San Juan del Mezquital Weather Records (MXN00010046)

Record envelope, standing records and threshold days for San Juan del Mezquital (MXN00010046), Mexico, with 57 years of record.

Key Facts for San Juan del Mezquital

San Juan del Mezquital (MXN00010046) is a weather station in Mexico at 23.47 latitude and -104.47 longitude, 1,922 m (6,305 ft) above sea level.
The station reports from 1942 to 1998, 57 years of record.
1,464 records set at San Juan del Mezquital still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
San Juan del Mezquital set a daily record precipitation of 31.8 mm (1.3 in) on 18 September 1998.

About the Station

Location: Mexico, 23.47 latitude, -104.47 longitude.
Elevation: 1,922 m (6,305 ft).
Period of record: 1942 to 1998, 57 years.
Eligible elements: 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 del Mezquital. 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 del Mezquital, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	32.8 C (91.0 F)	-8.3 C (17.1 F)	n/a	n/a
Feb	36.7 C (98.1 F)	-7.2 C (19.0 F)	n/a	n/a
Mar	36.1 C (97.0 F)	-3.3 C (26.1 F)	n/a	n/a
Apr	40.6 C (105.1 F)	-2.2 C (28.0 F)	n/a	n/a
May	42.8 C (109.0 F)	1.1 C (34.0 F)	n/a	n/a
Jun	40.6 C (105.1 F)	5.6 C (42.1 F)	n/a	n/a
Jul	38.9 C (102.0 F)	8.9 C (48.0 F)	n/a	n/a
Aug	38.9 C (102.0 F)	5.6 C (42.1 F)	n/a	n/a
Sep	38.9 C (102.0 F)	2.8 C (37.0 F)	n/a	n/a
Oct	37.8 C (100.0 F)	0.6 C (33.1 F)	n/a	n/a
Nov	36.1 C (97.0 F)	-7.2 C (19.0 F)	n/a	n/a
Dec	35.0 C (95.0 F)	-7.2 C (19.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at San Juan del Mezquital still stand. 1958 holds the most, with 159.

Standing records at San Juan del Mezquital by the year they were set
Year set	Standing records
1957	15
1958	159
1959	89
1960	78
1969	9
1970	65
1971	55
1972	62
1973	47
1974	66
1975	34
1976	38
1977	38
1978	31
1979	59
1980	76
1981	152
1982	81
1983	108
1984	43
1985	5
1986	27
1987	27
1988	37
1989	39
1990	24

Wettest Day of Each Month

Nov: 119.9 mm (4.7 in)

The wettest day on record for each calendar month at San Juan del Mezquital. The most was 119.9 mm (4.7 in) on 25 November 1982.

Record daily precipitation for each month at San Juan del Mezquital
Month	Record daily precipitation (mm)	Date
Jan	65.3 mm (2.6 in)	24 January 1992
Feb	48.3 mm (1.9 in)	1 February 1997
Mar	19.8 mm (0.8 in)	3 March 1983
Apr	29.5 mm (1.2 in)	13 April 1997
May	49.8 mm (2.0 in)	27 May 1983
Jun	59.9 mm (2.4 in)	26 June 1981
Jul	112.8 mm (4.4 in)	31 July 1943
Aug	55.4 mm (2.2 in)	9 August 1986
Sep	59.9 mm (2.4 in)	24 September 1977
Oct	48.8 mm (1.9 in)	7 October 1943
Nov	119.9 mm (4.7 in)	25 November 1982
Dec	53.6 mm (2.1 in)	4 December 1969

Period of Record Coverage

1957 to 1990

26 years of record at San Juan del Mezquital, 1957 to 1990. 6 years have data for under 90 percent of days and are left out of rankings: 1957, 1969, 1973, 1985, 1986, 1987.

Days with data per year at San Juan del Mezquital
Year	Days with data	Share of year	Complete
1957	60	16%	No
1958	334	92%	Yes
1959	357	98%	Yes
1960	366	100%	Yes
1969	89	24%	No
1970	365	100%	Yes
1971	365	100%	Yes
1972	365	100%	Yes
1973	304	83%	No
1974	365	100%	Yes
1975	364	100%	Yes
1976	366	100%	Yes
1977	365	100%	Yes
1978	365	100%	Yes
1979	364	100%	Yes
1980	364	99%	Yes
1981	364	100%	Yes
1982	365	100%	Yes
1983	364	100%	Yes
1984	366	100%	Yes
1985	59	16%	No
1986	273	75%	No
1987	245	67%	No
1988	335	92%	Yes
1989	365	100%	Yes
1990	365	100%	Yes

Latest Records

Latest records at San Juan del Mezquital
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 September 1998	San Juan del Mezquital, MX	daily rain	31.8 mm (1.3 in)	14.0 mm (0.6 in)	21 years	26 of 100 (Routine)
13 February 1998	San Juan del Mezquital, MX	daily rain	1.8 mm (0.07 in)	1.0 mm (0.04 in)	48 years	19 of 100 (Routine)
11 November 1997	San Juan del Mezquital, MX	daily rain	24.4 mm (1.0 in)	12.5 mm (0.5 in)	6 years	11 of 100 (Routine)
10 November 1997	San Juan del Mezquital, MX	daily rain	15.7 mm (0.6 in)	5.3 mm (0.21 in)	6 years	8 of 100 (Routine)
7 November 1997	San Juan del Mezquital, MX	daily rain	3.8 mm (0.15 in)	3.8 mm (0.15 in)	55 years	20 of 100 (Routine)
10 June 1997	San Juan del Mezquital, MX	daily rain	21.3 mm (0.8 in)	6.3 mm (0.25 in)	44 years	20 of 100 (Routine)
13 April 1997	San Juan del Mezquital, MX	monthly rain	29.5 mm (1.2 in)	11.7 mm (0.5 in)	15 years	30 of 100 (Routine)
3 April 1997	San Juan del Mezquital, MX	daily rain	3.8 mm (0.15 in)	3.8 mm (0.15 in)	55 years	20 of 100 (Routine)
1 February 1997	San Juan del Mezquital, MX	monthly rain	48.3 mm (1.9 in)	10.5 mm (0.4 in)	54 years	42 of 100 (Notable)
19 January 1997	San Juan del Mezquital, MX	daily rain	20.8 mm (0.8 in)	16.0 mm (0.6 in)	22 years	20 of 100 (Routine)
18 January 1997	San Juan del Mezquital, MX	daily rain	37.8 mm (1.5 in)	27.9 mm (1.1 in)	22 years	33 of 100 (Routine)
27 November 1996	San Juan del Mezquital, MX	daily rain	36.8 mm (1.4 in)	2.0 mm (0.08 in)	20 years	11 of 100 (Routine)
4 October 1996	San Juan del Mezquital, MX	daily rain	45.5 mm (1.8 in)	35.6 mm (1.4 in)	54 years	57 of 100 (Notable)
3 October 1996	San Juan del Mezquital, MX	daily rain	37.8 mm (1.5 in)	23.3 mm (0.9 in)	6 years	29 of 100 (Routine)
7 September 1996	San Juan del Mezquital, MX	daily rain	15.7 mm (0.6 in)	2.7 mm (0.11 in)	50 years	20 of 100 (Routine)
3 September 1996	San Juan del Mezquital, MX	daily rain	21.8 mm (0.9 in)	7.8 mm (0.31 in)	10 years	16 of 100 (Routine)
29 August 1996	San Juan del Mezquital, MX	daily rain	28.4 mm (1.1 in)	12.7 mm (0.5 in)	36 years	30 of 100 (Routine)
28 August 1996	San Juan del Mezquital, MX	daily rain	29.0 mm (1.1 in)	11.7 mm (0.5 in)	21 years	25 of 100 (Routine)
5 August 1996	San Juan del Mezquital, MX	daily rain	20.3 mm (0.8 in)	8.4 mm (0.33 in)	53 years	20 of 100 (Routine)
24 July 1995	San Juan del Mezquital, MX	daily rain	22.9 mm (0.9 in)	1.1 mm (0.04 in)	40 years	18 of 100 (Routine)

Climate Trend

18 complete years, 1959 to 1990

One stripe for each of 18 complete years at San Juan del Mezquital, 1959 to 1990. Blue stripes are years cooler than the station's own mean of 19.1 C (66.3 F); red stripes are warmer. The coolest year was 1981, at 15.0 C (59.0 F), and the warmest was 1972, at 21.1 C (70.1 F). The strongest colour marks a difference of 4.1 C (7.4 F).

Annual mean temperature at San Juan del Mezquital as warming stripes, 1959 to 1990
Year	Annual mean temperature	Difference from the station mean
1959	19.6 C	+0.52 C
1960	20.4 C	+1.32 C
1970	20.0 C	+0.98 C
1971	20.7 C	+1.66 C
1972	21.1 C	+2.08 C
1974	20.6 C	+1.52 C
1975	20.3 C	+1.26 C
1976	20.0 C	+0.96 C
1977	20.4 C	+1.33 C
1978	20.3 C	+1.26 C
1979	17.7 C	-1.38 C
1980	17.1 C	-2.01 C
1981	15.0 C	-4.06 C
1982	16.1 C	-3.00 C
1983	15.7 C	-3.32 C
1984	17.8 C	-1.31 C
1989	20.3 C	+1.24 C
1990	20.0 C	+0.94 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

1942 to 1998

Yearly extremes at San Juan del Mezquital: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	42.8 C (109.0 F)	1973	39.4 C (102.9 F)	26
Coldest night (TNn)	-8.3 C (17.1 F)	1983	-3.3 C (26.1 F)	26
Wettest day (Rx1day)	119.9 mm (4.7 in)	1982	39.9 mm (1.6 in)	49
Wettest five days (Rx5day)	137.7 mm (5.4 in)	1982	69.3 mm (2.7 in)	49
Longest dry spell (CDD)	159 days	1991	92 days	49

Hottest day (TXx)

The hottest day of the year at San Juan del Mezquital, 1942 to 1998. The record is 42.8 C (109.0 F) in 1973, marked on the chart; the median year is 39.4 C (102.9 F).

Hottest day (TXx) at San Juan del Mezquital by year
Year	Hottest day (TXx)
1942	n/a
1943	n/a
1944	n/a
1945	n/a
1946	n/a
1947	n/a
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	30.6 C (87.1 F)
1958	39.4 C (102.9 F)
1959	36.1 C (97.0 F)
1960	37.8 C (100.0 F)
1969	35.6 C (96.1 F)
1970	38.9 C (102.0 F)
1971	40.0 C (104.0 F)
1972	40.6 C (105.1 F)
1973	42.8 C (109.0 F)
1974	40.6 C (105.1 F)
1975	40.6 C (105.1 F)
1976	40.0 C (104.0 F)
1977	38.9 C (102.0 F)
1978	40.0 C (104.0 F)
1979	38.9 C (102.0 F)
1980	40.0 C (104.0 F)
1981	33.9 C (93.0 F)
1982	38.9 C (102.0 F)
1983	36.7 C (98.1 F)
1984	35.0 C (95.0 F)
1985	30.6 C (87.1 F)
1986	40.0 C (104.0 F)
1987	39.4 C (102.9 F)
1988	40.6 C (105.1 F)
1989	41.7 C (107.1 F)
1990	40.0 C (104.0 F)
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	n/a
1998	n/a

Coldest night (TNn)

The coldest night of the year at San Juan del Mezquital, 1942 to 1998. The record is -8.3 C (17.1 F) in 1983, marked on the chart; the median year is -3.3 C (26.1 F).

Coldest night (TNn) at San Juan del Mezquital by year
Year	Coldest night (TNn)
1942	n/a
1943	n/a
1944	n/a
1945	n/a
1946	n/a
1947	n/a
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
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)
1969	-4.4 C (24.1 F)
1970	-5.0 C (23.0 F)
1971	-2.2 C (28.0 F)
1972	-2.2 C (28.0 F)
1973	-3.3 C (26.1 F)
1974	-2.2 C (28.0 F)
1975	-3.9 C (25.0 F)
1976	-5.0 C (23.0 F)
1977	-2.2 C (28.0 F)
1978	-3.3 C (26.1 F)
1979	-7.2 C (19.0 F)
1980	-5.0 C (23.0 F)
1981	-5.0 C (23.0 F)
1982	-7.2 C (19.0 F)
1983	-8.3 C (17.1 F)
1984	-7.2 C (19.0 F)
1985	-5.0 C (23.0 F)
1986	-3.3 C (26.1 F)
1987	0.0 C (32.0 F)
1988	0.0 C (32.0 F)
1989	-2.2 C (28.0 F)
1990	-4.4 C (24.1 F)
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	n/a
1998	n/a

Wettest day (Rx1day)

The wettest day of the year at San Juan del Mezquital, 1942 to 1998. The record is 119.9 mm (4.7 in) in 1982, marked on the chart; the median year is 39.9 mm (1.6 in).

Wettest day (Rx1day) at San Juan del Mezquital by year
Year	Wettest day (Rx1day)
1942	37.8 mm (1.5 in)
1943	112.8 mm (4.4 in)
1944	32.8 mm (1.3 in)
1945	11.9 mm (0.5 in)
1946	15.0 mm (0.6 in)
1947	15.5 mm (0.6 in)
1948	29.0 mm (1.1 in)
1949	35.3 mm (1.4 in)
1950	30.0 mm (1.2 in)
1951	24.9 mm (1.0 in)
1952	21.8 mm (0.9 in)
1953	47.0 mm (1.9 in)
1954	38.9 mm (1.5 in)
1955	22.4 mm (0.9 in)
1956	35.8 mm (1.4 in)
1957	32.8 mm (1.3 in)
1958	21.3 mm (0.8 in)
1959	39.9 mm (1.6 in)
1960	22.9 mm (0.9 in)
1969	53.6 mm (2.1 in)
1970	51.1 mm (2.0 in)
1971	39.9 mm (1.6 in)
1972	89.9 mm (3.5 in)
1973	49.8 mm (2.0 in)
1974	39.9 mm (1.6 in)
1975	37.8 mm (1.5 in)
1976	34.8 mm (1.4 in)
1977	59.9 mm (2.4 in)
1978	56.9 mm (2.2 in)
1979	39.9 mm (1.6 in)
1980	39.9 mm (1.6 in)
1981	59.9 mm (2.4 in)
1982	119.9 mm (4.7 in)
1983	49.8 mm (2.0 in)
1984	49.8 mm (2.0 in)
1985	39.9 mm (1.6 in)
1986	55.4 mm (2.2 in)
1987	41.9 mm (1.6 in)
1988	33.8 mm (1.3 in)
1989	45.0 mm (1.8 in)
1990	50.8 mm (2.0 in)
1991	31.0 mm (1.2 in)
1992	65.3 mm (2.6 in)
1993	10.4 mm (0.4 in)
1994	20.3 mm (0.8 in)
1995	22.9 mm (0.9 in)
1996	45.5 mm (1.8 in)
1997	48.3 mm (1.9 in)
1998	31.8 mm (1.3 in)

Wettest five days (Rx5day)

The wettest five days of the year at San Juan del Mezquital, 1942 to 1998. The record is 137.7 mm (5.4 in) in 1982, marked on the chart; the median year is 69.3 mm (2.7 in).

Wettest five days (Rx5day) at San Juan del Mezquital by year
Year	Wettest five days (Rx5day)
1942	38.1 mm (1.5 in)
1943	126.1 mm (5.0 in)
1944	77.2 mm (3.0 in)
1945	40.6 mm (1.6 in)
1946	37.4 mm (1.5 in)
1947	34.8 mm (1.4 in)
1948	84.8 mm (3.3 in)
1949	51.0 mm (2.0 in)
1950	69.4 mm (2.7 in)
1951	67.3 mm (2.6 in)
1952	54.4 mm (2.1 in)
1953	65.1 mm (2.6 in)
1954	66.6 mm (2.6 in)
1955	68.1 mm (2.7 in)
1956	67.9 mm (2.7 in)
1957	52.6 mm (2.1 in)
1958	48.8 mm (1.9 in)
1959	69.3 mm (2.7 in)
1960	48.5 mm (1.9 in)
1969	71.4 mm (2.8 in)
1970	87.5 mm (3.4 in)
1971	42.2 mm (1.7 in)
1972	94.8 mm (3.7 in)
1973	116.7 mm (4.6 in)
1974	73.3 mm (2.9 in)
1975	84.0 mm (3.3 in)
1976	86.4 mm (3.4 in)
1977	89.4 mm (3.5 in)
1978	112.5 mm (4.4 in)
1979	95.5 mm (3.8 in)
1980	109.3 mm (4.3 in)
1981	135.3 mm (5.3 in)
1982	137.7 mm (5.4 in)
1983	99.4 mm (3.9 in)
1984	93.3 mm (3.7 in)
1985	115.6 mm (4.6 in)
1986	62.0 mm (2.4 in)
1987	53.9 mm (2.1 in)
1988	77.3 mm (3.0 in)
1989	73.2 mm (2.9 in)
1990	69.1 mm (2.7 in)
1991	66.3 mm (2.6 in)
1992	105.0 mm (4.1 in)
1993	30.7 mm (1.2 in)
1994	50.1 mm (2.0 in)
1995	56.9 mm (2.2 in)
1996	91.7 mm (3.6 in)
1997	67.5 mm (2.7 in)
1998	43.2 mm (1.7 in)

Longest dry spell (CDD)

The longest dry spell of the year at San Juan del Mezquital, 1942 to 1998. The record is 159 days in 1991, marked on the chart; the median year is 92 days.

Longest dry spell (CDD) at San Juan del Mezquital by year
Year	Longest dry spell (CDD)
1942	80 days
1943	150 days
1944	138 days
1945	97 days
1946	65 days
1947	106 days
1948	26 days
1949	117 days
1950	88 days
1951	75 days
1952	96 days
1953	70 days
1954	158 days
1955	124 days
1956	113 days
1957	88 days
1958	71 days
1959	69 days
1960	134 days
1969	48 days
1970	103 days
1971	153 days
1972	145 days
1973	83 days
1974	86 days
1975	135 days
1976	132 days
1977	103 days
1978	92 days
1979	142 days
1980	99 days
1981	59 days
1982	154 days
1983	75 days
1984	133 days
1985	44 days
1986	65 days
1987	57 days
1988	61 days
1989	81 days
1990	77 days
1991	159 days
1992	88 days
1993	31 days
1994	89 days
1995	101 days
1996	120 days
1997	60 days
1998	92 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

36 years, 1942 to 1997

A day with at least 39.7 mm (1.6 in) of rain is expected about once in 2 years. A day with at least 135.4 mm (5.3 in) of rain is expected about once in 100 years.

Rainfall return levels at San Juan del Mezquital: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	39.7 mm (1.6 in)
5 years	56.6 mm (2.2 in)
10 years	70.7 mm (2.8 in)
25 years	92.5 mm (3.6 in)
50 years	112.2 mm (4.4 in)	Longer than the 36 years of record
100 years	135.4 mm (5.3 in)	Longer than the 36 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, 36 years of values from 1942 to 1997.

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: 119.9 mm (4.7 in) in 1982; 112.8 mm (4.4 in) in 1943; 89.9 mm (3.5 in) in 1972.

Download the Data

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