Acambaro Weather Records (MXN00011002)

Record envelope, standing records and threshold days for Acambaro (MXN00011002), Mexico, with 77 years of record.

Key Facts for Acambaro

Acambaro (MXN00011002) is a weather station in Mexico at 20.02 latitude and -100.70 longitude, 1,850 m (6,069 ft) above sea level.
The station reports from 1937 to 2013, 77 years of record.
1,464 records set at Acambaro still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Acambaro tied a daily record high maximum temperature of 35.0 C (95.0 F) on 19 April 2013.

About the Station

Location: Mexico, 20.02 latitude, -100.70 longitude.
Elevation: 1,850 m (6,069 ft).
Period of record: 1937 to 2013, 77 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 Acambaro. 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 Acambaro, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	31.7 C (89.1 F)	-5.0 C (23.0 F)	n/a	n/a
Feb	32.8 C (91.0 F)	-2.8 C (27.0 F)	n/a	n/a
Mar	36.7 C (98.1 F)	0.6 C (33.1 F)	n/a	n/a
Apr	38.3 C (100.9 F)	3.9 C (39.0 F)	n/a	n/a
May	40.0 C (104.0 F)	6.7 C (44.1 F)	n/a	n/a
Jun	39.4 C (102.9 F)	6.7 C (44.1 F)	n/a	n/a
Jul	33.9 C (93.0 F)	7.2 C (45.0 F)	n/a	n/a
Aug	32.2 C (90.0 F)	8.9 C (48.0 F)	n/a	n/a
Sep	32.2 C (90.0 F)	3.3 C (37.9 F)	n/a	n/a
Oct	32.2 C (90.0 F)	0.0 C (32.0 F)	n/a	n/a
Nov	31.1 C (88.0 F)	-2.2 C (28.0 F)	n/a	n/a
Dec	31.7 C (89.1 F)	-6.1 C (21.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Acambaro still stand. 1998 holds the most, with 63.

Standing records at Acambaro by the year they were set
Year set	Standing records
1937	21
1938	21
1939	11
1941	7
1942	28
1943	37
1944	33
1945	13
1946	19
1947	19
1948	21
1949	19
1950	8
1951	29
1952	28
1953	14
1954	17
1955	19
1956	45
1957	25
1958	28
1959	29
1960	10
1961	17
1962	7
1963	18
1964	18
1965	21
1966	31
1967	17
1968	17
1969	19
1970	11
1971	10
1972	11
1973	14
1974	15
1975	14
1976	27
1977	28
1978	14
1979	30
1980	22
1981	16
1982	23
1983	16
1984	7
1985	7
1986	20
1987	41
1988	12
1989	12
1990	15
1991	19
1992	24
1993	28
1994	20
1995	15
1996	24
1997	27
1998	63
1999	7
2000	8
2001	12
2002	11
2003	20
2004	10
2005	15
2006	17
2007	11
2008	16
2009	27
2010	12
2011	31
2012	9
2013	7

All-Time Record Progression

3 new records

3 all-time records were set at Acambaro between 1 September 1975 and 16 August 1991. Each dot is a new record.

When Acambaro set new all-time records
Date	Kind	Detail
1975-09-01	Record daily precipitation	Record daily precipitation 73.4 mm (2.9 in)
1983-05-05	Record high maximum temperature	Record high maximum temperature 40.0 C (104.0 F)
1991-08-16	Record daily precipitation	Record daily precipitation 97.5 mm (3.8 in)

Wettest Day of Each Month

Aug: 97.5 mm (3.8 in)

The wettest day on record for each calendar month at Acambaro. The most was 97.5 mm (3.8 in) on 16 August 1991.

Record daily precipitation for each month at Acambaro
Month	Record daily precipitation (mm)	Date
Jan	42.4 mm (1.7 in)	25 January 1980
Feb	22.4 mm (0.9 in)	10 February 1979
Mar	35.6 mm (1.4 in)	20 March 1997
Apr	24.9 mm (1.0 in)	30 April 1986
May	70.9 mm (2.8 in)	7 May 1992
Jun	64.8 mm (2.6 in)	12 June 1942
Jul	57.4 mm (2.3 in)	21 July 1985
Aug	97.5 mm (3.8 in)	16 August 1991
Sep	95.3 mm (3.8 in)	4 September 2009
Oct	56.9 mm (2.2 in)	16 October 1955
Nov	39.9 mm (1.6 in)	15 November 1941
Dec	26.9 mm (1.1 in)	17 December 1947

Period of Record Coverage

1937 to 2013

76 years of record at Acambaro, 1937 to 2013. 6 years have data for under 90 percent of days and are left out of rankings: 1939, 1941, 1945, 1946, 2007, 2013.

Days with data per year at Acambaro
Year	Days with data	Share of year	Complete
1937	365	100%	Yes
1938	365	100%	Yes
1939	180	49%	No
1941	91	25%	No
1942	365	100%	Yes
1943	361	99%	Yes
1944	330	90%	Yes
1945	120	33%	No
1946	321	88%	No
1947	364	100%	Yes
1948	335	92%	Yes
1949	336	92%	Yes
1950	365	100%	Yes
1951	365	100%	Yes
1952	365	100%	Yes
1953	362	99%	Yes
1954	365	100%	Yes
1955	365	100%	Yes
1956	365	100%	Yes
1957	365	100%	Yes
1958	363	99%	Yes
1959	365	100%	Yes
1960	365	100%	Yes
1961	365	100%	Yes
1962	365	100%	Yes
1963	364	100%	Yes
1964	364	99%	Yes
1965	365	100%	Yes
1966	365	100%	Yes
1967	365	100%	Yes
1968	364	99%	Yes
1969	365	100%	Yes
1970	365	100%	Yes
1971	365	100%	Yes
1972	365	100%	Yes
1973	335	92%	Yes
1974	365	100%	Yes
1975	365	100%	Yes
1976	363	99%	Yes
1977	365	100%	Yes
1978	362	99%	Yes
1979	365	100%	Yes
1980	365	100%	Yes
1981	364	100%	Yes
1982	365	100%	Yes
1983	365	100%	Yes
1984	365	100%	Yes
1985	365	100%	Yes
1986	335	92%	Yes
1987	365	100%	Yes
1988	365	100%	Yes
1989	365	100%	Yes
1990	346	95%	Yes
1991	362	99%	Yes
1992	365	100%	Yes
1993	364	100%	Yes
1994	364	100%	Yes
1995	361	99%	Yes
1996	365	100%	Yes
1997	364	100%	Yes
1998	365	100%	Yes
1999	365	100%	Yes
2000	366	100%	Yes
2001	364	100%	Yes
2002	351	96%	Yes
2003	365	100%	Yes
2004	366	100%	Yes
2005	365	100%	Yes
2006	365	100%	Yes
2007	304	83%	No
2008	366	100%	Yes
2009	365	100%	Yes
2010	365	100%	Yes
2011	365	100%	Yes
2012	364	99%	Yes
2013	120	33%	No

Latest Records

Latest records at Acambaro
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
19 April 2013	Acambaro, MX	daily high max (Tie)	35.0 C (95.0 F)	tie	18 years	3 of 100 (Routine)
17 April 2013	Acambaro, MX	daily high max	36.7 C (98.1 F)	1.1 C (2.0 F)	20 years	17 of 100 (Routine)
7 April 2013	Acambaro, MX	daily high min (Tie)	13.9 C (57.0 F)	tie	38 years	4 of 100 (Routine)
3 April 2013	Acambaro, MX	daily high min (Tie)	13.9 C (57.0 F)	tie	6 years	2 of 100 (Routine)
1 April 2013	Acambaro, MX	daily high max (Tie)	33.9 C (93.0 F)	tie	4 years	2 of 100 (Routine)
15 March 2013	Acambaro, MX	daily low max	15.0 C (59.0 F)	5.6 C (10.1 F)	68 years	49 of 100 (Notable)
14 March 2013	Acambaro, MX	daily low max	20.0 C (68.0 F)	1.7 C (3.1 F)	30 years	22 of 100 (Routine)
5 March 2013	Acambaro, MX	monthly low min (Tie)	0.6 C (33.1 F)	tie	74 years	9 of 100 (Routine)
4 March 2013	Acambaro, MX	monthly low min (Tie)	0.6 C (33.1 F)	tie	74 years	9 of 100 (Routine)
28 February 2013	Acambaro, MX	daily high max (Tie)	31.7 C (89.1 F)	tie	4 years	2 of 100 (Routine)
13 February 2013	Acambaro, MX	daily high max (Tie)	30.0 C (86.0 F)	tie	54 years	5 of 100 (Routine)
12 February 2013	Acambaro, MX	daily high max (Tie)	30.0 C (86.0 F)	tie	10 years	2 of 100 (Routine)
11 February 2013	Acambaro, MX	daily high max (Tie)	30.0 C (86.0 F)	tie	54 years	5 of 100 (Routine)
8 February 2013	Acambaro, MX	daily high max (Tie)	30.0 C (86.0 F)	tie	19 years	3 of 100 (Routine)
1 February 2013	Acambaro, MX	daily high max	30.6 C (87.1 F)	0.6 C (1.1 F)	76 years	31 of 100 (Routine)
5 January 2013	Acambaro, MX	daily high min	10.0 C (50.0 F)	1.1 C (2.0 F)	30 years	20 of 100 (Routine)
2 January 2013	Acambaro, MX	daily high min (Tie)	11.7 C (53.1 F)	tie	20 years	3 of 100 (Routine)
3 December 2012	Acambaro, MX	daily high max (Tie)	27.8 C (82.0 F)	tie	18 years	3 of 100 (Routine)
16 November 2012	Acambaro, MX	daily high max (Tie)	28.9 C (84.0 F)	tie	54 years	5 of 100 (Routine)
5 November 2012	Acambaro, MX	daily low max (Tie)	17.8 C (64.0 F)	tie	36 years	4 of 100 (Routine)

Climate Trend

60 complete years, 1937 to 2012

One stripe for each of 60 complete years at Acambaro, 1937 to 2012. Blue stripes are years cooler than the station's own mean of 18.3 C (65.0 F); red stripes are warmer. The coolest year was 1956, at 16.8 C (62.2 F), and the warmest was 2009, at 19.7 C (67.4 F). The strongest colour marks a difference of 1.6 C (2.9 F).

Annual mean temperature at Acambaro as warming stripes, 1937 to 2012
Year	Annual mean temperature	Difference from the station mean
1937	18.6 C	+0.24 C
1938	18.0 C	-0.29 C
1942	18.0 C	-0.36 C
1943	17.4 C	-0.93 C
1947	18.5 C	+0.17 C
1950	18.0 C	-0.31 C
1951	17.8 C	-0.54 C
1952	17.7 C	-0.59 C
1953	18.0 C	-0.36 C
1954	17.7 C	-0.63 C
1955	17.5 C	-0.86 C
1956	16.8 C	-1.51 C
1957	17.5 C	-0.79 C
1958	17.3 C	-1.03 C
1959	17.6 C	-0.73 C
1960	17.9 C	-0.41 C
1962	17.9 C	-0.39 C
1963	17.7 C	-0.57 C
1964	17.8 C	-0.56 C
1965	17.5 C	-0.81 C
1966	17.1 C	-1.22 C
1967	17.2 C	-1.14 C
1968	17.5 C	-0.83 C
1969	18.5 C	+0.21 C
1970	18.1 C	-0.17 C
1971	18.0 C	-0.28 C
1972	18.7 C	+0.37 C
1974	18.0 C	-0.33 C
1975	17.7 C	-0.62 C
1976	17.7 C	-0.63 C
1977	18.2 C	-0.08 C
1978	18.7 C	+0.37 C
1979	18.9 C	+0.56 C
1980	18.7 C	+0.43 C
1981	18.5 C	+0.16 C
1982	19.1 C	+0.80 C
1983	18.4 C	+0.12 C
1984	18.5 C	+0.22 C
1985	18.7 C	+0.38 C
1987	19.0 C	+0.71 C
1988	18.5 C	+0.19 C
1989	18.6 C	+0.28 C
1991	18.9 C	+0.63 C
1992	18.6 C	+0.26 C
1993	19.0 C	+0.73 C
1994	19.2 C	+0.92 C
1995	19.1 C	+0.79 C
1996	18.6 C	+0.31 C
1997	18.8 C	+0.49 C
1998	19.4 C	+1.10 C
1999	18.1 C	-0.26 C
2000	18.6 C	+0.26 C
2001	18.6 C	+0.32 C
2003	19.2 C	+0.87 C
2004	18.7 C	+0.43 C
2005	19.6 C	+1.26 C
2006	19.2 C	+0.91 C
2008	18.9 C	+0.62 C
2009	19.7 C	+1.35 C
2012	19.2 C	+0.86 C

The annual mean temperature here has risen by 0.2 C (0.2 to 0.3) per decade over 1937 to 2012. In Fahrenheit: 0.4 F (0.3 to 0.5) per decade. The slope is a straight line fitted to 60 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Acambaro
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	1937 to 2012	60	Rise
Mean daily maximum	0.3 C (0.2 to 0.4) per decade	0.6 F (0.4 to 0.8) per decade	1937 to 2012	60	Rise
Mean daily minimum	0.2 C (0.1 to 0.2) per decade	0.3 F (0.2 to 0.4) per decade	1937 to 2012	60	Rise

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

1937 to 2013

Yearly extremes at Acambaro: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	40.0 C (104.0 F)	1983	34.2 C (93.5 F)	76
Coldest night (TNn)	-6.1 C (21.0 F)	1943	0.0 C (32.0 F)	76
Wettest day (Rx1day)	97.5 mm (3.8 in)	1991	46.0 mm (1.8 in)	76
Wettest five days (Rx5day)	225.5 mm (8.9 in)	2003	88.1 mm (3.5 in)	76
Longest dry spell (CDD)	130 days	1939	65 days	76

Hottest day (TXx)

The hottest day of the year at Acambaro, 1937 to 2013. The record is 40.0 C (104.0 F) in 1983, marked on the chart; the median year is 34.2 C (93.5 F).

Hottest day (TXx) at Acambaro by year
Year	Hottest day (TXx)
1937	33.9 C (93.0 F)
1938	32.8 C (91.0 F)
1939	33.3 C (91.9 F)
1941	28.9 C (84.0 F)
1942	33.3 C (91.9 F)
1943	35.0 C (95.0 F)
1944	31.7 C (89.1 F)
1945	31.7 C (89.1 F)
1946	36.1 C (97.0 F)
1947	33.9 C (93.0 F)
1948	35.0 C (95.0 F)
1949	35.0 C (95.0 F)
1950	35.0 C (95.0 F)
1951	32.8 C (91.0 F)
1952	33.3 C (91.9 F)
1953	33.9 C (93.0 F)
1954	36.7 C (98.1 F)
1955	33.3 C (91.9 F)
1956	31.7 C (89.1 F)
1957	32.8 C (91.0 F)
1958	32.2 C (90.0 F)
1959	31.7 C (89.1 F)
1960	33.3 C (91.9 F)
1961	33.3 C (91.9 F)
1962	33.3 C (91.9 F)
1963	33.9 C (93.0 F)
1964	33.9 C (93.0 F)
1965	33.3 C (91.9 F)
1966	32.2 C (90.0 F)
1967	34.4 C (93.9 F)
1968	31.7 C (89.1 F)
1969	33.3 C (91.9 F)
1970	33.9 C (93.0 F)
1971	32.8 C (91.0 F)
1972	33.3 C (91.9 F)
1973	33.9 C (93.0 F)
1974	33.9 C (93.0 F)
1975	32.8 C (91.0 F)
1976	32.2 C (90.0 F)
1977	33.9 C (93.0 F)
1978	35.0 C (95.0 F)
1979	33.3 C (91.9 F)
1980	32.8 C (91.0 F)
1981	32.8 C (91.0 F)
1982	34.4 C (93.9 F)
1983	40.0 C (104.0 F)
1984	34.4 C (93.9 F)
1985	34.4 C (93.9 F)
1986	35.6 C (96.1 F)
1987	33.9 C (93.0 F)
1988	35.0 C (95.0 F)
1989	35.0 C (95.0 F)
1990	35.0 C (95.0 F)
1991	35.0 C (95.0 F)
1992	35.0 C (95.0 F)
1993	39.4 C (102.9 F)
1994	35.6 C (96.1 F)
1995	36.1 C (97.0 F)
1996	36.1 C (97.0 F)
1997	35.0 C (95.0 F)
1998	39.4 C (102.9 F)
1999	35.0 C (95.0 F)
2000	35.0 C (95.0 F)
2001	36.1 C (97.0 F)
2002	35.6 C (96.1 F)
2003	36.7 C (98.1 F)
2004	33.9 C (93.0 F)
2005	36.7 C (98.1 F)
2006	35.6 C (96.1 F)
2007	35.6 C (96.1 F)
2008	36.7 C (98.1 F)
2009	37.8 C (100.0 F)
2010	35.0 C (95.0 F)
2011	36.7 C (98.1 F)
2012	35.6 C (96.1 F)
2013	36.7 C (98.1 F)

Coldest night (TNn)

The coldest night of the year at Acambaro, 1937 to 2013. The record is -6.1 C (21.0 F) in 1943, marked on the chart; the median year is 0.0 C (32.0 F).

Coldest night (TNn) at Acambaro by year
Year	Coldest night (TNn)
1937	-0.6 C (30.9 F)
1938	-2.2 C (28.0 F)
1939	-1.1 C (30.0 F)
1941	3.9 C (39.0 F)
1942	-4.4 C (24.1 F)
1943	-6.1 C (21.0 F)
1944	0.0 C (32.0 F)
1945	2.2 C (36.0 F)
1946	2.8 C (37.0 F)
1947	1.1 C (34.0 F)
1948	0.6 C (33.1 F)
1949	-2.2 C (28.0 F)
1950	-2.2 C (28.0 F)
1951	-2.2 C (28.0 F)
1952	-2.8 C (27.0 F)
1953	-1.7 C (28.9 F)
1954	-3.3 C (26.1 F)
1955	-3.3 C (26.1 F)
1956	-3.9 C (25.0 F)
1957	-2.8 C (27.0 F)
1958	-0.6 C (30.9 F)
1959	-1.7 C (28.9 F)
1960	-2.8 C (27.0 F)
1961	-1.1 C (30.0 F)
1962	0.0 C (32.0 F)
1963	-2.2 C (28.0 F)
1964	0.6 C (33.1 F)
1965	0.0 C (32.0 F)
1966	-1.1 C (30.0 F)
1967	-0.6 C (30.9 F)
1968	0.0 C (32.0 F)
1969	0.0 C (32.0 F)
1970	0.0 C (32.0 F)
1971	1.1 C (34.0 F)
1972	0.6 C (33.1 F)
1973	0.0 C (32.0 F)
1974	-1.1 C (30.0 F)
1975	-2.8 C (27.0 F)
1976	-2.2 C (28.0 F)
1977	0.0 C (32.0 F)
1978	2.2 C (36.0 F)
1979	0.6 C (33.1 F)
1980	0.6 C (33.1 F)
1981	0.0 C (32.0 F)
1982	1.7 C (35.1 F)
1983	0.6 C (33.1 F)
1984	1.7 C (35.1 F)
1985	0.6 C (33.1 F)
1986	-5.0 C (23.0 F)
1987	1.7 C (35.1 F)
1988	0.0 C (32.0 F)
1989	0.6 C (33.1 F)
1990	1.1 C (34.0 F)
1991	2.2 C (36.0 F)
1992	0.6 C (33.1 F)
1993	1.7 C (35.1 F)
1994	1.7 C (35.1 F)
1995	1.7 C (35.1 F)
1996	0.0 C (32.0 F)
1997	-2.2 C (28.0 F)
1998	-1.7 C (28.9 F)
1999	-1.7 C (28.9 F)
2000	0.0 C (32.0 F)
2001	1.7 C (35.1 F)
2002	-1.1 C (30.0 F)
2003	0.0 C (32.0 F)
2004	0.6 C (33.1 F)
2005	1.7 C (35.1 F)
2006	-1.1 C (30.0 F)
2007	3.9 C (39.0 F)
2008	0.6 C (33.1 F)
2009	2.8 C (37.0 F)
2010	-1.1 C (30.0 F)
2011	-1.1 C (30.0 F)
2012	3.9 C (39.0 F)
2013	0.6 C (33.1 F)

Wettest day (Rx1day)

The wettest day of the year at Acambaro, 1937 to 2013. The record is 97.5 mm (3.8 in) in 1991, marked on the chart; the median year is 46.0 mm (1.8 in).

Wettest day (Rx1day) at Acambaro by year
Year	Wettest day (Rx1day)
1937	55.9 mm (2.2 in)
1938	58.4 mm (2.3 in)
1939	16.0 mm (0.6 in)
1941	39.9 mm (1.6 in)
1942	64.8 mm (2.6 in)
1943	49.8 mm (2.0 in)
1944	54.9 mm (2.2 in)
1945	1.8 mm (0.07 in)
1946	35.8 mm (1.4 in)
1947	35.8 mm (1.4 in)
1948	31.8 mm (1.3 in)
1949	35.3 mm (1.4 in)
1950	25.4 mm (1.0 in)
1951	54.9 mm (2.2 in)
1952	54.9 mm (2.2 in)
1953	34.3 mm (1.4 in)
1954	35.1 mm (1.4 in)
1955	56.9 mm (2.2 in)
1956	36.8 mm (1.4 in)
1957	31.5 mm (1.2 in)
1958	41.1 mm (1.6 in)
1959	37.3 mm (1.5 in)
1960	34.0 mm (1.3 in)
1961	52.6 mm (2.1 in)
1962	30.5 mm (1.2 in)
1963	35.1 mm (1.4 in)
1964	45.0 mm (1.8 in)
1965	36.3 mm (1.4 in)
1966	42.2 mm (1.7 in)
1967	46.5 mm (1.8 in)
1968	32.0 mm (1.3 in)
1969	33.3 mm (1.3 in)
1970	56.4 mm (2.2 in)
1971	40.9 mm (1.6 in)
1972	47.8 mm (1.9 in)
1973	35.1 mm (1.4 in)
1974	46.0 mm (1.8 in)
1975	73.4 mm (2.9 in)
1976	37.3 mm (1.5 in)
1977	47.8 mm (1.9 in)
1978	37.1 mm (1.5 in)
1979	47.0 mm (1.9 in)
1980	42.4 mm (1.7 in)
1981	55.4 mm (2.2 in)
1982	37.6 mm (1.5 in)
1983	53.8 mm (2.1 in)
1984	47.0 mm (1.9 in)
1985	57.4 mm (2.3 in)
1986	30.0 mm (1.2 in)
1987	34.3 mm (1.4 in)
1988	63.2 mm (2.5 in)
1989	32.8 mm (1.3 in)
1990	52.6 mm (2.1 in)
1991	97.5 mm (3.8 in)
1992	70.9 mm (2.8 in)
1993	37.3 mm (1.5 in)
1994	54.1 mm (2.1 in)
1995	48.3 mm (1.9 in)
1996	46.0 mm (1.8 in)
1997	43.2 mm (1.7 in)
1998	50.5 mm (2.0 in)
1999	38.9 mm (1.5 in)
2000	47.8 mm (1.9 in)
2001	61.5 mm (2.4 in)
2002	38.4 mm (1.5 in)
2003	69.9 mm (2.8 in)
2004	61.0 mm (2.4 in)
2005	52.8 mm (2.1 in)
2006	46.5 mm (1.8 in)
2007	46.0 mm (1.8 in)
2008	56.9 mm (2.2 in)
2009	95.3 mm (3.8 in)
2010	51.3 mm (2.0 in)
2011	59.2 mm (2.3 in)
2012	41.9 mm (1.6 in)
2013	8.9 mm (0.35 in)

Wettest five days (Rx5day)

The wettest five days of the year at Acambaro, 1937 to 2013. The record is 225.5 mm (8.9 in) in 2003, marked on the chart; the median year is 88.1 mm (3.5 in).

Wettest five days (Rx5day) at Acambaro by year
Year	Wettest five days (Rx5day)
1937	142.9 mm (5.6 in)
1938	95.7 mm (3.8 in)
1939	20.2 mm (0.8 in)
1941	69.8 mm (2.7 in)
1942	139.5 mm (5.5 in)
1943	72.1 mm (2.8 in)
1944	113.9 mm (4.5 in)
1945	1.8 mm (0.07 in)
1946	99.6 mm (3.9 in)
1947	77.5 mm (3.1 in)
1948	95.3 mm (3.8 in)
1949	87.7 mm (3.5 in)
1950	63.7 mm (2.5 in)
1951	64.0 mm (2.5 in)
1952	97.4 mm (3.8 in)
1953	69.2 mm (2.7 in)
1954	75.3 mm (3.0 in)
1955	77.0 mm (3.0 in)
1956	78.7 mm (3.1 in)
1957	61.3 mm (2.4 in)
1958	80.8 mm (3.2 in)
1959	78.7 mm (3.1 in)
1960	75.8 mm (3.0 in)
1961	86.9 mm (3.4 in)
1962	86.1 mm (3.4 in)
1963	69.1 mm (2.7 in)
1964	99.4 mm (3.9 in)
1965	103.9 mm (4.1 in)
1966	94.2 mm (3.7 in)
1967	140.3 mm (5.5 in)
1968	62.0 mm (2.4 in)
1969	82.0 mm (3.2 in)
1970	90.2 mm (3.6 in)
1971	111.8 mm (4.4 in)
1972	64.1 mm (2.5 in)
1973	85.3 mm (3.4 in)
1974	65.0 mm (2.6 in)
1975	117.4 mm (4.6 in)
1976	90.5 mm (3.6 in)
1977	67.9 mm (2.7 in)
1978	99.3 mm (3.9 in)
1979	109.0 mm (4.3 in)
1980	99.1 mm (3.9 in)
1981	95.0 mm (3.7 in)
1982	104.4 mm (4.1 in)
1983	145.0 mm (5.7 in)
1984	91.4 mm (3.6 in)
1985	118.2 mm (4.7 in)
1986	50.9 mm (2.0 in)
1987	74.9 mm (2.9 in)
1988	123.3 mm (4.9 in)
1989	82.6 mm (3.3 in)
1990	100.7 mm (4.0 in)
1991	116.8 mm (4.6 in)
1992	87.7 mm (3.5 in)
1993	72.8 mm (2.9 in)
1994	116.4 mm (4.6 in)
1995	74.8 mm (2.9 in)
1996	69.9 mm (2.8 in)
1997	85.9 mm (3.4 in)
1998	104.8 mm (4.1 in)
1999	137.2 mm (5.4 in)
2000	96.1 mm (3.8 in)
2001	95.6 mm (3.8 in)
2002	83.4 mm (3.3 in)
2003	225.5 mm (8.9 in)
2004	134.5 mm (5.3 in)
2005	83.9 mm (3.3 in)
2006	95.6 mm (3.8 in)
2007	88.4 mm (3.5 in)
2008	116.6 mm (4.6 in)
2009	136.9 mm (5.4 in)
2010	122.4 mm (4.8 in)
2011	83.6 mm (3.3 in)
2012	69.6 mm (2.7 in)
2013	8.9 mm (0.35 in)

Longest dry spell (CDD)

The longest dry spell of the year at Acambaro, 1937 to 2013. The record is 130 days in 1939, marked on the chart; the median year is 65 days.

Longest dry spell (CDD) at Acambaro by year
Year	Longest dry spell (CDD)
1937	35 days
1938	69 days
1939	130 days
1941	19 days
1942	80 days
1943	118 days
1944	65 days
1945	83 days
1946	34 days
1947	104 days
1948	44 days
1949	71 days
1950	71 days
1951	73 days
1952	53 days
1953	73 days
1954	55 days
1955	100 days
1956	59 days
1957	48 days
1958	54 days
1959	50 days
1960	37 days
1961	93 days
1962	103 days
1963	78 days
1964	63 days
1965	43 days
1966	72 days
1967	50 days
1968	31 days
1969	79 days
1970	69 days
1971	61 days
1972	42 days
1973	94 days
1974	41 days
1975	98 days
1976	59 days
1977	81 days
1978	65 days
1979	101 days
1980	58 days
1981	37 days
1982	45 days
1983	69 days
1984	54 days
1985	71 days
1986	104 days
1987	109 days
1988	53 days
1989	60 days
1990	47 days
1991	62 days
1992	45 days
1993	59 days
1994	88 days
1995	35 days
1996	109 days
1997	49 days
1998	93 days
1999	103 days
2000	69 days
2001	65 days
2002	44 days
2003	71 days
2004	49 days
2005	68 days
2006	58 days
2007	49 days
2008	102 days
2009	86 days
2010	125 days
2011	104 days
2012	67 days
2013	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

71 years, 1937 to 2012

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 92.6 mm (3.6 in) of rain is expected about once in 100 years.

Rainfall return levels at Acambaro: 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	56.7 mm (2.2 in)
10 years	65.0 mm (2.6 in)
25 years	75.8 mm (3.0 in)
50 years	84.1 mm (3.3 in)
100 years	92.6 mm (3.6 in)	Longer than the 71 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, 71 years of values from 1937 to 2012.

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: 97.5 mm (3.8 in) in 1991; 95.3 mm (3.8 in) in 2009; 73.4 mm (2.9 in) in 1975.

Station Changes

1 suspected

One change was suspected in the annual mean temperature of Acambaro, at 1975. Each is measured against neighbouring stations.

Relative to 5 neighbouring stations, the station's annual mean temperature from 1975 ran 0.3 C (0.6 F) lower than in the years before (possible change).

Suspected changes in the annual mean temperature at Acambaro, against neighbouring stations
Year	Shift (C)	Shift (F)	Strength	Neighbours
1975	-0.3	-0.6	possible	5

Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.

Download the Data

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