Zapotitlan Palmas (Smn) Weather Records (MXN00020190)

Record envelope, standing records and threshold days for Zapotitlan Palmas (Smn) (MXN00020190), Mexico, with 61 years of record.

Key Facts for Zapotitlan Palmas (Smn)

Zapotitlan Palmas (Smn) (MXN00020190) is a weather station in Mexico at 17.88 latitude and -97.82 longitude, 1,913 m (6,276 ft) above sea level.
The station reports from 1944 to 2004, 61 years of record.
1,464 records set at Zapotitlan Palmas (Smn) still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Zapotitlan Palmas (Smn) set a daily record precipitation of 8.1 mm (0.32 in) on 26 February 2004.

About the Station

Location: Mexico, 17.88 latitude, -97.82 longitude.
Elevation: 1,913 m (6,276 ft).
Period of record: 1944 to 2004, 61 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 Zapotitlan Palmas (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 Zapotitlan Palmas (Smn), with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	28.9 C (84.0 F)	0.6 C (33.1 F)	n/a	n/a
Feb	36.7 C (98.1 F)	5.0 C (41.0 F)	n/a	n/a
Mar	35.6 C (96.1 F)	5.0 C (41.0 F)	n/a	n/a
Apr	36.7 C (98.1 F)	8.9 C (48.0 F)	n/a	n/a
May	35.6 C (96.1 F)	8.9 C (48.0 F)	n/a	n/a
Jun	35.6 C (96.1 F)	8.9 C (48.0 F)	n/a	n/a
Jul	30.0 C (86.0 F)	6.7 C (44.1 F)	n/a	n/a
Aug	30.6 C (87.1 F)	7.8 C (46.0 F)	n/a	n/a
Sep	30.0 C (86.0 F)	7.8 C (46.0 F)	n/a	n/a
Oct	28.9 C (84.0 F)	5.0 C (41.0 F)	n/a	n/a
Nov	30.0 C (86.0 F)	0.6 C (33.1 F)	n/a	n/a
Dec	27.8 C (82.0 F)	5.0 C (41.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Zapotitlan Palmas (Smn) still stand. 1991 holds the most, with 236.

Wettest Day of Each Month

Sep: 94.7 mm (3.7 in)

The wettest day on record for each calendar month at Zapotitlan Palmas (Smn). The most was 94.7 mm (3.7 in) on 1 September 1968.

Record daily precipitation for each month at Zapotitlan Palmas (Smn)
Month	Record daily precipitation (mm)	Date
Jan	33.3 mm (1.3 in)	31 January 1992
Feb	25.9 mm (1.0 in)	25 February 1983
Mar	34.8 mm (1.4 in)	20 March 1984
Apr	43.9 mm (1.7 in)	28 April 1972
May	69.1 mm (2.7 in)	27 May 1966
Jun	88.6 mm (3.5 in)	26 June 1953
Jul	90.9 mm (3.6 in)	18 July 1972
Aug	68.3 mm (2.7 in)	3 August 1955
Sep	94.7 mm (3.7 in)	1 September 1968
Oct	70.4 mm (2.8 in)	24 October 1961
Nov	39.4 mm (1.6 in)	5 November 1992
Dec	35.8 mm (1.4 in)	5 December 1979

Period of Record Coverage

1985 to 2004

15 years of record at Zapotitlan Palmas (Smn), 1985 to 2004. 5 years have data for under 90 percent of days and are left out of rankings: 1985, 1993, 1994, 2000, 2004.

Days with data per year at Zapotitlan Palmas (Smn)
Year	Days with data	Share of year	Complete
1985	122	33%	No
1986	365	100%	Yes
1987	365	100%	Yes
1988	366	100%	Yes
1989	365	100%	Yes
1990	365	100%	Yes
1991	365	100%	Yes
1992	365	100%	Yes
1993	274	75%	No
1994	59	16%	No
1997	365	100%	Yes
1998	365	100%	Yes
1999	365	100%	Yes
2000	206	56%	No
2004	28	8%	No

Latest Records

Latest records at Zapotitlan Palmas (Smn)
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
26 February 2004	Zapotitlan Palmas (Smn), MX	daily rain	8.1 mm (0.32 in)	6.1 mm (0.24 in)	46 years	20 of 100 (Routine)
16 February 2004	Zapotitlan Palmas (Smn), MX	daily rain	22.4 mm (0.9 in)	19.1 mm (0.8 in)	17 years	20 of 100 (Routine)
15 February 2004	Zapotitlan Palmas (Smn), MX	daily rain	1.8 mm (0.07 in)	1.8 mm (0.07 in)	58 years	20 of 100 (Routine)
14 February 2004	Zapotitlan Palmas (Smn), MX	daily rain	11.2 mm (0.4 in)	11.2 mm (0.4 in)	58 years	20 of 100 (Routine)
8 June 2002	Zapotitlan Palmas (Smn), MX	daily rain	19.8 mm (0.8 in)	2.5 mm (0.10 in)	24 years	13 of 100 (Routine)
18 May 2002	Zapotitlan Palmas (Smn), MX	daily rain	18.3 mm (0.7 in)	3.8 mm (0.15 in)	16 years	14 of 100 (Routine)
15 April 2002	Zapotitlan Palmas (Smn), MX	daily rain	8.4 mm (0.33 in)	4.1 mm (0.16 in)	9 years	12 of 100 (Routine)
9 April 2002	Zapotitlan Palmas (Smn), MX	daily rain	29.5 mm (1.2 in)	18.1 mm (0.7 in)	4 years	32 of 100 (Routine)
27 February 2002	Zapotitlan Palmas (Smn), MX	daily rain	2.3 mm (0.09 in)	1.8 mm (0.07 in)	12 years	11 of 100 (Routine)
8 February 2002	Zapotitlan Palmas (Smn), MX	daily rain	8.4 mm (0.33 in)	8.4 mm (0.33 in)	56 years	20 of 100 (Routine)
26 December 2001	Zapotitlan Palmas (Smn), MX	daily rain	6.4 mm (0.25 in)	4.1 mm (0.16 in)	39 years	20 of 100 (Routine)
24 December 2001	Zapotitlan Palmas (Smn), MX	daily rain	8.4 mm (0.33 in)	8.4 mm (0.33 in)	56 years	20 of 100 (Routine)
27 August 2001	Zapotitlan Palmas (Smn), MX	daily rain (Tie)	24.9 mm (1.0 in)	tie	22 years	2 of 100 (Routine)
25 March 2001	Zapotitlan Palmas (Smn), MX	daily rain	6.4 mm (0.25 in)	2.8 mm (0.11 in)	32 years	18 of 100 (Routine)
2 March 2001	Zapotitlan Palmas (Smn), MX	daily rain	15.5 mm (0.6 in)	15.5 mm (0.6 in)	56 years	20 of 100 (Routine)
13 August 2000	Zapotitlan Palmas (Smn), MX	daily rain	34.8 mm (1.4 in)	1.0 mm (0.04 in)	31 years	14 of 100 (Routine)
20 February 2000	Zapotitlan Palmas (Smn), MX	daily rain	7.1 mm (0.28 in)	0.2 mm (0.01 in)	45 years	18 of 100 (Routine)
19 February 2000	Zapotitlan Palmas (Smn), MX	daily rain	4.8 mm (0.19 in)	1.0 mm (0.04 in)	9 years	8 of 100 (Routine)
5 February 2000	Zapotitlan Palmas (Smn), MX	daily rain	4.3 mm (0.17 in)	1.0 mm (0.04 in)	44 years	19 of 100 (Routine)
3 February 2000	Zapotitlan Palmas (Smn), MX	daily rain	4.6 mm (0.18 in)	4.6 mm (0.18 in)	54 years	20 of 100 (Routine)

Climate Trend

10 complete years, 1986 to 1999

One stripe for each of 10 complete years at Zapotitlan Palmas (Smn), 1986 to 1999. Blue stripes are years cooler than the station's own mean of 18.4 C (65.2 F); red stripes are warmer. The coolest year was 1997, at 16.6 C (61.8 F), and the warmest was 1991, at 20.8 C (69.5 F). The strongest colour marks a difference of 2.4 C (4.3 F).

Annual mean temperature at Zapotitlan Palmas (Smn) as warming stripes, 1986 to 1999
Year	Annual mean temperature	Difference from the station mean
1986	17.9 C	-0.58 C
1987	18.2 C	-0.19 C
1988	18.8 C	+0.37 C
1989	18.9 C	+0.46 C
1990	18.9 C	+0.45 C
1991	20.8 C	+2.38 C
1992	19.7 C	+1.25 C
1997	16.6 C	-1.86 C
1998	17.3 C	-1.18 C
1999	17.4 C	-1.06 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 2004

Yearly extremes at Zapotitlan Palmas (Smn): the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	36.7 C (98.1 F)	1991	31.7 C (89.1 F)	15
Coldest night (TNn)	0.6 C (33.1 F)	1986	6.7 C (44.1 F)	15
Wettest day (Rx1day)	94.7 mm (3.7 in)	1968	46.9 mm (1.8 in)	56
Wettest five days (Rx5day)	241.8 mm (9.5 in)	1998	102.4 mm (4.0 in)	56
Longest dry spell (CDD)	130 days	1970	60 days	56

Hottest day (TXx)

The hottest day of the year at Zapotitlan Palmas (Smn), 1944 to 2004. The record is 36.7 C (98.1 F) in 1991, marked on the chart; the median year is 31.7 C (89.1 F).

Hottest day (TXx) at Zapotitlan Palmas (Smn) by year
Year	Hottest day (TXx)
1944	n/a
1945	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	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	n/a
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	n/a
1977	n/a
1978	n/a
1979	n/a
1980	n/a
1981	n/a
1982	n/a
1983	n/a
1984	n/a
1985	26.7 C (80.1 F)
1986	31.7 C (89.1 F)
1987	30.6 C (87.1 F)
1988	35.0 C (95.0 F)
1989	31.7 C (89.1 F)
1990	30.0 C (86.0 F)
1991	36.7 C (98.1 F)
1992	35.6 C (96.1 F)
1993	35.0 C (95.0 F)
1994	28.9 C (84.0 F)
1997	28.9 C (84.0 F)
1998	35.0 C (95.0 F)
1999	28.9 C (84.0 F)
2000	28.9 C (84.0 F)
2001	n/a
2002	n/a
2004	36.7 C (98.1 F)

Coldest night (TNn)

The coldest night of the year at Zapotitlan Palmas (Smn), 1944 to 2004. The record is 0.6 C (33.1 F) in 1986, marked on the chart; the median year is 6.7 C (44.1 F).

Coldest night (TNn) at Zapotitlan Palmas (Smn) by year
Year	Coldest night (TNn)
1944	n/a
1945	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	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	n/a
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	n/a
1977	n/a
1978	n/a
1979	n/a
1980	n/a
1981	n/a
1982	n/a
1983	n/a
1984	n/a
1985	6.7 C (44.1 F)
1986	0.6 C (33.1 F)
1987	5.0 C (41.0 F)
1988	7.8 C (46.0 F)
1989	5.0 C (41.0 F)
1990	3.9 C (39.0 F)
1991	7.8 C (46.0 F)
1992	5.0 C (41.0 F)
1993	5.6 C (42.1 F)
1994	7.8 C (46.0 F)
1997	6.7 C (44.1 F)
1998	0.6 C (33.1 F)
1999	7.8 C (46.0 F)
2000	10.0 C (50.0 F)
2001	n/a
2002	n/a
2004	13.9 C (57.0 F)

Wettest day (Rx1day)

The wettest day of the year at Zapotitlan Palmas (Smn), 1944 to 2004. The record is 94.7 mm (3.7 in) in 1968, marked on the chart; the median year is 46.9 mm (1.8 in).

Wettest day (Rx1day) at Zapotitlan Palmas (Smn) by year
Year	Wettest day (Rx1day)
1944	31.8 mm (1.3 in)
1945	0.8 mm (0.03 in)
1948	46.5 mm (1.8 in)
1949	38.9 mm (1.5 in)
1950	42.4 mm (1.7 in)
1951	47.2 mm (1.9 in)
1952	40.4 mm (1.6 in)
1953	88.6 mm (3.5 in)
1954	67.1 mm (2.6 in)
1955	68.3 mm (2.7 in)
1956	49.5 mm (1.9 in)
1957	37.8 mm (1.5 in)
1958	69.6 mm (2.7 in)
1959	53.6 mm (2.1 in)
1960	59.4 mm (2.3 in)
1961	70.4 mm (2.8 in)
1962	84.6 mm (3.3 in)
1963	40.1 mm (1.6 in)
1964	42.2 mm (1.7 in)
1965	66.5 mm (2.6 in)
1966	76.5 mm (3.0 in)
1967	57.7 mm (2.3 in)
1968	94.7 mm (3.7 in)
1969	40.1 mm (1.6 in)
1970	43.9 mm (1.7 in)
1971	46.5 mm (1.8 in)
1972	90.9 mm (3.6 in)
1973	51.8 mm (2.0 in)
1974	45.0 mm (1.8 in)
1975	39.9 mm (1.6 in)
1976	54.9 mm (2.2 in)
1977	45.0 mm (1.8 in)
1978	60.5 mm (2.4 in)
1979	52.8 mm (2.1 in)
1980	74.9 mm (2.9 in)
1981	63.5 mm (2.5 in)
1982	44.2 mm (1.7 in)
1983	56.1 mm (2.2 in)
1984	52.8 mm (2.1 in)
1985	49.3 mm (1.9 in)
1986	32.8 mm (1.3 in)
1987	63.0 mm (2.5 in)
1988	31.0 mm (1.2 in)
1989	39.9 mm (1.6 in)
1990	31.8 mm (1.3 in)
1991	91.9 mm (3.6 in)
1992	46.5 mm (1.8 in)
1993	54.9 mm (2.2 in)
1994	0.0 mm (0.00 in)
1997	42.4 mm (1.7 in)
1998	84.8 mm (3.3 in)
1999	34.8 mm (1.4 in)
2000	38.4 mm (1.5 in)
2001	34.8 mm (1.4 in)
2002	29.5 mm (1.2 in)
2004	22.4 mm (0.9 in)

Wettest five days (Rx5day)

The wettest five days of the year at Zapotitlan Palmas (Smn), 1944 to 2004. The record is 241.8 mm (9.5 in) in 1998, marked on the chart; the median year is 102.4 mm (4.0 in).

Wettest five days (Rx5day) at Zapotitlan Palmas (Smn) by year
Year	Wettest five days (Rx5day)
1944	70.4 mm (2.8 in)
1945	1.6 mm (0.06 in)
1948	99.4 mm (3.9 in)
1949	96.1 mm (3.8 in)
1950	73.6 mm (2.9 in)
1951	144.3 mm (5.7 in)
1952	94.8 mm (3.7 in)
1953	105.3 mm (4.1 in)
1954	130.0 mm (5.1 in)
1955	147.0 mm (5.8 in)
1956	71.2 mm (2.8 in)
1957	107.4 mm (4.2 in)
1958	105.6 mm (4.2 in)
1959	102.9 mm (4.1 in)
1960	164.4 mm (6.5 in)
1961	82.0 mm (3.2 in)
1962	136.2 mm (5.4 in)
1963	71.3 mm (2.8 in)
1964	83.1 mm (3.3 in)
1965	129.8 mm (5.1 in)
1966	152.0 mm (6.0 in)
1967	130.6 mm (5.1 in)
1968	112.2 mm (4.4 in)
1969	106.5 mm (4.2 in)
1970	126.3 mm (5.0 in)
1971	127.5 mm (5.0 in)
1972	127.2 mm (5.0 in)
1973	101.8 mm (4.0 in)
1974	99.4 mm (3.9 in)
1975	66.4 mm (2.6 in)
1976	138.0 mm (5.4 in)
1977	97.8 mm (3.9 in)
1978	113.1 mm (4.5 in)
1979	100.0 mm (3.9 in)
1980	116.3 mm (4.6 in)
1981	160.0 mm (6.3 in)
1982	118.7 mm (4.7 in)
1983	137.0 mm (5.4 in)
1984	85.4 mm (3.4 in)
1985	73.7 mm (2.9 in)
1986	65.6 mm (2.6 in)
1987	132.1 mm (5.2 in)
1988	57.1 mm (2.2 in)
1989	79.1 mm (3.1 in)
1990	71.2 mm (2.8 in)
1991	116.3 mm (4.6 in)
1992	86.3 mm (3.4 in)
1993	70.4 mm (2.8 in)
1994	0.0 mm (0.00 in)
1997	76.5 mm (3.0 in)
1998	241.8 mm (9.5 in)
1999	90.9 mm (3.6 in)
2000	109.1 mm (4.3 in)
2001	107.5 mm (4.2 in)
2002	66.3 mm (2.6 in)
2004	43.5 mm (1.7 in)

Longest dry spell (CDD)

The longest dry spell of the year at Zapotitlan Palmas (Smn), 1944 to 2004. The record is 130 days in 1970, marked on the chart; the median year is 60 days.

Longest dry spell (CDD) at Zapotitlan Palmas (Smn) by year
Year	Longest dry spell (CDD)
1944	41 days
1945	60 days
1948	37 days
1949	125 days
1950	70 days
1951	70 days
1952	61 days
1953	111 days
1954	82 days
1955	52 days
1956	73 days
1957	46 days
1958	43 days
1959	84 days
1960	106 days
1961	58 days
1962	58 days
1963	119 days
1964	52 days
1965	44 days
1966	51 days
1967	62 days
1968	52 days
1969	72 days
1970	130 days
1971	82 days
1972	52 days
1973	95 days
1974	44 days
1975	90 days
1976	36 days
1977	51 days
1978	36 days
1979	35 days
1980	35 days
1981	32 days
1982	80 days
1983	84 days
1984	98 days
1985	71 days
1986	53 days
1987	62 days
1988	91 days
1989	98 days
1990	49 days
1991	107 days
1992	55 days
1993	47 days
1994	59 days
1997	40 days
1998	111 days
1999	74 days
2000	50 days
2001	72 days
2002	36 days
2004	7 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

47 years, 1949 to 2001

A day with at least 50.9 mm (2.0 in) of rain is expected about once in 2 years. A day with at least 112.2 mm (4.4 in) of rain is expected about once in 100 years.

Rainfall return levels at Zapotitlan Palmas (Smn): the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	50.9 mm (2.0 in)
5 years	66.2 mm (2.6 in)
10 years	76.8 mm (3.0 in)
25 years	90.6 mm (3.6 in)
50 years	101.3 mm (4.0 in)	Longer than the 47 years of record
100 years	112.2 mm (4.4 in)	Longer than the 47 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, 47 years of values from 1949 to 2001.

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: 91.9 mm (3.6 in) in 1991; 90.9 mm (3.6 in) in 1972; 88.6 mm (3.5 in) in 1953.

Download the Data

Data for Zapotitlan Palmas (Smn) standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Zapotitlan Palmas (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 2026-10-15 (15 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).