Zinacatepec (Smn) Weather Records (MXN00021113)

Record envelope, standing records and threshold days for Zinacatepec (Smn) (MXN00021113), Mexico, with 43 years of record.

Key Facts for Zinacatepec (Smn)

Zinacatepec (Smn) (MXN00021113) is a weather station in Mexico at 18.33 latitude and -97.25 longitude, 2,521 m (8,270 ft) above sea level.
The station reports from 1942 to 1984, 43 years of record.
1,464 records set at Zinacatepec (Smn) still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Zinacatepec (Smn) set a daily record precipitation of 7.9 mm (0.31 in) on 29 June 1984.

About the Station

Location: Mexico, 18.33 latitude, -97.25 longitude.
Elevation: 2,521 m (8,270 ft).
Period of record: 1942 to 1984, 43 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 Zinacatepec (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 Zinacatepec (Smn), with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	38.9 C (102.0 F)	0.6 C (33.1 F)	n/a	n/a
Feb	37.8 C (100.0 F)	1.7 C (35.1 F)	n/a	n/a
Mar	40.6 C (105.1 F)	5.0 C (41.0 F)	n/a	n/a
Apr	41.7 C (107.1 F)	7.8 C (46.0 F)	n/a	n/a
May	41.7 C (107.1 F)	10.0 C (50.0 F)	n/a	n/a
Jun	41.7 C (107.1 F)	10.0 C (50.0 F)	n/a	n/a
Jul	40.0 C (104.0 F)	10.0 C (50.0 F)	n/a	n/a
Aug	38.9 C (102.0 F)	10.0 C (50.0 F)	n/a	n/a
Sep	38.9 C (102.0 F)	10.0 C (50.0 F)	n/a	n/a
Oct	37.8 C (100.0 F)	6.7 C (44.1 F)	n/a	n/a
Nov	37.8 C (100.0 F)	5.6 C (42.1 F)	n/a	n/a
Dec	35.6 C (96.1 F)	1.7 C (35.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Zinacatepec (Smn) still stand. 1964 holds the most, with 265.

Standing records at Zinacatepec (Smn) by the year they were set
Year set	Standing records
1954	66
1955	72
1956	71
1957	63
1958	46
1959	38
1960	28
1961	57
1962	47
1963	151
1964	265
1965	31
1966	15
1967	41
1968	33
1969	48
1970	22
1972	115
1973	52
1974	37
1975	20
1976	28
1977	24
1978	10
1979	24
1980	16
1981	10
1982	16
1983	10
1984	8

Wettest Day of Each Month

Sep: 131.8 mm (5.2 in)

The wettest day on record for each calendar month at Zinacatepec (Smn). The most was 131.8 mm (5.2 in) on 19 September 1960.

Record daily precipitation for each month at Zinacatepec (Smn)
Month	Record daily precipitation (mm)	Date
Jan	19.8 mm (0.8 in)	19 January 1958
Feb	18.8 mm (0.7 in)	25 February 1983
Mar	30.0 mm (1.2 in)	17 March 1969
Apr	24.9 mm (1.0 in)	21 April 1946
May	82.8 mm (3.3 in)	31 May 1964
Jun	82.8 mm (3.3 in)	30 June 1964
Jul	47.8 mm (1.9 in)	30 July 1961
Aug	62.0 mm (2.4 in)	18 August 1960
Sep	131.8 mm (5.2 in)	19 September 1960
Oct	45.0 mm (1.8 in)	31 October 1959
Nov	34.8 mm (1.4 in)	9 November 1955
Dec	40.1 mm (1.6 in)	11 December 1947

Period of Record Coverage

1954 to 1984

30 years of record at Zinacatepec (Smn), 1954 to 1984. 17 years have data for under 90 percent of days and are left out of rankings: 1954, 1961, 1962, 1963, 1964, 1965, 1966, 1967 and others.

Days with data per year at Zinacatepec (Smn)
Year	Days with data	Share of year	Complete
1954	324	89%	No
1955	359	98%	Yes
1956	364	99%	Yes
1957	365	100%	Yes
1958	361	99%	Yes
1959	334	92%	Yes
1960	364	99%	Yes
1961	257	70%	No
1962	262	72%	No
1963	300	82%	No
1964	181	49%	No
1965	180	49%	No
1966	208	57%	No
1967	299	82%	No
1968	240	66%	No
1969	300	82%	No
1970	120	33%	No
1972	305	83%	No
1973	333	91%	Yes
1974	365	100%	Yes
1975	212	58%	No
1976	365	100%	Yes
1977	365	100%	Yes
1978	332	91%	Yes
1979	274	75%	No
1980	304	83%	No
1981	243	67%	No
1982	365	100%	Yes
1983	365	100%	Yes
1984	181	49%	No

Latest Records

Latest records at Zinacatepec (Smn)
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
29 June 1984	Zinacatepec (Smn), MX	daily rain	7.9 mm (0.31 in)	3.3 mm (0.13 in)	11 years	9 of 100 (Routine)
7 June 1984	Zinacatepec (Smn), MX	daily rain	19.8 mm (0.8 in)	1.0 mm (0.04 in)	6 years	5 of 100 (Routine)
3 June 1984	Zinacatepec (Smn), MX	daily rain	19.8 mm (0.8 in)	17.0 mm (0.7 in)	4 years	18 of 100 (Routine)
9 February 1984	Zinacatepec (Smn), MX	daily rain	1.8 mm (0.07 in)	1.8 mm (0.07 in)	40 years	17 of 100 (Routine)
11 January 1984	Zinacatepec (Smn), MX	daily rain	15.7 mm (0.6 in)	15.7 mm (0.6 in)	40 years	20 of 100 (Routine)
7 November 1983	Zinacatepec (Smn), MX	daily rain	15.0 mm (0.6 in)	15.0 mm (0.6 in)	40 years	20 of 100 (Routine)
14 July 1983	Zinacatepec (Smn), MX	daily rain	19.8 mm (0.8 in)	7.9 mm (0.31 in)	2 years	12 of 100 (Routine)
13 July 1983	Zinacatepec (Smn), MX	daily rain	24.9 mm (1.0 in)	15.0 mm (0.6 in)	26 years	20 of 100 (Routine)
17 June 1983	Zinacatepec (Smn), MX	daily rain	41.9 mm (1.6 in)	11.9 mm (0.5 in)	36 years	23 of 100 (Routine)
13 March 1983	Zinacatepec (Smn), MX	daily rain	11.9 mm (0.5 in)	11.6 mm (0.5 in)	21 years	20 of 100 (Routine)
12 March 1983	Zinacatepec (Smn), MX	daily rain	11.9 mm (0.5 in)	11.4 mm (0.4 in)	32 years	20 of 100 (Routine)
25 February 1983	Zinacatepec (Smn), MX	monthly rain	18.8 mm (0.7 in)	10.9 mm (0.4 in)	15 years	20 of 100 (Routine)
12 February 1983	Zinacatepec (Smn), MX	monthly rain (Tie)	7.9 mm (0.31 in)	tie	14 years	4 of 100 (Routine)
11 February 1983	Zinacatepec (Smn), MX	daily rain	5.8 mm (0.23 in)	4.0 mm (0.16 in)	4 years	9 of 100 (Routine)
8 October 1982	Zinacatepec (Smn), MX	daily rain	31.8 mm (1.3 in)	13.0 mm (0.5 in)	28 years	25 of 100 (Routine)
7 October 1982	Zinacatepec (Smn), MX	daily rain	19.8 mm (0.8 in)	6.8 mm (0.27 in)	15 years	14 of 100 (Routine)
20 May 1982	Zinacatepec (Smn), MX	daily rain	19.8 mm (0.8 in)	15.2 mm (0.6 in)	12 years	19 of 100 (Routine)
1 March 1982	Zinacatepec (Smn), MX	daily rain	3.8 mm (0.15 in)	3.8 mm (0.15 in)	39 years	18 of 100 (Routine)
26 February 1982	Zinacatepec (Smn), MX	daily rain (Tie)	2.8 mm (0.11 in)	tie	24 years	2 of 100 (Routine)
25 September 1980	Zinacatepec (Smn), MX	daily rain (Tie)	11.9 mm (0.5 in)	tie	26 years	2 of 100 (Routine)

Climate Trend

10 complete years, 1955 to 1983

One stripe for each of 10 complete years at Zinacatepec (Smn), 1955 to 1983. Blue stripes are years cooler than the station's own mean of 22.9 C (73.3 F); red stripes are warmer. The coolest year was 1960, at 22.0 C (71.6 F), and the warmest was 1982, at 24.5 C (76.1 F). The strongest colour marks a difference of 1.6 C (2.9 F).

Annual mean temperature at Zinacatepec (Smn) as warming stripes, 1955 to 1983
Year	Annual mean temperature	Difference from the station mean
1955	22.0 C	-0.90 C
1956	22.2 C	-0.71 C
1957	23.5 C	+0.52 C
1958	22.1 C	-0.82 C
1960	22.0 C	-0.91 C
1974	23.5 C	+0.52 C
1976	22.2 C	-0.73 C
1977	23.1 C	+0.13 C
1982	24.5 C	+1.57 C
1983	24.3 C	+1.35 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 1984

Yearly extremes at Zinacatepec (Smn): the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	41.7 C (107.1 F)	1962	40.0 C (104.0 F)	30
Coldest night (TNn)	0.6 C (33.1 F)	1956	5.0 C (41.0 F)	30
Wettest day (Rx1day)	131.8 mm (5.2 in)	1960	34.3 mm (1.4 in)	42
Wettest five days (Rx5day)	151.3 mm (6.0 in)	1954	62.9 mm (2.5 in)	42
Longest dry spell (CDD)	233 days	1946	91 days	42

Hottest day (TXx)

The hottest day of the year at Zinacatepec (Smn), 1942 to 1984. The record is 41.7 C (107.1 F) in 1962, marked on the chart; the median year is 40.0 C (104.0 F).

Hottest day (TXx) at Zinacatepec (Smn) 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	38.9 C (102.0 F)
1955	40.0 C (104.0 F)
1956	40.0 C (104.0 F)
1957	38.9 C (102.0 F)
1958	40.0 C (104.0 F)
1959	35.6 C (96.1 F)
1960	37.8 C (100.0 F)
1961	38.9 C (102.0 F)
1962	41.7 C (107.1 F)
1963	40.0 C (104.0 F)
1964	41.7 C (107.1 F)
1965	40.6 C (105.1 F)
1966	37.8 C (100.0 F)
1967	35.6 C (96.1 F)
1968	31.7 C (89.1 F)
1969	37.8 C (100.0 F)
1970	31.7 C (89.1 F)
1972	37.8 C (100.0 F)
1973	41.7 C (107.1 F)
1974	40.0 C (104.0 F)
1975	40.6 C (105.1 F)
1976	40.0 C (104.0 F)
1977	38.9 C (102.0 F)
1978	40.6 C (105.1 F)
1979	40.0 C (104.0 F)
1980	40.0 C (104.0 F)
1981	37.8 C (100.0 F)
1982	40.0 C (104.0 F)
1983	40.0 C (104.0 F)
1984	40.0 C (104.0 F)

Coldest night (TNn)

The coldest night of the year at Zinacatepec (Smn), 1942 to 1984. The record is 0.6 C (33.1 F) in 1956, marked on the chart; the median year is 5.0 C (41.0 F).

Coldest night (TNn) at Zinacatepec (Smn) 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	5.0 C (41.0 F)
1955	1.7 C (35.1 F)
1956	0.6 C (33.1 F)
1957	1.7 C (35.1 F)
1958	5.6 C (42.1 F)
1959	3.9 C (39.0 F)
1960	5.0 C (41.0 F)
1961	7.8 C (46.0 F)
1962	3.9 C (39.0 F)
1963	2.8 C (37.0 F)
1964	20.6 C (69.1 F)
1965	6.7 C (44.1 F)
1966	5.6 C (42.1 F)
1967	2.8 C (37.0 F)
1968	3.9 C (39.0 F)
1969	10.0 C (50.0 F)
1970	12.8 C (55.0 F)
1972	10.0 C (50.0 F)
1973	5.6 C (42.1 F)
1974	5.6 C (42.1 F)
1975	5.0 C (41.0 F)
1976	1.7 C (35.1 F)
1977	5.0 C (41.0 F)
1978	6.7 C (44.1 F)
1979	2.8 C (37.0 F)
1980	5.0 C (41.0 F)
1981	5.0 C (41.0 F)
1982	5.0 C (41.0 F)
1983	5.0 C (41.0 F)
1984	5.6 C (42.1 F)

Wettest day (Rx1day)

The wettest day of the year at Zinacatepec (Smn), 1942 to 1984. The record is 131.8 mm (5.2 in) in 1960, marked on the chart; the median year is 34.3 mm (1.4 in).

Wettest day (Rx1day) at Zinacatepec (Smn) by year
Year	Wettest day (Rx1day)
1942	17.3 mm (0.7 in)
1943	62.5 mm (2.5 in)
1944	57.2 mm (2.3 in)
1945	0.0 mm (0.00 in)
1946	30.0 mm (1.2 in)
1947	79.8 mm (3.1 in)
1948	40.4 mm (1.6 in)
1949	14.0 mm (0.6 in)
1950	25.9 mm (1.0 in)
1951	8.1 mm (0.32 in)
1952	3.0 mm (0.12 in)
1953	6.9 mm (0.27 in)
1954	54.9 mm (2.2 in)
1955	54.9 mm (2.2 in)
1956	36.8 mm (1.4 in)
1957	34.8 mm (1.4 in)
1958	54.9 mm (2.2 in)
1959	47.8 mm (1.9 in)
1960	131.8 mm (5.2 in)
1961	47.8 mm (1.9 in)
1962	50.8 mm (2.0 in)
1963	31.8 mm (1.3 in)
1964	82.8 mm (3.3 in)
1965	24.4 mm (1.0 in)
1966	31.8 mm (1.3 in)
1967	25.1 mm (1.0 in)
1968	38.4 mm (1.5 in)
1969	44.2 mm (1.7 in)
1970	23.9 mm (0.9 in)
1972	24.6 mm (1.0 in)
1973	33.8 mm (1.3 in)
1974	65.5 mm (2.6 in)
1975	37.3 mm (1.5 in)
1976	36.6 mm (1.4 in)
1977	31.8 mm (1.3 in)
1978	38.9 mm (1.5 in)
1979	25.9 mm (1.0 in)
1980	25.9 mm (1.0 in)
1981	9.9 mm (0.39 in)
1982	31.8 mm (1.3 in)
1983	41.9 mm (1.6 in)
1984	19.8 mm (0.8 in)

Wettest five days (Rx5day)

The wettest five days of the year at Zinacatepec (Smn), 1942 to 1984. The record is 151.3 mm (6.0 in) in 1954, marked on the chart; the median year is 62.9 mm (2.5 in).

Wettest five days (Rx5day) at Zinacatepec (Smn) by year
Year	Wettest five days (Rx5day)
1942	17.3 mm (0.7 in)
1943	62.5 mm (2.5 in)
1944	106.3 mm (4.2 in)
1945	0.0 mm (0.00 in)
1946	37.4 mm (1.5 in)
1947	93.5 mm (3.7 in)
1948	94.5 mm (3.7 in)
1949	39.9 mm (1.6 in)
1950	47.7 mm (1.9 in)
1951	17.5 mm (0.7 in)
1952	6.8 mm (0.27 in)
1953	6.9 mm (0.27 in)
1954	151.3 mm (6.0 in)
1955	128.3 mm (5.1 in)
1956	46.7 mm (1.8 in)
1957	34.8 mm (1.4 in)
1958	111.8 mm (4.4 in)
1959	129.1 mm (5.1 in)
1960	131.8 mm (5.2 in)
1961	89.5 mm (3.5 in)
1962	90.4 mm (3.6 in)
1963	43.8 mm (1.7 in)
1964	92.5 mm (3.6 in)
1965	46.8 mm (1.8 in)
1966	50.1 mm (2.0 in)
1967	77.8 mm (3.1 in)
1968	118.0 mm (4.6 in)
1969	137.9 mm (5.4 in)
1970	61.8 mm (2.4 in)
1972	47.3 mm (1.9 in)
1973	79.5 mm (3.1 in)
1974	119.4 mm (4.7 in)
1975	66.3 mm (2.6 in)
1976	70.9 mm (2.8 in)
1977	42.7 mm (1.7 in)
1978	79.3 mm (3.1 in)
1979	42.2 mm (1.7 in)
1980	65.1 mm (2.6 in)
1981	15.5 mm (0.6 in)
1982	63.2 mm (2.5 in)
1983	59.7 mm (2.4 in)
1984	39.6 mm (1.6 in)

Longest dry spell (CDD)

The longest dry spell of the year at Zinacatepec (Smn), 1942 to 1984. The record is 233 days in 1946, marked on the chart; the median year is 91 days.

Longest dry spell (CDD) at Zinacatepec (Smn) by year
Year	Longest dry spell (CDD)
1942	43 days
1943	141 days
1944	121 days
1945	31 days
1946	233 days
1947	104 days
1948	112 days
1949	146 days
1950	118 days
1951	126 days
1952	52 days
1953	30 days
1954	105 days
1955	155 days
1956	155 days
1957	104 days
1958	116 days
1959	94 days
1960	170 days
1961	60 days
1962	58 days
1963	90 days
1964	51 days
1965	24 days
1966	31 days
1967	50 days
1968	24 days
1969	44 days
1970	59 days
1972	91 days
1973	80 days
1974	83 days
1975	85 days
1976	111 days
1977	114 days
1978	63 days
1979	67 days
1980	97 days
1981	94 days
1982	84 days
1983	73 days
1984	91 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 Zinacatepec (Smn) standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Zinacatepec (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 2026-10-17 (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).