Apatzingan (Smn) Weather Records (MXN00016007)

Record envelope, standing records and threshold days for Apatzingan (Smn) (MXN00016007), Mexico, with 91 years of record.

Key Facts for Apatzingan (Smn)

Apatzingan (Smn) (MXN00016007) is a weather station in Mexico at 19.08 latitude and -102.35 longitude, 320 m (1,049 ft) above sea level.
The station reports from 1922 to 2012, 91 years of record.
1,464 records set at Apatzingan (Smn) still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Apatzingan (Smn) set a daily record low minimum temperature of 18.3 C (64.9 F) on 4 October 2012.

About the Station

Location: Mexico, 19.08 latitude, -102.35 longitude.
Elevation: 320 m (1,049 ft).
Period of record: 1922 to 2012, 91 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 Apatzingan (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 Apatzingan (Smn), with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	40.6 C (105.1 F)	5.0 C (41.0 F)	n/a	n/a
Feb	45.0 C (113.0 F)	5.0 C (41.0 F)	n/a	n/a
Mar	42.8 C (109.0 F)	6.1 C (43.0 F)	n/a	n/a
Apr	43.9 C (111.0 F)	10.0 C (50.0 F)	n/a	n/a
May	46.1 C (115.0 F)	10.0 C (50.0 F)	n/a	n/a
Jun	43.9 C (111.0 F)	11.1 C (52.0 F)	n/a	n/a
Jul	44.4 C (111.9 F)	16.7 C (62.1 F)	n/a	n/a
Aug	41.7 C (107.1 F)	15.6 C (60.1 F)	n/a	n/a
Sep	40.0 C (104.0 F)	14.4 C (57.9 F)	n/a	n/a
Oct	42.8 C (109.0 F)	9.4 C (48.9 F)	n/a	n/a
Nov	42.8 C (109.0 F)	7.8 C (46.0 F)	n/a	n/a
Dec	41.7 C (107.1 F)	4.4 C (39.9 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Apatzingan (Smn) still stand. 1923 holds the most, with 413.

Standing records at Apatzingan (Smn) by the year they were set
Year set	Standing records
1922	47
1923	413
1924	64
1925	13
1926	3
1928	2
1929	7
1930	74
1931	66
1932	56
1933	57
1934	7
1935	5
1936	3
1937	9
1938	20
1939	17
1940	4
1941	5
1942	7
1943	5
1944	2
1946	2
1947	3
1951	2
1952	1
1953	1
1954	22
1956	3
1957	8
1958	12
1959	2
1960	12
1961	13
1963	1
1964	1
1965	3
1966	2
1967	4
1968	4
1969	12
1970	1
1971	3
1972	24
1973	62
1974	75
1975	26
1976	33
1977	21
1978	49
1979	47
1980	25
1981	3
1982	1
1983	6
1984	4
1986	4
1987	3
1989	1
1991	3
1992	7
1993	2
1994	1
1995	7
1996	5
1997	3
2000	1
2001	16
2002	7
2003	1
2004	6
2005	2
2007	1
2008	3
2009	1
2010	10
2011	2
2012	4

All-Time Record Progression

14 new records

14 all-time records were set at Apatzingan (Smn) between 29 May 1971 and 8 January 2010. Each dot is a new record.

When Apatzingan (Smn) set new all-time records
Date	Kind	Detail
1971-05-29	Record high maximum temperature	Record high maximum temperature 46.1 C (115.0 F)
1972-04-14	Record high minimum temperature	Record high minimum temperature 29.4 C (84.9 F)
1973-05-03	Record high minimum temperature	Record high minimum temperature 30.0 C (86.0 F)
1973-05-05	Record high minimum temperature	Record high minimum temperature 30.6 C (87.1 F)
1973-05-08	Record high minimum temperature	Record high minimum temperature 31.7 C (89.1 F)
1973-05-11	Record high minimum temperature	Record high minimum temperature 32.8 C (91.0 F)
1973-05-17	Record high minimum temperature	Record high minimum temperature 33.9 C (93.0 F)
1973-05-29	Record high minimum temperature	Record high minimum temperature 35.0 C (95.0 F)
1973-06-02	Record high minimum temperature	Record high minimum temperature 35.6 C (96.1 F)
1975-05-19	Record high minimum temperature	Record high minimum temperature 36.1 C (97.0 F)
1975-06-02	Record high minimum temperature	Record high minimum temperature 36.7 C (98.1 F)
1981-09-29	Record daily precipitation	Record daily precipitation 188.5 mm (7.4 in)
1992-01-28	Record low maximum temperature	Record low maximum temperature 19.4 C (66.9 F)
2010-01-08	Record low maximum temperature	Record low maximum temperature 18.9 C (66.0 F)

Wettest Day of Each Month

Sep: 188.5 mm (7.4 in)

The wettest day on record for each calendar month at Apatzingan (Smn). The most was 188.5 mm (7.4 in) on 29 September 1981.

Record daily precipitation for each month at Apatzingan (Smn)
Month	Record daily precipitation (mm)	Date
Jan	69.9 mm (2.8 in)	16 January 1992
Feb	51.3 mm (2.0 in)	3 February 2010
Mar	22.4 mm (0.9 in)	5 March 1968
Apr	39.9 mm (1.6 in)	16 April 1959
May	69.3 mm (2.7 in)	26 May 1983
Jun	116.8 mm (4.6 in)	21 June 2003
Jul	182.4 mm (7.2 in)	13 July 1997
Aug	112.8 mm (4.4 in)	25 August 1962
Sep	188.5 mm (7.4 in)	29 September 1981
Oct	129.5 mm (5.1 in)	15 October 1923
Nov	87.9 mm (3.5 in)	2 November 1972
Dec	57.9 mm (2.3 in)	16 December 1925

Period of Record Coverage

1922 to 2012

91 years of record at Apatzingan (Smn), 1922 to 2012. 4 years have data for under 90 percent of days and are left out of rankings: 1922, 1924, 1935, 2012.

Days with data per year at Apatzingan (Smn)
Year	Days with data	Share of year	Complete
1922	112	31%	No
1923	354	97%	Yes
1924	183	50%	No
1925	364	100%	Yes
1926	364	100%	Yes
1927	365	100%	Yes
1928	366	100%	Yes
1929	365	100%	Yes
1930	365	100%	Yes
1931	365	100%	Yes
1932	366	100%	Yes
1933	365	100%	Yes
1934	365	100%	Yes
1935	211	58%	No
1936	366	100%	Yes
1937	365	100%	Yes
1938	365	100%	Yes
1939	365	100%	Yes
1940	365	100%	Yes
1941	365	100%	Yes
1942	364	100%	Yes
1943	359	98%	Yes
1944	365	100%	Yes
1945	364	100%	Yes
1946	364	100%	Yes
1947	334	92%	Yes
1948	366	100%	Yes
1949	365	100%	Yes
1950	365	100%	Yes
1951	362	99%	Yes
1952	366	100%	Yes
1953	365	100%	Yes
1954	365	100%	Yes
1955	365	100%	Yes
1956	363	99%	Yes
1957	365	100%	Yes
1958	365	100%	Yes
1959	365	100%	Yes
1960	366	100%	Yes
1961	364	100%	Yes
1962	364	100%	Yes
1963	365	100%	Yes
1964	366	100%	Yes
1965	364	100%	Yes
1966	365	100%	Yes
1967	364	100%	Yes
1968	366	100%	Yes
1969	365	100%	Yes
1970	365	100%	Yes
1971	365	100%	Yes
1972	366	100%	Yes
1973	331	91%	Yes
1974	340	93%	Yes
1975	365	100%	Yes
1976	336	92%	Yes
1977	364	100%	Yes
1978	363	99%	Yes
1979	365	100%	Yes
1980	366	100%	Yes
1981	365	100%	Yes
1982	365	100%	Yes
1983	365	100%	Yes
1984	366	100%	Yes
1985	365	100%	Yes
1986	335	92%	Yes
1987	365	100%	Yes
1988	365	100%	Yes
1989	365	100%	Yes
1990	365	100%	Yes
1991	365	100%	Yes
1992	365	100%	Yes
1993	365	100%	Yes
1994	365	100%	Yes
1995	365	100%	Yes
1996	366	100%	Yes
1997	364	100%	Yes
1998	342	94%	Yes
1999	365	100%	Yes
2000	354	97%	Yes
2001	364	100%	Yes
2002	365	100%	Yes
2003	365	100%	Yes
2004	365	100%	Yes
2005	365	100%	Yes
2006	365	100%	Yes
2007	365	100%	Yes
2008	366	100%	Yes
2009	364	100%	Yes
2010	363	99%	Yes
2011	365	100%	Yes
2012	302	83%	No

Latest Records

Latest records at Apatzingan (Smn)
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
4 October 2012	Apatzingan (Smn), MX	daily low min	18.3 C (64.9 F)	0.6 C (1.1 F)	77 years	34 of 100 (Routine)
17 September 2012	Apatzingan (Smn), MX	daily low min (Tie)	20.0 C (68.0 F)	tie	83 years	8 of 100 (Routine)
16 May 2012	Apatzingan (Smn), MX	daily rain	33.3 mm (1.3 in)	12.2 mm (0.5 in)	85 years	45 of 100 (Notable)
15 May 2012	Apatzingan (Smn), MX	daily rain	34.8 mm (1.4 in)	19.3 mm (0.8 in)	45 years	40 of 100 (Notable)
13 May 2012	Apatzingan (Smn), MX	daily low max (Tie)	35.6 C (96.1 F)	tie	11 years	3 of 100 (Routine)
22 April 2012	Apatzingan (Smn), MX	monthly high max	43.9 C (111.0 F)	0.6 C (1.1 F)	54 years	38 of 100 (Notable)
5 April 2012	Apatzingan (Smn), MX	daily low max (Tie)	31.7 C (89.1 F)	tie	39 years	5 of 100 (Routine)
15 February 2012	Apatzingan (Smn), MX	daily low max (Tie)	25.0 C (77.0 F)	tie	88 years	8 of 100 (Routine)
13 February 2012	Apatzingan (Smn), MX	daily low max	23.9 C (75.0 F)	1.1 C (2.0 F)	88 years	38 of 100 (Notable)
12 February 2012	Apatzingan (Smn), MX	daily low max	25.0 C (77.0 F)	0.6 C (1.1 F)	40 years	23 of 100 (Routine)
11 February 2012	Apatzingan (Smn), MX	daily rain	7.9 mm (0.31 in)	6.1 mm (0.24 in)	45 years	20 of 100 (Routine)
10 February 2012	Apatzingan (Smn), MX	daily rain	27.9 mm (1.1 in)	14.9 mm (0.6 in)	85 years	48 of 100 (Notable)
9 February 2012	Apatzingan (Smn), MX	daily rain	11.9 mm (0.5 in)	10.6 mm (0.4 in)	45 years	20 of 100 (Routine)
30 September 2011	Apatzingan (Smn), MX	daily low min (Tie)	19.4 C (66.9 F)	tie	20 years	3 of 100 (Routine)
10 September 2011	Apatzingan (Smn), MX	daily low min	18.9 C (66.0 F)	1.1 C (2.0 F)	81 years	40 of 100 (Notable)
31 August 2011	Apatzingan (Smn), MX	daily rain	37.8 mm (1.5 in)	1.0 mm (0.04 in)	30 years	18 of 100 (Routine)
27 July 2011	Apatzingan (Smn), MX	daily rain (Tie)	46.5 mm (1.8 in)	tie	38 years	5 of 100 (Routine)
8 April 2011	Apatzingan (Smn), MX	daily low max	31.7 C (89.1 F)	0.5 C (0.9 F)	37 years	22 of 100 (Routine)
23 October 2010	Apatzingan (Smn), MX	daily low max (Tie)	23.9 C (75.0 F)	tie	87 years	8 of 100 (Routine)
15 October 2010	Apatzingan (Smn), MX	daily low min	17.8 C (64.0 F)	0.5 C (0.9 F)	57 years	27 of 100 (Routine)

Climate Trend

79 complete years, 1925 to 2011

One stripe for each of 79 complete years at Apatzingan (Smn), 1925 to 2011. Blue stripes are years cooler than the station's own mean of 27.8 C (82.1 F); red stripes are warmer. The coolest year was 2010, at 26.0 C (78.8 F), and the warmest was 1979, at 31.2 C (88.2 F). The strongest colour marks a difference of 3.4 C (6.1 F).

Annual mean temperature at Apatzingan (Smn) as warming stripes, 1925 to 2011
Year	Annual mean temperature	Difference from the station mean
1925	27.7 C	-0.08 C
1926	27.9 C	+0.06 C
1927	27.6 C	-0.23 C
1928	28.9 C	+1.04 C
1929	28.3 C	+0.44 C
1930	28.1 C	+0.26 C
1931	28.2 C	+0.33 C
1932	28.8 C	+0.94 C
1933	28.1 C	+0.23 C
1934	28.0 C	+0.21 C
1936	27.8 C	-0.03 C
1937	28.3 C	+0.48 C
1938	28.3 C	+0.43 C
1939	28.1 C	+0.30 C
1940	28.5 C	+0.72 C
1941	28.6 C	+0.79 C
1942	28.5 C	+0.67 C
1943	27.9 C	+0.03 C
1944	27.8 C	+0.01 C
1945	28.5 C	+0.65 C
1946	28.1 C	+0.25 C
1948	28.2 C	+0.42 C
1949	27.6 C	-0.23 C
1950	28.0 C	+0.20 C
1951	27.9 C	+0.04 C
1952	27.7 C	-0.14 C
1953	28.3 C	+0.52 C
1954	28.6 C	+0.75 C
1955	27.8 C	-0.04 C
1956	27.9 C	+0.09 C
1957	29.4 C	+1.57 C
1958	28.5 C	+0.70 C
1959	28.9 C	+1.11 C
1960	28.7 C	+0.83 C
1961	28.3 C	+0.46 C
1962	28.2 C	+0.39 C
1963	28.0 C	+0.19 C
1964	28.2 C	+0.33 C
1965	28.1 C	+0.32 C
1966	27.4 C	-0.38 C
1967	27.1 C	-0.68 C
1968	27.1 C	-0.70 C
1969	28.4 C	+0.57 C
1970	28.0 C	+0.20 C
1971	28.2 C	+0.42 C
1972	26.4 C	-1.46 C
1977	30.6 C	+2.80 C
1978	30.7 C	+2.91 C
1979	31.2 C	+3.39 C
1980	29.1 C	+1.31 C
1981	26.9 C	-0.97 C
1982	27.7 C	-0.08 C
1983	26.7 C	-1.17 C
1984	26.8 C	-1.04 C
1985	27.2 C	-0.65 C
1986	27.1 C	-0.76 C
1987	27.4 C	-0.40 C
1988	27.2 C	-0.61 C
1989	27.2 C	-0.66 C
1990	27.3 C	-0.48 C
1991	27.6 C	-0.21 C
1992	26.5 C	-1.33 C
1993	27.5 C	-0.28 C
1994	28.3 C	+0.45 C
1995	28.1 C	+0.24 C
1996	27.1 C	-0.76 C
1997	27.6 C	-0.19 C
1999	27.0 C	-0.86 C
2001	27.2 C	-0.64 C
2002	26.7 C	-1.09 C
2003	26.5 C	-1.34 C
2004	26.3 C	-1.48 C
2005	26.6 C	-1.26 C
2006	26.6 C	-1.20 C
2007	26.8 C	-1.02 C
2008	26.3 C	-1.55 C
2009	26.9 C	-0.95 C
2010	26.0 C	-1.83 C
2011	26.7 C	-1.14 C

The annual mean temperature here has fallen by 0.2 C (0.1 to 0.3) per decade over 1925 to 2011. In Fahrenheit: 0.3 F (0.2 to 0.5) per decade. The slope is a straight line fitted to 79 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Apatzingan (Smn)
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	-0.2 C (-0.3 to -0.1) per decade	-0.3 F (-0.5 to -0.2) per decade	1925 to 2011	79	Fall
Mean daily maximum	-0.10 C (-0.18 to -0.01) per decade	-0.17 F (-0.32 to -0.03) per decade	1925 to 2011	79	Fall
Mean daily minimum	-0.3 C (-0.4 to -0.1) per decade	-0.5 F (-0.7 to -0.3) per decade	1925 to 2011	79	Fall

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

1922 to 2012

Yearly extremes at Apatzingan (Smn): the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	46.1 C (115.0 F)	1971	41.7 C (107.1 F)	91
Coldest night (TNn)	4.4 C (39.9 F)	1923	11.7 C (53.1 F)	91
Wettest day (Rx1day)	188.5 mm (7.4 in)	1981	64.8 mm (2.6 in)	91
Wettest five days (Rx5day)	266.8 mm (10.5 in)	1997	107.7 mm (4.2 in)	91
Longest dry spell (CDD)	166 days	1940	112 days	91

Hottest day (TXx)

The hottest day of the year at Apatzingan (Smn), 1922 to 2012. The record is 46.1 C (115.0 F) in 1971, marked on the chart; the median year is 41.7 C (107.1 F).

Hottest day (TXx) at Apatzingan (Smn) by year
Year	Hottest day (TXx)
1922	33.3 C (91.9 F)
1923	35.6 C (96.1 F)
1924	32.8 C (91.0 F)
1925	42.2 C (108.0 F)
1926	40.6 C (105.1 F)
1927	40.0 C (104.0 F)
1928	40.6 C (105.1 F)
1929	40.6 C (105.1 F)
1930	41.1 C (106.0 F)
1931	42.8 C (109.0 F)
1932	41.7 C (107.1 F)
1933	45.0 C (113.0 F)
1934	42.2 C (108.0 F)
1935	37.2 C (99.0 F)
1936	42.2 C (108.0 F)
1937	42.2 C (108.0 F)
1938	42.8 C (109.0 F)
1939	42.2 C (108.0 F)
1940	42.8 C (109.0 F)
1941	42.8 C (109.0 F)
1942	42.2 C (108.0 F)
1943	41.1 C (106.0 F)
1944	45.0 C (113.0 F)
1945	41.7 C (107.1 F)
1946	42.8 C (109.0 F)
1947	41.7 C (107.1 F)
1948	41.1 C (106.0 F)
1949	40.6 C (105.1 F)
1950	40.0 C (104.0 F)
1951	40.6 C (105.1 F)
1952	41.7 C (107.1 F)
1953	41.7 C (107.1 F)
1954	41.7 C (107.1 F)
1955	41.7 C (107.1 F)
1956	41.7 C (107.1 F)
1957	43.9 C (111.0 F)
1958	43.3 C (109.9 F)
1959	42.2 C (108.0 F)
1960	43.9 C (111.0 F)
1961	42.8 C (109.0 F)
1962	41.7 C (107.1 F)
1963	41.7 C (107.1 F)
1964	42.8 C (109.0 F)
1965	42.2 C (108.0 F)
1966	42.2 C (108.0 F)
1967	40.6 C (105.1 F)
1968	41.7 C (107.1 F)
1969	43.9 C (111.0 F)
1970	42.2 C (108.0 F)
1971	46.1 C (115.0 F)
1972	42.2 C (108.0 F)
1973	41.1 C (106.0 F)
1974	41.1 C (106.0 F)
1975	41.1 C (106.0 F)
1976	40.6 C (105.1 F)
1977	40.6 C (105.1 F)
1978	42.2 C (108.0 F)
1979	42.8 C (109.0 F)
1980	43.9 C (111.0 F)
1981	41.1 C (106.0 F)
1982	41.1 C (106.0 F)
1983	41.1 C (106.0 F)
1984	42.2 C (108.0 F)
1985	41.1 C (106.0 F)
1986	41.7 C (107.1 F)
1987	44.4 C (111.9 F)
1988	40.6 C (105.1 F)
1989	42.8 C (109.0 F)
1990	41.1 C (106.0 F)
1991	41.1 C (106.0 F)
1992	41.1 C (106.0 F)
1993	41.7 C (107.1 F)
1994	42.8 C (109.0 F)
1995	42.8 C (109.0 F)
1996	41.1 C (106.0 F)
1997	41.1 C (106.0 F)
1998	40.6 C (105.1 F)
1999	40.6 C (105.1 F)
2000	40.0 C (104.0 F)
2001	41.7 C (107.1 F)
2002	41.1 C (106.0 F)
2003	40.0 C (104.0 F)
2004	40.0 C (104.0 F)
2005	40.0 C (104.0 F)
2006	40.6 C (105.1 F)
2007	44.4 C (111.9 F)
2008	40.0 C (104.0 F)
2009	40.0 C (104.0 F)
2010	40.6 C (105.1 F)
2011	40.0 C (104.0 F)
2012	43.9 C (111.0 F)

Coldest night (TNn)

The coldest night of the year at Apatzingan (Smn), 1922 to 2012. The record is 4.4 C (39.9 F) in 1923, marked on the chart; the median year is 11.7 C (53.1 F).

Coldest night (TNn) at Apatzingan (Smn) by year
Year	Coldest night (TNn)
1922	8.9 C (48.0 F)
1923	4.4 C (39.9 F)
1924	6.1 C (43.0 F)
1925	15.6 C (60.1 F)
1926	12.8 C (55.0 F)
1927	15.6 C (60.1 F)
1928	15.0 C (59.0 F)
1929	18.3 C (64.9 F)
1930	15.6 C (60.1 F)
1931	13.3 C (55.9 F)
1932	11.1 C (52.0 F)
1933	11.7 C (53.1 F)
1934	11.7 C (53.1 F)
1935	11.1 C (52.0 F)
1936	13.9 C (57.0 F)
1937	11.7 C (53.1 F)
1938	10.0 C (50.0 F)
1939	10.0 C (50.0 F)
1940	10.0 C (50.0 F)
1941	11.7 C (53.1 F)
1942	10.6 C (51.1 F)
1943	10.6 C (51.1 F)
1944	11.7 C (53.1 F)
1945	10.6 C (51.1 F)
1946	13.9 C (57.0 F)
1947	11.7 C (53.1 F)
1948	12.8 C (55.0 F)
1949	13.3 C (55.9 F)
1950	15.0 C (59.0 F)
1951	10.0 C (50.0 F)
1952	13.3 C (55.9 F)
1953	12.8 C (55.0 F)
1954	10.0 C (50.0 F)
1955	12.2 C (54.0 F)
1956	10.0 C (50.0 F)
1957	13.9 C (57.0 F)
1958	12.8 C (55.0 F)
1959	13.3 C (55.9 F)
1960	13.9 C (57.0 F)
1961	11.1 C (52.0 F)
1962	12.2 C (54.0 F)
1963	10.6 C (51.1 F)
1964	11.7 C (53.1 F)
1965	11.1 C (52.0 F)
1966	10.0 C (50.0 F)
1967	10.0 C (50.0 F)
1968	7.2 C (45.0 F)
1969	10.0 C (50.0 F)
1970	12.8 C (55.0 F)
1971	10.0 C (50.0 F)
1972	13.9 C (57.0 F)
1973	13.9 C (57.0 F)
1974	21.1 C (70.0 F)
1975	15.0 C (59.0 F)
1976	14.4 C (57.9 F)
1977	20.0 C (68.0 F)
1978	21.7 C (71.1 F)
1979	20.0 C (68.0 F)
1980	15.0 C (59.0 F)
1981	11.7 C (53.1 F)
1982	12.2 C (54.0 F)
1983	10.6 C (51.1 F)
1984	12.2 C (54.0 F)
1985	13.9 C (57.0 F)
1986	10.0 C (50.0 F)
1987	12.8 C (55.0 F)
1988	10.6 C (51.1 F)
1989	10.0 C (50.0 F)
1990	12.2 C (54.0 F)
1991	12.8 C (55.0 F)
1992	10.6 C (51.1 F)
1993	12.8 C (55.0 F)
1994	13.9 C (57.0 F)
1995	12.2 C (54.0 F)
1996	11.1 C (52.0 F)
1997	8.3 C (46.9 F)
1998	10.0 C (50.0 F)
1999	10.0 C (50.0 F)
2000	10.0 C (50.0 F)
2001	11.1 C (52.0 F)
2002	5.6 C (42.1 F)
2003	10.0 C (50.0 F)
2004	10.6 C (51.1 F)
2005	11.7 C (53.1 F)
2006	10.0 C (50.0 F)
2007	11.1 C (52.0 F)
2008	11.1 C (52.0 F)
2009	10.6 C (51.1 F)
2010	10.6 C (51.1 F)
2011	10.0 C (50.0 F)
2012	10.6 C (51.1 F)

Wettest day (Rx1day)

The wettest day of the year at Apatzingan (Smn), 1922 to 2012. The record is 188.5 mm (7.4 in) in 1981, marked on the chart; the median year is 64.8 mm (2.6 in).

Wettest day (Rx1day) at Apatzingan (Smn) by year
Year	Wettest day (Rx1day)
1922	60.2 mm (2.4 in)
1923	129.5 mm (5.1 in)
1924	60.5 mm (2.4 in)
1925	57.9 mm (2.3 in)
1926	64.3 mm (2.5 in)
1927	64.8 mm (2.6 in)
1928	58.7 mm (2.3 in)
1929	72.4 mm (2.9 in)
1930	69.3 mm (2.7 in)
1931	110.0 mm (4.3 in)
1932	66.8 mm (2.6 in)
1933	63.0 mm (2.5 in)
1934	54.9 mm (2.2 in)
1935	85.9 mm (3.4 in)
1936	63.8 mm (2.5 in)
1937	95.0 mm (3.7 in)
1938	49.8 mm (2.0 in)
1939	64.8 mm (2.6 in)
1940	43.9 mm (1.7 in)
1941	32.8 mm (1.3 in)
1942	48.8 mm (1.9 in)
1943	61.0 mm (2.4 in)
1944	48.3 mm (1.9 in)
1945	61.0 mm (2.4 in)
1946	53.8 mm (2.1 in)
1947	52.3 mm (2.1 in)
1948	91.9 mm (3.6 in)
1949	106.9 mm (4.2 in)
1950	80.8 mm (3.2 in)
1951	75.9 mm (3.0 in)
1952	110.0 mm (4.3 in)
1953	47.0 mm (1.9 in)
1954	64.8 mm (2.6 in)
1955	89.9 mm (3.5 in)
1956	59.9 mm (2.4 in)
1957	46.0 mm (1.8 in)
1958	66.8 mm (2.6 in)
1959	49.8 mm (2.0 in)
1960	43.9 mm (1.7 in)
1961	39.9 mm (1.6 in)
1962	112.8 mm (4.4 in)
1963	65.8 mm (2.6 in)
1964	63.0 mm (2.5 in)
1965	45.0 mm (1.8 in)
1966	69.9 mm (2.8 in)
1967	79.8 mm (3.1 in)
1968	117.9 mm (4.6 in)
1969	62.0 mm (2.4 in)
1970	55.9 mm (2.2 in)
1971	74.9 mm (2.9 in)
1972	87.9 mm (3.5 in)
1973	108.0 mm (4.3 in)
1974	89.9 mm (3.5 in)
1975	68.8 mm (2.7 in)
1976	59.9 mm (2.4 in)
1977	41.9 mm (1.6 in)
1978	86.9 mm (3.4 in)
1979	64.8 mm (2.6 in)
1980	45.0 mm (1.8 in)
1981	188.5 mm (7.4 in)
1982	59.9 mm (2.4 in)
1983	69.3 mm (2.7 in)
1984	95.8 mm (3.8 in)
1985	76.2 mm (3.0 in)
1986	44.5 mm (1.8 in)
1987	88.6 mm (3.5 in)
1988	41.9 mm (1.6 in)
1989	57.7 mm (2.3 in)
1990	79.8 mm (3.1 in)
1991	47.8 mm (1.9 in)
1992	70.9 mm (2.8 in)
1993	36.8 mm (1.4 in)
1994	44.5 mm (1.8 in)
1995	111.0 mm (4.4 in)
1996	85.9 mm (3.4 in)
1997	182.4 mm (7.2 in)
1998	56.9 mm (2.2 in)
1999	84.3 mm (3.3 in)
2000	40.4 mm (1.6 in)
2001	43.9 mm (1.7 in)
2002	51.8 mm (2.0 in)
2003	116.8 mm (4.6 in)
2004	99.8 mm (3.9 in)
2005	59.9 mm (2.4 in)
2006	82.3 mm (3.2 in)
2007	101.9 mm (4.0 in)
2008	88.9 mm (3.5 in)
2009	50.8 mm (2.0 in)
2010	56.9 mm (2.2 in)
2011	66.3 mm (2.6 in)
2012	45.0 mm (1.8 in)

Wettest five days (Rx5day)

The wettest five days of the year at Apatzingan (Smn), 1922 to 2012. The record is 266.8 mm (10.5 in) in 1997, marked on the chart; the median year is 107.7 mm (4.2 in).

Wettest five days (Rx5day) at Apatzingan (Smn) by year
Year	Wettest five days (Rx5day)
1922	107.7 mm (4.2 in)
1923	129.5 mm (5.1 in)
1924	108.3 mm (4.3 in)
1925	98.6 mm (3.9 in)
1926	135.2 mm (5.3 in)
1927	94.3 mm (3.7 in)
1928	152.4 mm (6.0 in)
1929	72.4 mm (2.9 in)
1930	132.8 mm (5.2 in)
1931	155.4 mm (6.1 in)
1932	144.5 mm (5.7 in)
1933	130.3 mm (5.1 in)
1934	77.0 mm (3.0 in)
1935	133.7 mm (5.3 in)
1936	88.5 mm (3.5 in)
1937	118.9 mm (4.7 in)
1938	102.8 mm (4.0 in)
1939	120.0 mm (4.7 in)
1940	67.5 mm (2.7 in)
1941	50.6 mm (2.0 in)
1942	117.2 mm (4.6 in)
1943	64.9 mm (2.6 in)
1944	107.7 mm (4.2 in)
1945	68.1 mm (2.7 in)
1946	75.0 mm (3.0 in)
1947	79.8 mm (3.1 in)
1948	125.5 mm (4.9 in)
1949	111.5 mm (4.4 in)
1950	103.4 mm (4.1 in)
1951	105.9 mm (4.2 in)
1952	129.6 mm (5.1 in)
1953	86.4 mm (3.4 in)
1954	122.7 mm (4.8 in)
1955	146.0 mm (5.7 in)
1956	69.6 mm (2.7 in)
1957	83.6 mm (3.3 in)
1958	91.7 mm (3.6 in)
1959	92.5 mm (3.6 in)
1960	65.2 mm (2.6 in)
1961	86.4 mm (3.4 in)
1962	134.6 mm (5.3 in)
1963	73.2 mm (2.9 in)
1964	84.9 mm (3.3 in)
1965	88.5 mm (3.5 in)
1966	109.2 mm (4.3 in)
1967	115.1 mm (4.5 in)
1968	159.8 mm (6.3 in)
1969	102.7 mm (4.0 in)
1970	113.0 mm (4.4 in)
1971	166.7 mm (6.6 in)
1972	137.0 mm (5.4 in)
1973	161.4 mm (6.4 in)
1974	166.7 mm (6.6 in)
1975	87.6 mm (3.4 in)
1976	148.7 mm (5.9 in)
1977	83.7 mm (3.3 in)
1978	114.9 mm (4.5 in)
1979	65.6 mm (2.6 in)
1980	100.1 mm (3.9 in)
1981	212.6 mm (8.4 in)
1982	128.0 mm (5.0 in)
1983	85.0 mm (3.3 in)
1984	117.7 mm (4.6 in)
1985	121.5 mm (4.8 in)
1986	62.8 mm (2.5 in)
1987	162.3 mm (6.4 in)
1988	70.1 mm (2.8 in)
1989	115.4 mm (4.5 in)
1990	185.0 mm (7.3 in)
1991	77.0 mm (3.0 in)
1992	133.1 mm (5.2 in)
1993	53.6 mm (2.1 in)
1994	81.8 mm (3.2 in)
1995	140.3 mm (5.5 in)
1996	166.6 mm (6.6 in)
1997	266.8 mm (10.5 in)
1998	135.9 mm (5.4 in)
1999	104.4 mm (4.1 in)
2000	81.8 mm (3.2 in)
2001	98.6 mm (3.9 in)
2002	104.7 mm (4.1 in)
2003	158.8 mm (6.3 in)
2004	179.2 mm (7.1 in)
2005	75.7 mm (3.0 in)
2006	89.4 mm (3.5 in)
2007	143.7 mm (5.7 in)
2008	148.0 mm (5.8 in)
2009	78.6 mm (3.1 in)
2010	135.4 mm (5.3 in)
2011	85.7 mm (3.4 in)
2012	85.6 mm (3.4 in)

Longest dry spell (CDD)

The longest dry spell of the year at Apatzingan (Smn), 1922 to 2012. The record is 166 days in 1940, marked on the chart; the median year is 112 days.

Longest dry spell (CDD) at Apatzingan (Smn) by year
Year	Longest dry spell (CDD)
1922	35 days
1923	112 days
1924	87 days
1925	77 days
1926	77 days
1927	112 days
1928	83 days
1929	153 days
1930	138 days
1931	90 days
1932	114 days
1933	133 days
1934	63 days
1935	63 days
1936	63 days
1937	72 days
1938	133 days
1939	126 days
1940	166 days
1941	112 days
1942	140 days
1943	149 days
1944	147 days
1945	35 days
1946	88 days
1947	113 days
1948	76 days
1949	60 days
1950	92 days
1951	83 days
1952	146 days
1953	161 days
1954	147 days
1955	60 days
1956	112 days
1957	96 days
1958	81 days
1959	56 days
1960	147 days
1961	128 days
1962	58 days
1963	128 days
1964	128 days
1965	87 days
1966	68 days
1967	121 days
1968	77 days
1969	104 days
1970	151 days
1971	142 days
1972	144 days
1973	102 days
1974	146 days
1975	133 days
1976	91 days
1977	57 days
1978	99 days
1979	151 days
1980	114 days
1981	57 days
1982	62 days
1983	73 days
1984	127 days
1985	159 days
1986	78 days
1987	123 days
1988	101 days
1989	150 days
1990	64 days
1991	158 days
1992	100 days
1993	137 days
1994	87 days
1995	114 days
1996	148 days
1997	71 days
1998	126 days
1999	163 days
2000	140 days
2001	71 days
2002	89 days
2003	151 days
2004	109 days
2005	94 days
2006	121 days
2007	119 days
2008	103 days
2009	136 days
2010	113 days
2011	101 days
2012	93 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

87 years, 1923 to 2011

A day with at least 65.3 mm (2.6 in) of rain is expected about once in 2 years. A day with at least 174.4 mm (6.9 in) of rain is expected about once in 100 years.

Rainfall return levels at Apatzingan (Smn): the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	65.3 mm (2.6 in)
5 years	88.8 mm (3.5 in)
10 years	106.4 mm (4.2 in)
25 years	131.3 mm (5.2 in)
50 years	151.9 mm (6.0 in)
100 years	174.4 mm (6.9 in)	Longer than the 87 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, 87 years of values from 1923 to 2011.

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: 188.5 mm (7.4 in) in 1981; 182.4 mm (7.2 in) in 1997; 129.5 mm (5.1 in) in 1923.

Download the Data

Data for Apatzingan (Smn) standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Apatzingan (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 2026-10-16 (16 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).