C.A.E. Llera Weather Records (MXN00028056)

Record envelope, standing records and threshold days for C.A.E. Llera (MXN00028056), Mexico, with 37 years of record.

Key Facts for C.A.E. Llera

C.A.E. Llera (MXN00028056) is a weather station in Mexico at 23.32 latitude and -99.02 longitude, 270 m (885 ft) above sea level.
The station reports from 1941 to 1977, 37 years of record.
1,464 records set at C.A.E. Llera still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
C.A.E. Llera set a daily record precipitation of 19.8 mm (0.8 in) on 31 July 1977.

About the Station

Location: Mexico, 23.32 latitude, -99.02 longitude.
Elevation: 270 m (885 ft).
Period of record: 1941 to 1977, 37 years.
Eligible elements: tmax, tmin, 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 C.A.E. Llera. 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 C.A.E. Llera, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	41.7 C (107.1 F)	-2.8 C (27.0 F)	n/a	n/a
Feb	45.0 C (113.0 F)	-2.2 C (28.0 F)	n/a	n/a
Mar	45.0 C (113.0 F)	-2.2 C (28.0 F)	n/a	n/a
Apr	46.7 C (116.1 F)	6.7 C (44.1 F)	n/a	n/a
May	48.3 C (118.9 F)	10.0 C (50.0 F)	n/a	n/a
Jun	46.7 C (116.1 F)	10.0 C (50.0 F)	n/a	n/a
Jul	42.8 C (109.0 F)	10.0 C (50.0 F)	n/a	n/a
Aug	43.3 C (109.9 F)	10.0 C (50.0 F)	n/a	n/a
Sep	42.2 C (108.0 F)	8.9 C (48.0 F)	n/a	n/a
Oct	40.6 C (105.1 F)	8.9 C (48.0 F)	n/a	n/a
Nov	42.8 C (109.0 F)	-4.4 C (24.1 F)	n/a	n/a
Dec	40.6 C (105.1 F)	-5.0 C (23.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at C.A.E. Llera still stand. 1957 holds the most, with 169.

Standing records at C.A.E. Llera by the year they were set
Year set	Standing records
1941	3
1942	10
1943	14
1944	11
1945	11
1946	53
1947	27
1948	15
1949	20
1950	23
1951	25
1952	23
1953	39
1954	9
1955	19
1956	47
1957	169
1958	104
1959	108
1960	102
1961	11
1962	37
1963	28
1964	12
1965	17
1966	25
1967	15
1968	23
1969	16
1970	23
1971	25
1972	9
1973	81
1974	76
1975	34
1976	157
1977	43

Wettest Day of Each Month

Oct: 225.3 mm (8.9 in)

The wettest day on record for each calendar month at C.A.E. Llera. The most was 225.3 mm (8.9 in) on 10 October 1966.

Record daily precipitation for each month at C.A.E. Llera
Month	Record daily precipitation (mm)	Date
Jan	43.9 mm (1.7 in)	22 January 1974
Feb	119.9 mm (4.7 in)	20 February 1958
Mar	91.9 mm (3.6 in)	23 March 1961
Apr	103.9 mm (4.1 in)	17 April 1950
May	86.9 mm (3.4 in)	15 May 1956
Jun	99.3 mm (3.9 in)	26 June 1962
Jul	110.0 mm (4.3 in)	21 July 1972
Aug	133.4 mm (5.3 in)	30 August 1944
Sep	192.8 mm (7.6 in)	12 September 1970
Oct	225.3 mm (8.9 in)	10 October 1966
Nov	89.9 mm (3.5 in)	25 November 1976
Dec	26.4 mm (1.0 in)	15 December 1947

Period of Record Coverage

1941 to 1977

37 years of record at C.A.E. Llera, 1941 to 1977. 3 years have data for under 90 percent of days and are left out of rankings: 1941, 1942, 1977.

Days with data per year at C.A.E. Llera
Year	Days with data	Share of year	Complete
1941	29	8%	No
1942	210	58%	No
1943	331	91%	Yes
1944	335	92%	Yes
1945	361	99%	Yes
1946	361	99%	Yes
1947	361	99%	Yes
1948	360	98%	Yes
1949	364	100%	Yes
1950	365	100%	Yes
1951	363	99%	Yes
1952	365	100%	Yes
1953	363	99%	Yes
1954	361	99%	Yes
1955	361	99%	Yes
1956	364	99%	Yes
1957	362	99%	Yes
1958	359	98%	Yes
1959	359	98%	Yes
1960	361	99%	Yes
1961	360	99%	Yes
1962	360	99%	Yes
1963	362	99%	Yes
1964	365	100%	Yes
1965	360	99%	Yes
1966	355	97%	Yes
1967	354	97%	Yes
1968	360	98%	Yes
1969	344	94%	Yes
1970	361	99%	Yes
1971	361	99%	Yes
1972	362	99%	Yes
1973	361	99%	Yes
1974	355	97%	Yes
1975	355	97%	Yes
1976	361	99%	Yes
1977	192	53%	No

Latest Records

Latest records at C.A.E. Llera
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
31 July 1977	C.A.E. Llera, MX	daily rain	19.8 mm (0.8 in)	13.4 mm (0.5 in)	32 years	19 of 100 (Routine)
31 July 1977	C.A.E. Llera, MX	daily low min (Tie)	11.7 C (53.1 F)	tie	0 years	0 of 100 (Routine)
30 July 1977	C.A.E. Llera, MX	daily low min	11.7 C (53.1 F)	5.0 C (9.0 F)	3 years	17 of 100 (Routine)
30 July 1977	C.A.E. Llera, MX	daily low max	23.9 C (75.0 F)	1.7 C (3.1 F)	0 years	6 of 100 (Routine)
29 July 1977	C.A.E. Llera, MX	daily low max	25.6 C (78.1 F)	2.2 C (4.0 F)	0 years	8 of 100 (Routine)
27 July 1977	C.A.E. Llera, MX	daily low min	13.9 C (57.0 F)	1.1 C (2.0 F)	0 years	6 of 100 (Routine)
26 July 1977	C.A.E. Llera, MX	daily low min	13.9 C (57.0 F)	1.1 C (2.0 F)	0 years	6 of 100 (Routine)
25 July 1977	C.A.E. Llera, MX	daily low min (Tie)	11.7 C (53.1 F)	tie	0 years	0 of 100 (Routine)
21 July 1977	C.A.E. Llera, MX	daily low max (Tie)	25.6 C (78.1 F)	tie	4 years	1 of 100 (Routine)
18 July 1977	C.A.E. Llera, MX	daily low max (Tie)	25.6 C (78.1 F)	tie	0 years	0 of 100 (Routine)
17 July 1977	C.A.E. Llera, MX	daily low min (Tie)	13.9 C (57.0 F)	tie	2 years	0 of 100 (Routine)
14 July 1977	C.A.E. Llera, MX	daily low max (Tie)	22.8 C (73.0 F)	tie	3 years	0 of 100 (Routine)
9 July 1977	C.A.E. Llera, MX	daily low max (Tie)	23.9 C (75.0 F)	tie	3 years	0 of 100 (Routine)
8 July 1977	C.A.E. Llera, MX	daily low max	21.7 C (71.1 F)	2.2 C (4.0 F)	3 years	8 of 100 (Routine)
7 July 1977	C.A.E. Llera, MX	daily low min (Tie)	13.9 C (57.0 F)	tie	2 years	0 of 100 (Routine)
6 July 1977	C.A.E. Llera, MX	daily low max	21.7 C (71.1 F)	2.2 C (4.0 F)	3 years	8 of 100 (Routine)
6 July 1977	C.A.E. Llera, MX	daily low min (Tie)	13.9 C (57.0 F)	tie	3 years	0 of 100 (Routine)
30 June 1977	C.A.E. Llera, MX	daily low min (Tie)	13.9 C (57.0 F)	tie	0 years	0 of 100 (Routine)
29 June 1977	C.A.E. Llera, MX	daily low min	11.7 C (53.1 F)	2.2 C (4.0 F)	3 years	9 of 100 (Routine)
26 June 1977	C.A.E. Llera, MX	daily low max	21.7 C (71.1 F)	2.2 C (4.0 F)	3 years	7 of 100 (Routine)

Climate Trend

31 complete years, 1945 to 1976

One stripe for each of 31 complete years at C.A.E. Llera, 1945 to 1976. Blue stripes are years cooler than the station's own mean of 25.2 C (77.4 F); red stripes are warmer. The coolest year was 1976, at 19.0 C (66.1 F), and the warmest was 1957, at 31.7 C (89.0 F). The strongest colour marks a difference of 6.5 C (11.7 F).

Annual mean temperature at C.A.E. Llera as warming stripes, 1945 to 1976
Year	Annual mean temperature	Difference from the station mean
1945	27.1 C	+1.86 C
1946	26.0 C	+0.74 C
1947	25.7 C	+0.43 C
1948	26.4 C	+1.11 C
1949	26.8 C	+1.58 C
1950	27.2 C	+1.94 C
1951	26.3 C	+1.07 C
1952	26.5 C	+1.20 C
1953	26.5 C	+1.21 C
1954	25.4 C	+0.15 C
1955	25.5 C	+0.29 C
1956	26.9 C	+1.66 C
1957	31.7 C	+6.40 C
1958	31.0 C	+5.77 C
1959	31.4 C	+6.10 C
1960	29.1 C	+3.85 C
1961	24.3 C	-0.94 C
1962	25.8 C	+0.50 C
1963	24.1 C	-1.19 C
1964	24.3 C	-0.93 C
1965	24.4 C	-0.86 C
1966	23.3 C	-2.00 C
1967	23.9 C	-1.33 C
1968	23.1 C	-2.19 C
1970	23.2 C	-2.09 C
1971	23.0 C	-2.22 C
1972	22.7 C	-2.54 C
1973	20.3 C	-4.98 C
1974	19.9 C	-5.36 C
1975	22.3 C	-3.00 C
1976	19.0 C	-6.30 C

The annual mean temperature here has fallen by 2.2 C (1.3 to 3.1) per decade over 1945 to 1976. In Fahrenheit: 3.9 F (2.3 to 5.6) per decade. The slope is a straight line fitted to 31 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at C.A.E. Llera
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	-2.2 C (-3.1 to -1.3) per decade	-3.9 F (-5.6 to -2.3) per decade	1945 to 1976	31	Fall
Mean daily maximum	-2.7 C (-3.4 to -1.9) per decade	-4.8 F (-6.2 to -3.4) per decade	1945 to 1976	31	Fall
Mean daily minimum	-1.7 C (-2.8 to -0.6) per decade	-3.1 F (-5.1 to -1.1) per decade	1945 to 1976	31	Fall

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

1941 to 1977

Yearly extremes at C.A.E. Llera: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	48.3 C (118.9 F)	1953	42.2 C (108.0 F)	37
Coldest night (TNn)	-5.0 C (23.0 F)	1963	2.2 C (36.0 F)	37
Wettest day (Rx1day)	225.3 mm (8.9 in)	1966	77.0 mm (3.0 in)	37
Wettest five days (Rx5day)	285.8 mm (11.3 in)	1976	131.5 mm (5.2 in)	37
Longest dry spell (CDD)	131 days	1975	64 days	37

Hottest day (TXx)

The hottest day of the year at C.A.E. Llera, 1941 to 1977. The record is 48.3 C (118.9 F) in 1953, marked on the chart; the median year is 42.2 C (108.0 F).

Hottest day (TXx) at C.A.E. Llera by year
Year	Hottest day (TXx)
1941	35.0 C (95.0 F)
1942	38.9 C (102.0 F)
1943	42.2 C (108.0 F)
1944	41.7 C (107.1 F)
1945	43.9 C (111.0 F)
1946	45.0 C (113.0 F)
1947	42.8 C (109.0 F)
1948	45.0 C (113.0 F)
1949	42.8 C (109.0 F)
1950	43.3 C (109.9 F)
1951	44.4 C (111.9 F)
1952	41.7 C (107.1 F)
1953	48.3 C (118.9 F)
1954	43.3 C (109.9 F)
1955	43.9 C (111.0 F)
1956	42.8 C (109.0 F)
1957	46.7 C (116.1 F)
1958	45.6 C (114.1 F)
1959	45.0 C (113.0 F)
1960	45.0 C (113.0 F)
1961	40.6 C (105.1 F)
1962	47.8 C (118.0 F)
1963	41.7 C (107.1 F)
1964	42.8 C (109.0 F)
1965	41.1 C (106.0 F)
1966	41.7 C (107.1 F)
1967	44.4 C (111.9 F)
1968	40.0 C (104.0 F)
1969	42.2 C (108.0 F)
1970	42.2 C (108.0 F)
1971	42.2 C (108.0 F)
1972	35.6 C (96.1 F)
1973	40.0 C (104.0 F)
1974	38.9 C (102.0 F)
1975	38.9 C (102.0 F)
1976	38.9 C (102.0 F)
1977	36.7 C (98.1 F)

Coldest night (TNn)

The coldest night of the year at C.A.E. Llera, 1941 to 1977. The record is -5.0 C (23.0 F) in 1963, marked on the chart; the median year is 2.2 C (36.0 F).

Coldest night (TNn) at C.A.E. Llera by year
Year	Coldest night (TNn)
1941	3.9 C (39.0 F)
1942	2.2 C (36.0 F)
1943	2.8 C (37.0 F)
1944	0.0 C (32.0 F)
1945	3.9 C (39.0 F)
1946	3.3 C (37.9 F)
1947	2.2 C (36.0 F)
1948	1.7 C (35.1 F)
1949	0.0 C (32.0 F)
1950	0.0 C (32.0 F)
1951	0.0 C (32.0 F)
1952	2.8 C (37.0 F)
1953	2.8 C (37.0 F)
1954	3.9 C (39.0 F)
1955	0.0 C (32.0 F)
1956	1.1 C (34.0 F)
1957	10.0 C (50.0 F)
1958	16.7 C (62.1 F)
1959	18.9 C (66.0 F)
1960	3.9 C (39.0 F)
1961	2.8 C (37.0 F)
1962	-2.8 C (27.0 F)
1963	-5.0 C (23.0 F)
1964	1.7 C (35.1 F)
1965	-2.2 C (28.0 F)
1966	0.0 C (32.0 F)
1967	-2.2 C (28.0 F)
1968	1.7 C (35.1 F)
1969	3.3 C (37.9 F)
1970	1.7 C (35.1 F)
1971	2.8 C (37.0 F)
1972	3.9 C (39.0 F)
1973	-2.2 C (28.0 F)
1974	-4.4 C (24.1 F)
1975	0.0 C (32.0 F)
1976	5.0 C (41.0 F)
1977	5.6 C (42.1 F)

Wettest day (Rx1day)

The wettest day of the year at C.A.E. Llera, 1941 to 1977. The record is 225.3 mm (8.9 in) in 1966, marked on the chart; the median year is 77.0 mm (3.0 in).

Wettest day (Rx1day) at C.A.E. Llera by year
Year	Wettest day (Rx1day)
1941	27.9 mm (1.1 in)
1942	47.8 mm (1.9 in)
1943	61.0 mm (2.4 in)
1944	133.4 mm (5.3 in)
1945	52.8 mm (2.1 in)
1946	74.9 mm (2.9 in)
1947	52.8 mm (2.1 in)
1948	77.0 mm (3.0 in)
1949	72.4 mm (2.9 in)
1950	103.9 mm (4.1 in)
1951	69.9 mm (2.8 in)
1952	40.9 mm (1.6 in)
1953	39.9 mm (1.6 in)
1954	69.9 mm (2.8 in)
1955	32.8 mm (1.3 in)
1956	86.9 mm (3.4 in)
1957	99.8 mm (3.9 in)
1958	119.9 mm (4.7 in)
1959	63.0 mm (2.5 in)
1960	47.8 mm (1.9 in)
1961	91.9 mm (3.6 in)
1962	99.3 mm (3.9 in)
1963	120.9 mm (4.8 in)
1964	96.8 mm (3.8 in)
1965	17.3 mm (0.7 in)
1966	225.3 mm (8.9 in)
1967	102.9 mm (4.1 in)
1968	59.9 mm (2.4 in)
1969	41.9 mm (1.6 in)
1970	192.8 mm (7.6 in)
1971	86.4 mm (3.4 in)
1972	110.0 mm (4.3 in)
1973	79.8 mm (3.1 in)
1974	82.8 mm (3.3 in)
1975	95.0 mm (3.7 in)
1976	89.9 mm (3.5 in)
1977	40.9 mm (1.6 in)

Wettest five days (Rx5day)

The wettest five days of the year at C.A.E. Llera, 1941 to 1977. The record is 285.8 mm (11.3 in) in 1976, marked on the chart; the median year is 131.5 mm (5.2 in).

Wettest five days (Rx5day) at C.A.E. Llera by year
Year	Wettest five days (Rx5day)
1941	36.8 mm (1.4 in)
1942	49.6 mm (2.0 in)
1943	141.3 mm (5.6 in)
1944	189.6 mm (7.5 in)
1945	84.8 mm (3.3 in)
1946	131.5 mm (5.2 in)
1947	162.6 mm (6.4 in)
1948	104.7 mm (4.1 in)
1949	74.5 mm (2.9 in)
1950	152.1 mm (6.0 in)
1951	169.8 mm (6.7 in)
1952	77.3 mm (3.0 in)
1953	84.6 mm (3.3 in)
1954	71.6 mm (2.8 in)
1955	58.2 mm (2.3 in)
1956	155.3 mm (6.1 in)
1957	114.5 mm (4.5 in)
1958	184.5 mm (7.3 in)
1959	214.4 mm (8.4 in)
1960	62.7 mm (2.5 in)
1961	144.5 mm (5.7 in)
1962	189.2 mm (7.4 in)
1963	120.9 mm (4.8 in)
1964	96.8 mm (3.8 in)
1965	35.6 mm (1.4 in)
1966	271.6 mm (10.7 in)
1967	184.5 mm (7.3 in)
1968	75.2 mm (3.0 in)
1969	67.4 mm (2.7 in)
1970	248.3 mm (9.8 in)
1971	206.8 mm (8.1 in)
1972	151.1 mm (5.9 in)
1973	209.7 mm (8.3 in)
1974	114.6 mm (4.5 in)
1975	219.5 mm (8.6 in)
1976	285.8 mm (11.3 in)
1977	71.7 mm (2.8 in)

Longest dry spell (CDD)

The longest dry spell of the year at C.A.E. Llera, 1941 to 1977. The record is 131 days in 1975, marked on the chart; the median year is 64 days.

Longest dry spell (CDD) at C.A.E. Llera by year
Year	Longest dry spell (CDD)
1941	26 days
1942	19 days
1943	41 days
1944	51 days
1945	59 days
1946	61 days
1947	56 days
1948	73 days
1949	57 days
1950	80 days
1951	58 days
1952	64 days
1953	77 days
1954	61 days
1955	118 days
1956	112 days
1957	53 days
1958	68 days
1959	70 days
1960	117 days
1961	63 days
1962	71 days
1963	70 days
1964	50 days
1965	58 days
1966	48 days
1967	68 days
1968	34 days
1969	43 days
1970	96 days
1971	129 days
1972	71 days
1973	71 days
1974	51 days
1975	131 days
1976	120 days
1977	80 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, 1943 to 1976

A day with at least 77.9 mm (3.1 in) of rain is expected about once in 2 years. A day with at least 216.4 mm (8.5 in) of rain is expected about once in 100 years.

Rainfall return levels at C.A.E. Llera: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	77.9 mm (3.1 in)
5 years	113.5 mm (4.5 in)
10 years	137.7 mm (5.4 in)
25 years	168.9 mm (6.6 in)
50 years	192.5 mm (7.6 in)	Longer than the 34 years of record
100 years	216.4 mm (8.5 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 1943 to 1976.

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: 225.3 mm (8.9 in) in 1966; 192.8 mm (7.6 in) in 1970; 133.4 mm (5.3 in) in 1944.

Download the Data

Data for C.A.E. Llera standing records by year: CSV or JSON. Field meanings are on the data page.
Data for C.A.E. Llera 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 2026-10-14 (14 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).