)
1956	32.2 C (90.0 F)
1957	30.6 C (87.1 F)
1958	35.0 C (95.0 F)
1959	35.0 C (95.0 F)
1960	33.9 C (93.0 F)
1962	35.6 C (96.1 F)
1963	34.4 C (93.9 F)
1964	34.4 C (93.9 F)
1965	35.0 C (95.0 F)
1966	36.7 C (98.1 F)
1967	38.9 C (102.0 F)
1968	36.7 C (98.1 F)
1970	35.6 C (96.1 F)
1971	35.0 C (95.0 F)
1972	35.0 C (95.0 F)
1973	21.7 C (71.1 F)
1974	31.7 C (89.1 F)
1975	31.7 C (89.1 F)

Coldest night (TNn)

The coldest night of the year at Rio Lajas, 1944 to 1975. The record is -10.6 C (12.9 F) in 1974, marked on the chart; the median year is -3.6 C (25.5 F).

Coldest night (TNn) at Rio Lajas by year
Year	Coldest night (TNn)
1944	-5.0 C (23.0 F)
1945	-4.4 C (24.1 F)
1946	0.6 C (33.1 F)
1947	-2.8 C (27.0 F)
1948	1.7 C (35.1 F)
1949	-6.1 C (21.0 F)
1950	-4.4 C (24.1 F)
1951	-4.4 C (24.1 F)
1952	-7.8 C (18.0 F)
1953	-1.7 C (28.9 F)
1954	-4.4 C (24.1 F)
1955	-8.3 C (17.1 F)
1956	-7.8 C (18.0 F)
1957	0.0 C (32.0 F)
1958	0.0 C (32.0 F)
1959	0.0 C (32.0 F)
1960	0.0 C (32.0 F)
1962	-0.6 C (30.9 F)
1963	-3.9 C (25.0 F)
1964	-0.6 C (30.9 F)
1965	-0.6 C (30.9 F)
1966	-4.4 C (24.1 F)
1967	-3.3 C (26.1 F)
1968	-1.1 C (30.0 F)
1970	0.0 C (32.0 F)
1971	-4.4 C (24.1 F)
1972	0.0 C (32.0 F)
1973	-9.4 C (15.1 F)
1974	-10.6 C (12.9 F)
1975	-9.4 C (15.1 F)

Wettest day (Rx1day)

The wettest day of the year at Rio Lajas, 1944 to 1975. The record is 103.9 mm (4.1 in) in 1944, marked on the chart; the median year is 43.4 mm (1.7 in).

Wettest day (Rx1day) at Rio Lajas by year
Year	Wettest day (Rx1day)
1944	103.9 mm (4.1 in)
1945	27.9 mm (1.1 in)
1946	62.0 mm (2.4 in)
1947	49.8 mm (2.0 in)
1948	46.0 mm (1.8 in)
1949	39.4 mm (1.6 in)
1950	30.5 mm (1.2 in)
1951	53.8 mm (2.1 in)
1952	42.9 mm (1.7 in)
1953	34.0 mm (1.3 in)
1954	61.0 mm (2.4 in)
1955	47.0 mm (1.9 in)
1956	67.8 mm (2.7 in)
1957	31.0 mm (1.2 in)
1958	29.0 mm (1.1 in)
1959	20.8 mm (0.8 in)
1960	43.9 mm (1.7 in)
1962	39.9 mm (1.6 in)
1963	45.0 mm (1.8 in)
1964	63.5 mm (2.5 in)
1965	35.3 mm (1.4 in)
1966	53.8 mm (2.1 in)
1967	14.0 mm (0.6 in)
1968	40.9 mm (1.6 in)
1970	49.8 mm (2.0 in)
1971	42.9 mm (1.7 in)
1972	35.3 mm (1.4 in)
1973	0.0 mm (0.00 in)
1974	89.9 mm (3.5 in)
1975	64.8 mm (2.6 in)

Wettest five days (Rx5day)

The wettest five days of the year at Rio Lajas, 1944 to 1975. The record is 159.8 mm (6.3 in) in 1974, marked on the chart; the median year is 82.9 mm (3.3 in).

Wettest five days (Rx5day) at Rio Lajas by year
Year	Wettest five days (Rx5day)
1944	115.6 mm (4.6 in)
1945	61.5 mm (2.4 in)
1946	90.4 mm (3.6 in)
1947	143.8 mm (5.7 in)
1948	121.2 mm (4.8 in)
1949	82.6 mm (3.3 in)
1950	76.4 mm (3.0 in)
1951	120.0 mm (4.7 in)
1952	110.5 mm (4.4 in)
1953	107.7 mm (4.2 in)
1954	78.0 mm (3.1 in)
1955	92.5 mm (3.6 in)
1956	118.2 mm (4.7 in)
1957	57.7 mm (2.3 in)
1958	64.3 mm (2.5 in)
1959	74.9 mm (2.9 in)
1960	58.7 mm (2.3 in)
1962	75.4 mm (3.0 in)
1963	65.5 mm (2.6 in)
1964	98.6 mm (3.9 in)
1965	68.6 mm (2.7 in)
1966	78.7 mm (3.1 in)
1967	29.7 mm (1.2 in)
1968	77.5 mm (3.1 in)
1970	108.2 mm (4.3 in)
1971	133.3 mm (5.2 in)
1972	83.1 mm (3.3 in)
1973	0.0 mm (0.00 in)
1974	159.8 mm (6.3 in)
1975	96.3 mm (3.8 in)

Longest dry spell (CDD)

The longest dry spell of the year at Rio Lajas, 1944 to 1975. The record is 144 days in 1950, marked on the chart; the median year is 73 days.

Longest dry spell (CDD) at Rio Lajas by year
Year	Longest dry spell (CDD)
1944	40 days
1945	82 days
1946	36 days
1947	104 days
1948	101 days
1949	124 days
1950	144 days
1951	72 days
1952	61 days
1953	97 days
1954	52 days
1955	83 days
1956	82 days
1957	68 days
1958	74 days
1959	101 days
1960	101 days
1962	71 days
1963	58 days
1964	63 days
1965	44 days
1966	56 days
1967	77 days
1968	55 days
1970	116 days
1971	121 days
1972	53 days
1973	22 days
1974	45 days
1975	99 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 Rio Lajas standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Rio Lajas 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).