Presa Alvaro Obregon Weather Records (MXN00024173)

Record envelope, standing records and threshold days for Presa Alvaro Obregon (MXN00024173), Mexico, with 75 years of record.

Key Facts for Presa Alvaro Obregon

Presa Alvaro Obregon (MXN00024173) is a weather station in Mexico at 22.17 latitude and -99.65 longitude, 1,170 m (3,838 ft) above sea level.
The station reports from 1936 to 2010, 75 years of record.
1,464 records set at Presa Alvaro Obregon still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Presa Alvaro Obregon set a daily record high maximum temperature of 31.7 C (89.1 F) on 29 November 2010.

About the Station

Location: Mexico, 22.17 latitude, -99.65 longitude.
Elevation: 1,170 m (3,838 ft).
Period of record: 1936 to 2010, 75 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 Presa Alvaro Obregon. 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 Presa Alvaro Obregon, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	35.6 C (96.1 F)	-7.2 C (19.0 F)	n/a	n/a
Feb	38.9 C (102.0 F)	-5.6 C (21.9 F)	n/a	n/a
Mar	40.0 C (104.0 F)	-3.9 C (25.0 F)	n/a	n/a
Apr	42.2 C (108.0 F)	0.0 C (32.0 F)	n/a	n/a
May	43.3 C (109.9 F)	7.2 C (45.0 F)	n/a	n/a
Jun	40.0 C (104.0 F)	7.8 C (46.0 F)	n/a	n/a
Jul	36.7 C (98.1 F)	7.8 C (46.0 F)	n/a	n/a
Aug	37.8 C (100.0 F)	8.9 C (48.0 F)	n/a	n/a
Sep	35.6 C (96.1 F)	5.6 C (42.1 F)	n/a	n/a
Oct	37.8 C (100.0 F)	2.8 C (37.0 F)	n/a	n/a
Nov	36.7 C (98.1 F)	-5.0 C (23.0 F)	n/a	n/a
Dec	36.7 C (98.1 F)	-5.0 C (23.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Presa Alvaro Obregon still stand. 1937 holds the most, with 105.

Standing records at Presa Alvaro Obregon by the year they were set
Year set	Standing records
1936	5
1937	105
1938	48
1939	22
1940	9
1941	42
1942	57
1943	47
1944	37
1945	25
1946	36
1947	32
1948	83
1949	45
1950	14
1951	25
1952	26
1953	26
1954	20
1955	29
1981	21
1982	21
1983	23
1984	22
1985	16
1986	16
1987	34
1988	28
1989	41
1990	21
1991	37
1992	33
1993	30
1994	100
1995	21
1996	23
1997	25
1998	28
2000	10
2001	18
2002	20
2003	18
2004	10
2005	8
2006	14
2007	25
2008	18
2009	27
2010	23

All-Time Record Progression

4 new records

4 all-time records were set at Presa Alvaro Obregon between 14 December 1997 and 8 May 1998. Each dot is a new record.

When Presa Alvaro Obregon set new all-time records
Date	Kind	Detail
1997-12-14	Record low maximum temperature	Record low maximum temperature 3.9 C (39.0 F)
1997-12-15	Record low maximum temperature	Record low maximum temperature 2.8 C (37.0 F)
1998-05-07	Record high maximum temperature	Record high maximum temperature 42.8 C (109.0 F)
1998-05-08	Record high maximum temperature	Record high maximum temperature 43.3 C (109.9 F)

Wettest Day of Each Month

Sep: 224.8 mm (8.9 in)

The wettest day on record for each calendar month at Presa Alvaro Obregon. The most was 224.8 mm (8.9 in) on 19 September 1955.

Record daily precipitation for each month at Presa Alvaro Obregon
Month	Record daily precipitation (mm)	Date
Jan	20.3 mm (0.8 in)	2 January 1995
Feb	26.9 mm (1.1 in)	4 February 2007
Mar	124.0 mm (4.9 in)	1 March 1938
Apr	110.0 mm (4.3 in)	21 April 1939
May	63.0 mm (2.5 in)	8 May 2000
Jun	45.0 mm (1.8 in)	16 June 1939
Jul	181.9 mm (7.2 in)	4 July 1988
Aug	130.8 mm (5.1 in)	23 August 1996
Sep	224.8 mm (8.9 in)	19 September 1955
Oct	47.8 mm (1.9 in)	4 October 1990
Nov	37.8 mm (1.5 in)	1 November 1953
Dec	35.8 mm (1.4 in)	18 December 2009

Period of Record Coverage

1936 to 2010

49 years of record at Presa Alvaro Obregon, 1936 to 2010. 12 years have data for under 90 percent of days and are left out of rankings: 1936, 1937, 1938, 1939, 1940, 1941, 1989, 1996 and others.

Days with data per year at Presa Alvaro Obregon
Year	Days with data	Share of year	Complete
1936	31	8%	No
1937	312	85%	No
1938	299	82%	No
1939	303	83%	No
1940	59	16%	No
1941	325	89%	No
1942	358	98%	Yes
1943	334	92%	Yes
1944	364	99%	Yes
1945	363	99%	Yes
1946	364	100%	Yes
1947	359	98%	Yes
1948	361	99%	Yes
1949	364	100%	Yes
1950	365	100%	Yes
1951	364	100%	Yes
1952	366	100%	Yes
1953	362	99%	Yes
1954	364	100%	Yes
1955	364	100%	Yes
1981	364	100%	Yes
1982	365	100%	Yes
1983	363	99%	Yes
1984	358	98%	Yes
1985	363	99%	Yes
1986	334	92%	Yes
1987	364	100%	Yes
1988	364	99%	Yes
1989	326	89%	No
1990	358	98%	Yes
1991	355	97%	Yes
1992	357	98%	Yes
1993	362	99%	Yes
1994	331	91%	Yes
1995	359	98%	Yes
1996	269	73%	No
1997	358	98%	Yes
1998	143	39%	No
2000	150	41%	No
2001	340	93%	Yes
2002	357	98%	Yes
2003	313	86%	No
2004	306	84%	No
2005	355	97%	Yes
2006	365	100%	Yes
2007	363	99%	Yes
2008	335	92%	Yes
2009	365	100%	Yes
2010	334	92%	Yes

Latest Records

Latest records at Presa Alvaro Obregon
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
29 November 2010	Presa Alvaro Obregon, MX	daily high max	31.7 C (89.1 F)	1.1 C (2.0 F)	72 years	30 of 100 (Routine)
28 November 2010	Presa Alvaro Obregon, MX	daily high max (Tie)	30.0 C (86.0 F)	tie	60 years	6 of 100 (Routine)
25 November 2010	Presa Alvaro Obregon, MX	daily high max (Tie)	30.0 C (86.0 F)	tie	68 years	6 of 100 (Routine)
8 November 2010	Presa Alvaro Obregon, MX	daily low min	0.6 C (33.1 F)	4.4 C (7.9 F)	64 years	38 of 100 (Notable)
7 November 2010	Presa Alvaro Obregon, MX	daily low min	1.7 C (35.1 F)	3.3 C (5.9 F)	25 years	23 of 100 (Routine)
6 November 2010	Presa Alvaro Obregon, MX	daily low min	0.0 C (32.0 F)	0.6 C (1.1 F)	72 years	29 of 100 (Routine)
29 October 2010	Presa Alvaro Obregon, MX	daily high max (Tie)	32.8 C (91.0 F)	tie	72 years	7 of 100 (Routine)
27 October 2010	Presa Alvaro Obregon, MX	daily high max	33.9 C (93.0 F)	1.1 C (2.0 F)	15 years	13 of 100 (Routine)
25 October 2010	Presa Alvaro Obregon, MX	daily high max	32.8 C (91.0 F)	0.6 C (1.1 F)	12 years	11 of 100 (Routine)
20 September 2010	Presa Alvaro Obregon, MX	daily high min (Tie)	18.9 C (66.0 F)	tie	8 years	2 of 100 (Routine)
17 September 2010	Presa Alvaro Obregon, MX	daily rain	31.0 mm (1.2 in)	11.2 mm (0.4 in)	60 years	32 of 100 (Routine)
11 August 2010	Presa Alvaro Obregon, MX	daily rain	10.9 mm (0.4 in)	1.0 mm (0.04 in)	71 years	20 of 100 (Routine)
29 July 2010	Presa Alvaro Obregon, MX	daily low max (Tie)	23.9 C (75.0 F)	tie	23 years	3 of 100 (Routine)
28 July 2010	Presa Alvaro Obregon, MX	daily rain	43.9 mm (1.7 in)	32.0 mm (1.3 in)	16 years	34 of 100 (Routine)
25 July 2010	Presa Alvaro Obregon, MX	daily low max	21.7 C (71.1 F)	0.5 C (0.9 F)	64 years	27 of 100 (Routine)
23 July 2010	Presa Alvaro Obregon, MX	daily rain	19.8 mm (0.8 in)	8.9 mm (0.35 in)	24 years	20 of 100 (Routine)
22 July 2010	Presa Alvaro Obregon, MX	daily low max	21.7 C (71.1 F)	0.5 C (0.9 F)	57 years	25 of 100 (Routine)
22 July 2010	Presa Alvaro Obregon, MX	daily high min (Tie)	18.9 C (66.0 F)	tie	65 years	6 of 100 (Routine)
21 July 2010	Presa Alvaro Obregon, MX	daily high max	33.9 C (93.0 F)	1.1 C (2.0 F)	72 years	31 of 100 (Routine)
20 July 2010	Presa Alvaro Obregon, MX	daily high max	35.0 C (95.0 F)	1.1 C (2.0 F)	20 years	16 of 100 (Routine)

Climate Trend

31 complete years, 1942 to 2009

One stripe for each of 31 complete years at Presa Alvaro Obregon, 1942 to 2009. Blue stripes are years cooler than the station's own mean of 19.9 C (67.8 F); red stripes are warmer. The coolest year was 1944, at 18.8 C (65.8 F), and the warmest was 2009, at 21.2 C (70.2 F). The strongest colour marks a difference of 1.4 C (2.5 F).

Annual mean temperature at Presa Alvaro Obregon as warming stripes, 1942 to 2009
Year	Annual mean temperature	Difference from the station mean
1942	19.4 C	-0.47 C
1944	18.8 C	-1.11 C
1945	19.7 C	-0.25 C
1946	19.2 C	-0.67 C
1947	19.2 C	-0.68 C
1948	19.3 C	-0.61 C
1949	20.2 C	+0.25 C
1950	19.5 C	-0.42 C
1951	19.3 C	-0.57 C
1952	19.1 C	-0.82 C
1953	19.1 C	-0.78 C
1954	18.9 C	-0.97 C
1955	18.9 C	-1.03 C
1981	20.0 C	+0.12 C
1982	20.7 C	+0.78 C
1983	20.3 C	+0.36 C
1984	19.9 C	-0.05 C
1985	20.3 C	+0.42 C
1987	19.9 C	-0.02 C
1988	19.9 C	+0.03 C
1990	20.2 C	+0.28 C
1991	20.7 C	+0.83 C
1992	19.6 C	-0.29 C
1995	21.1 C	+1.24 C
1997	20.3 C	+0.44 C
2001	19.9 C	-0.03 C
2002	20.5 C	+0.57 C
2005	20.5 C	+0.55 C
2006	20.8 C	+0.89 C
2007	20.5 C	+0.64 C
2009	21.2 C	+1.34 C

The annual mean temperature here has risen by 0.2 C (0.2 to 0.3) per decade over 1942 to 2009. In Fahrenheit: 0.4 F (0.3 to 0.5) per decade. The slope is a straight line fitted to 31 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Presa Alvaro Obregon
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.2 C (0.2 to 0.3) per decade	0.4 F (0.3 to 0.5) per decade	1942 to 2009	31	Rise
Mean daily maximum	0.5 C (0.4 to 0.6) per decade	0.9 F (0.7 to 1.1) per decade	1942 to 2009	31	Rise
Mean daily minimum	-0.02 C (-0.14 to 0.09) per decade	-0.04 F (-0.25 to 0.17) per decade	1942 to 2009	31	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

1936 to 2010

Yearly extremes at Presa Alvaro Obregon: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	43.3 C (109.9 F)	1998	38.9 C (102.0 F)	49
Coldest night (TNn)	-7.2 C (19.0 F)	1938	0.0 C (32.0 F)	49
Wettest day (Rx1day)	224.8 mm (8.9 in)	1955	41.6 mm (1.6 in)	50
Wettest five days (Rx5day)	295.2 mm (11.6 in)	1955	75.8 mm (3.0 in)	50
Longest dry spell (CDD)	117 days	2003	56 days	50

Hottest day (TXx)

The hottest day of the year at Presa Alvaro Obregon, 1936 to 2010. The record is 43.3 C (109.9 F) in 1998, marked on the chart; the median year is 38.9 C (102.0 F).

Hottest day (TXx) at Presa Alvaro Obregon by year
Year	Hottest day (TXx)
1936	31.7 C (89.1 F)
1937	37.8 C (100.0 F)
1938	37.8 C (100.0 F)
1939	36.7 C (98.1 F)
1940	33.9 C (93.0 F)
1941	33.9 C (93.0 F)
1942	35.0 C (95.0 F)
1943	36.1 C (97.0 F)
1944	35.6 C (96.1 F)
1945	36.1 C (97.0 F)
1946	37.2 C (99.0 F)
1947	35.6 C (96.1 F)
1948	37.8 C (100.0 F)
1949	35.6 C (96.1 F)
1950	36.7 C (98.1 F)
1951	35.0 C (95.0 F)
1952	36.7 C (98.1 F)
1953	37.2 C (99.0 F)
1954	36.7 C (98.1 F)
1955	39.4 C (102.9 F)
1981	39.4 C (102.9 F)
1982	40.6 C (105.1 F)
1983	42.2 C (108.0 F)
1984	40.6 C (105.1 F)
1985	38.9 C (102.0 F)
1986	40.0 C (104.0 F)
1987	37.8 C (100.0 F)
1988	38.9 C (102.0 F)
1989	40.0 C (104.0 F)
1990	42.2 C (108.0 F)
1991	41.1 C (106.0 F)
1992	36.7 C (98.1 F)
1993	38.9 C (102.0 F)
1994	37.8 C (100.0 F)
1995	40.6 C (105.1 F)
1996	40.0 C (104.0 F)
1997	38.9 C (102.0 F)
1998	43.3 C (109.9 F)
1999	n/a
2000	32.8 C (91.0 F)
2001	38.3 C (100.9 F)
2002	40.6 C (105.1 F)
2003	41.7 C (107.1 F)
2004	40.0 C (104.0 F)
2005	38.9 C (102.0 F)
2006	40.6 C (105.1 F)
2007	38.9 C (102.0 F)
2008	40.0 C (104.0 F)
2009	40.6 C (105.1 F)
2010	38.9 C (102.0 F)

Coldest night (TNn)

The coldest night of the year at Presa Alvaro Obregon, 1936 to 2010. The record is -7.2 C (19.0 F) in 1938, marked on the chart; the median year is 0.0 C (32.0 F).

Coldest night (TNn) at Presa Alvaro Obregon by year
Year	Coldest night (TNn)
1936	0.6 C (33.1 F)
1937	-5.0 C (23.0 F)
1938	-7.2 C (19.0 F)
1939	2.8 C (37.0 F)
1940	3.9 C (39.0 F)
1941	1.7 C (35.1 F)
1942	-5.0 C (23.0 F)
1943	-0.6 C (30.9 F)
1944	-0.6 C (30.9 F)
1945	0.0 C (32.0 F)
1946	1.7 C (35.1 F)
1947	1.7 C (35.1 F)
1948	2.8 C (37.0 F)
1949	2.8 C (37.0 F)
1950	1.7 C (35.1 F)
1951	-5.6 C (21.9 F)
1952	0.0 C (32.0 F)
1953	-1.7 C (28.9 F)
1954	0.6 C (33.1 F)
1955	-3.3 C (26.1 F)
1981	-1.1 C (30.0 F)
1982	0.0 C (32.0 F)
1983	0.0 C (32.0 F)
1984	0.0 C (32.0 F)
1985	-2.2 C (28.0 F)
1986	-3.3 C (26.1 F)
1987	-1.1 C (30.0 F)
1988	-1.1 C (30.0 F)
1989	-3.9 C (25.0 F)
1990	0.0 C (32.0 F)
1991	1.1 C (34.0 F)
1992	-3.3 C (26.1 F)
1993	-2.2 C (28.0 F)
1994	0.6 C (33.1 F)
1995	0.6 C (33.1 F)
1996	0.0 C (32.0 F)
1997	-0.6 C (30.9 F)
1998	0.6 C (33.1 F)
1999	n/a
2000	0.6 C (33.1 F)
2001	0.6 C (33.1 F)
2002	0.0 C (32.0 F)
2003	0.0 C (32.0 F)
2004	0.6 C (33.1 F)
2005	1.7 C (35.1 F)
2006	0.6 C (33.1 F)
2007	2.8 C (37.0 F)
2008	1.7 C (35.1 F)
2009	1.7 C (35.1 F)
2010	0.0 C (32.0 F)

Wettest day (Rx1day)

The wettest day of the year at Presa Alvaro Obregon, 1936 to 2010. The record is 224.8 mm (8.9 in) in 1955, marked on the chart; the median year is 41.6 mm (1.6 in).

Wettest day (Rx1day) at Presa Alvaro Obregon by year
Year	Wettest day (Rx1day)
1936	0.0 mm (0.00 in)
1937	97.8 mm (3.9 in)
1938	124.0 mm (4.9 in)
1939	110.0 mm (4.3 in)
1940	26.9 mm (1.1 in)
1941	30.0 mm (1.2 in)
1942	31.0 mm (1.2 in)
1943	35.1 mm (1.4 in)
1944	29.0 mm (1.1 in)
1945	41.1 mm (1.6 in)
1946	67.8 mm (2.7 in)
1947	41.4 mm (1.6 in)
1948	19.1 mm (0.8 in)
1949	42.2 mm (1.7 in)
1950	64.5 mm (2.5 in)
1951	61.5 mm (2.4 in)
1952	41.7 mm (1.6 in)
1953	82.8 mm (3.3 in)
1954	36.8 mm (1.4 in)
1955	224.8 mm (8.9 in)
1981	57.7 mm (2.3 in)
1982	41.4 mm (1.6 in)
1983	45.5 mm (1.8 in)
1984	32.8 mm (1.3 in)
1985	24.9 mm (1.0 in)
1986	43.9 mm (1.7 in)
1987	29.0 mm (1.1 in)
1988	181.9 mm (7.2 in)
1989	38.9 mm (1.5 in)
1990	102.9 mm (4.1 in)
1991	50.8 mm (2.0 in)
1992	32.8 mm (1.3 in)
1993	31.0 mm (1.2 in)
1994	27.4 mm (1.1 in)
1995	31.5 mm (1.2 in)
1996	130.8 mm (5.1 in)
1997	24.9 mm (1.0 in)
1998	34.3 mm (1.4 in)
1999	15.0 mm (0.6 in)
2000	63.0 mm (2.5 in)
2001	31.5 mm (1.2 in)
2002	35.8 mm (1.4 in)
2003	61.0 mm (2.4 in)
2004	47.8 mm (1.9 in)
2005	68.3 mm (2.7 in)
2006	25.9 mm (1.0 in)
2007	109.5 mm (4.3 in)
2008	140.0 mm (5.5 in)
2009	42.9 mm (1.7 in)
2010	43.9 mm (1.7 in)

Wettest five days (Rx5day)

The wettest five days of the year at Presa Alvaro Obregon, 1936 to 2010. The record is 295.2 mm (11.6 in) in 1955, marked on the chart; the median year is 75.8 mm (3.0 in).

Wettest five days (Rx5day) at Presa Alvaro Obregon by year
Year	Wettest five days (Rx5day)
1936	0.0 mm (0.00 in)
1937	162.2 mm (6.4 in)
1938	124.0 mm (4.9 in)
1939	110.0 mm (4.3 in)
1940	28.2 mm (1.1 in)
1941	65.0 mm (2.6 in)
1942	73.2 mm (2.9 in)
1943	60.8 mm (2.4 in)
1944	63.1 mm (2.5 in)
1945	86.7 mm (3.4 in)
1946	75.7 mm (3.0 in)
1947	80.6 mm (3.2 in)
1948	46.1 mm (1.8 in)
1949	94.0 mm (3.7 in)
1950	84.3 mm (3.3 in)
1951	85.4 mm (3.4 in)
1952	87.1 mm (3.4 in)
1953	98.1 mm (3.9 in)
1954	75.9 mm (3.0 in)
1955	295.2 mm (11.6 in)
1981	93.0 mm (3.7 in)
1982	75.0 mm (3.0 in)
1983	103.2 mm (4.1 in)
1984	51.9 mm (2.0 in)
1985	60.4 mm (2.4 in)
1986	56.6 mm (2.2 in)
1987	35.4 mm (1.4 in)
1988	204.3 mm (8.0 in)
1989	71.9 mm (2.8 in)
1990	135.3 mm (5.3 in)
1991	77.8 mm (3.1 in)
1992	79.3 mm (3.1 in)
1993	92.8 mm (3.7 in)
1994	36.2 mm (1.4 in)
1995	60.3 mm (2.4 in)
1996	171.7 mm (6.8 in)
1997	69.0 mm (2.7 in)
1998	52.6 mm (2.1 in)
1999	18.8 mm (0.7 in)
2000	70.9 mm (2.8 in)
2001	36.0 mm (1.4 in)
2002	55.9 mm (2.2 in)
2003	95.5 mm (3.8 in)
2004	68.4 mm (2.7 in)
2005	119.7 mm (4.7 in)
2006	50.0 mm (2.0 in)
2007	130.1 mm (5.1 in)
2008	226.4 mm (8.9 in)
2009	56.9 mm (2.2 in)
2010	89.5 mm (3.5 in)

Longest dry spell (CDD)

The longest dry spell of the year at Presa Alvaro Obregon, 1936 to 2010. The record is 117 days in 2003, marked on the chart; the median year is 56 days.

Longest dry spell (CDD) at Presa Alvaro Obregon by year
Year	Longest dry spell (CDD)
1936	31 days
1937	50 days
1938	55 days
1939	51 days
1940	37 days
1941	31 days
1942	29 days
1943	84 days
1944	61 days
1945	60 days
1946	23 days
1947	88 days
1948	46 days
1949	69 days
1950	79 days
1951	76 days
1952	53 days
1953	55 days
1954	62 days
1955	65 days
1981	33 days
1982	43 days
1983	90 days
1984	91 days
1985	97 days
1986	111 days
1987	51 days
1988	81 days
1989	49 days
1990	111 days
1991	40 days
1992	46 days
1993	49 days
1994	82 days
1995	107 days
1996	84 days
1997	51 days
1998	71 days
1999	69 days
2000	49 days
2001	56 days
2002	38 days
2003	117 days
2004	61 days
2005	55 days
2006	57 days
2007	48 days
2008	61 days
2009	45 days
2010	48 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

42 years, 1942 to 2010

A day with at least 41.5 mm (1.6 in) of rain is expected about once in 2 years. A day with at least 253.4 mm (10.0 in) of rain is expected about once in 100 years.

Rainfall return levels at Presa Alvaro Obregon: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	41.5 mm (1.6 in)
5 years	65.9 mm (2.6 in)
10 years	90.5 mm (3.6 in)
25 years	136.4 mm (5.4 in)
50 years	185.9 mm (7.3 in)	Longer than the 42 years of record
100 years	253.4 mm (10.0 in)	Longer than the 42 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, 42 years of values from 1942 to 2010.

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: 224.8 mm (8.9 in) in 1955; 181.9 mm (7.2 in) in 1988; 140.0 mm (5.5 in) in 2008.

Download the Data

Data for Presa Alvaro Obregon standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Presa Alvaro Obregon 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).