Atlatlahuacan Weather Records (MXN00017001)

Record envelope, standing records and threshold days for Atlatlahuacan (MXN00017001), Mexico, with 89 years of record.

Key Facts for Atlatlahuacan

Atlatlahuacan (MXN00017001) is a weather station in Mexico at 18.93 latitude and -98.92 longitude, 1,600 m (5,249 ft) above sea level.
The station reports from 1924 to 2012, 89 years of record.
1,464 records set at Atlatlahuacan still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Atlatlahuacan tied a daily record high minimum temperature of 15.6 C (60.1 F) on 30 September 2012.

About the Station

Location: Mexico, 18.93 latitude, -98.92 longitude.
Elevation: 1,600 m (5,249 ft).
Period of record: 1924 to 2012, 89 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 Atlatlahuacan. 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 Atlatlahuacan, 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)	1.1 C (34.0 F)	n/a	n/a
Feb	35.6 C (96.1 F)	0.0 C (32.0 F)	n/a	n/a
Mar	36.7 C (98.1 F)	3.9 C (39.0 F)	n/a	n/a
Apr	37.8 C (100.0 F)	5.6 C (42.1 F)	n/a	n/a
May	36.7 C (98.1 F)	6.7 C (44.1 F)	n/a	n/a
Jun	35.6 C (96.1 F)	6.7 C (44.1 F)	n/a	n/a
Jul	33.9 C (93.0 F)	5.6 C (42.1 F)	n/a	n/a
Aug	33.9 C (93.0 F)	6.7 C (44.1 F)	n/a	n/a
Sep	33.9 C (93.0 F)	5.6 C (42.1 F)	n/a	n/a
Oct	35.6 C (96.1 F)	3.9 C (39.0 F)	n/a	n/a
Nov	32.8 C (91.0 F)	1.7 C (35.1 F)	n/a	n/a
Dec	33.9 C (93.0 F)	0.6 C (33.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Atlatlahuacan still stand. 2004 holds the most, with 103.

Standing records at Atlatlahuacan by the year they were set
Year set	Standing records
1924	20
1925	39
1926	42
1927	18
1928	22
1929	11
1930	20
1931	21
1932	10
1933	15
1934	14
1935	23
1936	16
1937	15
1938	13
1939	12
1940	13
1941	18
1942	11
1943	8
1944	9
1945	23
1946	55
1947	13
1948	12
1949	3
1950	31
1951	7
1952	10
1953	6
1954	3
1955	6
1956	10
1957	7
1958	49
1959	7
1960	4
1961	18
1962	28
1963	4
1964	2
1965	2
1966	1
1967	1
1970	1
1971	2
1972	18
1973	29
1974	1
1975	2
1976	5
1977	52
1978	7
1979	8
1980	9
1981	6
1982	10
1983	14
1984	2
1985	3
1987	20
1988	31
1989	28
1990	17
1991	12
1992	17
1993	21
1994	8
1995	13
1996	42
1997	9
1998	26
1999	2
2000	2
2001	13
2002	26
2003	26
2004	103
2005	9
2006	31
2007	25
2008	20
2009	25
2010	56
2011	18
2012	23

All-Time Record Progression

5 new records

5 all-time records were set at Atlatlahuacan between 1 September 1967 and 30 June 2011. Each dot is a new record.

When Atlatlahuacan set new all-time records
Date	Kind	Detail
1967-09-01	Record daily precipitation	Record daily precipitation 112.8 mm (4.4 in)
2004-04-13	Record high maximum temperature	Record high maximum temperature 37.8 C (100.0 F)
2005-06-29	Record daily precipitation	Record daily precipitation 121.9 mm (4.8 in)
2010-08-24	Record daily precipitation	Record daily precipitation 136.9 mm (5.4 in)
2011-06-30	Record daily precipitation	Record daily precipitation 186.4 mm (7.3 in)

Wettest Day of Each Month

Jun: 186.4 mm (7.3 in)

The wettest day on record for each calendar month at Atlatlahuacan. The most was 186.4 mm (7.3 in) on 30 June 2011.

Record daily precipitation for each month at Atlatlahuacan
Month	Record daily precipitation (mm)	Date
Jan	31.8 mm (1.3 in)	14 January 2002
Feb	60.2 mm (2.4 in)	4 February 2010
Mar	31.0 mm (1.2 in)	14 March 1940
Apr	47.0 mm (1.9 in)	28 April 2004
May	45.0 mm (1.8 in)	31 May 1975
Jun	186.4 mm (7.3 in)	30 June 2011
Jul	94.5 mm (3.7 in)	9 July 1933
Aug	136.9 mm (5.4 in)	24 August 2010
Sep	112.8 mm (4.4 in)	1 September 1967
Oct	82.3 mm (3.2 in)	20 October 1984
Nov	53.1 mm (2.1 in)	1 November 2009
Dec	47.8 mm (1.9 in)	3 December 1968

Period of Record Coverage

1924 to 2012

87 years of record at Atlatlahuacan, 1924 to 2012. 6 years have data for under 90 percent of days and are left out of rankings: 1924, 1925, 1977, 1985, 2008, 2012.

Days with data per year at Atlatlahuacan
Year	Days with data	Share of year	Complete
1924	86	23%	No
1925	264	72%	No
1926	353	97%	Yes
1927	353	97%	Yes
1928	354	97%	Yes
1929	353	97%	Yes
1930	353	97%	Yes
1931	353	97%	Yes
1932	354	97%	Yes
1933	354	97%	Yes
1934	361	99%	Yes
1935	365	100%	Yes
1936	366	100%	Yes
1937	365	100%	Yes
1938	364	100%	Yes
1939	365	100%	Yes
1940	364	99%	Yes
1941	365	100%	Yes
1942	364	100%	Yes
1943	365	100%	Yes
1944	366	100%	Yes
1945	364	100%	Yes
1946	364	100%	Yes
1947	364	100%	Yes
1948	365	100%	Yes
1949	365	100%	Yes
1950	365	100%	Yes
1951	365	100%	Yes
1952	336	92%	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	363	99%	Yes
1963	364	100%	Yes
1964	366	100%	Yes
1965	365	100%	Yes
1966	332	91%	Yes
1967	333	91%	Yes
1968	336	92%	Yes
1970	364	100%	Yes
1971	363	99%	Yes
1972	366	100%	Yes
1973	365	100%	Yes
1974	364	100%	Yes
1975	364	100%	Yes
1976	363	99%	Yes
1977	328	90%	No
1978	365	100%	Yes
1979	363	99%	Yes
1980	366	100%	Yes
1981	364	100%	Yes
1982	357	98%	Yes
1983	364	100%	Yes
1984	364	99%	Yes
1985	271	74%	No
1987	356	98%	Yes
1988	364	99%	Yes
1989	360	99%	Yes
1990	362	99%	Yes
1991	365	100%	Yes
1992	366	100%	Yes
1993	365	100%	Yes
1994	365	100%	Yes
1995	365	100%	Yes
1996	366	100%	Yes
1997	365	100%	Yes
1998	365	100%	Yes
1999	365	100%	Yes
2000	366	100%	Yes
2001	365	100%	Yes
2002	363	99%	Yes
2003	365	100%	Yes
2004	363	99%	Yes
2005	365	100%	Yes
2006	364	100%	Yes
2007	365	100%	Yes
2008	305	83%	No
2009	365	100%	Yes
2010	365	100%	Yes
2011	365	100%	Yes
2012	274	75%	No

Latest Records

Latest records at Atlatlahuacan
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
30 September 2012	Atlatlahuacan, MX	daily high min (Tie)	15.6 C (60.1 F)	tie	66 years	6 of 100 (Routine)
28 September 2012	Atlatlahuacan, MX	daily low max (Tie)	20.0 C (68.0 F)	tie	84 years	8 of 100 (Routine)
25 September 2012	Atlatlahuacan, MX	daily high min (Tie)	15.6 C (60.1 F)	tie	2 years	2 of 100 (Routine)
24 September 2012	Atlatlahuacan, MX	daily high min	16.7 C (62.1 F)	1.1 C (2.0 F)	72 years	34 of 100 (Routine)
21 September 2012	Atlatlahuacan, MX	daily low max (Tie)	22.8 C (73.0 F)	tie	87 years	8 of 100 (Routine)
19 September 2012	Atlatlahuacan, MX	daily high min (Tie)	15.6 C (60.1 F)	tie	3 years	2 of 100 (Routine)
12 September 2012	Atlatlahuacan, MX	daily high min (Tie)	15.6 C (60.1 F)	tie	3 years	2 of 100 (Routine)
30 August 2012	Atlatlahuacan, MX	daily high min (Tie)	15.6 C (60.1 F)	tie	39 years	4 of 100 (Routine)
26 August 2012	Atlatlahuacan, MX	daily low max	20.0 C (68.0 F)	2.8 C (5.0 F)	78 years	42 of 100 (Notable)
24 August 2012	Atlatlahuacan, MX	monthly low max	18.9 C (66.0 F)	1.1 C (2.0 F)	79 years	45 of 100 (Notable)
23 August 2012	Atlatlahuacan, MX	daily low max (Tie)	20.6 C (69.1 F)	tie	5 years	2 of 100 (Routine)
22 August 2012	Atlatlahuacan, MX	monthly low max (Tie)	20.0 C (68.0 F)	tie	79 years	10 of 100 (Routine)
19 August 2012	Atlatlahuacan, MX	monthly low max (Tie)	20.0 C (68.0 F)	tie	79 years	10 of 100 (Routine)
19 August 2012	Atlatlahuacan, MX	daily high min (Tie)	15.6 C (60.1 F)	tie	86 years	8 of 100 (Routine)
18 August 2012	Atlatlahuacan, MX	daily low max (Tie)	21.7 C (71.1 F)	tie	79 years	7 of 100 (Routine)
18 August 2012	Atlatlahuacan, MX	daily high min (Tie)	15.6 C (60.1 F)	tie	16 years	3 of 100 (Routine)
17 August 2012	Atlatlahuacan, MX	daily low max (Tie)	22.8 C (73.0 F)	tie	79 years	7 of 100 (Routine)
15 August 2012	Atlatlahuacan, MX	daily low min (Tie)	7.8 C (46.0 F)	tie	56 years	6 of 100 (Routine)
13 August 2012	Atlatlahuacan, MX	monthly low max (Tie)	20.0 C (68.0 F)	tie	79 years	10 of 100 (Routine)
12 August 2012	Atlatlahuacan, MX	daily low max	21.7 C (71.1 F)	1.1 C (2.0 F)	81 years	36 of 100 (Notable)

Climate Trend

76 complete years, 1926 to 2011

One stripe for each of 76 complete years at Atlatlahuacan, 1926 to 2011. Blue stripes are years cooler than the station's own mean of 19.8 C (67.7 F); red stripes are warmer. The coolest year was 1926, at 18.7 C (65.7 F), and the warmest was 1946, at 21.8 C (71.3 F). The strongest colour marks a difference of 2.0 C (3.6 F).

Annual mean temperature at Atlatlahuacan as warming stripes, 1926 to 2011
Year	Annual mean temperature	Difference from the station mean
1926	18.7 C	-1.10 C
1927	19.3 C	-0.54 C
1928	19.4 C	-0.42 C
1929	19.5 C	-0.29 C
1930	19.4 C	-0.47 C
1931	19.5 C	-0.36 C
1932	19.8 C	-0.06 C
1933	19.7 C	-0.11 C
1934	19.2 C	-0.60 C
1935	19.1 C	-0.70 C
1936	19.7 C	-0.09 C
1937	19.5 C	-0.38 C
1938	19.3 C	-0.55 C
1939	19.0 C	-0.82 C
1940	19.5 C	-0.29 C
1941	19.8 C	-0.04 C
1942	19.8 C	-0.01 C
1943	20.2 C	+0.41 C
1944	20.6 C	+0.75 C
1945	20.9 C	+1.06 C
1946	21.8 C	+2.00 C
1947	20.2 C	+0.37 C
1948	19.7 C	-0.10 C
1949	20.2 C	+0.33 C
1950	19.2 C	-0.63 C
1951	19.6 C	-0.28 C
1953	19.6 C	-0.28 C
1954	19.8 C	-0.03 C
1955	19.6 C	-0.26 C
1956	19.3 C	-0.50 C
1957	19.3 C	-0.53 C
1958	18.8 C	-1.07 C
1959	19.2 C	-0.65 C
1960	19.1 C	-0.70 C
1961	18.9 C	-0.97 C
1962	19.2 C	-0.68 C
1963	19.5 C	-0.34 C
1964	19.8 C	+0.01 C
1965	20.0 C	+0.18 C
1970	19.4 C	-0.43 C
1971	19.7 C	-0.16 C
1972	20.2 C	+0.41 C
1973	21.0 C	+1.20 C
1974	20.0 C	+0.15 C
1975	19.8 C	-0.06 C
1976	19.1 C	-0.78 C
1978	19.0 C	-0.85 C
1979	20.7 C	+0.84 C
1980	20.5 C	+0.71 C
1981	20.7 C	+0.83 C
1982	21.1 C	+1.31 C
1983	20.6 C	+0.73 C
1984	20.9 C	+1.08 C
1987	21.1 C	+1.23 C
1988	19.8 C	+0.01 C
1989	19.8 C	-0.08 C
1990	19.8 C	+0.01 C
1991	19.7 C	-0.17 C
1992	19.7 C	-0.15 C
1993	20.1 C	+0.31 C
1994	19.9 C	+0.04 C
1996	20.8 C	+0.98 C
1997	20.3 C	+0.48 C
1998	20.7 C	+0.91 C
1999	20.4 C	+0.52 C
2000	19.5 C	-0.32 C
2001	19.9 C	+0.02 C
2002	19.4 C	-0.39 C
2003	19.3 C	-0.58 C
2004	21.1 C	+1.24 C
2005	20.3 C	+0.46 C
2006	20.4 C	+0.53 C
2007	19.7 C	-0.16 C
2009	19.5 C	-0.29 C
2010	19.2 C	-0.67 C
2011	19.8 C	-0.08 C

The annual mean temperature here has risen by 0.07 C (0.02 to 0.13) per decade over 1926 to 2011. In Fahrenheit: 0.13 F (0.03 to 0.23) per decade. The slope is a straight line fitted to 76 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Atlatlahuacan
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.07 C (0.02 to 0.13) per decade	0.13 F (0.03 to 0.23) per decade	1926 to 2011	76	Rise
Mean daily maximum	0.16 C (0.04 to 0.28) per decade	0.3 F (0.1 to 0.5) per decade	1926 to 2011	76	Rise
Mean daily minimum	-0.01 C (-0.13 to 0.11) per decade	-0.02 F (-0.24 to 0.20) per decade	1926 to 2011	76	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

1924 to 2012

Yearly extremes at Atlatlahuacan: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	37.8 C (100.0 F)	2004	32.8 C (91.0 F)	87
Coldest night (TNn)	0.0 C (32.0 F)	1926	6.7 C (44.1 F)	87
Wettest day (Rx1day)	186.4 mm (7.3 in)	2011	56.9 mm (2.2 in)	87
Wettest five days (Rx5day)	416.3 mm (16.4 in)	1968	116.4 mm (4.6 in)	87
Longest dry spell (CDD)	168 days	1993	79 days	87

Hottest day (TXx)

The hottest day of the year at Atlatlahuacan, 1924 to 2012. The record is 37.8 C (100.0 F) in 2004, marked on the chart; the median year is 32.8 C (91.0 F).

Hottest day (TXx) at Atlatlahuacan by year
Year	Hottest day (TXx)
1924	28.9 C (84.0 F)
1925	33.9 C (93.0 F)
1926	33.3 C (91.9 F)
1927	33.9 C (93.0 F)
1928	33.9 C (93.0 F)
1929	33.9 C (93.0 F)
1930	35.0 C (95.0 F)
1931	32.8 C (91.0 F)
1932	33.9 C (93.0 F)
1933	35.0 C (95.0 F)
1934	31.7 C (89.1 F)
1935	34.4 C (93.9 F)
1936	35.0 C (95.0 F)
1937	34.4 C (93.9 F)
1938	32.8 C (91.0 F)
1939	31.7 C (89.1 F)
1940	32.8 C (91.0 F)
1941	33.9 C (93.0 F)
1942	35.0 C (95.0 F)
1943	33.9 C (93.0 F)
1944	35.6 C (96.1 F)
1945	35.0 C (95.0 F)
1946	36.1 C (97.0 F)
1947	35.6 C (96.1 F)
1948	31.1 C (88.0 F)
1949	31.1 C (88.0 F)
1950	37.2 C (99.0 F)
1951	31.7 C (89.1 F)
1952	31.1 C (88.0 F)
1953	31.1 C (88.0 F)
1954	31.7 C (89.1 F)
1955	31.7 C (89.1 F)
1956	31.1 C (88.0 F)
1957	31.1 C (88.0 F)
1958	31.7 C (89.1 F)
1959	31.1 C (88.0 F)
1960	31.1 C (88.0 F)
1961	35.6 C (96.1 F)
1962	34.4 C (93.9 F)
1963	31.7 C (89.1 F)
1964	32.8 C (91.0 F)
1965	31.7 C (89.1 F)
1966	32.2 C (90.0 F)
1967	33.3 C (91.9 F)
1968	31.1 C (88.0 F)
1970	31.7 C (89.1 F)
1971	31.7 C (89.1 F)
1972	32.2 C (90.0 F)
1973	35.6 C (96.1 F)
1974	32.8 C (91.0 F)
1975	32.8 C (91.0 F)
1976	33.9 C (93.0 F)
1977	30.0 C (86.0 F)
1978	31.7 C (89.1 F)
1979	35.6 C (96.1 F)
1980	35.6 C (96.1 F)
1981	31.1 C (88.0 F)
1982	32.2 C (90.0 F)
1983	32.8 C (91.0 F)
1984	32.8 C (91.0 F)
1985	31.7 C (89.1 F)
1987	32.8 C (91.0 F)
1988	32.8 C (91.0 F)
1989	35.0 C (95.0 F)
1990	36.7 C (98.1 F)
1991	32.8 C (91.0 F)
1992	33.9 C (93.0 F)
1993	33.9 C (93.0 F)
1994	32.8 C (91.0 F)
1995	32.8 C (91.0 F)
1996	35.0 C (95.0 F)
1997	33.9 C (93.0 F)
1998	35.6 C (96.1 F)
1999	33.9 C (93.0 F)
2000	33.9 C (93.0 F)
2001	32.8 C (91.0 F)
2002	36.7 C (98.1 F)
2003	36.7 C (98.1 F)
2004	37.8 C (100.0 F)
2005	32.8 C (91.0 F)
2006	33.9 C (93.0 F)
2007	32.8 C (91.0 F)
2008	32.8 C (91.0 F)
2009	32.8 C (91.0 F)
2010	33.9 C (93.0 F)
2011	32.8 C (91.0 F)
2012	31.7 C (89.1 F)

Coldest night (TNn)

The coldest night of the year at Atlatlahuacan, 1924 to 2012. The record is 0.0 C (32.0 F) in 1926, marked on the chart; the median year is 6.7 C (44.1 F).

Coldest night (TNn) at Atlatlahuacan by year
Year	Coldest night (TNn)
1924	3.9 C (39.0 F)
1925	3.9 C (39.0 F)
1926	0.0 C (32.0 F)
1927	3.9 C (39.0 F)
1928	5.6 C (42.1 F)
1929	6.1 C (43.0 F)
1930	5.6 C (42.1 F)
1931	6.7 C (44.1 F)
1932	5.0 C (41.0 F)
1933	5.0 C (41.0 F)
1934	3.9 C (39.0 F)
1935	5.0 C (41.0 F)
1936	7.2 C (45.0 F)
1937	7.8 C (46.0 F)
1938	1.7 C (35.1 F)
1939	6.7 C (44.1 F)
1940	6.1 C (43.0 F)
1941	1.7 C (35.1 F)
1942	5.0 C (41.0 F)
1943	3.9 C (39.0 F)
1944	6.7 C (44.1 F)
1945	5.6 C (42.1 F)
1946	7.8 C (46.0 F)
1947	7.8 C (46.0 F)
1948	5.6 C (42.1 F)
1949	6.7 C (44.1 F)
1950	3.9 C (39.0 F)
1951	5.6 C (42.1 F)
1952	5.6 C (42.1 F)
1953	6.7 C (44.1 F)
1954	6.7 C (44.1 F)
1955	6.7 C (44.1 F)
1956	6.7 C (44.1 F)
1957	7.2 C (45.0 F)
1958	6.7 C (44.1 F)
1959	6.7 C (44.1 F)
1960	6.7 C (44.1 F)
1961	6.7 C (44.1 F)
1962	6.7 C (44.1 F)
1963	6.7 C (44.1 F)
1964	6.7 C (44.1 F)
1965	6.7 C (44.1 F)
1966	5.0 C (41.0 F)
1967	7.8 C (46.0 F)
1968	6.7 C (44.1 F)
1970	6.7 C (44.1 F)
1971	6.7 C (44.1 F)
1972	1.1 C (34.0 F)
1973	7.2 C (45.0 F)
1974	8.9 C (48.0 F)
1975	7.8 C (46.0 F)
1976	6.7 C (44.1 F)
1977	5.6 C (42.1 F)
1978	5.6 C (42.1 F)
1979	6.7 C (44.1 F)
1980	6.7 C (44.1 F)
1981	6.7 C (44.1 F)
1982	7.8 C (46.0 F)
1983	7.8 C (46.0 F)
1984	7.8 C (46.0 F)
1985	3.9 C (39.0 F)
1987	6.7 C (44.1 F)
1988	5.6 C (42.1 F)
1989	6.7 C (44.1 F)
1990	0.6 C (33.1 F)
1991	6.7 C (44.1 F)
1992	6.7 C (44.1 F)
1993	6.7 C (44.1 F)
1994	6.7 C (44.1 F)
1995	7.2 C (45.0 F)
1996	5.6 C (42.1 F)
1997	7.2 C (45.0 F)
1998	6.7 C (44.1 F)
1999	7.8 C (46.0 F)
2000	7.8 C (46.0 F)
2001	5.0 C (41.0 F)
2002	1.7 C (35.1 F)
2003	2.8 C (37.0 F)
2004	10.0 C (50.0 F)
2005	8.9 C (48.0 F)
2006	6.7 C (44.1 F)
2007	6.7 C (44.1 F)
2008	7.8 C (46.0 F)
2009	6.7 C (44.1 F)
2010	5.6 C (42.1 F)
2011	7.8 C (46.0 F)
2012	6.7 C (44.1 F)

Wettest day (Rx1day)

The wettest day of the year at Atlatlahuacan, 1924 to 2012. The record is 186.4 mm (7.3 in) in 2011, marked on the chart; the median year is 56.9 mm (2.2 in).

Wettest day (Rx1day) at Atlatlahuacan by year
Year	Wettest day (Rx1day)
1924	13.0 mm (0.5 in)
1925	77.0 mm (3.0 in)
1926	68.3 mm (2.7 in)
1927	64.8 mm (2.6 in)
1928	67.3 mm (2.6 in)
1929	87.4 mm (3.4 in)
1930	49.8 mm (2.0 in)
1931	52.6 mm (2.1 in)
1932	41.9 mm (1.6 in)
1933	94.5 mm (3.7 in)
1934	69.9 mm (2.8 in)
1935	62.5 mm (2.5 in)
1936	68.3 mm (2.7 in)
1937	55.9 mm (2.2 in)
1938	48.8 mm (1.9 in)
1939	54.4 mm (2.1 in)
1940	79.8 mm (3.1 in)
1941	85.9 mm (3.4 in)
1942	57.9 mm (2.3 in)
1943	39.9 mm (1.6 in)
1944	64.8 mm (2.6 in)
1945	32.8 mm (1.3 in)
1946	53.8 mm (2.1 in)
1947	64.8 mm (2.6 in)
1948	59.9 mm (2.4 in)
1949	79.8 mm (3.1 in)
1950	47.8 mm (1.9 in)
1951	46.0 mm (1.8 in)
1952	57.9 mm (2.3 in)
1953	59.9 mm (2.4 in)
1954	45.0 mm (1.8 in)
1955	45.0 mm (1.8 in)
1956	52.8 mm (2.1 in)
1957	52.8 mm (2.1 in)
1958	62.0 mm (2.4 in)
1959	39.9 mm (1.6 in)
1960	53.3 mm (2.1 in)
1961	55.9 mm (2.2 in)
1962	37.8 mm (1.5 in)
1963	66.3 mm (2.6 in)
1964	53.8 mm (2.1 in)
1965	64.8 mm (2.6 in)
1966	61.0 mm (2.4 in)
1967	112.8 mm (4.4 in)
1968	98.8 mm (3.9 in)
1970	41.9 mm (1.6 in)
1971	58.9 mm (2.3 in)
1972	41.9 mm (1.6 in)
1973	59.9 mm (2.4 in)
1974	67.8 mm (2.7 in)
1975	45.0 mm (1.8 in)
1976	67.8 mm (2.7 in)
1977	30.5 mm (1.2 in)
1978	41.9 mm (1.6 in)
1979	59.9 mm (2.4 in)
1980	50.3 mm (2.0 in)
1981	47.8 mm (1.9 in)
1982	30.0 mm (1.2 in)
1983	56.9 mm (2.2 in)
1984	82.3 mm (3.2 in)
1985	45.0 mm (1.8 in)
1987	74.9 mm (2.9 in)
1988	64.8 mm (2.6 in)
1989	47.8 mm (1.9 in)
1990	42.9 mm (1.7 in)
1991	59.9 mm (2.4 in)
1992	39.9 mm (1.6 in)
1993	43.9 mm (1.7 in)
1994	19.8 mm (0.8 in)
1995	30.0 mm (1.2 in)
1996	41.9 mm (1.6 in)
1997	56.6 mm (2.2 in)
1998	59.9 mm (2.4 in)
1999	54.4 mm (2.1 in)
2000	68.8 mm (2.7 in)
2001	79.8 mm (3.1 in)
2002	52.1 mm (2.1 in)
2003	46.5 mm (1.8 in)
2004	49.8 mm (2.0 in)
2005	121.9 mm (4.8 in)
2006	64.8 mm (2.6 in)
2007	71.6 mm (2.8 in)
2008	57.4 mm (2.3 in)
2009	70.1 mm (2.8 in)
2010	136.9 mm (5.4 in)
2011	186.4 mm (7.3 in)
2012	49.3 mm (1.9 in)

Wettest five days (Rx5day)

The wettest five days of the year at Atlatlahuacan, 1924 to 2012. The record is 416.3 mm (16.4 in) in 1968, marked on the chart; the median year is 116.4 mm (4.6 in).

Wettest five days (Rx5day) at Atlatlahuacan by year
Year	Wettest five days (Rx5day)
1924	13.0 mm (0.5 in)
1925	116.4 mm (4.6 in)
1926	100.3 mm (3.9 in)
1927	175.3 mm (6.9 in)
1928	129.9 mm (5.1 in)
1929	127.6 mm (5.0 in)
1930	94.0 mm (3.7 in)
1931	160.4 mm (6.3 in)
1932	123.4 mm (4.9 in)
1933	131.7 mm (5.2 in)
1934	206.9 mm (8.1 in)
1935	105.2 mm (4.1 in)
1936	112.5 mm (4.4 in)
1937	191.3 mm (7.5 in)
1938	93.7 mm (3.7 in)
1939	97.8 mm (3.9 in)
1940	151.2 mm (6.0 in)
1941	151.7 mm (6.0 in)
1942	134.4 mm (5.3 in)
1943	99.4 mm (3.9 in)
1944	106.2 mm (4.2 in)
1945	150.2 mm (5.9 in)
1946	87.8 mm (3.5 in)
1947	95.1 mm (3.7 in)
1948	89.2 mm (3.5 in)
1949	99.8 mm (3.9 in)
1950	76.3 mm (3.0 in)
1951	155.2 mm (6.1 in)
1952	122.5 mm (4.8 in)
1953	85.6 mm (3.4 in)
1954	123.0 mm (4.8 in)
1955	152.2 mm (6.0 in)
1956	168.2 mm (6.6 in)
1957	99.2 mm (3.9 in)
1958	133.9 mm (5.3 in)
1959	83.6 mm (3.3 in)
1960	146.0 mm (5.7 in)
1961	137.4 mm (5.4 in)
1962	77.8 mm (3.1 in)
1963	107.4 mm (4.2 in)
1964	125.3 mm (4.9 in)
1965	123.2 mm (4.9 in)
1966	145.3 mm (5.7 in)
1967	172.8 mm (6.8 in)
1968	416.3 mm (16.4 in)
1970	106.2 mm (4.2 in)
1971	88.6 mm (3.5 in)
1972	94.3 mm (3.7 in)
1973	123.4 mm (4.9 in)
1974	114.6 mm (4.5 in)
1975	113.6 mm (4.5 in)
1976	93.4 mm (3.7 in)
1977	52.6 mm (2.1 in)
1978	92.7 mm (3.6 in)
1979	125.4 mm (4.9 in)
1980	112.7 mm (4.4 in)
1981	105.6 mm (4.2 in)
1982	69.1 mm (2.7 in)
1983	94.7 mm (3.7 in)
1984	127.7 mm (5.0 in)
1985	104.3 mm (4.1 in)
1987	109.0 mm (4.3 in)
1988	160.6 mm (6.3 in)
1989	124.2 mm (4.9 in)
1990	132.6 mm (5.2 in)
1991	161.5 mm (6.4 in)
1992	82.4 mm (3.2 in)
1993	89.4 mm (3.5 in)
1994	72.4 mm (2.9 in)
1995	104.6 mm (4.1 in)
1996	95.7 mm (3.8 in)
1997	99.6 mm (3.9 in)
1998	174.5 mm (6.9 in)
1999	92.3 mm (3.6 in)
2000	114.3 mm (4.5 in)
2001	163.5 mm (6.4 in)
2002	162.1 mm (6.4 in)
2003	90.9 mm (3.6 in)
2004	105.8 mm (4.2 in)
2005	145.5 mm (5.7 in)
2006	152.5 mm (6.0 in)
2007	127.2 mm (5.0 in)
2008	149.7 mm (5.9 in)
2009	121.4 mm (4.8 in)
2010	222.0 mm (8.7 in)
2011	236.9 mm (9.3 in)
2012	134.8 mm (5.3 in)

Longest dry spell (CDD)

The longest dry spell of the year at Atlatlahuacan, 1924 to 2012. The record is 168 days in 1993, marked on the chart; the median year is 79 days.

Longest dry spell (CDD) at Atlatlahuacan by year
Year	Longest dry spell (CDD)
1924	87 days
1925	23 days
1926	108 days
1927	45 days
1928	68 days
1929	105 days
1930	108 days
1931	105 days
1932	67 days
1933	142 days
1934	63 days
1935	56 days
1936	83 days
1937	41 days
1938	78 days
1939	69 days
1940	73 days
1941	43 days
1942	50 days
1943	79 days
1944	148 days
1945	60 days
1946	30 days
1947	72 days
1948	68 days
1949	77 days
1950	82 days
1951	77 days
1952	31 days
1953	119 days
1954	63 days
1955	31 days
1956	60 days
1957	46 days
1958	60 days
1959	60 days
1960	107 days
1961	139 days
1962	121 days
1963	79 days
1964	128 days
1965	53 days
1966	65 days
1967	51 days
1968	50 days
1970	137 days
1971	58 days
1972	71 days
1973	57 days
1974	75 days
1975	107 days
1976	77 days
1977	96 days
1978	149 days
1979	142 days
1980	117 days
1981	67 days
1982	134 days
1983	102 days
1984	156 days
1985	123 days
1987	151 days
1988	107 days
1989	159 days
1990	120 days
1991	146 days
1992	117 days
1993	168 days
1994	139 days
1995	121 days
1996	128 days
1997	123 days
1998	154 days
1999	106 days
2000	142 days
2001	65 days
2002	122 days
2003	88 days
2004	58 days
2005	80 days
2006	121 days
2007	40 days
2008	68 days
2009	48 days
2010	58 days
2011	104 days
2012	45 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

82 years, 1926 to 2011

A day with at least 55.7 mm (2.2 in) of rain is expected about once in 2 years. A day with at least 142.0 mm (5.6 in) of rain is expected about once in 100 years.

Rainfall return levels at Atlatlahuacan: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	55.7 mm (2.2 in)
5 years	74.4 mm (2.9 in)
10 years	88.3 mm (3.5 in)
25 years	108.0 mm (4.3 in)
50 years	124.3 mm (4.9 in)
100 years	142.0 mm (5.6 in)	Longer than the 82 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, 82 years of values from 1926 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: 186.4 mm (7.3 in) in 2011; 136.9 mm (5.4 in) in 2010; 121.9 mm (4.8 in) in 2005.

Download the Data

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