Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Ciudad Altamirano. 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 Ciudad Altamirano, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
42.8 C (109.0 F)
8.9 C (48.0 F)
n/a
n/a
Feb
40.6 C (105.1 F)
7.8 C (46.0 F)
n/a
n/a
Mar
42.8 C (109.0 F)
10.6 C (51.1 F)
n/a
n/a
Apr
43.9 C (111.0 F)
11.1 C (52.0 F)
n/a
n/a
May
45.6 C (114.1 F)
13.3 C (55.9 F)
n/a
n/a
Jun
46.7 C (116.1 F)
13.3 C (55.9 F)
n/a
n/a
Jul
40.6 C (105.1 F)
14.4 C (57.9 F)
n/a
n/a
Aug
41.1 C (106.0 F)
15.0 C (59.0 F)
n/a
n/a
Sep
38.9 C (102.0 F)
13.9 C (57.0 F)
n/a
n/a
Oct
40.6 C (105.1 F)
12.2 C (54.0 F)
n/a
n/a
Nov
40.0 C (104.0 F)
10.0 C (50.0 F)
n/a
n/a
Dec
39.4 C (102.9 F)
4.4 C (39.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Ciudad Altamirano still stand. 1970 holds the most, with 210.
Standing records at Ciudad Altamirano by the year they were set
Year set
Standing records
1954
41
1955
26
1956
75
1957
25
1958
34
1959
30
1960
67
1961
26
1962
15
1963
22
1964
20
1965
26
1966
18
1967
9
1968
13
1969
17
1970
210
1971
11
1972
8
1973
7
1974
14
1975
11
1976
10
1977
15
1978
9
1979
13
1980
10
1981
8
1982
15
1983
37
1984
16
1985
8
1986
21
1987
26
1988
15
1989
22
1990
12
1991
17
1992
28
1993
15
1994
13
1995
15
1996
10
1997
25
1998
76
1999
16
2000
47
2001
8
2002
13
2003
13
2004
13
2005
20
2006
13
2007
17
2008
10
2009
16
2010
23
2011
46
2012
25
2013
23
Wettest Day of Each Month
Jun: 122.9 mm (4.8 in)
The wettest day on record for each calendar month at Ciudad Altamirano. The most was 122.9 mm (4.8 in) on 30 June 1961.
Record daily precipitation for each month at Ciudad Altamirano
Month
Record daily precipitation (mm)
Date
Jan
71.9 mm (2.8 in)
25 January 1980
Feb
121.2 mm (4.8 in)
3 February 2010
Mar
25.9 mm (1.0 in)
2 March 2001
Apr
15.7 mm (0.6 in)
12 April 1954
May
114.8 mm (4.5 in)
29 May 1966
Jun
122.9 mm (4.8 in)
30 June 1961
Jul
122.4 mm (4.8 in)
17 July 2007
Aug
96.8 mm (3.8 in)
25 August 1967
Sep
119.9 mm (4.7 in)
25 September 1956
Oct
78.0 mm (3.1 in)
5 October 1976
Nov
52.8 mm (2.1 in)
9 November 1990
Dec
29.5 mm (1.2 in)
1 December 1983
Period of Record Coverage
1954 to 2013
Complete yearUnder 90 percent of days
60 years of record at Ciudad Altamirano, 1954 to 2013. 6 years have data for under 90 percent of days and are left out of rankings: 1954, 1960, 1961, 1962, 2001, 2013.
Cooler than the station meanWarmer than the station mean
One stripe for each of 50 complete years at Ciudad Altamirano, 1955 to 2012. Blue stripes are years cooler than the station's own mean of 28.1 C (82.5 F); red stripes are warmer. The coolest year was 1970, at 25.5 C (77.9 F), and the warmest was 2011, at 29.6 C (85.2 F). The strongest colour marks a difference of 2.6 C (4.7 F).
Annual mean temperature at Ciudad Altamirano as warming stripes, 1955 to 2012
Year
Annual mean temperature
Difference from the station mean
1955
27.7 C
-0.36 C
1956
26.8 C
-1.25 C
1957
28.4 C
+0.34 C
1958
28.1 C
+0.04 C
1963
28.7 C
+0.63 C
1964
28.5 C
+0.46 C
1965
28.6 C
+0.49 C
1966
28.4 C
+0.33 C
1967
27.8 C
-0.24 C
1968
27.6 C
-0.48 C
1969
28.5 C
+0.41 C
1970
25.5 C
-2.56 C
1971
27.1 C
-0.95 C
1972
27.5 C
-0.62 C
1973
27.3 C
-0.78 C
1974
27.4 C
-0.66 C
1975
26.9 C
-1.23 C
1976
27.1 C
-0.98 C
1977
27.1 C
-1.02 C
1978
27.2 C
-0.93 C
1979
27.5 C
-0.58 C
1980
27.2 C
-0.88 C
1981
27.2 C
-0.92 C
1982
28.6 C
+0.48 C
1983
28.4 C
+0.35 C
1984
28.5 C
+0.43 C
1985
28.7 C
+0.60 C
1986
27.9 C
-0.19 C
1987
28.3 C
+0.20 C
1988
28.1 C
+0.05 C
1989
27.7 C
-0.42 C
1991
28.3 C
+0.26 C
1992
27.7 C
-0.41 C
1994
28.9 C
+0.83 C
1995
28.8 C
+0.75 C
1996
28.0 C
-0.07 C
1997
27.6 C
-0.44 C
1999
27.8 C
-0.26 C
2000
28.1 C
-0.02 C
2002
28.5 C
+0.41 C
2003
28.5 C
+0.38 C
2004
28.3 C
+0.21 C
2005
28.9 C
+0.80 C
2006
28.9 C
+0.78 C
2007
29.3 C
+1.25 C
2008
29.1 C
+1.03 C
2009
29.5 C
+1.41 C
2010
28.6 C
+0.52 C
2011
29.6 C
+1.50 C
2012
29.4 C
+1.33 C
The annual mean temperature here has risen by 0.3 C (0.1 to 0.4) per decade over 1955 to 2012. In Fahrenheit: 0.5 F (0.3 to 0.7) per decade. The slope is a straight line fitted to 50 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Ciudad Altamirano
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.3 C (0.1 to 0.4) per decade
0.5 F (0.3 to 0.7) per decade
1955 to 2012
50
Rise
Mean daily maximum
0.2 C (0.1 to 0.3) per decade
0.3 F (0.1 to 0.6) per decade
1955 to 2012
50
Rise
Mean daily minimum
0.3 C (0.2 to 0.5) per decade
0.6 F (0.3 to 0.9) per decade
1955 to 2012
50
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
1954 to 2013
Yearly extremes at Ciudad Altamirano: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
46.7 C (116.1 F)
1960
42.8 C (109.0 F)
60
Coldest night (TNn)
4.4 C (39.9 F)
1954
11.7 C (53.1 F)
60
Wettest day (Rx1day)
122.9 mm (4.8 in)
1961
70.2 mm (2.8 in)
60
Wettest five days (Rx5day)
195.4 mm (7.7 in)
2011
126.8 mm (5.0 in)
60
Longest dry spell (CDD)
167 days
1957
104 days
60
Hottest day (TXx)
The hottest day of the year at Ciudad Altamirano, 1954 to 2013. The record is 46.7 C (116.1 F) in 1960, marked on the chart; the median year is 42.8 C (109.0 F).
Hottest day (TXx) at Ciudad Altamirano by year
Year
Hottest day (TXx)
1954
41.7 C (107.1 F)
1955
42.8 C (109.0 F)
1956
42.8 C (109.0 F)
1957
43.9 C (111.0 F)
1958
45.0 C (113.0 F)
1959
42.2 C (108.0 F)
1960
46.7 C (116.1 F)
1961
41.1 C (106.0 F)
1962
42.8 C (109.0 F)
1963
43.3 C (109.9 F)
1964
44.4 C (111.9 F)
1965
45.0 C (113.0 F)
1966
43.3 C (109.9 F)
1967
42.8 C (109.0 F)
1968
41.7 C (107.1 F)
1969
43.3 C (109.9 F)
1970
42.8 C (109.0 F)
1971
41.7 C (107.1 F)
1972
42.2 C (108.0 F)
1973
42.2 C (108.0 F)
1974
42.2 C (108.0 F)
1975
41.7 C (107.1 F)
1976
43.3 C (109.9 F)
1977
41.7 C (107.1 F)
1978
41.7 C (107.1 F)
1979
41.7 C (107.1 F)
1980
42.8 C (109.0 F)
1981
41.7 C (107.1 F)
1982
43.3 C (109.9 F)
1983
45.0 C (113.0 F)
1984
43.3 C (109.9 F)
1985
42.8 C (109.0 F)
1986
43.9 C (111.0 F)
1987
43.9 C (111.0 F)
1988
42.8 C (109.0 F)
1989
43.9 C (111.0 F)
1990
41.7 C (107.1 F)
1991
43.9 C (111.0 F)
1992
42.8 C (109.0 F)
1993
44.4 C (111.9 F)
1994
43.9 C (111.0 F)
1995
43.9 C (111.0 F)
1996
43.3 C (109.9 F)
1997
42.8 C (109.0 F)
1998
43.3 C (109.9 F)
1999
43.9 C (111.0 F)
2000
38.9 C (102.0 F)
2001
41.7 C (107.1 F)
2002
42.8 C (109.0 F)
2003
43.3 C (109.9 F)
2004
42.8 C (109.0 F)
2005
43.9 C (111.0 F)
2006
43.3 C (109.9 F)
2007
42.8 C (109.0 F)
2008
42.8 C (109.0 F)
2009
42.8 C (109.0 F)
2010
45.6 C (114.1 F)
2011
45.0 C (113.0 F)
2012
42.8 C (109.0 F)
2013
42.8 C (109.0 F)
Coldest night (TNn)
The coldest night of the year at Ciudad Altamirano, 1954 to 2013. The record is 4.4 C (39.9 F) in 1954, marked on the chart; the median year is 11.7 C (53.1 F).
Coldest night (TNn) at Ciudad Altamirano by year
Year
Coldest night (TNn)
1954
4.4 C (39.9 F)
1955
8.9 C (48.0 F)
1956
10.0 C (50.0 F)
1957
10.6 C (51.1 F)
1958
12.8 C (55.0 F)
1959
12.2 C (54.0 F)
1960
10.6 C (51.1 F)
1961
11.7 C (53.1 F)
1962
13.3 C (55.9 F)
1963
12.8 C (55.0 F)
1964
12.2 C (54.0 F)
1965
11.1 C (52.0 F)
1966
12.8 C (55.0 F)
1967
10.6 C (51.1 F)
1968
11.1 C (52.0 F)
1969
12.8 C (55.0 F)
1970
7.8 C (46.0 F)
1971
10.6 C (51.1 F)
1972
11.1 C (52.0 F)
1973
10.6 C (51.1 F)
1974
11.7 C (53.1 F)
1975
11.1 C (52.0 F)
1976
11.7 C (53.1 F)
1977
11.7 C (53.1 F)
1978
10.6 C (51.1 F)
1979
10.0 C (50.0 F)
1980
11.7 C (53.1 F)
1981
12.8 C (55.0 F)
1982
11.1 C (52.0 F)
1983
11.7 C (53.1 F)
1984
15.0 C (59.0 F)
1985
15.6 C (60.1 F)
1986
10.6 C (51.1 F)
1987
15.0 C (59.0 F)
1988
13.9 C (57.0 F)
1989
14.4 C (57.9 F)
1990
14.4 C (57.9 F)
1991
12.8 C (55.0 F)
1992
12.8 C (55.0 F)
1993
13.3 C (55.9 F)
1994
15.0 C (59.0 F)
1995
12.2 C (54.0 F)
1996
11.7 C (53.1 F)
1997
8.9 C (48.0 F)
1998
10.0 C (50.0 F)
1999
12.8 C (55.0 F)
2000
15.6 C (60.1 F)
2001
13.3 C (55.9 F)
2002
11.7 C (53.1 F)
2003
8.3 C (46.9 F)
2004
10.0 C (50.0 F)
2005
14.4 C (57.9 F)
2006
12.8 C (55.0 F)
2007
13.9 C (57.0 F)
2008
13.9 C (57.0 F)
2009
12.8 C (55.0 F)
2010
11.7 C (53.1 F)
2011
11.7 C (53.1 F)
2012
15.0 C (59.0 F)
2013
15.0 C (59.0 F)
Wettest day (Rx1day)
The wettest day of the year at Ciudad Altamirano, 1954 to 2013. The record is 122.9 mm (4.8 in) in 1961, marked on the chart; the median year is 70.2 mm (2.8 in).
Wettest day (Rx1day) at Ciudad Altamirano by year
Year
Wettest day (Rx1day)
1954
54.4 mm (2.1 in)
1955
55.4 mm (2.2 in)
1956
119.9 mm (4.7 in)
1957
25.9 mm (1.0 in)
1958
40.4 mm (1.6 in)
1959
69.9 mm (2.8 in)
1960
48.3 mm (1.9 in)
1961
122.9 mm (4.8 in)
1962
70.4 mm (2.8 in)
1963
78.0 mm (3.1 in)
1964
64.8 mm (2.6 in)
1965
65.8 mm (2.6 in)
1966
114.8 mm (4.5 in)
1967
96.8 mm (3.8 in)
1968
61.5 mm (2.4 in)
1969
86.9 mm (3.4 in)
1970
66.3 mm (2.6 in)
1971
39.9 mm (1.6 in)
1972
71.9 mm (2.8 in)
1973
49.3 mm (1.9 in)
1974
72.1 mm (2.8 in)
1975
77.5 mm (3.1 in)
1976
78.0 mm (3.1 in)
1977
73.9 mm (2.9 in)
1978
65.3 mm (2.6 in)
1979
86.9 mm (3.4 in)
1980
87.1 mm (3.4 in)
1981
64.3 mm (2.5 in)
1982
69.3 mm (2.7 in)
1983
43.4 mm (1.7 in)
1984
58.4 mm (2.3 in)
1985
74.7 mm (2.9 in)
1986
70.4 mm (2.8 in)
1987
43.2 mm (1.7 in)
1988
55.4 mm (2.2 in)
1989
49.8 mm (2.0 in)
1990
78.5 mm (3.1 in)
1991
72.4 mm (2.9 in)
1992
94.7 mm (3.7 in)
1993
72.6 mm (2.9 in)
1994
63.8 mm (2.5 in)
1995
52.1 mm (2.1 in)
1996
72.4 mm (2.9 in)
1997
51.8 mm (2.0 in)
1998
104.9 mm (4.1 in)
1999
55.9 mm (2.2 in)
2000
69.9 mm (2.8 in)
2001
25.9 mm (1.0 in)
2002
86.9 mm (3.4 in)
2003
63.8 mm (2.5 in)
2004
81.8 mm (3.2 in)
2005
72.6 mm (2.9 in)
2006
49.3 mm (1.9 in)
2007
122.4 mm (4.8 in)
2008
75.7 mm (3.0 in)
2009
69.6 mm (2.7 in)
2010
121.2 mm (4.8 in)
2011
89.7 mm (3.5 in)
2012
78.5 mm (3.1 in)
2013
43.2 mm (1.7 in)
Wettest five days (Rx5day)
The wettest five days of the year at Ciudad Altamirano, 1954 to 2013. The record is 195.4 mm (7.7 in) in 2011, marked on the chart; the median year is 126.8 mm (5.0 in).
Wettest five days (Rx5day) at Ciudad Altamirano by year
Year
Wettest five days (Rx5day)
1954
118.4 mm (4.7 in)
1955
122.0 mm (4.8 in)
1956
194.8 mm (7.7 in)
1957
78.5 mm (3.1 in)
1958
86.6 mm (3.4 in)
1959
132.9 mm (5.2 in)
1960
122.5 mm (4.8 in)
1961
122.9 mm (4.8 in)
1962
101.4 mm (4.0 in)
1963
147.6 mm (5.8 in)
1964
127.3 mm (5.0 in)
1965
138.2 mm (5.4 in)
1966
177.3 mm (7.0 in)
1967
173.7 mm (6.8 in)
1968
117.5 mm (4.6 in)
1969
146.8 mm (5.8 in)
1970
94.8 mm (3.7 in)
1971
86.1 mm (3.4 in)
1972
170.7 mm (6.7 in)
1973
105.5 mm (4.2 in)
1974
164.6 mm (6.5 in)
1975
134.9 mm (5.3 in)
1976
119.9 mm (4.7 in)
1977
121.9 mm (4.8 in)
1978
109.8 mm (4.3 in)
1979
116.1 mm (4.6 in)
1980
157.8 mm (6.2 in)
1981
137.0 mm (5.4 in)
1982
129.1 mm (5.1 in)
1983
101.6 mm (4.0 in)
1984
128.0 mm (5.0 in)
1985
174.8 mm (6.9 in)
1986
124.8 mm (4.9 in)
1987
104.6 mm (4.1 in)
1988
130.3 mm (5.1 in)
1989
117.9 mm (4.6 in)
1990
173.1 mm (6.8 in)
1991
114.9 mm (4.5 in)
1992
192.0 mm (7.6 in)
1993
170.3 mm (6.7 in)
1994
96.3 mm (3.8 in)
1995
99.1 mm (3.9 in)
1996
126.3 mm (5.0 in)
1997
135.4 mm (5.3 in)
1998
192.3 mm (7.6 in)
1999
99.9 mm (3.9 in)
2000
111.8 mm (4.4 in)
2001
25.9 mm (1.0 in)
2002
132.4 mm (5.2 in)
2003
136.5 mm (5.4 in)
2004
162.8 mm (6.4 in)
2005
97.7 mm (3.8 in)
2006
86.6 mm (3.4 in)
2007
142.3 mm (5.6 in)
2008
161.5 mm (6.4 in)
2009
120.2 mm (4.7 in)
2010
153.2 mm (6.0 in)
2011
195.4 mm (7.7 in)
2012
128.1 mm (5.0 in)
2013
83.8 mm (3.3 in)
Longest dry spell (CDD)
The longest dry spell of the year at Ciudad Altamirano, 1954 to 2013. The record is 167 days in 1957, marked on the chart; the median year is 104 days.
Longest dry spell (CDD) at Ciudad Altamirano by year
Year
Longest dry spell (CDD)
1954
50 days
1955
156 days
1956
112 days
1957
167 days
1958
127 days
1959
102 days
1960
109 days
1961
75 days
1962
54 days
1963
141 days
1964
131 days
1965
71 days
1966
91 days
1967
94 days
1968
64 days
1969
140 days
1970
151 days
1971
142 days
1972
109 days
1973
129 days
1974
69 days
1975
108 days
1976
59 days
1977
91 days
1978
73 days
1979
143 days
1980
105 days
1981
66 days
1982
76 days
1983
72 days
1984
143 days
1985
123 days
1986
139 days
1987
109 days
1988
94 days
1989
94 days
1990
96 days
1991
130 days
1992
100 days
1993
163 days
1994
74 days
1995
71 days
1996
135 days
1997
79 days
1998
155 days
1999
136 days
2000
141 days
2001
51 days
2002
85 days
2003
142 days
2004
84 days
2005
94 days
2006
120 days
2007
67 days
2008
119 days
2009
113 days
2010
109 days
2011
100 days
2012
91 days
2013
71 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
55 years, 1955 to 2012
A day with at least 69.3 mm (2.7 in) of rain is expected about once in 2 years. A day with at least 127.3 mm (5.0 in) of rain is expected about once in 100 years.
Rainfall return levels at Ciudad Altamirano: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
69.3 mm (2.7 in)
5 years
87.7 mm (3.5 in)
10 years
98.6 mm (3.9 in)
25 years
111.1 mm (4.4 in)
50 years
119.6 mm (4.7 in)
100 years
127.3 mm (5.0 in)
Longer than the 55 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, 55 years of values from 1955 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: 122.4 mm (4.8 in) in 2007; 121.2 mm (4.8 in) in 2010; 119.9 mm (4.7 in) in 1956.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Ciudad Altamirano, at 1970. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1970 ran 0.6 C (1.2 F) lower than in the years before (possible change).
Suspected changes in the annual mean temperature at Ciudad Altamirano, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1970
-0.6
-1.2
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 Ciudad Altamirano standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Ciudad Altamirano 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.