Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Atoyac. 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 Atoyac, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
36.7 C (98.1 F)
0.0 C (32.0 F)
n/a
n/a
Feb
35.0 C (95.0 F)
0.0 C (32.0 F)
n/a
n/a
Mar
38.9 C (102.0 F)
3.9 C (39.0 F)
n/a
n/a
Apr
39.4 C (102.9 F)
5.0 C (41.0 F)
n/a
n/a
May
40.0 C (104.0 F)
6.7 C (44.1 F)
n/a
n/a
Jun
40.0 C (104.0 F)
10.0 C (50.0 F)
n/a
n/a
Jul
37.8 C (100.0 F)
7.8 C (46.0 F)
n/a
n/a
Aug
35.0 C (95.0 F)
10.0 C (50.0 F)
n/a
n/a
Sep
34.4 C (93.9 F)
7.2 C (45.0 F)
n/a
n/a
Oct
35.6 C (96.1 F)
5.0 C (41.0 F)
n/a
n/a
Nov
36.7 C (98.1 F)
2.2 C (36.0 F)
n/a
n/a
Dec
34.4 C (93.9 F)
0.6 C (33.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Atoyac still stand. 1946 holds the most, with 94.
Standing records at Atoyac by the year they were set
Year set
Standing records
1943
12
1944
70
1945
64
1946
94
1947
78
1948
30
1949
15
1950
11
1951
17
1952
30
1953
16
1954
15
1955
16
1956
8
1957
18
1958
25
1959
14
1960
15
1961
13
1962
4
1963
7
1964
5
1965
16
1966
22
1967
16
1968
42
1969
43
1970
16
1971
3
1972
11
1973
5
1974
8
1975
8
1976
18
1977
10
1978
4
1979
14
1980
1
1981
7
1982
7
1983
28
1984
1
1985
17
1986
18
1987
5
1988
32
1989
39
1990
19
1991
28
1992
38
1993
24
1994
29
1995
33
1996
15
1997
47
1998
18
1999
23
2000
30
2001
13
2002
18
2003
13
2004
8
2005
8
2006
19
2007
12
2008
13
2009
17
2010
19
2011
26
2012
26
All-Time Record Progression
5 new records
5 all-time records were set at Atoyac between 19 May 1983 and 17 January 1992. Each dot is a new record.
When Atoyac set new all-time records
Date
Kind
Detail
1983-05-19
Record high maximum temperature
Record high maximum temperature 38.9 C (102.0 F)
1989-05-18
Record high maximum temperature
Record high maximum temperature 39.4 C (102.9 F)
1989-06-06
Record high maximum temperature
Record high maximum temperature 40.0 C (104.0 F)
1992-01-16
Record low maximum temperature
Record low maximum temperature 14.4 C (57.9 F)
1992-01-17
Record low maximum temperature
Record low maximum temperature 13.9 C (57.0 F)
Wettest Day of Each Month
Jul: 83.1 mm (3.3 in)
The wettest day on record for each calendar month at Atoyac. The most was 83.1 mm (3.3 in) on 27 July 1972.
Record daily precipitation for each month at Atoyac
Month
Record daily precipitation (mm)
Date
Jan
70.9 mm (2.8 in)
16 January 1992
Feb
74.4 mm (2.9 in)
3 February 2010
Mar
57.2 mm (2.3 in)
3 March 1968
Apr
29.0 mm (1.1 in)
16 April 1959
May
53.8 mm (2.1 in)
31 May 1950
Jun
76.2 mm (3.0 in)
19 June 2007
Jul
83.1 mm (3.3 in)
27 July 1972
Aug
69.3 mm (2.7 in)
1 August 1993
Sep
46.5 mm (1.8 in)
10 September 1949
Oct
68.3 mm (2.7 in)
9 October 1992
Nov
54.4 mm (2.1 in)
26 November 1982
Dec
43.9 mm (1.7 in)
12 December 1963
Period of Record Coverage
1943 to 2012
Complete yearUnder 90 percent of days
70 years of record at Atoyac, 1943 to 2012. 14 years have data for under 90 percent of days and are left out of rankings: 1943, 1944, 1945, 1946, 1947, 1989, 1990, 1993 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 47 complete years at Atoyac, 1951 to 2011. Blue stripes are years cooler than the station's own mean of 20.8 C (69.4 F); red stripes are warmer. The coolest year was 1968, at 19.9 C (67.8 F), and the warmest was 1994, at 22.3 C (72.1 F). The strongest colour marks a difference of 1.6 C (2.9 F).
Annual mean temperature at Atoyac as warming stripes, 1951 to 2011
Year
Annual mean temperature
Difference from the station mean
1951
20.9 C
+0.16 C
1952
20.6 C
-0.13 C
1953
20.9 C
+0.10 C
1954
20.8 C
+0.05 C
1955
20.4 C
-0.41 C
1956
20.6 C
-0.21 C
1957
20.9 C
+0.17 C
1958
20.5 C
-0.31 C
1959
20.5 C
-0.26 C
1960
20.8 C
+0.02 C
1961
20.5 C
-0.23 C
1962
20.7 C
-0.12 C
1963
20.8 C
+0.01 C
1964
20.7 C
-0.07 C
1965
20.5 C
-0.31 C
1966
20.1 C
-0.69 C
1967
20.3 C
-0.46 C
1968
19.9 C
-0.90 C
1969
20.6 C
-0.19 C
1970
20.5 C
-0.27 C
1971
20.7 C
-0.08 C
1972
21.1 C
+0.32 C
1973
20.6 C
-0.20 C
1974
20.5 C
-0.30 C
1975
20.4 C
-0.39 C
1976
20.1 C
-0.67 C
1977
20.1 C
-0.68 C
1978
20.2 C
-0.54 C
1979
20.4 C
-0.36 C
1980
20.7 C
-0.06 C
1981
20.2 C
-0.58 C
1982
21.1 C
+0.36 C
1983
20.0 C
-0.81 C
1984
20.5 C
-0.31 C
1985
20.8 C
+0.04 C
1986
21.5 C
+0.71 C
1987
20.8 C
-0.02 C
1988
21.5 C
+0.76 C
1992
20.9 C
+0.14 C
1994
22.3 C
+1.52 C
2005
21.5 C
+0.74 C
2006
21.6 C
+0.81 C
2007
21.5 C
+0.72 C
2008
21.1 C
+0.37 C
2009
21.9 C
+1.09 C
2010
21.1 C
+0.28 C
2011
21.7 C
+0.96 C
The annual mean temperature here has risen by 0.2 C (0.1 to 0.2) per decade over 1951 to 2011. In Fahrenheit: 0.3 F (0.2 to 0.4) per decade. The slope is a straight line fitted to 47 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Atoyac
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.2 C (0.1 to 0.2) per decade
0.3 F (0.2 to 0.4) per decade
1951 to 2011
47
Rise
Mean daily maximum
0.17 C (0.04 to 0.30) per decade
0.3 F (0.1 to 0.5) per decade
1951 to 2011
47
Rise
Mean daily minimum
0.2 C (0.1 to 0.3) per decade
0.3 F (0.1 to 0.5) per decade
1951 to 2011
47
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
1943 to 2012
Yearly extremes at Atoyac: 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)
1989
37.2 C (99.0 F)
70
Coldest night (TNn)
0.0 C (32.0 F)
1955
3.9 C (39.0 F)
70
Wettest day (Rx1day)
83.1 mm (3.3 in)
1972
46.0 mm (1.8 in)
70
Wettest five days (Rx5day)
165.9 mm (6.5 in)
1981
81.4 mm (3.2 in)
70
Longest dry spell (CDD)
161 days
1945
88 days
70
Hottest day (TXx)
The hottest day of the year at Atoyac, 1943 to 2012. The record is 40.0 C (104.0 F) in 1989, marked on the chart; the median year is 37.2 C (99.0 F).
Hottest day (TXx) at Atoyac by year
Year
Hottest day (TXx)
1943
35.0 C (95.0 F)
1944
37.2 C (99.0 F)
1945
37.8 C (100.0 F)
1946
38.3 C (100.9 F)
1947
37.2 C (99.0 F)
1948
37.8 C (100.0 F)
1949
36.7 C (98.1 F)
1950
36.1 C (97.0 F)
1951
36.1 C (97.0 F)
1952
37.8 C (100.0 F)
1953
36.7 C (98.1 F)
1954
36.1 C (97.0 F)
1955
36.7 C (98.1 F)
1956
35.6 C (96.1 F)
1957
36.1 C (97.0 F)
1958
36.7 C (98.1 F)
1959
35.6 C (96.1 F)
1960
37.2 C (99.0 F)
1961
37.2 C (99.0 F)
1962
36.7 C (98.1 F)
1963
36.7 C (98.1 F)
1964
37.2 C (99.0 F)
1965
36.7 C (98.1 F)
1966
35.6 C (96.1 F)
1967
38.3 C (100.9 F)
1968
37.2 C (99.0 F)
1969
37.8 C (100.0 F)
1970
37.2 C (99.0 F)
1971
36.1 C (97.0 F)
1972
36.7 C (98.1 F)
1973
36.7 C (98.1 F)
1974
36.7 C (98.1 F)
1975
35.0 C (95.0 F)
1976
35.0 C (95.0 F)
1977
34.4 C (93.9 F)
1978
36.7 C (98.1 F)
1979
37.2 C (99.0 F)
1980
37.2 C (99.0 F)
1981
36.1 C (97.0 F)
1982
37.2 C (99.0 F)
1983
38.9 C (102.0 F)
1984
36.7 C (98.1 F)
1985
36.7 C (98.1 F)
1986
38.3 C (100.9 F)
1987
36.7 C (98.1 F)
1988
37.2 C (99.0 F)
1989
40.0 C (104.0 F)
1990
35.0 C (95.0 F)
1991
38.3 C (100.9 F)
1992
35.0 C (95.0 F)
1993
36.7 C (98.1 F)
1994
39.4 C (102.9 F)
1995
39.4 C (102.9 F)
1996
38.9 C (102.0 F)
1997
38.9 C (102.0 F)
1998
39.4 C (102.9 F)
1999
38.9 C (102.0 F)
2000
37.2 C (99.0 F)
2001
38.3 C (100.9 F)
2002
38.3 C (100.9 F)
2003
39.4 C (102.9 F)
2004
35.6 C (96.1 F)
2005
40.0 C (104.0 F)
2006
37.8 C (100.0 F)
2007
38.3 C (100.9 F)
2008
38.9 C (102.0 F)
2009
38.9 C (102.0 F)
2010
38.9 C (102.0 F)
2011
40.0 C (104.0 F)
2012
33.9 C (93.0 F)
Coldest night (TNn)
The coldest night of the year at Atoyac, 1943 to 2012. The record is 0.0 C (32.0 F) in 1955, marked on the chart; the median year is 3.9 C (39.0 F).
Coldest night (TNn) at Atoyac by year
Year
Coldest night (TNn)
1943
5.6 C (42.1 F)
1944
3.9 C (39.0 F)
1945
7.8 C (46.0 F)
1946
7.8 C (46.0 F)
1947
6.7 C (44.1 F)
1948
6.1 C (43.0 F)
1949
4.4 C (39.9 F)
1950
3.3 C (37.9 F)
1951
3.3 C (37.9 F)
1952
3.9 C (39.0 F)
1953
1.7 C (35.1 F)
1954
3.3 C (37.9 F)
1955
0.0 C (32.0 F)
1956
3.3 C (37.9 F)
1957
3.9 C (39.0 F)
1958
0.6 C (33.1 F)
1959
2.8 C (37.0 F)
1960
1.7 C (35.1 F)
1961
3.9 C (39.0 F)
1962
3.3 C (37.9 F)
1963
3.9 C (39.0 F)
1964
3.9 C (39.0 F)
1965
3.3 C (37.9 F)
1966
2.2 C (36.0 F)
1967
0.6 C (33.1 F)
1968
3.9 C (39.0 F)
1969
3.9 C (39.0 F)
1970
2.8 C (37.0 F)
1971
6.7 C (44.1 F)
1972
6.7 C (44.1 F)
1973
5.0 C (41.0 F)
1974
7.2 C (45.0 F)
1975
5.0 C (41.0 F)
1976
2.2 C (36.0 F)
1977
5.0 C (41.0 F)
1978
5.0 C (41.0 F)
1979
4.4 C (39.9 F)
1980
5.0 C (41.0 F)
1981
4.4 C (39.9 F)
1982
5.0 C (41.0 F)
1983
0.0 C (32.0 F)
1984
2.8 C (37.0 F)
1985
1.7 C (35.1 F)
1986
3.3 C (37.9 F)
1987
3.3 C (37.9 F)
1988
4.4 C (39.9 F)
1989
3.9 C (39.0 F)
1990
6.1 C (43.0 F)
1991
3.9 C (39.0 F)
1992
3.9 C (39.0 F)
1993
5.0 C (41.0 F)
1994
5.0 C (41.0 F)
1995
5.0 C (41.0 F)
1996
3.9 C (39.0 F)
1997
1.7 C (35.1 F)
1998
2.8 C (37.0 F)
1999
3.9 C (39.0 F)
2000
5.0 C (41.0 F)
2001
3.9 C (39.0 F)
2002
4.4 C (39.9 F)
2003
2.8 C (37.0 F)
2004
3.9 C (39.0 F)
2005
5.0 C (41.0 F)
2006
1.7 C (35.1 F)
2007
5.6 C (42.1 F)
2008
1.7 C (35.1 F)
2009
3.9 C (39.0 F)
2010
1.7 C (35.1 F)
2011
1.7 C (35.1 F)
2012
8.3 C (46.9 F)
Wettest day (Rx1day)
The wettest day of the year at Atoyac, 1943 to 2012. The record is 83.1 mm (3.3 in) in 1972, marked on the chart; the median year is 46.0 mm (1.8 in).
Wettest day (Rx1day) at Atoyac by year
Year
Wettest day (Rx1day)
1943
31.8 mm (1.3 in)
1944
28.2 mm (1.1 in)
1945
41.4 mm (1.6 in)
1946
29.0 mm (1.1 in)
1947
45.5 mm (1.8 in)
1948
34.8 mm (1.4 in)
1949
59.9 mm (2.4 in)
1950
53.8 mm (2.1 in)
1951
31.5 mm (1.2 in)
1952
41.1 mm (1.6 in)
1953
61.0 mm (2.4 in)
1954
41.4 mm (1.6 in)
1955
59.9 mm (2.4 in)
1956
44.2 mm (1.7 in)
1957
30.5 mm (1.2 in)
1958
60.5 mm (2.4 in)
1959
47.8 mm (1.9 in)
1960
67.1 mm (2.6 in)
1961
44.5 mm (1.8 in)
1962
25.7 mm (1.0 in)
1963
43.9 mm (1.7 in)
1964
19.1 mm (0.8 in)
1965
29.5 mm (1.2 in)
1966
55.6 mm (2.2 in)
1967
55.9 mm (2.2 in)
1968
57.2 mm (2.3 in)
1969
48.3 mm (1.9 in)
1970
46.5 mm (1.8 in)
1971
47.0 mm (1.9 in)
1972
83.1 mm (3.3 in)
1973
46.7 mm (1.8 in)
1974
41.9 mm (1.6 in)
1975
35.6 mm (1.4 in)
1976
40.9 mm (1.6 in)
1977
32.3 mm (1.3 in)
1978
52.6 mm (2.1 in)
1979
46.5 mm (1.8 in)
1980
58.2 mm (2.3 in)
1981
64.3 mm (2.5 in)
1982
54.4 mm (2.1 in)
1983
50.0 mm (2.0 in)
1984
38.6 mm (1.5 in)
1985
53.8 mm (2.1 in)
1986
42.7 mm (1.7 in)
1987
63.2 mm (2.5 in)
1988
30.5 mm (1.2 in)
1989
29.0 mm (1.1 in)
1990
27.4 mm (1.1 in)
1991
62.5 mm (2.5 in)
1992
70.9 mm (2.8 in)
1993
69.3 mm (2.7 in)
1994
31.8 mm (1.3 in)
1995
67.8 mm (2.7 in)
1996
32.8 mm (1.3 in)
1997
49.8 mm (2.0 in)
1998
44.5 mm (1.8 in)
1999
25.4 mm (1.0 in)
2000
45.5 mm (1.8 in)
2001
53.8 mm (2.1 in)
2002
40.9 mm (1.6 in)
2003
54.9 mm (2.2 in)
2004
11.2 mm (0.4 in)
2005
31.8 mm (1.3 in)
2006
52.1 mm (2.1 in)
2007
76.2 mm (3.0 in)
2008
47.5 mm (1.9 in)
2009
34.8 mm (1.4 in)
2010
74.4 mm (2.9 in)
2011
60.5 mm (2.4 in)
2012
44.5 mm (1.8 in)
Wettest five days (Rx5day)
The wettest five days of the year at Atoyac, 1943 to 2012. The record is 165.9 mm (6.5 in) in 1981, marked on the chart; the median year is 81.4 mm (3.2 in).
Wettest five days (Rx5day) at Atoyac by year
Year
Wettest five days (Rx5day)
1943
45.3 mm (1.8 in)
1944
55.6 mm (2.2 in)
1945
101.9 mm (4.0 in)
1946
56.9 mm (2.2 in)
1947
72.5 mm (2.9 in)
1948
64.1 mm (2.5 in)
1949
87.5 mm (3.4 in)
1950
101.5 mm (4.0 in)
1951
70.7 mm (2.8 in)
1952
70.6 mm (2.8 in)
1953
76.4 mm (3.0 in)
1954
81.1 mm (3.2 in)
1955
112.5 mm (4.4 in)
1956
76.5 mm (3.0 in)
1957
67.1 mm (2.6 in)
1958
94.9 mm (3.7 in)
1959
80.6 mm (3.2 in)
1960
116.5 mm (4.6 in)
1961
98.8 mm (3.9 in)
1962
76.8 mm (3.0 in)
1963
86.9 mm (3.4 in)
1964
70.6 mm (2.8 in)
1965
73.4 mm (2.9 in)
1966
96.5 mm (3.8 in)
1967
110.0 mm (4.3 in)
1968
149.4 mm (5.9 in)
1969
93.0 mm (3.7 in)
1970
74.3 mm (2.9 in)
1971
61.0 mm (2.4 in)
1972
129.1 mm (5.1 in)
1973
92.9 mm (3.7 in)
1974
75.7 mm (3.0 in)
1975
150.7 mm (5.9 in)
1976
79.0 mm (3.1 in)
1977
81.6 mm (3.2 in)
1978
86.1 mm (3.4 in)
1979
82.3 mm (3.2 in)
1980
145.4 mm (5.7 in)
1981
165.9 mm (6.5 in)
1982
97.6 mm (3.8 in)
1983
76.9 mm (3.0 in)
1984
63.0 mm (2.5 in)
1985
122.6 mm (4.8 in)
1986
125.4 mm (4.9 in)
1987
93.1 mm (3.7 in)
1988
80.0 mm (3.1 in)
1989
63.1 mm (2.5 in)
1990
30.0 mm (1.2 in)
1991
116.3 mm (4.6 in)
1992
136.2 mm (5.4 in)
1993
114.5 mm (4.5 in)
1994
54.1 mm (2.1 in)
1995
107.0 mm (4.2 in)
1996
58.9 mm (2.3 in)
1997
90.7 mm (3.6 in)
1998
80.3 mm (3.2 in)
1999
58.4 mm (2.3 in)
2000
80.8 mm (3.2 in)
2001
62.3 mm (2.5 in)
2002
88.3 mm (3.5 in)
2003
93.8 mm (3.7 in)
2004
13.5 mm (0.5 in)
2005
60.3 mm (2.4 in)
2006
74.2 mm (2.9 in)
2007
89.2 mm (3.5 in)
2008
88.6 mm (3.5 in)
2009
64.0 mm (2.5 in)
2010
131.5 mm (5.2 in)
2011
86.0 mm (3.4 in)
2012
56.2 mm (2.2 in)
Longest dry spell (CDD)
The longest dry spell of the year at Atoyac, 1943 to 2012. The record is 161 days in 1945, marked on the chart; the median year is 88 days.
Longest dry spell (CDD) at Atoyac by year
Year
Longest dry spell (CDD)
1943
39 days
1944
91 days
1945
161 days
1946
86 days
1947
114 days
1948
76 days
1949
73 days
1950
71 days
1951
74 days
1952
54 days
1953
146 days
1954
140 days
1955
123 days
1956
132 days
1957
125 days
1958
83 days
1959
96 days
1960
131 days
1961
84 days
1962
71 days
1963
58 days
1964
78 days
1965
81 days
1966
56 days
1967
69 days
1968
68 days
1969
148 days
1970
99 days
1971
148 days
1972
78 days
1973
62 days
1974
88 days
1975
88 days
1976
91 days
1977
48 days
1978
42 days
1979
98 days
1980
82 days
1981
51 days
1982
141 days
1983
126 days
1984
131 days
1985
84 days
1986
77 days
1987
92 days
1988
99 days
1989
90 days
1990
39 days
1991
81 days
1992
57 days
1993
102 days
1994
125 days
1995
89 days
1996
136 days
1997
50 days
1998
138 days
1999
79 days
2000
130 days
2001
78 days
2002
73 days
2003
108 days
2004
43 days
2005
91 days
2006
120 days
2007
121 days
2008
104 days
2009
67 days
2010
97 days
2011
108 days
2012
11 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
61 years, 1944 to 2011
A day with at least 47.0 mm (1.9 in) of rain is expected about once in 2 years. A day with at least 83.8 mm (3.3 in) of rain is expected about once in 100 years.
Rainfall return levels at Atoyac: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
47.0 mm (1.9 in)
5 years
60.0 mm (2.4 in)
10 years
67.1 mm (2.6 in)
25 years
74.8 mm (2.9 in)
50 years
79.6 mm (3.1 in)
100 years
83.8 mm (3.3 in)
Longer than the 61 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, 61 years of values from 1944 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: 83.1 mm (3.3 in) in 1972; 76.2 mm (3.0 in) in 2007; 74.4 mm (2.9 in) in 2010.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Atoyac, at 2005. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 2005 ran 0.7 C (1.3 F) lower than in the years before (likely change).
Suspected changes in the annual mean temperature at Atoyac, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
2005
-0.7
-1.3
likely
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 Atoyac standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Atoyac 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.