Santiago Astata (Smn) Weather Records (MXN00020132)

Record envelope, standing records and threshold days for Santiago Astata (Smn) (MXN00020132), Mexico, with 35 years of record.

Key Facts for Santiago Astata (Smn)

Santiago Astata (Smn) (MXN00020132) is a weather station in Mexico at 15.97 latitude and -95.67 longitude, 30 m (98 ft) above sea level.
The station reports from 1961 to 1995, 35 years of record.
1,464 records set at Santiago Astata (Smn) still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Santiago Astata (Smn) set a daily record precipitation of 5.3 mm (0.21 in) on 10 September 1995.

About the Station

Location: Mexico, 15.97 latitude, -95.67 longitude.
Elevation: 30 m (98 ft).
Period of record: 1961 to 1995, 35 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 Santiago Astata (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 Santiago Astata (Smn), with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	47.8 C (118.0 F)	5.0 C (41.0 F)	n/a	n/a
Feb	47.8 C (118.0 F)	3.9 C (39.0 F)	n/a	n/a
Mar	48.9 C (120.0 F)	6.7 C (44.1 F)	n/a	n/a
Apr	45.6 C (114.1 F)	5.6 C (42.1 F)	n/a	n/a
May	46.7 C (116.1 F)	5.6 C (42.1 F)	n/a	n/a
Jun	46.7 C (116.1 F)	5.6 C (42.1 F)	n/a	n/a
Jul	47.8 C (118.0 F)	3.3 C (37.9 F)	n/a	n/a
Aug	46.7 C (116.1 F)	5.0 C (41.0 F)	n/a	n/a
Sep	48.9 C (120.0 F)	5.0 C (41.0 F)	n/a	n/a
Oct	46.7 C (116.1 F)	5.0 C (41.0 F)	n/a	n/a
Nov	46.7 C (116.1 F)	6.7 C (44.1 F)	n/a	n/a
Dec	47.8 C (118.0 F)	3.9 C (39.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Santiago Astata (Smn) still stand. 1989 holds the most, with 235.

Standing records at Santiago Astata (Smn) by the year they were set
Year set	Standing records
1968	2
1974	1
1975	133
1976	136
1977	80
1978	145
1979	171
1980	94
1981	56
1982	31
1983	28
1984	23
1985	14
1986	21
1987	6
1988	38
1989	235
1991	42
1993	80
1994	4
1995	124

Wettest Day of Each Month

Sep: 131.8 mm (5.2 in)

The wettest day on record for each calendar month at Santiago Astata (Smn). The most was 131.8 mm (5.2 in) on 8 September 1968.

Record daily precipitation for each month at Santiago Astata (Smn)
Month	Record daily precipitation (mm)	Date
Jan	7.9 mm (0.31 in)	18 January 1979
Feb	31.0 mm (1.2 in)	2 February 1961
Mar	6.4 mm (0.25 in)	7 March 1995
Apr	2.8 mm (0.11 in)	21 April 1979
May	52.8 mm (2.1 in)	17 May 1968
Jun	128.8 mm (5.1 in)	14 June 1965
Jul	98.8 mm (3.9 in)	14 July 1962
Aug	97.8 mm (3.9 in)	30 August 1962
Sep	131.8 mm (5.2 in)	8 September 1968
Oct	73.9 mm (2.9 in)	19 October 1965
Nov	11.4 mm (0.4 in)	3 November 1961
Dec	7.4 mm (0.29 in)	26 December 1994

Period of Record Coverage

1974 to 1995

20 years of record at Santiago Astata (Smn), 1974 to 1995. 9 years have data for under 90 percent of days and are left out of rankings: 1974, 1975, 1987, 1988, 1989, 1991, 1993, 1994 and others.

Days with data per year at Santiago Astata (Smn)
Year	Days with data	Share of year	Complete
1974	1	0%	No
1975	224	61%	No
1976	359	98%	Yes
1977	360	99%	Yes
1978	364	100%	Yes
1979	362	99%	Yes
1980	366	100%	Yes
1981	364	100%	Yes
1982	365	100%	Yes
1983	365	100%	Yes
1984	365	100%	Yes
1985	365	100%	Yes
1986	364	100%	Yes
1987	243	67%	No
1988	187	51%	No
1989	272	75%	No
1991	82	22%	No
1993	243	67%	No
1994	7	2%	No
1995	225	62%	No

Latest Records

Latest records at Santiago Astata (Smn)
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
10 September 1995	Santiago Astata (Smn), MX	daily rain	5.3 mm (0.21 in)	4.5 mm (0.18 in)	20 years	10 of 100 (Routine)
9 September 1995	Santiago Astata (Smn), MX	daily rain	6.1 mm (0.24 in)	4.3 mm (0.17 in)	16 years	9 of 100 (Routine)
18 August 1995	Santiago Astata (Smn), MX	daily rain	8.9 mm (0.35 in)	5.1 mm (0.20 in)	16 years	11 of 100 (Routine)
16 August 1995	Santiago Astata (Smn), MX	daily rain	2.0 mm (0.08 in)	2.0 mm (0.08 in)	33 years	14 of 100 (Routine)
14 August 1995	Santiago Astata (Smn), MX	daily rain	6.6 mm (0.26 in)	4.3 mm (0.17 in)	8 years	7 of 100 (Routine)
11 August 1995	Santiago Astata (Smn), MX	daily rain	7.4 mm (0.29 in)	5.1 mm (0.20 in)	14 years	10 of 100 (Routine)
15 July 1995	Santiago Astata (Smn), MX	daily rain	2.3 mm (0.09 in)	2.3 mm (0.09 in)	33 years	14 of 100 (Routine)
2 June 1995	Santiago Astata (Smn), MX	daily rain	3.6 mm (0.14 in)	0.6 mm (0.02 in)	13 years	7 of 100 (Routine)
20 May 1995	Santiago Astata (Smn), MX	daily rain	3.3 mm (0.13 in)	3.3 mm (0.13 in)	33 years	16 of 100 (Routine)
19 May 1995	Santiago Astata (Smn), MX	daily rain	3.6 mm (0.14 in)	3.6 mm (0.14 in)	33 years	16 of 100 (Routine)
11 May 1995	Santiago Astata (Smn), MX	daily rain	2.3 mm (0.09 in)	2.3 mm (0.09 in)	33 years	15 of 100 (Routine)
10 May 1995	Santiago Astata (Smn), MX	daily rain	1.8 mm (0.07 in)	1.8 mm (0.07 in)	33 years	14 of 100 (Routine)
7 March 1995	Santiago Astata (Smn), MX	monthly rain	6.4 mm (0.25 in)	4.9 mm (0.19 in)	11 years	20 of 100 (Routine)
26 December 1994	Santiago Astata (Smn), MX	monthly rain	7.4 mm (0.29 in)	4.1 mm (0.16 in)	7 years	19 of 100 (Routine)

Climate Trend

11 complete years, 1976 to 1986

One stripe for each of 11 complete years at Santiago Astata (Smn), 1976 to 1986. Blue stripes are years cooler than the station's own mean of 26.1 C (78.9 F); red stripes are warmer. The coolest year was 1986, at 22.2 C (72.0 F), and the warmest was 1976, at 28.6 C (83.5 F). The strongest colour marks a difference of 3.9 C (7.0 F).

Annual mean temperature at Santiago Astata (Smn) as warming stripes, 1976 to 1986
Year	Annual mean temperature	Difference from the station mean
1976	28.6 C	+2.56 C
1977	28.5 C	+2.49 C
1978	27.8 C	+1.78 C
1979	26.4 C	+0.36 C
1980	27.4 C	+1.30 C
1981	25.3 C	-0.75 C
1982	25.6 C	-0.42 C
1983	25.6 C	-0.50 C
1984	25.0 C	-1.10 C
1985	24.2 C	-1.89 C
1986	22.2 C	-3.81 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

1961 to 1995

Yearly extremes at Santiago Astata (Smn): the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	48.9 C (120.0 F)	1975	39.7 C (103.5 F)	20
Coldest night (TNn)	3.3 C (37.9 F)	1968	7.8 C (46.0 F)	21
Wettest day (Rx1day)	131.8 mm (5.2 in)	1968	18.0 mm (0.7 in)	33
Wettest five days (Rx5day)	206.8 mm (8.1 in)	1965	20.3 mm (0.8 in)	33
Longest dry spell (CDD)	169 days	1970	143 days	33

Hottest day (TXx)

The hottest day of the year at Santiago Astata (Smn), 1961 to 1995. The record is 48.9 C (120.0 F) in 1975, marked on the chart; the median year is 39.7 C (103.5 F).

Hottest day (TXx) at Santiago Astata (Smn) by year
Year	Hottest day (TXx)
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	27.2 C (81.0 F)
1975	48.9 C (120.0 F)
1976	46.7 C (116.1 F)
1977	47.8 C (118.0 F)
1978	48.9 C (120.0 F)
1979	47.8 C (118.0 F)
1980	46.7 C (116.1 F)
1981	42.8 C (109.0 F)
1982	43.9 C (111.0 F)
1983	40.0 C (104.0 F)
1984	45.6 C (114.1 F)
1985	37.8 C (100.0 F)
1986	35.0 C (95.0 F)
1987	33.9 C (93.0 F)
1988	31.7 C (89.1 F)
1989	28.9 C (84.0 F)
1991	25.0 C (77.0 F)
1993	30.6 C (87.1 F)
1994	23.9 C (75.0 F)
1995	39.4 C (102.9 F)

Coldest night (TNn)

The coldest night of the year at Santiago Astata (Smn), 1961 to 1995. The record is 3.3 C (37.9 F) in 1968, marked on the chart; the median year is 7.8 C (46.0 F).

Coldest night (TNn) at Santiago Astata (Smn) by year
Year	Coldest night (TNn)
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	n/a
1966	n/a
1967	n/a
1968	3.3 C (37.9 F)
1969	n/a
1970	n/a
1971	n/a
1972	n/a
1973	n/a
1974	21.1 C (70.0 F)
1975	8.9 C (48.0 F)
1976	5.6 C (42.1 F)
1977	8.9 C (48.0 F)
1978	5.0 C (41.0 F)
1979	3.9 C (39.0 F)
1980	5.0 C (41.0 F)
1981	6.7 C (44.1 F)
1982	8.9 C (48.0 F)
1983	6.7 C (44.1 F)
1984	7.8 C (46.0 F)
1985	8.9 C (48.0 F)
1986	6.7 C (44.1 F)
1987	8.9 C (48.0 F)
1988	8.9 C (48.0 F)
1989	7.8 C (46.0 F)
1991	6.7 C (44.1 F)
1993	6.7 C (44.1 F)
1994	7.8 C (46.0 F)
1995	7.8 C (46.0 F)

Wettest day (Rx1day)

The wettest day of the year at Santiago Astata (Smn), 1961 to 1995. The record is 131.8 mm (5.2 in) in 1968, marked on the chart; the median year is 18.0 mm (0.7 in).

Wettest day (Rx1day) at Santiago Astata (Smn) by year
Year	Wettest day (Rx1day)
1961	97.8 mm (3.9 in)
1962	98.8 mm (3.9 in)
1963	84.8 mm (3.3 in)
1964	70.9 mm (2.8 in)
1965	128.8 mm (5.1 in)
1966	59.9 mm (2.4 in)
1967	79.8 mm (3.1 in)
1968	131.8 mm (5.2 in)
1969	111.0 mm (4.4 in)
1970	21.1 mm (0.8 in)
1971	77.7 mm (3.1 in)
1972	17.8 mm (0.7 in)
1973	86.9 mm (3.4 in)
1974	18.0 mm (0.7 in)
1975	3.6 mm (0.14 in)
1976	2.8 mm (0.11 in)
1977	19.8 mm (0.8 in)
1978	19.8 mm (0.8 in)
1979	8.9 mm (0.35 in)
1980	6.4 mm (0.25 in)
1981	31.8 mm (1.3 in)
1982	2.8 mm (0.11 in)
1983	20.3 mm (0.8 in)
1984	5.8 mm (0.23 in)
1985	3.6 mm (0.14 in)
1986	5.3 mm (0.21 in)
1987	3.6 mm (0.14 in)
1988	0.0 mm (0.00 in)
1989	8.6 mm (0.34 in)
1991	6.1 mm (0.24 in)
1993	7.1 mm (0.28 in)
1994	7.4 mm (0.29 in)
1995	9.4 mm (0.37 in)

Wettest five days (Rx5day)

The wettest five days of the year at Santiago Astata (Smn), 1961 to 1995. The record is 206.8 mm (8.1 in) in 1965, marked on the chart; the median year is 20.3 mm (0.8 in).

Wettest five days (Rx5day) at Santiago Astata (Smn) by year
Year	Wettest five days (Rx5day)
1961	160.6 mm (6.3 in)
1962	98.8 mm (3.9 in)
1963	188.5 mm (7.4 in)
1964	75.7 mm (3.0 in)
1965	206.8 mm (8.1 in)
1966	116.8 mm (4.6 in)
1967	133.6 mm (5.3 in)
1968	180.6 mm (7.1 in)
1969	118.9 mm (4.7 in)
1970	29.2 mm (1.1 in)
1971	109.5 mm (4.3 in)
1972	17.8 mm (0.7 in)
1973	172.5 mm (6.8 in)
1974	29.7 mm (1.2 in)
1975	6.7 mm (0.26 in)
1976	6.7 mm (0.26 in)
1977	19.8 mm (0.8 in)
1978	19.8 mm (0.8 in)
1979	20.1 mm (0.8 in)
1980	6.4 mm (0.25 in)
1981	34.6 mm (1.4 in)
1982	4.6 mm (0.18 in)
1983	20.3 mm (0.8 in)
1984	15.5 mm (0.6 in)
1985	5.9 mm (0.23 in)
1986	10.4 mm (0.4 in)
1987	6.9 mm (0.27 in)
1988	0.0 mm (0.00 in)
1989	16.0 mm (0.6 in)
1991	17.3 mm (0.7 in)
1993	22.9 mm (0.9 in)
1994	7.4 mm (0.29 in)
1995	36.9 mm (1.5 in)

Longest dry spell (CDD)

The longest dry spell of the year at Santiago Astata (Smn), 1961 to 1995. The record is 169 days in 1970, marked on the chart; the median year is 143 days.

Longest dry spell (CDD) at Santiago Astata (Smn) by year
Year	Longest dry spell (CDD)
1961	100 days
1962	153 days
1963	158 days
1964	152 days
1965	153 days
1966	162 days
1967	160 days
1968	100 days
1969	166 days
1970	169 days
1971	159 days
1972	127 days
1973	83 days
1974	125 days
1975	110 days
1976	163 days
1977	159 days
1978	147 days
1979	83 days
1980	103 days
1981	151 days
1982	165 days
1983	104 days
1984	97 days
1985	151 days
1986	98 days
1987	119 days
1988	92 days
1989	143 days
1991	38 days
1993	164 days
1994	25 days
1995	90 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 Santiago Astata (Smn) standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Santiago Astata (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 2026-10-14 (14 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).