Viesca (Smn) Weather Records (MXN00005051)

Record envelope, standing records and threshold days for Viesca (Smn) (MXN00005051), Mexico, with 34 years of record.

Key Facts for Viesca (Smn)

Viesca (Smn) (MXN00005051) is a weather station in Mexico at 25.35 latitude and -102.80 longitude, 1,093 m (3,585 ft) above sea level.
The station reports from 1940 to 1973, 34 years of record.
1,464 records set at Viesca (Smn) still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Viesca (Smn) set a daily record low maximum temperature of 20.6 C (69.1 F) on 27 September 1973.

About the Station

Location: Mexico, 25.35 latitude, -102.80 longitude.
Elevation: 1,093 m (3,585 ft).
Period of record: 1940 to 1973, 34 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 Viesca (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 Viesca (Smn), with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	40.0 C (104.0 F)	-10.6 C (12.9 F)	n/a	n/a
Feb	38.9 C (102.0 F)	-6.1 C (21.0 F)	n/a	n/a
Mar	43.9 C (111.0 F)	-3.9 C (25.0 F)	n/a	n/a
Apr	43.9 C (111.0 F)	-3.9 C (25.0 F)	n/a	n/a
May	45.0 C (113.0 F)	6.7 C (44.1 F)	n/a	n/a
Jun	43.9 C (111.0 F)	10.0 C (50.0 F)	n/a	n/a
Jul	45.0 C (113.0 F)	13.9 C (57.0 F)	n/a	n/a
Aug	45.0 C (113.0 F)	12.8 C (55.0 F)	n/a	n/a
Sep	43.9 C (111.0 F)	6.7 C (44.1 F)	n/a	n/a
Oct	40.6 C (105.1 F)	2.8 C (37.0 F)	n/a	n/a
Nov	38.9 C (102.0 F)	-1.1 C (30.0 F)	n/a	n/a
Dec	35.6 C (96.1 F)	-1.1 C (30.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Viesca (Smn) still stand. 1963 holds the most, with 336.

Standing records at Viesca (Smn) by the year they were set
Year set	Standing records
1940	15
1941	32
1942	90
1943	43
1944	72
1945	38
1946	27
1947	20
1948	21
1949	21
1950	2
1951	7
1952	3
1953	18
1954	9
1955	8
1956	12
1957	11
1958	18
1959	15
1960	14
1961	14
1962	70
1963	336
1964	197
1965	44
1966	30
1967	54
1968	73
1969	26
1970	46
1971	13
1972	26
1973	39

Wettest Day of Each Month

Aug: 79.8 mm (3.1 in)

The wettest day on record for each calendar month at Viesca (Smn). The most was 79.8 mm (3.1 in) on 12 August 1963.

Record daily precipitation for each month at Viesca (Smn)
Month	Record daily precipitation (mm)	Date
Jan	35.8 mm (1.4 in)	30 January 1945
Feb	23.9 mm (0.9 in)	11 February 1945
Mar	27.9 mm (1.1 in)	3 March 1968
Apr	34.8 mm (1.4 in)	22 April 1948
May	30.2 mm (1.2 in)	24 May 1941
Jun	47.0 mm (1.9 in)	21 June 1971
Jul	34.8 mm (1.4 in)	26 July 1949
Aug	79.8 mm (3.1 in)	12 August 1963
Sep	46.0 mm (1.8 in)	22 September 1972
Oct	46.0 mm (1.8 in)	6 October 1947
Nov	25.4 mm (1.0 in)	27 November 1940
Dec	15.0 mm (0.6 in)	2 December 1965

Period of Record Coverage

1940 to 1973

34 years of record at Viesca (Smn), 1940 to 1973. 2 years have data for under 90 percent of days and are left out of rankings: 1940, 1973.

Days with data per year at Viesca (Smn)
Year	Days with data	Share of year	Complete
1940	238	65%	No
1941	363	99%	Yes
1942	346	95%	Yes
1943	362	99%	Yes
1944	363	99%	Yes
1945	363	99%	Yes
1946	365	100%	Yes
1947	365	100%	Yes
1948	363	99%	Yes
1949	364	100%	Yes
1950	365	100%	Yes
1951	364	100%	Yes
1952	366	100%	Yes
1953	365	100%	Yes
1954	365	100%	Yes
1955	363	99%	Yes
1956	365	100%	Yes
1957	364	100%	Yes
1958	365	100%	Yes
1959	364	100%	Yes
1960	364	99%	Yes
1961	364	100%	Yes
1962	363	99%	Yes
1963	340	93%	Yes
1964	359	98%	Yes
1965	359	98%	Yes
1966	365	100%	Yes
1967	365	100%	Yes
1968	336	92%	Yes
1969	362	99%	Yes
1970	362	99%	Yes
1971	335	92%	Yes
1972	366	100%	Yes
1973	273	75%	No

Latest Records

Latest records at Viesca (Smn)
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
27 September 1973	Viesca (Smn), MX	daily low max	20.6 C (69.1 F)	3.3 C (5.9 F)	31 years	20 of 100 (Routine)
26 September 1973	Viesca (Smn), MX	daily rain	5.8 mm (0.23 in)	1.0 mm (0.04 in)	3 years	4 of 100 (Routine)
14 September 1973	Viesca (Smn), MX	daily rain	19.8 mm (0.8 in)	4.8 mm (0.19 in)	15 years	12 of 100 (Routine)
13 September 1973	Viesca (Smn), MX	daily rain	26.9 mm (1.1 in)	11.9 mm (0.5 in)	24 years	23 of 100 (Routine)
24 August 1973	Viesca (Smn), MX	monthly low min (Tie)	12.8 C (55.0 F)	tie	6 years	3 of 100 (Routine)
23 August 1973	Viesca (Smn), MX	monthly low min (Tie)	12.8 C (55.0 F)	tie	6 years	3 of 100 (Routine)
23 August 1973	Viesca (Smn), MX	daily low max (Tie)	30.0 C (86.0 F)	tie	2 years	0 of 100 (Routine)
18 August 1973	Viesca (Smn), MX	daily low max (Tie)	26.7 C (80.1 F)	tie	6 years	1 of 100 (Routine)
16 August 1973	Viesca (Smn), MX	daily low max	27.8 C (82.0 F)	2.2 C (4.0 F)	32 years	18 of 100 (Routine)
15 August 1973	Viesca (Smn), MX	daily low max	27.8 C (82.0 F)	1.1 C (2.0 F)	12 years	9 of 100 (Routine)
14 August 1973	Viesca (Smn), MX	daily low max	25.6 C (78.1 F)	1.1 C (2.0 F)	18 years	11 of 100 (Routine)
11 August 1973	Viesca (Smn), MX	daily low max	27.8 C (82.0 F)	1.1 C (2.0 F)	24 years	13 of 100 (Routine)
10 August 1973	Viesca (Smn), MX	daily low max	26.7 C (80.1 F)	1.1 C (2.0 F)	24 years	13 of 100 (Routine)
9 August 1973	Viesca (Smn), MX	daily low max	25.6 C (78.1 F)	3.3 C (5.9 F)	24 years	20 of 100 (Routine)
8 August 1973	Viesca (Smn), MX	daily low max	26.7 C (80.1 F)	2.2 C (4.0 F)	24 years	16 of 100 (Routine)
7 August 1973	Viesca (Smn), MX	daily low max	25.6 C (78.1 F)	2.2 C (4.0 F)	2 years	9 of 100 (Routine)
6 August 1973	Viesca (Smn), MX	daily low max (Tie)	27.8 C (82.0 F)	tie	2 years	0 of 100 (Routine)
4 August 1973	Viesca (Smn), MX	daily low max	27.8 C (82.0 F)	2.8 C (5.0 F)	28 years	19 of 100 (Routine)
2 August 1973	Viesca (Smn), MX	daily low max	25.6 C (78.1 F)	1.1 C (2.0 F)	32 years	15 of 100 (Routine)
2 August 1973	Viesca (Smn), MX	daily low min (Tie)	13.9 C (57.0 F)	tie	4 years	1 of 100 (Routine)

Climate Trend

27 complete years, 1941 to 1972

One stripe for each of 27 complete years at Viesca (Smn), 1941 to 1972. Blue stripes are years cooler than the station's own mean of 22.2 C (72.0 F); red stripes are warmer. The coolest year was 1944, at 19.3 C (66.8 F), and the warmest was 1964, at 28.9 C (84.0 F). The strongest colour marks a difference of 6.7 C (12.1 F).

Annual mean temperature at Viesca (Smn) as warming stripes, 1941 to 1972
Year	Annual mean temperature	Difference from the station mean
1941	20.8 C	-1.44 C
1943	20.5 C	-1.71 C
1944	19.3 C	-2.87 C
1945	21.3 C	-0.92 C
1946	21.3 C	-0.95 C
1948	22.1 C	-0.12 C
1949	22.7 C	+0.46 C
1950	23.0 C	+0.80 C
1951	23.1 C	+0.89 C
1952	22.6 C	+0.44 C
1953	21.9 C	-0.33 C
1954	22.9 C	+0.68 C
1955	21.9 C	-0.26 C
1956	22.2 C	+0.04 C
1957	22.9 C	+0.66 C
1958	21.8 C	-0.43 C
1959	21.8 C	-0.40 C
1960	21.7 C	-0.52 C
1961	22.0 C	-0.22 C
1962	24.2 C	+2.03 C
1964	28.9 C	+6.69 C
1965	25.4 C	+3.18 C
1966	21.7 C	-0.47 C
1967	21.5 C	-0.75 C
1969	20.9 C	-1.27 C
1970	20.3 C	-1.93 C
1972	21.0 C	-1.19 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

1940 to 1973

Yearly extremes at Viesca (Smn): the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	45.0 C (113.0 F)	1962	38.9 C (102.0 F)	34
Coldest night (TNn)	-10.6 C (12.9 F)	1941	0.6 C (33.1 F)	34
Wettest day (Rx1day)	79.8 mm (3.1 in)	1963	29.5 mm (1.2 in)	34
Wettest five days (Rx5day)	97.6 mm (3.8 in)	1963	38.3 mm (1.5 in)	34
Longest dry spell (CDD)	154 days	1942	93 days	34

Hottest day (TXx)

The hottest day of the year at Viesca (Smn), 1940 to 1973. The record is 45.0 C (113.0 F) in 1962, marked on the chart; the median year is 38.9 C (102.0 F).

Hottest day (TXx) at Viesca (Smn) by year
Year	Hottest day (TXx)
1940	40.0 C (104.0 F)
1941	39.4 C (102.9 F)
1942	40.0 C (104.0 F)
1943	36.1 C (97.0 F)
1944	35.6 C (96.1 F)
1945	38.9 C (102.0 F)
1946	36.7 C (98.1 F)
1947	37.8 C (100.0 F)
1948	37.8 C (100.0 F)
1949	37.8 C (100.0 F)
1950	35.6 C (96.1 F)
1951	37.8 C (100.0 F)
1952	35.6 C (96.1 F)
1953	38.9 C (102.0 F)
1954	38.9 C (102.0 F)
1955	38.9 C (102.0 F)
1956	36.7 C (98.1 F)
1957	37.8 C (100.0 F)
1958	36.7 C (98.1 F)
1959	36.7 C (98.1 F)
1960	38.9 C (102.0 F)
1961	38.9 C (102.0 F)
1962	45.0 C (113.0 F)
1963	45.0 C (113.0 F)
1964	42.8 C (109.0 F)
1965	40.0 C (104.0 F)
1966	43.9 C (111.0 F)
1967	40.0 C (104.0 F)
1968	38.9 C (102.0 F)
1969	40.0 C (104.0 F)
1970	40.0 C (104.0 F)
1971	38.9 C (102.0 F)
1972	38.9 C (102.0 F)
1973	36.7 C (98.1 F)

Coldest night (TNn)

The coldest night of the year at Viesca (Smn), 1940 to 1973. The record is -10.6 C (12.9 F) in 1941, marked on the chart; the median year is 0.6 C (33.1 F).

Coldest night (TNn) at Viesca (Smn) by year
Year	Coldest night (TNn)
1940	2.2 C (36.0 F)
1941	-10.6 C (12.9 F)
1942	-3.9 C (25.0 F)
1943	0.0 C (32.0 F)
1944	0.0 C (32.0 F)
1945	0.6 C (33.1 F)
1946	0.6 C (33.1 F)
1947	-3.3 C (26.1 F)
1948	0.0 C (32.0 F)
1949	-2.2 C (28.0 F)
1950	2.8 C (37.0 F)
1951	-6.1 C (21.0 F)
1952	2.8 C (37.0 F)
1953	0.6 C (33.1 F)
1954	1.7 C (35.1 F)
1955	-2.2 C (28.0 F)
1956	-4.4 C (24.1 F)
1957	-1.1 C (30.0 F)
1958	-1.1 C (30.0 F)
1959	2.8 C (37.0 F)
1960	0.6 C (33.1 F)
1961	0.6 C (33.1 F)
1962	-8.3 C (17.1 F)
1963	0.6 C (33.1 F)
1964	6.7 C (44.1 F)
1965	3.9 C (39.0 F)
1966	1.7 C (35.1 F)
1967	0.0 C (32.0 F)
1968	0.6 C (33.1 F)
1969	0.6 C (33.1 F)
1970	1.7 C (35.1 F)
1971	0.6 C (33.1 F)
1972	0.6 C (33.1 F)
1973	0.6 C (33.1 F)

Wettest day (Rx1day)

The wettest day of the year at Viesca (Smn), 1940 to 1973. The record is 79.8 mm (3.1 in) in 1963, marked on the chart; the median year is 29.5 mm (1.2 in).

Wettest day (Rx1day) at Viesca (Smn) by year
Year	Wettest day (Rx1day)
1940	25.4 mm (1.0 in)
1941	30.2 mm (1.2 in)
1942	29.0 mm (1.1 in)
1943	26.9 mm (1.1 in)
1944	18.8 mm (0.7 in)
1945	35.8 mm (1.4 in)
1946	24.9 mm (1.0 in)
1947	46.0 mm (1.8 in)
1948	34.8 mm (1.4 in)
1949	34.8 mm (1.4 in)
1950	15.7 mm (0.6 in)
1951	16.8 mm (0.7 in)
1952	14.5 mm (0.6 in)
1953	35.8 mm (1.4 in)
1954	19.8 mm (0.8 in)
1955	14.0 mm (0.6 in)
1956	6.4 mm (0.25 in)
1957	19.8 mm (0.8 in)
1958	33.3 mm (1.3 in)
1959	31.8 mm (1.3 in)
1960	33.8 mm (1.3 in)
1961	17.8 mm (0.7 in)
1962	8.4 mm (0.33 in)
1963	79.8 mm (3.1 in)
1964	20.8 mm (0.8 in)
1965	36.8 mm (1.4 in)
1966	45.0 mm (1.8 in)
1967	30.0 mm (1.2 in)
1968	31.0 mm (1.2 in)
1969	22.9 mm (0.9 in)
1970	45.0 mm (1.8 in)
1971	47.0 mm (1.9 in)
1972	46.0 mm (1.8 in)
1973	27.9 mm (1.1 in)

Wettest five days (Rx5day)

The wettest five days of the year at Viesca (Smn), 1940 to 1973. The record is 97.6 mm (3.8 in) in 1963, marked on the chart; the median year is 38.3 mm (1.5 in).

Wettest five days (Rx5day) at Viesca (Smn) by year
Year	Wettest five days (Rx5day)
1940	41.7 mm (1.6 in)
1941	38.3 mm (1.5 in)
1942	29.0 mm (1.1 in)
1943	44.7 mm (1.8 in)
1944	38.3 mm (1.5 in)
1945	35.8 mm (1.4 in)
1946	32.1 mm (1.3 in)
1947	46.0 mm (1.8 in)
1948	60.7 mm (2.4 in)
1949	87.4 mm (3.4 in)
1950	18.5 mm (0.7 in)
1951	17.6 mm (0.7 in)
1952	15.5 mm (0.6 in)
1953	37.0 mm (1.5 in)
1954	24.6 mm (1.0 in)
1955	22.9 mm (0.9 in)
1956	6.4 mm (0.25 in)
1957	19.8 mm (0.8 in)
1958	53.1 mm (2.1 in)
1959	31.8 mm (1.3 in)
1960	48.6 mm (1.9 in)
1961	17.8 mm (0.7 in)
1962	8.4 mm (0.33 in)
1963	97.6 mm (3.8 in)
1964	22.7 mm (0.9 in)
1965	66.3 mm (2.6 in)
1966	57.7 mm (2.3 in)
1967	33.6 mm (1.3 in)
1968	76.2 mm (3.0 in)
1969	38.6 mm (1.5 in)
1970	57.7 mm (2.3 in)
1971	57.5 mm (2.3 in)
1972	52.9 mm (2.1 in)
1973	46.7 mm (1.8 in)

Longest dry spell (CDD)

The longest dry spell of the year at Viesca (Smn), 1940 to 1973. The record is 154 days in 1942, marked on the chart; the median year is 93 days.

Longest dry spell (CDD) at Viesca (Smn) by year
Year	Longest dry spell (CDD)
1940	38 days
1941	45 days
1942	154 days
1943	106 days
1944	73 days
1945	65 days
1946	53 days
1947	119 days
1948	66 days
1949	69 days
1950	126 days
1951	99 days
1952	107 days
1953	113 days
1954	132 days
1955	110 days
1956	118 days
1957	72 days
1958	102 days
1959	70 days
1960	107 days
1961	81 days
1962	82 days
1963	88 days
1964	106 days
1965	100 days
1966	66 days
1967	53 days
1968	65 days
1969	129 days
1970	98 days
1971	78 days
1972	99 days
1973	71 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, 1941 to 1972

A day with at least 28.1 mm (1.1 in) of rain is expected about once in 2 years. A day with at least 70.2 mm (2.8 in) of rain is expected about once in 100 years.

Rainfall return levels at Viesca (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	28.1 mm (1.1 in)
5 years	40.8 mm (1.6 in)
10 years	48.6 mm (1.9 in)
25 years	57.8 mm (2.3 in)
50 years	64.2 mm (2.5 in)	Longer than the 32 years of record
100 years	70.2 mm (2.8 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 1941 to 1972.

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: 79.8 mm (3.1 in) in 1963; 47.0 mm (1.9 in) in 1971; 46.0 mm (1.8 in) in 1947.

Download the Data

Data for Viesca (Smn) standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Viesca (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).