San Juan Bautista Coixtlahuac Weather Records (MXN00020019)

Record envelope, standing records and threshold days for San Juan Bautista Coixtlahuac (MXN00020019), Mexico, with 42 years of record.

Key Facts for San Juan Bautista Coixtlahuac

San Juan Bautista Coixtlahuac (MXN00020019) is a weather station in Mexico at 17.72 latitude and -97.32 longitude, 2,181 m (7,155 ft) above sea level.
The station reports from 1951 to 1992, 42 years of record.
1,464 records set at San Juan Bautista Coixtlahuac still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
San Juan Bautista Coixtlahuac set a daily record high minimum temperature of 10.0 C (50.0 F) on 27 January 1992.

About the Station

Location: Mexico, 17.72 latitude, -97.32 longitude.
Elevation: 2,181 m (7,155 ft).
Period of record: 1951 to 1992, 42 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 San Juan Bautista Coixtlahuac. 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 San Juan Bautista Coixtlahuac, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	30.6 C (87.1 F)	-8.3 C (17.1 F)	n/a	n/a
Feb	31.7 C (89.1 F)	-5.0 C (23.0 F)	n/a	n/a
Mar	38.9 C (102.0 F)	-5.0 C (23.0 F)	n/a	n/a
Apr	35.6 C (96.1 F)	-2.2 C (28.0 F)	n/a	n/a
May	33.9 C (93.0 F)	1.7 C (35.1 F)	n/a	n/a
Jun	31.7 C (89.1 F)	3.9 C (39.0 F)	n/a	n/a
Jul	30.6 C (87.1 F)	0.6 C (33.1 F)	n/a	n/a
Aug	30.6 C (87.1 F)	3.9 C (39.0 F)	n/a	n/a
Sep	31.7 C (89.1 F)	2.8 C (37.0 F)	n/a	n/a
Oct	28.9 C (84.0 F)	-2.2 C (28.0 F)	n/a	n/a
Nov	28.9 C (84.0 F)	-5.0 C (23.0 F)	n/a	n/a
Dec	28.9 C (84.0 F)	-8.3 C (17.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at San Juan Bautista Coixtlahuac still stand. 1967 holds the most, with 98.

Standing records at San Juan Bautista Coixtlahuac by the year they were set
Year set	Standing records
1951	74
1952	71
1953	72
1954	75
1955	49
1956	54
1957	39
1958	28
1959	20
1960	15
1961	15
1962	25
1963	60
1964	19
1965	49
1966	96
1967	98
1968	57
1969	39
1970	45
1971	38
1972	36
1973	46
1974	39
1975	26
1976	26
1977	23
1978	44
1979	28
1980	24
1981	15
1982	21
1983	33
1984	34
1988	11
1991	18
1992	2

All-Time Record Progression

1 new records

1 all-time records were set at San Juan Bautista Coixtlahuac between 31 December 1983 and 31 December 1983. Each dot is a new record.

Wettest Day of Each Month

Jul: 99.8 mm (3.9 in)

The wettest day on record for each calendar month at San Juan Bautista Coixtlahuac. The most was 99.8 mm (3.9 in) on 3 July 1966.

Record daily precipitation for each month at San Juan Bautista Coixtlahuac
Month	Record daily precipitation (mm)	Date
Jan	39.9 mm (1.6 in)	19 January 1958
Feb	21.8 mm (0.9 in)	21 February 1966
Mar	41.9 mm (1.6 in)	20 March 1951
Apr	47.8 mm (1.9 in)	30 April 1961
May	67.6 mm (2.7 in)	30 May 1981
Jun	83.8 mm (3.3 in)	10 June 1959
Jul	99.8 mm (3.9 in)	3 July 1966
Aug	63.0 mm (2.5 in)	2 August 1972
Sep	58.4 mm (2.3 in)	6 September 1955
Oct	59.9 mm (2.4 in)	4 October 1965
Nov	20.8 mm (0.8 in)	26 November 1980
Dec	24.9 mm (1.0 in)	22 December 1962

Period of Record Coverage

1951 to 1992

37 years of record at San Juan Bautista Coixtlahuac, 1951 to 1992. 5 years have data for under 90 percent of days and are left out of rankings: 1951, 1952, 1983, 1991, 1992.

Days with data per year at San Juan Bautista Coixtlahuac
Year	Days with data	Share of year	Complete
1951	311	85%	No
1952	222	61%	No
1953	364	100%	Yes
1954	365	100%	Yes
1955	365	100%	Yes
1956	365	100%	Yes
1957	365	100%	Yes
1958	365	100%	Yes
1959	365	100%	Yes
1960	366	100%	Yes
1961	365	100%	Yes
1962	365	100%	Yes
1963	365	100%	Yes
1964	366	100%	Yes
1965	365	100%	Yes
1966	365	100%	Yes
1967	365	100%	Yes
1968	365	100%	Yes
1969	339	93%	Yes
1970	365	100%	Yes
1971	365	100%	Yes
1972	366	100%	Yes
1973	365	100%	Yes
1974	365	100%	Yes
1975	365	100%	Yes
1976	366	100%	Yes
1977	365	100%	Yes
1978	365	100%	Yes
1979	365	100%	Yes
1980	366	100%	Yes
1981	365	100%	Yes
1982	364	100%	Yes
1983	293	80%	No
1984	335	92%	Yes
1988	366	100%	Yes
1991	327	90%	No
1992	30	8%	No

Latest Records

Latest records at San Juan Bautista Coixtlahuac
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
27 January 1992	San Juan Bautista Coixtlahuac, MX	daily high min	10.0 C (50.0 F)	1.1 C (2.0 F)	40 years	20 of 100 (Routine)
15 January 1992	San Juan Bautista Coixtlahuac, MX	daily high min (Tie)	7.8 C (46.0 F)	tie	24 years	2 of 100 (Routine)
14 January 1992	San Juan Bautista Coixtlahuac, MX	daily high min (Tie)	8.9 C (48.0 F)	tie	25 years	2 of 100 (Routine)
7 January 1992	San Juan Bautista Coixtlahuac, MX	daily high min	8.9 C (48.0 F)	0.6 C (1.1 F)	8 years	8 of 100 (Routine)
29 December 1991	San Juan Bautista Coixtlahuac, MX	daily low max (Tie)	15.6 C (60.1 F)	tie	36 years	3 of 100 (Routine)
28 December 1991	San Juan Bautista Coixtlahuac, MX	daily low max	15.6 C (60.1 F)	0.5 C (0.9 F)	6 years	7 of 100 (Routine)
25 December 1991	San Juan Bautista Coixtlahuac, MX	daily high min (Tie)	8.9 C (48.0 F)	tie	34 years	3 of 100 (Routine)
17 December 1991	San Juan Bautista Coixtlahuac, MX	daily high max (Tie)	25.6 C (78.1 F)	tie	25 years	2 of 100 (Routine)
22 November 1991	San Juan Bautista Coixtlahuac, MX	daily high min	10.6 C (51.1 F)	0.6 C (1.1 F)	33 years	15 of 100 (Routine)
12 November 1991	San Juan Bautista Coixtlahuac, MX	daily high min	10.6 C (51.1 F)	0.6 C (1.1 F)	33 years	15 of 100 (Routine)
11 November 1991	San Juan Bautista Coixtlahuac, MX	daily high max	27.8 C (82.0 F)	2.2 C (4.0 F)	18 years	15 of 100 (Routine)
9 November 1991	San Juan Bautista Coixtlahuac, MX	daily high min (Tie)	10.0 C (50.0 F)	tie	33 years	3 of 100 (Routine)
6 November 1991	San Juan Bautista Coixtlahuac, MX	daily high max (Tie)	25.6 C (78.1 F)	tie	25 years	2 of 100 (Routine)
5 November 1991	San Juan Bautista Coixtlahuac, MX	daily high min (Tie)	10.6 C (51.1 F)	tie	36 years	3 of 100 (Routine)
4 November 1991	San Juan Bautista Coixtlahuac, MX	daily high min (Tie)	11.7 C (53.1 F)	tie	32 years	3 of 100 (Routine)
2 November 1991	San Juan Bautista Coixtlahuac, MX	daily high min (Tie)	10.6 C (51.1 F)	tie	36 years	3 of 100 (Routine)
8 October 1991	San Juan Bautista Coixtlahuac, MX	daily low min (Tie)	5.0 C (41.0 F)	tie	12 years	1 of 100 (Routine)
7 October 1991	San Juan Bautista Coixtlahuac, MX	daily low max (Tie)	15.6 C (60.1 F)	tie	10 years	1 of 100 (Routine)
6 October 1991	San Juan Bautista Coixtlahuac, MX	daily low max (Tie)	17.8 C (64.0 F)	tie	37 years	3 of 100 (Routine)
1 October 1991	San Juan Bautista Coixtlahuac, MX	daily high max (Tie)	25.0 C (77.0 F)	tie	25 years	2 of 100 (Routine)

Climate Trend

30 complete years, 1953 to 1988

One stripe for each of 30 complete years at San Juan Bautista Coixtlahuac, 1953 to 1988. Blue stripes are years cooler than the station's own mean of 15.5 C (60.0 F); red stripes are warmer. The coolest year was 1967, at 14.3 C (57.7 F), and the warmest was 1963, at 16.2 C (61.1 F). The strongest colour marks a difference of 1.3 C (2.3 F).

Annual mean temperature at San Juan Bautista Coixtlahuac as warming stripes, 1953 to 1988
Year	Annual mean temperature	Difference from the station mean
1953	16.1 C	+0.61 C
1954	15.4 C	-0.12 C
1955	15.2 C	-0.36 C
1956	14.8 C	-0.70 C
1957	15.8 C	+0.22 C
1958	16.0 C	+0.43 C
1959	15.5 C	-0.07 C
1960	15.8 C	+0.23 C
1961	15.8 C	+0.25 C
1962	16.1 C	+0.54 C
1963	16.2 C	+0.64 C
1964	15.5 C	-0.05 C
1965	16.0 C	+0.44 C
1966	15.9 C	+0.36 C
1967	14.3 C	-1.26 C
1968	14.3 C	-1.21 C
1970	15.0 C	-0.54 C
1971	15.2 C	-0.30 C
1972	15.6 C	+0.05 C
1973	16.0 C	+0.44 C
1974	14.8 C	-0.70 C
1975	15.4 C	-0.11 C
1976	15.3 C	-0.23 C
1977	15.6 C	+0.08 C
1978	15.9 C	+0.40 C
1979	15.8 C	+0.22 C
1980	15.8 C	+0.29 C
1981	15.5 C	-0.02 C
1982	15.6 C	+0.02 C
1988	16.0 C	+0.44 C

The fitted trend in annual mean temperature here over 1953 to 1988 is 0.01 C (-0.19 to 0.21) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.01 F (-0.35 to 0.37) per decade. The slope is a straight line fitted to 30 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at San Juan Bautista Coixtlahuac
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.01 C (-0.19 to 0.21) per decade	0.01 F (-0.35 to 0.37) per decade	1953 to 1988	30	Not clearly different from zero
Mean daily maximum	0.22 C (-0.02 to 0.46) per decade	0.40 F (-0.03 to 0.83) per decade	1953 to 1988	30	Not clearly different from zero
Mean daily minimum	-0.2 C (-0.5 to 0.1) per decade	-0.4 F (-0.9 to 0.1) per decade	1953 to 1988	30	Not clearly different from zero

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

1951 to 1992

Yearly extremes at San Juan Bautista Coixtlahuac: 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)	1952	31.7 C (89.1 F)	37
Coldest night (TNn)	-8.3 C (17.1 F)	1956	-2.2 C (28.0 F)	37
Wettest day (Rx1day)	99.8 mm (3.9 in)	1966	40.9 mm (1.6 in)	37
Wettest five days (Rx5day)	160.2 mm (6.3 in)	1959	85.9 mm (3.4 in)	37
Longest dry spell (CDD)	128 days	1991	72 days	37

Hottest day (TXx)

The hottest day of the year at San Juan Bautista Coixtlahuac, 1951 to 1992. The record is 38.9 C (102.0 F) in 1952, marked on the chart; the median year is 31.7 C (89.1 F).

Hottest day (TXx) at San Juan Bautista Coixtlahuac by year
Year	Hottest day (TXx)
1951	30.6 C (87.1 F)
1952	38.9 C (102.0 F)
1953	31.7 C (89.1 F)
1954	32.8 C (91.0 F)
1955	31.7 C (89.1 F)
1956	30.0 C (86.0 F)
1957	30.6 C (87.1 F)
1958	31.7 C (89.1 F)
1959	30.6 C (87.1 F)
1960	30.6 C (87.1 F)
1961	32.8 C (91.0 F)
1962	31.7 C (89.1 F)
1963	30.6 C (87.1 F)
1964	32.8 C (91.0 F)
1965	31.7 C (89.1 F)
1966	30.0 C (86.0 F)
1967	28.9 C (84.0 F)
1968	28.9 C (84.0 F)
1969	30.6 C (87.1 F)
1970	31.7 C (89.1 F)
1971	35.6 C (96.1 F)
1972	31.7 C (89.1 F)
1973	36.7 C (98.1 F)
1974	31.7 C (89.1 F)
1975	35.0 C (95.0 F)
1976	30.0 C (86.0 F)
1977	32.8 C (91.0 F)
1978	32.8 C (91.0 F)
1979	32.8 C (91.0 F)
1980	38.9 C (102.0 F)
1981	31.7 C (89.1 F)
1982	31.7 C (89.1 F)
1983	32.2 C (90.0 F)
1984	34.4 C (93.9 F)
1988	35.6 C (96.1 F)
1991	33.9 C (93.0 F)
1992	26.7 C (80.1 F)

Coldest night (TNn)

The coldest night of the year at San Juan Bautista Coixtlahuac, 1951 to 1992. The record is -8.3 C (17.1 F) in 1956, marked on the chart; the median year is -2.2 C (28.0 F).

Coldest night (TNn) at San Juan Bautista Coixtlahuac by year
Year	Coldest night (TNn)
1951	0.0 C (32.0 F)
1952	-0.6 C (30.9 F)
1953	-0.6 C (30.9 F)
1954	-0.6 C (30.9 F)
1955	-4.4 C (24.1 F)
1956	-8.3 C (17.1 F)
1957	-4.4 C (24.1 F)
1958	0.6 C (33.1 F)
1959	0.0 C (32.0 F)
1960	-2.2 C (28.0 F)
1961	-5.0 C (23.0 F)
1962	-1.1 C (30.0 F)
1963	-3.3 C (26.1 F)
1964	-2.2 C (28.0 F)
1965	-1.1 C (30.0 F)
1966	-8.3 C (17.1 F)
1967	0.0 C (32.0 F)
1968	-5.0 C (23.0 F)
1969	-5.0 C (23.0 F)
1970	-4.4 C (24.1 F)
1971	-4.4 C (24.1 F)
1972	-5.0 C (23.0 F)
1973	-5.0 C (23.0 F)
1974	-3.3 C (26.1 F)
1975	-2.2 C (28.0 F)
1976	-5.0 C (23.0 F)
1977	-4.4 C (24.1 F)
1978	-1.1 C (30.0 F)
1979	0.0 C (32.0 F)
1980	0.0 C (32.0 F)
1981	0.0 C (32.0 F)
1982	-2.2 C (28.0 F)
1983	0.0 C (32.0 F)
1984	-2.2 C (28.0 F)
1988	-1.1 C (30.0 F)
1991	0.6 C (33.1 F)
1992	1.7 C (35.1 F)

Wettest day (Rx1day)

The wettest day of the year at San Juan Bautista Coixtlahuac, 1951 to 1992. The record is 99.8 mm (3.9 in) in 1966, marked on the chart; the median year is 40.9 mm (1.6 in).

Wettest day (Rx1day) at San Juan Bautista Coixtlahuac by year
Year	Wettest day (Rx1day)
1951	41.9 mm (1.6 in)
1952	26.9 mm (1.1 in)
1953	39.9 mm (1.6 in)
1954	39.9 mm (1.6 in)
1955	58.4 mm (2.3 in)
1956	43.4 mm (1.7 in)
1957	39.9 mm (1.6 in)
1958	42.9 mm (1.7 in)
1959	83.8 mm (3.3 in)
1960	33.3 mm (1.3 in)
1961	47.8 mm (1.9 in)
1962	50.8 mm (2.0 in)
1963	29.0 mm (1.1 in)
1964	31.0 mm (1.2 in)
1965	59.9 mm (2.4 in)
1966	99.8 mm (3.9 in)
1967	52.8 mm (2.1 in)
1968	42.4 mm (1.7 in)
1969	30.0 mm (1.2 in)
1970	40.6 mm (1.6 in)
1971	30.7 mm (1.2 in)
1972	63.0 mm (2.5 in)
1973	62.0 mm (2.4 in)
1974	43.9 mm (1.7 in)
1975	55.9 mm (2.2 in)
1976	36.8 mm (1.4 in)
1977	40.9 mm (1.6 in)
1978	31.8 mm (1.3 in)
1979	48.8 mm (1.9 in)
1980	74.9 mm (2.9 in)
1981	76.7 mm (3.0 in)
1982	30.5 mm (1.2 in)
1983	17.8 mm (0.7 in)
1984	40.4 mm (1.6 in)
1988	39.9 mm (1.6 in)
1991	19.8 mm (0.8 in)
1992	0.0 mm (0.00 in)

Wettest five days (Rx5day)

The wettest five days of the year at San Juan Bautista Coixtlahuac, 1951 to 1992. The record is 160.2 mm (6.3 in) in 1959, marked on the chart; the median year is 85.9 mm (3.4 in).

Wettest five days (Rx5day) at San Juan Bautista Coixtlahuac by year
Year	Wettest five days (Rx5day)
1951	85.9 mm (3.4 in)
1952	44.0 mm (1.7 in)
1953	75.0 mm (3.0 in)
1954	92.0 mm (3.6 in)
1955	110.5 mm (4.4 in)
1956	93.2 mm (3.7 in)
1957	56.5 mm (2.2 in)
1958	67.6 mm (2.7 in)
1959	160.2 mm (6.3 in)
1960	58.7 mm (2.3 in)
1961	58.6 mm (2.3 in)
1962	67.3 mm (2.6 in)
1963	71.1 mm (2.8 in)
1964	74.7 mm (2.9 in)
1965	89.9 mm (3.5 in)
1966	111.4 mm (4.4 in)
1967	97.4 mm (3.8 in)
1968	87.6 mm (3.4 in)
1969	91.1 mm (3.6 in)
1970	67.8 mm (2.7 in)
1971	54.4 mm (2.1 in)
1972	67.4 mm (2.7 in)
1973	109.7 mm (4.3 in)
1974	112.2 mm (4.4 in)
1975	115.7 mm (4.6 in)
1976	73.1 mm (2.9 in)
1977	87.6 mm (3.4 in)
1978	74.4 mm (2.9 in)
1979	120.4 mm (4.7 in)
1980	105.6 mm (4.2 in)
1981	156.0 mm (6.1 in)
1982	69.5 mm (2.7 in)
1983	32.8 mm (1.3 in)
1984	113.0 mm (4.4 in)
1988	135.7 mm (5.3 in)
1991	29.7 mm (1.2 in)
1992	0.0 mm (0.00 in)

Longest dry spell (CDD)

The longest dry spell of the year at San Juan Bautista Coixtlahuac, 1951 to 1992. The record is 128 days in 1991, marked on the chart; the median year is 72 days.

Longest dry spell (CDD) at San Juan Bautista Coixtlahuac by year
Year	Longest dry spell (CDD)
1951	72 days
1952	48 days
1953	77 days
1954	53 days
1955	77 days
1956	100 days
1957	46 days
1958	86 days
1959	82 days
1960	79 days
1961	81 days
1962	88 days
1963	60 days
1964	91 days
1965	82 days
1966	74 days
1967	60 days
1968	30 days
1969	58 days
1970	111 days
1971	72 days
1972	48 days
1973	45 days
1974	45 days
1975	65 days
1976	52 days
1977	119 days
1978	43 days
1979	50 days
1980	75 days
1981	33 days
1982	48 days
1983	72 days
1984	61 days
1988	116 days
1991	128 days
1992	31 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

32 years, 1953 to 1988

A day with at least 43.7 mm (1.7 in) of rain is expected about once in 2 years. A day with at least 117.2 mm (4.6 in) of rain is expected about once in 100 years.

Rainfall return levels at San Juan Bautista Coixtlahuac: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	43.7 mm (1.7 in)
5 years	58.2 mm (2.3 in)
10 years	69.6 mm (2.7 in)
25 years	86.4 mm (3.4 in)
50 years	100.9 mm (4.0 in)	Longer than the 32 years of record
100 years	117.2 mm (4.6 in)	Longer than the 32 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, 32 years of values from 1953 to 1988.

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: 99.8 mm (3.9 in) in 1966; 83.8 mm (3.3 in) in 1959; 76.7 mm (3.0 in) in 1981.

Download the Data

Data for San Juan Bautista Coixtlahuac standing records by year: CSV or JSON. Field meanings are on the data page.
Data for San Juan Bautista Coixtlahuac 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).