Puente San Isidro Weather Records (MXN00016100)

Record envelope, standing records and threshold days for Puente San Isidro (MXN00016100), Mexico, with 47 years of record.

Key Facts for Puente San Isidro

Puente San Isidro (MXN00016100) is a weather station in Mexico at 19.85 latitude and -101.52 longitude, 2,022 m (6,633 ft) above sea level.
The station reports from 1947 to 1993, 47 years of record.
1,464 records set at Puente San Isidro still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Puente San Isidro set a daily record high maximum temperature of 28.3 C (82.9 F) on 21 January 1993.

About the Station

Location: Mexico, 19.85 latitude, -101.52 longitude.
Elevation: 2,022 m (6,633 ft).
Period of record: 1947 to 1993, 47 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 Puente San Isidro. 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 Puente San Isidro, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	29.4 C (84.9 F)	-7.2 C (19.0 F)	n/a	n/a
Feb	31.7 C (89.1 F)	-7.2 C (19.0 F)	n/a	n/a
Mar	35.0 C (95.0 F)	-4.4 C (24.1 F)	n/a	n/a
Apr	35.0 C (95.0 F)	-2.2 C (28.0 F)	n/a	n/a
May	35.0 C (95.0 F)	0.0 C (32.0 F)	n/a	n/a
Jun	33.9 C (93.0 F)	4.4 C (39.9 F)	n/a	n/a
Jul	30.6 C (87.1 F)	6.7 C (44.1 F)	n/a	n/a
Aug	31.7 C (89.1 F)	5.0 C (41.0 F)	n/a	n/a
Sep	30.6 C (87.1 F)	2.8 C (37.0 F)	n/a	n/a
Oct	31.7 C (89.1 F)	0.0 C (32.0 F)	n/a	n/a
Nov	30.0 C (86.0 F)	-5.0 C (23.0 F)	n/a	n/a
Dec	30.0 C (86.0 F)	-5.0 C (23.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Puente San Isidro still stand. 1987 holds the most, with 62.

Standing records at Puente San Isidro by the year they were set
Year set	Standing records
1948	46
1949	37
1950	20
1951	52
1952	57
1953	17
1954	20
1955	35
1956	36
1957	25
1958	46
1959	32
1960	18
1961	20
1962	19
1963	13
1964	20
1965	26
1966	51
1967	31
1968	28
1969	44
1970	29
1971	33
1972	22
1973	28
1974	20
1975	22
1976	36
1977	26
1978	14
1979	20
1980	23
1981	24
1982	16
1983	44
1984	21
1985	33
1986	60
1987	62
1988	52
1989	36
1990	31
1991	51
1992	61
1993	7

All-Time Record Progression

3 new records

3 all-time records were set at Puente San Isidro between 2 May 1983 and 13 May 1985. Each dot is a new record.

When Puente San Isidro set new all-time records
Date	Kind	Detail
1983-05-02	Record high maximum temperature	Record high maximum temperature 33.3 C (91.9 F)
1985-05-12	Record high maximum temperature	Record high maximum temperature 33.9 C (93.0 F)
1985-05-13	Record high maximum temperature	Record high maximum temperature 35.0 C (95.0 F)

Wettest Day of Each Month

May: 70.9 mm (2.8 in)

The wettest day on record for each calendar month at Puente San Isidro. The most was 70.9 mm (2.8 in) on 11 May 1947.

Record daily precipitation for each month at Puente San Isidro
Month	Record daily precipitation (mm)	Date
Jan	47.8 mm (1.9 in)	24 January 1980
Feb	21.6 mm (0.9 in)	4 February 1967
Mar	21.3 mm (0.8 in)	29 March 1963
Apr	41.9 mm (1.6 in)	29 April 1961
May	70.9 mm (2.8 in)	11 May 1947
Jun	61.2 mm (2.4 in)	6 June 1985
Jul	69.3 mm (2.7 in)	27 July 1981
Aug	66.0 mm (2.6 in)	7 August 1965
Sep	52.8 mm (2.1 in)	28 September 1970
Oct	65.0 mm (2.6 in)	13 October 1986
Nov	42.2 mm (1.7 in)	4 November 1964
Dec	34.3 mm (1.4 in)	17 December 1947

Period of Record Coverage

1948 to 1993

46 years of record at Puente San Isidro, 1948 to 1993. 4 years have data for under 90 percent of days and are left out of rankings: 1948, 1979, 1982, 1993.

Days with data per year at Puente San Isidro
Year	Days with data	Share of year	Complete
1948	316	86%	No
1949	365	100%	Yes
1950	364	100%	Yes
1951	365	100%	Yes
1952	366	100%	Yes
1953	360	99%	Yes
1954	365	100%	Yes
1955	365	100%	Yes
1956	365	100%	Yes
1957	365	100%	Yes
1958	365	100%	Yes
1959	365	100%	Yes
1960	366	100%	Yes
1961	365	100%	Yes
1962	365	100%	Yes
1963	365	100%	Yes
1964	366	100%	Yes
1965	365	100%	Yes
1966	365	100%	Yes
1967	365	100%	Yes
1968	366	100%	Yes
1969	365	100%	Yes
1970	365	100%	Yes
1971	365	100%	Yes
1972	366	100%	Yes
1973	365	100%	Yes
1974	365	100%	Yes
1975	365	100%	Yes
1976	366	100%	Yes
1977	365	100%	Yes
1978	364	100%	Yes
1979	182	50%	No
1980	366	100%	Yes
1981	365	100%	Yes
1982	304	83%	No
1983	365	100%	Yes
1984	335	92%	Yes
1985	365	100%	Yes
1986	365	100%	Yes
1987	333	91%	Yes
1988	366	100%	Yes
1989	365	100%	Yes
1990	365	100%	Yes
1991	365	100%	Yes
1992	366	100%	Yes
1993	31	8%	No

Latest Records

Latest records at Puente San Isidro
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 January 1993	Puente San Isidro, MX	daily high max	28.3 C (82.9 F)	0.5 C (0.9 F)	2 years	5 of 100 (Routine)
19 January 1993	Puente San Isidro, MX	daily high max	27.2 C (81.0 F)	0.5 C (0.9 F)	40 years	17 of 100 (Routine)
17 January 1993	Puente San Isidro, MX	daily high max	28.3 C (82.9 F)	2.2 C (4.0 F)	41 years	23 of 100 (Routine)
16 January 1993	Puente San Isidro, MX	daily high max	26.7 C (80.1 F)	1.1 C (2.0 F)	41 years	19 of 100 (Routine)
13 January 1993	Puente San Isidro, MX	daily rain	6.4 mm (0.25 in)	5.9 mm (0.23 in)	3 years	10 of 100 (Routine)
13 January 1993	Puente San Isidro, MX	daily high max	26.1 C (79.0 F)	0.5 C (0.9 F)	5 years	6 of 100 (Routine)
12 January 1993	Puente San Isidro, MX	daily high max	28.9 C (84.0 F)	3.9 C (7.0 F)	41 years	29 of 100 (Routine)
11 January 1993	Puente San Isidro, MX	daily high max	28.3 C (82.9 F)	2.2 C (4.0 F)	13 years	14 of 100 (Routine)
31 December 1992	Puente San Isidro, MX	daily high max	27.8 C (82.0 F)	2.2 C (4.0 F)	7 years	15 of 100 (Routine)
30 December 1992	Puente San Isidro, MX	daily high max	26.7 C (80.1 F)	0.6 C (1.1 F)	2 years	6 of 100 (Routine)
29 December 1992	Puente San Isidro, MX	daily high max	26.7 C (80.1 F)	1.7 C (3.1 F)	22 years	17 of 100 (Routine)
28 December 1992	Puente San Isidro, MX	daily high max	26.7 C (80.1 F)	1.7 C (3.1 F)	15 years	15 of 100 (Routine)
27 December 1992	Puente San Isidro, MX	daily high max (Tie)	25.6 C (78.1 F)	tie	40 years	4 of 100 (Routine)
19 December 1992	Puente San Isidro, MX	daily high min	6.7 C (44.1 F)	1.1 C (2.0 F)	44 years	20 of 100 (Routine)
17 December 1992	Puente San Isidro, MX	daily high max (Tie)	26.7 C (80.1 F)	tie	2 years	1 of 100 (Routine)
14 December 1992	Puente San Isidro, MX	daily low max	15.0 C (59.0 F)	1.7 C (3.1 F)	34 years	21 of 100 (Routine)
12 December 1992	Puente San Isidro, MX	daily high max (Tie)	26.1 C (79.0 F)	tie	6 years	1 of 100 (Routine)
10 December 1992	Puente San Isidro, MX	daily high max	26.7 C (80.1 F)	0.6 C (1.1 F)	8 years	8 of 100 (Routine)
5 December 1992	Puente San Isidro, MX	daily high max	27.2 C (81.0 F)	1.1 C (2.0 F)	1 year	8 of 100 (Routine)
4 December 1992	Puente San Isidro, MX	daily high max	27.2 C (81.0 F)	1.6 C (2.9 F)	5 years	12 of 100 (Routine)

Climate Trend

40 complete years, 1949 to 1992

One stripe for each of 40 complete years at Puente San Isidro, 1949 to 1992. Blue stripes are years cooler than the station's own mean of 15.9 C (60.6 F); red stripes are warmer. The coolest year was 1968, at 15.2 C (59.3 F), and the warmest was 1991, at 17.1 C (62.8 F). The strongest colour marks a difference of 1.2 C (2.2 F).

Annual mean temperature at Puente San Isidro as warming stripes, 1949 to 1992
Year	Annual mean temperature	Difference from the station mean
1949	16.2 C	+0.28 C
1950	15.8 C	-0.09 C
1951	15.9 C	-0.06 C
1952	16.2 C	+0.31 C
1953	16.0 C	+0.10 C
1954	16.0 C	+0.06 C
1955	15.9 C	-0.02 C
1956	15.5 C	-0.40 C
1957	16.1 C	+0.18 C
1958	15.9 C	-0.05 C
1959	15.5 C	-0.39 C
1960	15.5 C	-0.41 C
1961	15.5 C	-0.40 C
1962	15.8 C	-0.15 C
1963	15.9 C	-0.03 C
1964	15.8 C	-0.11 C
1965	15.5 C	-0.45 C
1966	15.3 C	-0.60 C
1967	15.3 C	-0.63 C
1968	15.2 C	-0.72 C
1969	16.0 C	+0.09 C
1970	15.5 C	-0.39 C
1971	15.4 C	-0.48 C
1972	16.0 C	+0.10 C
1973	15.6 C	-0.28 C
1974	15.5 C	-0.46 C
1975	15.4 C	-0.56 C
1976	15.7 C	-0.25 C
1977	15.7 C	-0.24 C
1978	15.8 C	-0.15 C
1980	15.8 C	-0.12 C
1981	15.7 C	-0.24 C
1983	15.4 C	-0.54 C
1985	16.9 C	+0.99 C
1986	17.1 C	+1.16 C
1988	17.0 C	+1.05 C
1989	16.8 C	+0.85 C
1990	17.1 C	+1.20 C
1991	17.1 C	+1.20 C
1992	16.7 C	+0.75 C

The annual mean temperature here has risen by 0.2 C (0.1 to 0.3) per decade over 1949 to 1992. In Fahrenheit: 0.4 F (0.1 to 0.6) per decade. The slope is a straight line fitted to 40 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Puente San Isidro
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.2 C (0.1 to 0.3) per decade	0.4 F (0.1 to 0.6) per decade	1949 to 1992	40	Rise
Mean daily maximum	0.4 C (0.2 to 0.6) per decade	0.7 F (0.4 to 1.1) per decade	1949 to 1992	40	Rise
Mean daily minimum	0.0 C (-0.1 to 0.1) per decade	0.0 F (-0.2 to 0.2) per decade	1949 to 1992	40	Not clearly different from zero

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

1947 to 1993

Yearly extremes at Puente San Isidro: 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)	1985	31.7 C (89.1 F)	46
Coldest night (TNn)	-7.2 C (19.0 F)	1976	-3.3 C (26.1 F)	46
Wettest day (Rx1day)	70.9 mm (2.8 in)	1947	42.4 mm (1.7 in)	47
Wettest five days (Rx5day)	118.5 mm (4.7 in)	1965	83.8 mm (3.3 in)	47
Longest dry spell (CDD)	118 days	1955	64 days	47

Hottest day (TXx)

The hottest day of the year at Puente San Isidro, 1947 to 1993. The record is 35.0 C (95.0 F) in 1985, marked on the chart; the median year is 31.7 C (89.1 F).

Hottest day (TXx) at Puente San Isidro by year
Year	Hottest day (TXx)
1947	n/a
1948	32.8 C (91.0 F)
1949	31.7 C (89.1 F)
1950	31.7 C (89.1 F)
1951	31.7 C (89.1 F)
1952	31.7 C (89.1 F)
1953	32.8 C (91.0 F)
1954	31.1 C (88.0 F)
1955	31.7 C (89.1 F)
1956	30.0 C (86.0 F)
1957	31.1 C (88.0 F)
1958	31.1 C (88.0 F)
1959	28.9 C (84.0 F)
1960	30.0 C (86.0 F)
1961	31.7 C (89.1 F)
1962	30.6 C (87.1 F)
1963	31.7 C (89.1 F)
1964	32.2 C (90.0 F)
1965	30.6 C (87.1 F)
1966	30.6 C (87.1 F)
1967	31.7 C (89.1 F)
1968	30.0 C (86.0 F)
1969	31.7 C (89.1 F)
1970	31.7 C (89.1 F)
1971	31.1 C (88.0 F)
1972	31.1 C (88.0 F)
1973	31.7 C (89.1 F)
1974	30.6 C (87.1 F)
1975	31.1 C (88.0 F)
1976	31.1 C (88.0 F)
1977	30.6 C (87.1 F)
1978	32.2 C (90.0 F)
1979	30.6 C (87.1 F)
1980	30.0 C (86.0 F)
1981	30.6 C (87.1 F)
1982	31.7 C (89.1 F)
1983	33.3 C (91.9 F)
1984	33.3 C (91.9 F)
1985	35.0 C (95.0 F)
1986	33.9 C (93.0 F)
1987	31.7 C (89.1 F)
1988	35.0 C (95.0 F)
1989	33.9 C (93.0 F)
1990	32.2 C (90.0 F)
1991	35.0 C (95.0 F)
1992	32.8 C (91.0 F)
1993	28.9 C (84.0 F)

Coldest night (TNn)

The coldest night of the year at Puente San Isidro, 1947 to 1993. The record is -7.2 C (19.0 F) in 1976, marked on the chart; the median year is -3.3 C (26.1 F).

Coldest night (TNn) at Puente San Isidro by year
Year	Coldest night (TNn)
1947	n/a
1948	0.0 C (32.0 F)
1949	0.0 C (32.0 F)
1950	0.6 C (33.1 F)
1951	0.6 C (33.1 F)
1952	0.6 C (33.1 F)
1953	0.0 C (32.0 F)
1954	0.0 C (32.0 F)
1955	0.0 C (32.0 F)
1956	-6.1 C (21.0 F)
1957	-3.3 C (26.1 F)
1958	-2.2 C (28.0 F)
1959	-2.2 C (28.0 F)
1960	-5.0 C (23.0 F)
1961	-5.0 C (23.0 F)
1962	-4.4 C (24.1 F)
1963	-5.0 C (23.0 F)
1964	-2.2 C (28.0 F)
1965	-4.4 C (24.1 F)
1966	-3.3 C (26.1 F)
1967	-5.0 C (23.0 F)
1968	-2.2 C (28.0 F)
1969	-4.4 C (24.1 F)
1970	-6.1 C (21.0 F)
1971	-4.4 C (24.1 F)
1972	-5.0 C (23.0 F)
1973	-5.0 C (23.0 F)
1974	-4.4 C (24.1 F)
1975	-5.0 C (23.0 F)
1976	-7.2 C (19.0 F)
1977	-3.3 C (26.1 F)
1978	-3.3 C (26.1 F)
1979	-3.3 C (26.1 F)
1980	-4.4 C (24.1 F)
1981	-4.4 C (24.1 F)
1982	-3.3 C (26.1 F)
1983	-6.1 C (21.0 F)
1984	-1.1 C (30.0 F)
1985	0.0 C (32.0 F)
1986	-2.2 C (28.0 F)
1987	-4.4 C (24.1 F)
1988	-7.2 C (19.0 F)
1989	-3.3 C (26.1 F)
1990	-2.2 C (28.0 F)
1991	-2.2 C (28.0 F)
1992	-2.8 C (27.0 F)
1993	0.0 C (32.0 F)

Wettest day (Rx1day)

The wettest day of the year at Puente San Isidro, 1947 to 1993. The record is 70.9 mm (2.8 in) in 1947, marked on the chart; the median year is 42.4 mm (1.7 in).

Wettest day (Rx1day) at Puente San Isidro by year
Year	Wettest day (Rx1day)
1947	70.9 mm (2.8 in)
1948	45.0 mm (1.8 in)
1949	39.9 mm (1.6 in)
1950	32.8 mm (1.3 in)
1951	40.9 mm (1.6 in)
1952	42.4 mm (1.7 in)
1953	47.8 mm (1.9 in)
1954	40.4 mm (1.6 in)
1955	39.9 mm (1.6 in)
1956	40.4 mm (1.6 in)
1957	30.0 mm (1.2 in)
1958	46.5 mm (1.8 in)
1959	35.3 mm (1.4 in)
1960	33.3 mm (1.3 in)
1961	41.9 mm (1.6 in)
1962	50.3 mm (2.0 in)
1963	33.3 mm (1.3 in)
1964	46.7 mm (1.8 in)
1965	66.0 mm (2.6 in)
1966	50.8 mm (2.0 in)
1967	43.9 mm (1.7 in)
1968	37.6 mm (1.5 in)
1969	39.4 mm (1.6 in)
1970	52.8 mm (2.1 in)
1971	52.6 mm (2.1 in)
1972	40.1 mm (1.6 in)
1973	40.6 mm (1.6 in)
1974	41.9 mm (1.6 in)
1975	40.4 mm (1.6 in)
1976	61.5 mm (2.4 in)
1977	50.5 mm (2.0 in)
1978	60.5 mm (2.4 in)
1979	13.2 mm (0.5 in)
1980	47.8 mm (1.9 in)
1981	69.3 mm (2.7 in)
1982	39.9 mm (1.6 in)
1983	40.9 mm (1.6 in)
1984	48.8 mm (1.9 in)
1985	61.2 mm (2.4 in)
1986	65.0 mm (2.6 in)
1987	34.8 mm (1.4 in)
1988	57.9 mm (2.3 in)
1989	34.8 mm (1.4 in)
1990	53.3 mm (2.1 in)
1991	44.5 mm (1.8 in)
1992	50.3 mm (2.0 in)
1993	6.4 mm (0.25 in)

Wettest five days (Rx5day)

The wettest five days of the year at Puente San Isidro, 1947 to 1993. The record is 118.5 mm (4.7 in) in 1965, marked on the chart; the median year is 83.8 mm (3.3 in).

Wettest five days (Rx5day) at Puente San Isidro by year
Year	Wettest five days (Rx5day)
1947	82.6 mm (3.3 in)
1948	75.8 mm (3.0 in)
1949	105.2 mm (4.1 in)
1950	67.4 mm (2.7 in)
1951	63.1 mm (2.5 in)
1952	83.9 mm (3.3 in)
1953	98.3 mm (3.9 in)
1954	85.2 mm (3.4 in)
1955	89.9 mm (3.5 in)
1956	78.6 mm (3.1 in)
1957	54.3 mm (2.1 in)
1958	99.4 mm (3.9 in)
1959	79.2 mm (3.1 in)
1960	69.1 mm (2.7 in)
1961	50.9 mm (2.0 in)
1962	82.3 mm (3.2 in)
1963	78.0 mm (3.1 in)
1964	75.9 mm (3.0 in)
1965	118.5 mm (4.7 in)
1966	103.9 mm (4.1 in)
1967	83.8 mm (3.3 in)
1968	60.2 mm (2.4 in)
1969	98.1 mm (3.9 in)
1970	112.8 mm (4.4 in)
1971	106.1 mm (4.2 in)
1972	77.2 mm (3.0 in)
1973	83.1 mm (3.3 in)
1974	98.0 mm (3.9 in)
1975	65.9 mm (2.6 in)
1976	100.9 mm (4.0 in)
1977	90.0 mm (3.5 in)
1978	79.8 mm (3.1 in)
1979	19.0 mm (0.7 in)
1980	116.2 mm (4.6 in)
1981	97.8 mm (3.9 in)
1982	66.9 mm (2.6 in)
1983	74.4 mm (2.9 in)
1984	98.9 mm (3.9 in)
1985	105.7 mm (4.2 in)
1986	85.3 mm (3.4 in)
1987	85.6 mm (3.4 in)
1988	104.2 mm (4.1 in)
1989	81.1 mm (3.2 in)
1990	71.4 mm (2.8 in)
1991	115.9 mm (4.6 in)
1992	102.9 mm (4.1 in)
1993	6.4 mm (0.25 in)

Longest dry spell (CDD)

The longest dry spell of the year at Puente San Isidro, 1947 to 1993. The record is 118 days in 1955, marked on the chart; the median year is 64 days.

Longest dry spell (CDD) at Puente San Isidro by year
Year	Longest dry spell (CDD)
1947	56 days
1948	81 days
1949	72 days
1950	112 days
1951	117 days
1952	49 days
1953	69 days
1954	55 days
1955	118 days
1956	111 days
1957	101 days
1958	112 days
1959	65 days
1960	99 days
1961	49 days
1962	102 days
1963	87 days
1964	40 days
1965	39 days
1966	66 days
1967	42 days
1968	40 days
1969	65 days
1970	68 days
1971	64 days
1972	34 days
1973	48 days
1974	49 days
1975	98 days
1976	31 days
1977	30 days
1978	40 days
1979	68 days
1980	36 days
1981	58 days
1982	62 days
1983	71 days
1984	117 days
1985	50 days
1986	83 days
1987	100 days
1988	60 days
1989	92 days
1990	39 days
1991	51 days
1992	31 days
1993	12 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.

Frost Dates and Growing Season

32 years with a frost

Across 32 years with a frost, the median last spring frost at Puente San Isidro falls on 4 March and the median first autumn frost on 21 November, which leaves a median of 261 days between them.

Fitted over all years, the growing season changes by +3.8 days per decade at this station.

Frost dates and growing season at Puente San Isidro
Measure	Median, all years	Earliest period	Recent period (1957 to 1992)	Recent against earliest	Fitted trend
Last spring frost	4 March	n/a	4 March	n/a	-2.0 days per decade
First autumn frost	21 November	n/a	21 November	n/a	+1.8 days per decade
Growing days	261 days	n/a	261 days	n/a	+3.8 days per decade

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Rainfall Return Levels

44 years, 1947 to 1992

A day with at least 44.7 mm (1.8 in) of rain is expected about once in 2 years. A day with at least 80.5 mm (3.2 in) of rain is expected about once in 100 years.

Rainfall return levels at Puente San Isidro: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	44.7 mm (1.8 in)
5 years	54.1 mm (2.1 in)
10 years	60.4 mm (2.4 in)
25 years	68.4 mm (2.7 in)
50 years	74.5 mm (2.9 in)	Longer than the 44 years of record
100 years	80.5 mm (3.2 in)	Longer than the 44 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, 44 years of values from 1947 to 1992.

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: 70.9 mm (2.8 in) in 1947; 69.3 mm (2.7 in) in 1981; 66.0 mm (2.6 in) in 1965.

Station Changes

No change in the annual mean temperature of this station was found against its neighbours.

Download the Data

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