San Isidro Canoas Altas Weather Records (MXN00021073)

Record envelope, standing records and threshold days for San Isidro Canoas Altas (MXN00021073), Mexico, with 44 years of record.

Key Facts for San Isidro Canoas Altas

San Isidro Canoas Altas (MXN00021073) is a weather station in Mexico at 18.97 latitude and -97.35 longitude, 3,080 m (10,104 ft) above sea level.
The station reports from 1966 to 2009, 44 years of record.
1,464 records set at San Isidro Canoas Altas still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
San Isidro Canoas Altas set a daily record precipitation of 2.5 mm (0.10 in) on 20 December 2009.

About the Station

Location: Mexico, 18.97 latitude, -97.35 longitude.
Elevation: 3,080 m (10,104 ft).
Period of record: 1966 to 2009, 44 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 Isidro Canoas Altas. 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 Isidro Canoas Altas, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	35.0 C (95.0 F)	-6.1 C (21.0 F)	n/a	n/a
Feb	35.0 C (95.0 F)	-7.2 C (19.0 F)	n/a	n/a
Mar	33.9 C (93.0 F)	-5.0 C (23.0 F)	n/a	n/a
Apr	28.9 C (84.0 F)	-5.0 C (23.0 F)	n/a	n/a
May	26.7 C (80.1 F)	0.0 C (32.0 F)	n/a	n/a
Jun	24.4 C (75.9 F)	0.0 C (32.0 F)	n/a	n/a
Jul	23.9 C (75.0 F)	0.0 C (32.0 F)	n/a	n/a
Aug	25.0 C (77.0 F)	0.0 C (32.0 F)	n/a	n/a
Sep	21.7 C (71.1 F)	0.0 C (32.0 F)	n/a	n/a
Oct	25.0 C (77.0 F)	0.0 C (32.0 F)	n/a	n/a
Nov	23.9 C (75.0 F)	-3.3 C (26.1 F)	n/a	n/a
Dec	26.7 C (80.1 F)	-1.1 C (30.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at San Isidro Canoas Altas still stand. 2002 holds the most, with 498.

All-Time Record Progression

1 new records

1 all-time records were set at San Isidro Canoas Altas between 22 August 2007 and 22 August 2007. Each dot is a new record.

Wettest Day of Each Month

Aug: 115.1 mm (4.5 in)

The wettest day on record for each calendar month at San Isidro Canoas Altas. The most was 115.1 mm (4.5 in) on 22 August 2007.

Record daily precipitation for each month at San Isidro Canoas Altas
Month	Record daily precipitation (mm)	Date
Jan	29.2 mm (1.1 in)	31 January 1992
Feb	49.0 mm (1.9 in)	12 February 1983
Mar	36.8 mm (1.4 in)	13 March 1983
Apr	28.2 mm (1.1 in)	26 April 2001
May	72.4 mm (2.9 in)	5 May 1985
Jun	79.8 mm (3.1 in)	8 June 1992
Jul	73.9 mm (2.9 in)	14 July 1988
Aug	115.1 mm (4.5 in)	22 August 2007
Sep	62.0 mm (2.4 in)	22 September 1991
Oct	68.8 mm (2.7 in)	8 October 1976
Nov	24.9 mm (1.0 in)	22 November 1998
Dec	12.2 mm (0.5 in)	30 December 1995

Period of Record Coverage

2002 to 2009

8 years of record at San Isidro Canoas Altas, 2002 to 2009. 3 years have data for under 90 percent of days and are left out of rankings: 2007, 2008, 2009.

Days with data per year at San Isidro Canoas Altas
Year	Days with data	Share of year	Complete
2002	350	96%	Yes
2003	365	100%	Yes
2004	366	100%	Yes
2005	365	100%	Yes
2006	365	100%	Yes
2007	307	84%	No
2008	319	87%	No
2009	318	87%	No

Latest Records

Latest records at San Isidro Canoas Altas
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 December 2009	San Isidro Canoas Altas, MX	daily rain	2.5 mm (0.10 in)	1.5 mm (0.06 in)	4 years	9 of 100 (Routine)
16 December 2009	San Isidro Canoas Altas, MX	daily rain	1.3 mm (0.05 in)	1.3 mm (0.05 in)	43 years	19 of 100 (Routine)
24 October 2009	San Isidro Canoas Altas, MX	daily rain	26.9 mm (1.1 in)	10.1 mm (0.4 in)	24 years	22 of 100 (Routine)
14 September 2009	San Isidro Canoas Altas, MX	daily rain	46.5 mm (1.8 in)	25.7 mm (1.0 in)	24 years	41 of 100 (Notable)
11 September 2009	San Isidro Canoas Altas, MX	daily rain	25.4 mm (1.0 in)	3.6 mm (0.14 in)	7 years	10 of 100 (Routine)
10 September 2009	San Isidro Canoas Altas, MX	daily rain	58.4 mm (2.3 in)	43.2 mm (1.7 in)	7 years	46 of 100 (Notable)
22 May 2009	San Isidro Canoas Altas, MX	daily rain	36.1 mm (1.4 in)	16.3 mm (0.6 in)	39 years	34 of 100 (Routine)
16 May 2009	San Isidro Canoas Altas, MX	daily rain	32.3 mm (1.3 in)	14.5 mm (0.6 in)	40 years	33 of 100 (Routine)
21 February 2009	San Isidro Canoas Altas, MX	daily rain	15.0 mm (0.6 in)	9.2 mm (0.36 in)	31 years	20 of 100 (Routine)
25 September 2008	San Isidro Canoas Altas, MX	daily rain	57.2 mm (2.3 in)	26.0 mm (1.0 in)	11 years	39 of 100 (Notable)
19 August 2008	San Isidro Canoas Altas, MX	daily rain	41.1 mm (1.6 in)	22.3 mm (0.9 in)	27 years	39 of 100 (Notable)
10 August 2008	San Isidro Canoas Altas, MX	daily rain	23.9 mm (0.9 in)	3.8 mm (0.15 in)	33 years	17 of 100 (Routine)
30 July 2008	San Isidro Canoas Altas, MX	daily rain	19.3 mm (0.8 in)	10.4 mm (0.4 in)	33 years	20 of 100 (Routine)
8 July 2008	San Isidro Canoas Altas, MX	daily rain (Tie)	17.8 mm (0.7 in)	tie	23 years	2 of 100 (Routine)
17 June 2008	San Isidro Canoas Altas, MX	daily rain	20.1 mm (0.8 in)	0.3 mm (0.01 in)	27 years	12 of 100 (Routine)
4 June 2008	San Isidro Canoas Altas, MX	daily rain	21.3 mm (0.8 in)	1.5 mm (0.06 in)	22 years	11 of 100 (Routine)
4 December 2007	San Isidro Canoas Altas, MX	daily rain	3.8 mm (0.15 in)	3.8 mm (0.15 in)	40 years	19 of 100 (Routine)
24 November 2007	San Isidro Canoas Altas, MX	daily rain	7.1 mm (0.28 in)	7.1 mm (0.28 in)	40 years	20 of 100 (Routine)
22 October 2007	San Isidro Canoas Altas, MX	daily rain	21.1 mm (0.8 in)	5.9 mm (0.23 in)	10 years	13 of 100 (Routine)
22 August 2007	San Isidro Canoas Altas, MX	all-time rain	115.1 mm (4.5 in)	35.3 mm (1.4 in)	15 years	68 of 100 (Major)

Extremes by Year

1966 to 2009

Yearly extremes at San Isidro Canoas Altas: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	35.0 C (95.0 F)	2002	24.4 C (75.9 F)	8
Coldest night (TNn)	-7.2 C (19.0 F)	2002	-0.6 C (30.9 F)	8
Wettest day (Rx1day)	115.1 mm (4.5 in)	2007	35.1 mm (1.4 in)	41
Wettest five days (Rx5day)	192.8 mm (7.6 in)	1972	79.7 mm (3.1 in)	41
Longest dry spell (CDD)	128 days	1970	62 days	41

Hottest day (TXx)

The hottest day of the year at San Isidro Canoas Altas, 1966 to 2009. The record is 35.0 C (95.0 F) in 2002, marked on the chart; the median year is 24.4 C (75.9 F).

Hottest day (TXx) at San Isidro Canoas Altas by year
Year	Hottest day (TXx)
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	n/a
1986	n/a
1987	n/a
1988	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	n/a
1998	n/a
2000	n/a
2001	n/a
2002	35.0 C (95.0 F)
2003	26.7 C (80.1 F)
2004	22.2 C (72.0 F)
2005	24.4 C (75.9 F)
2006	23.3 C (73.9 F)
2007	23.3 C (73.9 F)
2008	25.0 C (77.0 F)
2009	24.4 C (75.9 F)

Coldest night (TNn)

The coldest night of the year at San Isidro Canoas Altas, 1966 to 2009. The record is -7.2 C (19.0 F) in 2002, marked on the chart; the median year is -0.6 C (30.9 F).

Coldest night (TNn) at San Isidro Canoas Altas by year
Year	Coldest night (TNn)
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	n/a
1986	n/a
1987	n/a
1988	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	n/a
1998	n/a
2000	n/a
2001	n/a
2002	-7.2 C (19.0 F)
2003	-0.6 C (30.9 F)
2004	-4.4 C (24.1 F)
2005	0.0 C (32.0 F)
2006	-0.6 C (30.9 F)
2007	0.0 C (32.0 F)
2008	0.0 C (32.0 F)
2009	-1.1 C (30.0 F)

Wettest day (Rx1day)

The wettest day of the year at San Isidro Canoas Altas, 1966 to 2009. The record is 115.1 mm (4.5 in) in 2007, marked on the chart; the median year is 35.1 mm (1.4 in).

Wettest day (Rx1day) at San Isidro Canoas Altas by year
Year	Wettest day (Rx1day)
1966	25.9 mm (1.0 in)
1967	39.9 mm (1.6 in)
1968	40.4 mm (1.6 in)
1969	25.7 mm (1.0 in)
1970	20.6 mm (0.8 in)
1971	25.4 mm (1.0 in)
1972	61.2 mm (2.4 in)
1973	33.8 mm (1.3 in)
1974	20.1 mm (0.8 in)
1975	38.6 mm (1.5 in)
1976	68.8 mm (2.7 in)
1977	19.8 mm (0.8 in)
1978	40.1 mm (1.6 in)
1979	21.3 mm (0.8 in)
1980	30.5 mm (1.2 in)
1981	21.1 mm (0.8 in)
1982	20.8 mm (0.8 in)
1983	49.0 mm (1.9 in)
1984	36.8 mm (1.4 in)
1985	72.4 mm (2.9 in)
1986	60.5 mm (2.4 in)
1987	34.8 mm (1.4 in)
1988	73.9 mm (2.9 in)
1991	62.0 mm (2.4 in)
1992	79.8 mm (3.1 in)
1993	25.4 mm (1.0 in)
1994	20.3 mm (0.8 in)
1995	25.4 mm (1.0 in)
1996	25.4 mm (1.0 in)
1997	31.2 mm (1.2 in)
1998	40.6 mm (1.6 in)
2000	25.1 mm (1.0 in)
2001	28.2 mm (1.1 in)
2002	34.8 mm (1.4 in)
2003	48.3 mm (1.9 in)
2004	35.1 mm (1.4 in)
2005	43.2 mm (1.7 in)
2006	35.1 mm (1.4 in)
2007	115.1 mm (4.5 in)
2008	57.2 mm (2.3 in)
2009	58.4 mm (2.3 in)

Wettest five days (Rx5day)

The wettest five days of the year at San Isidro Canoas Altas, 1966 to 2009. The record is 192.8 mm (7.6 in) in 1972, marked on the chart; the median year is 79.7 mm (3.1 in).

Wettest five days (Rx5day) at San Isidro Canoas Altas by year
Year	Wettest five days (Rx5day)
1966	77.5 mm (3.1 in)
1967	112.0 mm (4.4 in)
1968	160.1 mm (6.3 in)
1969	63.2 mm (2.5 in)
1970	88.4 mm (3.5 in)
1971	79.7 mm (3.1 in)
1972	192.8 mm (7.6 in)
1973	64.1 mm (2.5 in)
1974	49.4 mm (1.9 in)
1975	114.3 mm (4.5 in)
1976	132.3 mm (5.2 in)
1977	56.4 mm (2.2 in)
1978	94.7 mm (3.7 in)
1979	54.7 mm (2.2 in)
1980	105.2 mm (4.1 in)
1981	73.7 mm (2.9 in)
1982	80.3 mm (3.2 in)
1983	65.8 mm (2.6 in)
1984	131.8 mm (5.2 in)
1985	82.3 mm (3.2 in)
1986	149.3 mm (5.9 in)
1987	61.8 mm (2.4 in)
1988	73.9 mm (2.9 in)
1991	116.9 mm (4.6 in)
1992	140.6 mm (5.5 in)
1993	70.9 mm (2.8 in)
1994	53.1 mm (2.1 in)
1995	63.4 mm (2.5 in)
1996	65.9 mm (2.6 in)
1997	67.1 mm (2.6 in)
1998	86.8 mm (3.4 in)
2000	74.7 mm (2.9 in)
2001	60.3 mm (2.4 in)
2002	94.4 mm (3.7 in)
2003	87.8 mm (3.5 in)
2004	67.3 mm (2.6 in)
2005	134.9 mm (5.3 in)
2006	76.9 mm (3.0 in)
2007	172.0 mm (6.8 in)
2008	78.4 mm (3.1 in)
2009	134.1 mm (5.3 in)

Longest dry spell (CDD)

The longest dry spell of the year at San Isidro Canoas Altas, 1966 to 2009. The record is 128 days in 1970, marked on the chart; the median year is 62 days.

Longest dry spell (CDD) at San Isidro Canoas Altas by year
Year	Longest dry spell (CDD)
1966	74 days
1967	62 days
1968	29 days
1969	57 days
1970	128 days
1971	55 days
1972	36 days
1973	58 days
1974	57 days
1975	94 days
1976	81 days
1977	62 days
1978	28 days
1979	74 days
1980	34 days
1981	37 days
1982	60 days
1983	54 days
1984	31 days
1985	72 days
1986	44 days
1987	94 days
1988	69 days
1991	109 days
1992	50 days
1993	47 days
1994	80 days
1995	43 days
1996	63 days
1997	64 days
1998	78 days
2000	121 days
2001	59 days
2002	39 days
2003	70 days
2004	77 days
2005	71 days
2006	81 days
2007	32 days
2008	79 days
2009	52 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

33 years, 1967 to 2009

A day with at least 34.5 mm (1.4 in) of rain is expected about once in 2 years. A day with at least 128.9 mm (5.1 in) of rain is expected about once in 100 years.

Rainfall return levels at San Isidro Canoas Altas: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	34.5 mm (1.4 in)
5 years	51.5 mm (2.0 in)
10 years	65.4 mm (2.6 in)
25 years	86.9 mm (3.4 in)
50 years	106.3 mm (4.2 in)	Longer than the 33 years of record
100 years	128.9 mm (5.1 in)	Longer than the 33 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, 33 years of values from 1967 to 2009.

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: 115.1 mm (4.5 in) in 2007; 79.8 mm (3.1 in) in 1992; 72.4 mm (2.9 in) in 1985.

Download the Data

Data for San Isidro Canoas Altas standing records by year: CSV or JSON. Field meanings are on the data page.
Data for San Isidro Canoas Altas 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).