Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Ixmiquilpan (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 Ixmiquilpan (Smn), with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
35.0 C (95.0 F)
-9.4 C (15.1 F)
n/a
n/a
Feb
35.6 C (96.1 F)
-7.2 C (19.0 F)
n/a
n/a
Mar
37.8 C (100.0 F)
-4.4 C (24.1 F)
n/a
n/a
Apr
39.4 C (102.9 F)
-2.8 C (27.0 F)
n/a
n/a
May
43.9 C (111.0 F)
1.7 C (35.1 F)
n/a
n/a
Jun
40.6 C (105.1 F)
0.6 C (33.1 F)
n/a
n/a
Jul
36.7 C (98.1 F)
1.1 C (34.0 F)
n/a
n/a
Aug
37.8 C (100.0 F)
2.8 C (37.0 F)
n/a
n/a
Sep
36.7 C (98.1 F)
0.6 C (33.1 F)
n/a
n/a
Oct
35.0 C (95.0 F)
-3.3 C (26.1 F)
n/a
n/a
Nov
36.1 C (97.0 F)
-6.1 C (21.0 F)
n/a
n/a
Dec
35.6 C (96.1 F)
-6.7 C (19.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Ixmiquilpan (Smn) still stand. 1935 holds the most, with 107.
Standing records at Ixmiquilpan (Smn) by the year they were set
Year set
Standing records
1922
54
1923
48
1924
37
1925
25
1926
69
1927
61
1928
91
1929
11
1930
17
1931
14
1932
20
1933
23
1934
17
1935
107
1936
6
1938
34
1939
49
1940
7
1941
13
1942
16
1943
10
1944
13
1945
9
1946
80
1947
7
1948
6
1949
10
1950
10
1951
37
1952
39
1953
18
1954
14
1955
14
1956
12
1957
9
1958
10
1959
13
1960
17
1961
8
1962
5
1963
4
1964
8
1965
13
1966
12
1967
4
1968
7
1969
6
1970
13
1971
3
1972
5
1973
4
1974
8
1975
9
1976
12
1977
6
1978
9
1979
15
1980
4
1981
11
1982
2
1983
11
1984
8
1985
5
1986
3
1987
9
1988
17
1989
15
1990
6
1991
4
1992
8
1993
21
1994
18
1995
2
1996
4
1997
8
1998
8
1999
13
2000
12
2001
4
2002
7
2003
8
2004
6
2005
5
2006
5
2007
1
2008
21
2009
4
2010
10
2011
3
2012
3
All-Time Record Progression
6 new records
6 all-time records were set at Ixmiquilpan (Smn) between 12 January 1956 and 21 September 2003. Each dot is a new record.
When Ixmiquilpan (Smn) set new all-time records
Date
Kind
Detail
1956-01-12
Record low minimum temperature
Record low minimum temperature -8.9 C (16.0 F)
1956-01-13
Record low minimum temperature
Record low minimum temperature -9.4 C (15.1 F)
1958-01-07
Record low maximum temperature
Record low maximum temperature 8.3 C (46.9 F)
1964-05-23
Record daily precipitation
Record daily precipitation 86.4 mm (3.4 in)
1967-01-11
Record low maximum temperature
Record low maximum temperature 6.1 C (43.0 F)
2003-09-21
Record daily precipitation
Record daily precipitation 92.5 mm (3.6 in)
Wettest Day of Each Month
Sep: 92.5 mm (3.6 in)
The wettest day on record for each calendar month at Ixmiquilpan (Smn). The most was 92.5 mm (3.6 in) on 21 September 2003.
Record daily precipitation for each month at Ixmiquilpan (Smn)
Month
Record daily precipitation (mm)
Date
Jan
32.8 mm (1.3 in)
28 January 1992
Feb
30.0 mm (1.2 in)
3 February 2010
Mar
25.4 mm (1.0 in)
24 March 1972
Apr
44.5 mm (1.8 in)
7 April 1985
May
86.4 mm (3.4 in)
23 May 1964
Jun
58.9 mm (2.3 in)
28 June 1932
Jul
61.0 mm (2.4 in)
20 July 1980
Aug
69.3 mm (2.7 in)
17 August 1949
Sep
92.5 mm (3.6 in)
21 September 2003
Oct
59.9 mm (2.4 in)
20 October 1930
Nov
29.0 mm (1.1 in)
10 November 2006
Dec
42.4 mm (1.7 in)
15 December 1941
Period of Record Coverage
1922 to 2012
Complete yearUnder 90 percent of days
90 years of record at Ixmiquilpan (Smn), 1922 to 2012. 4 years have data for under 90 percent of days and are left out of rankings: 1922, 1924, 1925, 2012.
Cooler than the station meanWarmer than the station mean
One stripe for each of 78 complete years at Ixmiquilpan (Smn), 1923 to 2011. Blue stripes are years cooler than the station's own mean of 18.1 C (64.5 F); red stripes are warmer. The coolest year was 1935, at 14.5 C (58.1 F), and the warmest was 1928, at 20.5 C (68.8 F). The strongest colour marks a difference of 3.6 C (6.5 F).
Annual mean temperature at Ixmiquilpan (Smn) as warming stripes, 1923 to 2011
Year
Annual mean temperature
Difference from the station mean
1923
20.4 C
+2.31 C
1926
19.8 C
+1.72 C
1927
19.3 C
+1.24 C
1928
20.5 C
+2.41 C
1929
17.9 C
-0.18 C
1930
17.8 C
-0.29 C
1931
17.6 C
-0.45 C
1932
17.7 C
-0.40 C
1933
17.2 C
-0.88 C
1934
16.5 C
-1.52 C
1935
14.5 C
-3.56 C
1936
18.0 C
-0.09 C
1938
18.6 C
+0.54 C
1939
19.1 C
+1.03 C
1940
18.4 C
+0.32 C
1942
17.8 C
-0.30 C
1943
16.6 C
-1.49 C
1944
16.9 C
-1.14 C
1945
17.1 C
-0.98 C
1946
16.0 C
-2.09 C
1947
17.9 C
-0.15 C
1948
18.0 C
-0.08 C
1949
18.5 C
+0.44 C
1950
18.4 C
+0.33 C
1951
18.9 C
+0.83 C
1952
18.3 C
+0.22 C
1953
18.5 C
+0.45 C
1954
18.2 C
+0.13 C
1955
18.1 C
-0.01 C
1956
18.0 C
-0.10 C
1957
18.9 C
+0.82 C
1958
18.9 C
+0.80 C
1959
18.6 C
+0.57 C
1960
18.7 C
+0.68 C
1961
18.4 C
+0.31 C
1962
18.8 C
+0.77 C
1963
18.6 C
+0.53 C
1964
19.1 C
+1.04 C
1965
18.9 C
+0.79 C
1966
18.1 C
-0.01 C
1967
17.8 C
-0.29 C
1968
18.4 C
+0.31 C
1969
19.1 C
+1.04 C
1970
18.3 C
+0.20 C
1971
18.3 C
+0.25 C
1972
18.8 C
+0.72 C
1973
18.7 C
+0.62 C
1974
18.0 C
-0.02 C
1975
18.1 C
+0.04 C
1976
17.8 C
-0.29 C
1977
18.6 C
+0.51 C
1978
17.5 C
-0.52 C
1979
16.7 C
-1.33 C
1980
17.2 C
-0.84 C
1981
17.1 C
-0.92 C
1982
17.8 C
-0.24 C
1983
17.6 C
-0.48 C
1984
16.9 C
-1.20 C
1986
16.8 C
-1.22 C
1988
16.0 C
-2.09 C
1989
17.5 C
-0.55 C
1994
16.4 C
-1.69 C
1995
17.3 C
-0.72 C
1996
18.2 C
+0.17 C
1998
18.8 C
+0.77 C
1999
17.7 C
-0.33 C
2000
18.5 C
+0.41 C
2001
18.1 C
+0.05 C
2002
18.4 C
+0.29 C
2003
18.8 C
+0.74 C
2004
18.2 C
+0.12 C
2005
18.4 C
+0.38 C
2006
18.3 C
+0.26 C
2007
18.3 C
+0.23 C
2008
17.6 C
-0.48 C
2009
18.8 C
+0.70 C
2010
17.9 C
-0.13 C
2011
18.7 C
+0.62 C
The fitted trend in annual mean temperature here over 1923 to 2011 is -0.03 C (-0.11 to 0.06) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.05 F (-0.20 to 0.11) per decade. The slope is a straight line fitted to 78 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Ixmiquilpan (Smn)
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.03 C (-0.11 to 0.06) per decade
-0.05 F (-0.20 to 0.11) per decade
1923 to 2011
78
Not clearly different from zero
Mean daily maximum
-0.1 C (-0.2 to 0.1) per decade
-0.1 F (-0.4 to 0.1) per decade
1923 to 2011
78
Not clearly different from zero
Mean daily minimum
0.02 C (-0.08 to 0.12) per decade
0.03 F (-0.14 to 0.21) per decade
1923 to 2011
78
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
1922 to 2012
Yearly extremes at Ixmiquilpan (Smn): the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
43.9 C (111.0 F)
1927
35.6 C (96.1 F)
90
Coldest night (TNn)
-9.4 C (15.1 F)
1956
-3.9 C (25.0 F)
90
Wettest day (Rx1day)
92.5 mm (3.6 in)
2003
41.4 mm (1.6 in)
90
Wettest five days (Rx5day)
204.6 mm (8.1 in)
1935
67.2 mm (2.6 in)
90
Longest dry spell (CDD)
169 days
1926
68 days
90
Hottest day (TXx)
The hottest day of the year at Ixmiquilpan (Smn), 1922 to 2012. The record is 43.9 C (111.0 F) in 1927, marked on the chart; the median year is 35.6 C (96.1 F).
Hottest day (TXx) at Ixmiquilpan (Smn) by year
Year
Hottest day (TXx)
1922
37.8 C (100.0 F)
1923
37.8 C (100.0 F)
1924
38.9 C (102.0 F)
1925
38.9 C (102.0 F)
1926
36.7 C (98.1 F)
1927
43.9 C (111.0 F)
1928
40.0 C (104.0 F)
1929
35.6 C (96.1 F)
1930
35.0 C (95.0 F)
1931
35.6 C (96.1 F)
1932
35.0 C (95.0 F)
1933
37.8 C (100.0 F)
1934
31.7 C (89.1 F)
1935
31.7 C (89.1 F)
1936
32.8 C (91.0 F)
1938
35.0 C (95.0 F)
1939
35.6 C (96.1 F)
1940
36.7 C (98.1 F)
1941
33.9 C (93.0 F)
1942
36.7 C (98.1 F)
1943
35.0 C (95.0 F)
1944
33.9 C (93.0 F)
1945
32.8 C (91.0 F)
1946
34.4 C (93.9 F)
1947
36.7 C (98.1 F)
1948
37.8 C (100.0 F)
1949
35.6 C (96.1 F)
1950
36.7 C (98.1 F)
1951
36.1 C (97.0 F)
1952
35.6 C (96.1 F)
1953
37.8 C (100.0 F)
1954
37.8 C (100.0 F)
1955
36.7 C (98.1 F)
1956
38.9 C (102.0 F)
1957
37.2 C (99.0 F)
1958
36.1 C (97.0 F)
1959
35.0 C (95.0 F)
1960
37.2 C (99.0 F)
1961
36.7 C (98.1 F)
1962
37.2 C (99.0 F)
1963
38.3 C (100.9 F)
1964
36.1 C (97.0 F)
1965
35.0 C (95.0 F)
1966
33.9 C (93.0 F)
1967
35.0 C (95.0 F)
1968
34.4 C (93.9 F)
1969
37.2 C (99.0 F)
1970
37.2 C (99.0 F)
1971
36.7 C (98.1 F)
1972
35.0 C (95.0 F)
1973
36.7 C (98.1 F)
1974
35.0 C (95.0 F)
1975
35.6 C (96.1 F)
1976
33.9 C (93.0 F)
1977
35.6 C (96.1 F)
1978
33.9 C (93.0 F)
1979
32.8 C (91.0 F)
1980
32.8 C (91.0 F)
1981
32.8 C (91.0 F)
1982
35.0 C (95.0 F)
1983
38.3 C (100.9 F)
1984
35.0 C (95.0 F)
1985
35.0 C (95.0 F)
1986
33.9 C (93.0 F)
1987
32.8 C (91.0 F)
1988
33.9 C (93.0 F)
1989
34.4 C (93.9 F)
1990
35.6 C (96.1 F)
1991
36.1 C (97.0 F)
1992
32.8 C (91.0 F)
1993
36.1 C (97.0 F)
1994
35.0 C (95.0 F)
1995
35.0 C (95.0 F)
1996
35.6 C (96.1 F)
1997
35.0 C (95.0 F)
1998
37.8 C (100.0 F)
1999
39.4 C (102.9 F)
2000
34.4 C (93.9 F)
2001
35.0 C (95.0 F)
2002
36.7 C (98.1 F)
2003
37.2 C (99.0 F)
2004
35.0 C (95.0 F)
2005
37.8 C (100.0 F)
2006
35.0 C (95.0 F)
2007
35.0 C (95.0 F)
2008
36.7 C (98.1 F)
2009
35.6 C (96.1 F)
2010
35.6 C (96.1 F)
2011
36.1 C (97.0 F)
2012
38.9 C (102.0 F)
Coldest night (TNn)
The coldest night of the year at Ixmiquilpan (Smn), 1922 to 2012. The record is -9.4 C (15.1 F) in 1956, marked on the chart; the median year is -3.9 C (25.0 F).
Coldest night (TNn) at Ixmiquilpan (Smn) by year
Year
Coldest night (TNn)
1922
0.0 C (32.0 F)
1923
0.6 C (33.1 F)
1924
0.0 C (32.0 F)
1925
0.0 C (32.0 F)
1926
-5.0 C (23.0 F)
1927
-4.4 C (24.1 F)
1928
-5.0 C (23.0 F)
1929
-3.3 C (26.1 F)
1930
-5.0 C (23.0 F)
1931
0.0 C (32.0 F)
1932
-4.4 C (24.1 F)
1933
-4.4 C (24.1 F)
1934
-2.2 C (28.0 F)
1935
-4.4 C (24.1 F)
1936
1.7 C (35.1 F)
1938
0.6 C (33.1 F)
1939
-2.2 C (28.0 F)
1940
-5.6 C (21.9 F)
1941
-6.1 C (21.0 F)
1942
-6.1 C (21.0 F)
1943
-6.7 C (19.9 F)
1944
-6.7 C (19.9 F)
1945
-5.0 C (23.0 F)
1946
-2.2 C (28.0 F)
1947
-1.1 C (30.0 F)
1948
-3.9 C (25.0 F)
1949
-3.9 C (25.0 F)
1950
-5.0 C (23.0 F)
1951
-7.2 C (19.0 F)
1952
-4.4 C (24.1 F)
1953
-6.1 C (21.0 F)
1954
-5.6 C (21.9 F)
1955
-6.1 C (21.0 F)
1956
-9.4 C (15.1 F)
1957
-5.0 C (23.0 F)
1958
-4.4 C (24.1 F)
1959
-3.3 C (26.1 F)
1960
-5.6 C (21.9 F)
1961
-4.4 C (24.1 F)
1962
-3.3 C (26.1 F)
1963
-5.0 C (23.0 F)
1964
0.0 C (32.0 F)
1965
0.0 C (32.0 F)
1966
-5.0 C (23.0 F)
1967
-2.8 C (27.0 F)
1968
-2.8 C (27.0 F)
1969
-1.1 C (30.0 F)
1970
-5.0 C (23.0 F)
1971
-2.2 C (28.0 F)
1972
-3.3 C (26.1 F)
1973
-5.0 C (23.0 F)
1974
-4.4 C (24.1 F)
1975
-5.0 C (23.0 F)
1976
-6.1 C (21.0 F)
1977
-3.3 C (26.1 F)
1978
-2.2 C (28.0 F)
1979
-3.9 C (25.0 F)
1980
-3.3 C (26.1 F)
1981
-5.0 C (23.0 F)
1982
-2.8 C (27.0 F)
1983
-2.8 C (27.0 F)
1984
-3.3 C (26.1 F)
1985
-5.0 C (23.0 F)
1986
-4.4 C (24.1 F)
1987
-3.9 C (25.0 F)
1988
-5.0 C (23.0 F)
1989
-5.0 C (23.0 F)
1990
-0.6 C (30.9 F)
1991
-0.6 C (30.9 F)
1992
-6.7 C (19.9 F)
1993
-4.4 C (24.1 F)
1994
-3.9 C (25.0 F)
1995
-5.0 C (23.0 F)
1996
-3.3 C (26.1 F)
1997
-5.0 C (23.0 F)
1998
-2.8 C (27.0 F)
1999
-3.3 C (26.1 F)
2000
-2.2 C (28.0 F)
2001
-1.7 C (28.9 F)
2002
-2.2 C (28.0 F)
2003
-3.9 C (25.0 F)
2004
-1.1 C (30.0 F)
2005
-1.1 C (30.0 F)
2006
-3.9 C (25.0 F)
2007
0.6 C (33.1 F)
2008
0.0 C (32.0 F)
2009
0.0 C (32.0 F)
2010
-5.0 C (23.0 F)
2011
-2.2 C (28.0 F)
2012
1.7 C (35.1 F)
Wettest day (Rx1day)
The wettest day of the year at Ixmiquilpan (Smn), 1922 to 2012. The record is 92.5 mm (3.6 in) in 2003, marked on the chart; the median year is 41.4 mm (1.6 in).
Wettest day (Rx1day) at Ixmiquilpan (Smn) by year
Year
Wettest day (Rx1day)
1922
36.1 mm (1.4 in)
1923
22.6 mm (0.9 in)
1924
6.1 mm (0.24 in)
1925
6.1 mm (0.24 in)
1926
4.8 mm (0.19 in)
1927
42.4 mm (1.7 in)
1928
43.7 mm (1.7 in)
1929
62.0 mm (2.4 in)
1930
59.9 mm (2.4 in)
1931
39.9 mm (1.6 in)
1932
58.9 mm (2.3 in)
1933
51.8 mm (2.0 in)
1934
34.8 mm (1.4 in)
1935
79.8 mm (3.1 in)
1936
20.8 mm (0.8 in)
1938
36.3 mm (1.4 in)
1939
26.4 mm (1.0 in)
1940
26.2 mm (1.0 in)
1941
42.4 mm (1.7 in)
1942
45.0 mm (1.8 in)
1943
46.2 mm (1.8 in)
1944
58.2 mm (2.3 in)
1945
17.8 mm (0.7 in)
1946
29.2 mm (1.1 in)
1947
63.8 mm (2.5 in)
1948
33.5 mm (1.3 in)
1949
69.3 mm (2.7 in)
1950
48.5 mm (1.9 in)
1951
33.3 mm (1.3 in)
1952
39.9 mm (1.6 in)
1953
43.4 mm (1.7 in)
1954
45.0 mm (1.8 in)
1955
69.3 mm (2.7 in)
1956
43.9 mm (1.7 in)
1957
33.8 mm (1.3 in)
1958
31.5 mm (1.2 in)
1959
50.3 mm (2.0 in)
1960
45.0 mm (1.8 in)
1961
43.9 mm (1.7 in)
1962
41.4 mm (1.6 in)
1963
55.9 mm (2.2 in)
1964
86.4 mm (3.4 in)
1965
45.5 mm (1.8 in)
1966
39.4 mm (1.6 in)
1967
31.0 mm (1.2 in)
1968
53.1 mm (2.1 in)
1969
49.3 mm (1.9 in)
1970
31.5 mm (1.2 in)
1971
84.3 mm (3.3 in)
1972
44.2 mm (1.7 in)
1973
29.0 mm (1.1 in)
1974
36.3 mm (1.4 in)
1975
47.5 mm (1.9 in)
1976
41.4 mm (1.6 in)
1977
25.1 mm (1.0 in)
1978
31.8 mm (1.3 in)
1979
34.8 mm (1.4 in)
1980
61.0 mm (2.4 in)
1981
48.8 mm (1.9 in)
1982
15.5 mm (0.6 in)
1983
18.8 mm (0.7 in)
1984
43.7 mm (1.7 in)
1985
44.5 mm (1.8 in)
1986
37.8 mm (1.5 in)
1987
27.9 mm (1.1 in)
1988
63.8 mm (2.5 in)
1989
33.3 mm (1.3 in)
1990
41.4 mm (1.6 in)
1991
35.8 mm (1.4 in)
1992
32.8 mm (1.3 in)
1993
54.9 mm (2.2 in)
1994
45.5 mm (1.8 in)
1995
22.6 mm (0.9 in)
1996
43.4 mm (1.7 in)
1997
24.4 mm (1.0 in)
1998
25.4 mm (1.0 in)
1999
22.4 mm (0.9 in)
2000
33.8 mm (1.3 in)
2001
58.7 mm (2.3 in)
2002
43.9 mm (1.7 in)
2003
92.5 mm (3.6 in)
2004
68.8 mm (2.7 in)
2005
37.3 mm (1.5 in)
2006
54.4 mm (2.1 in)
2007
36.3 mm (1.4 in)
2008
37.8 mm (1.5 in)
2009
58.9 mm (2.3 in)
2010
43.7 mm (1.7 in)
2011
37.6 mm (1.5 in)
2012
24.9 mm (1.0 in)
Wettest five days (Rx5day)
The wettest five days of the year at Ixmiquilpan (Smn), 1922 to 2012. The record is 204.6 mm (8.1 in) in 1935, marked on the chart; the median year is 67.2 mm (2.6 in).
Wettest five days (Rx5day) at Ixmiquilpan (Smn) by year
Year
Wettest five days (Rx5day)
1922
75.5 mm (3.0 in)
1923
29.2 mm (1.1 in)
1924
7.1 mm (0.28 in)
1925
13.0 mm (0.5 in)
1926
11.4 mm (0.4 in)
1927
42.4 mm (1.7 in)
1928
45.8 mm (1.8 in)
1929
105.4 mm (4.1 in)
1930
112.5 mm (4.4 in)
1931
69.6 mm (2.7 in)
1932
136.4 mm (5.4 in)
1933
91.5 mm (3.6 in)
1934
45.0 mm (1.8 in)
1935
204.6 mm (8.1 in)
1936
46.4 mm (1.8 in)
1938
73.4 mm (2.9 in)
1939
37.3 mm (1.5 in)
1940
49.6 mm (2.0 in)
1941
78.7 mm (3.1 in)
1942
82.8 mm (3.3 in)
1943
97.8 mm (3.9 in)
1944
105.5 mm (4.2 in)
1945
43.2 mm (1.7 in)
1946
49.0 mm (1.9 in)
1947
82.6 mm (3.3 in)
1948
71.3 mm (2.8 in)
1949
73.1 mm (2.9 in)
1950
93.2 mm (3.7 in)
1951
36.3 mm (1.4 in)
1952
80.4 mm (3.2 in)
1953
67.5 mm (2.7 in)
1954
96.2 mm (3.8 in)
1955
89.2 mm (3.5 in)
1956
63.9 mm (2.5 in)
1957
65.6 mm (2.6 in)
1958
79.8 mm (3.1 in)
1959
126.5 mm (5.0 in)
1960
70.2 mm (2.8 in)
1961
98.5 mm (3.9 in)
1962
70.6 mm (2.8 in)
1963
90.5 mm (3.6 in)
1964
104.3 mm (4.1 in)
1965
51.6 mm (2.0 in)
1966
59.5 mm (2.3 in)
1967
53.6 mm (2.1 in)
1968
86.4 mm (3.4 in)
1969
60.5 mm (2.4 in)
1970
74.4 mm (2.9 in)
1971
121.3 mm (4.8 in)
1972
60.8 mm (2.4 in)
1973
85.7 mm (3.4 in)
1974
83.3 mm (3.3 in)
1975
76.8 mm (3.0 in)
1976
74.8 mm (2.9 in)
1977
29.6 mm (1.2 in)
1978
46.2 mm (1.8 in)
1979
63.5 mm (2.5 in)
1980
62.8 mm (2.5 in)
1981
93.8 mm (3.7 in)
1982
33.3 mm (1.3 in)
1983
20.6 mm (0.8 in)
1984
93.7 mm (3.7 in)
1985
61.8 mm (2.4 in)
1986
57.6 mm (2.3 in)
1987
52.6 mm (2.1 in)
1988
76.3 mm (3.0 in)
1989
54.8 mm (2.2 in)
1990
49.1 mm (1.9 in)
1991
73.7 mm (2.9 in)
1992
48.8 mm (1.9 in)
1993
59.8 mm (2.4 in)
1994
56.4 mm (2.2 in)
1995
31.3 mm (1.2 in)
1996
93.6 mm (3.7 in)
1997
51.9 mm (2.0 in)
1998
64.3 mm (2.5 in)
1999
70.2 mm (2.8 in)
2000
48.3 mm (1.9 in)
2001
65.1 mm (2.6 in)
2002
66.8 mm (2.6 in)
2003
131.1 mm (5.2 in)
2004
103.7 mm (4.1 in)
2005
73.4 mm (2.9 in)
2006
56.7 mm (2.2 in)
2007
48.3 mm (1.9 in)
2008
56.0 mm (2.2 in)
2009
61.8 mm (2.4 in)
2010
99.2 mm (3.9 in)
2011
69.8 mm (2.7 in)
2012
27.2 mm (1.1 in)
Longest dry spell (CDD)
The longest dry spell of the year at Ixmiquilpan (Smn), 1922 to 2012. The record is 169 days in 1926, marked on the chart; the median year is 68 days.
Longest dry spell (CDD) at Ixmiquilpan (Smn) by year
Year
Longest dry spell (CDD)
1922
62 days
1923
79 days
1924
157 days
1925
110 days
1926
169 days
1927
120 days
1928
50 days
1929
95 days
1930
82 days
1931
58 days
1932
87 days
1933
113 days
1934
64 days
1935
98 days
1936
69 days
1938
82 days
1939
64 days
1940
52 days
1941
24 days
1942
72 days
1943
79 days
1944
43 days
1945
118 days
1946
45 days
1947
107 days
1948
71 days
1949
61 days
1950
62 days
1951
71 days
1952
51 days
1953
87 days
1954
57 days
1955
96 days
1956
73 days
1957
107 days
1958
53 days
1959
57 days
1960
104 days
1961
87 days
1962
101 days
1963
58 days
1964
47 days
1965
50 days
1966
56 days
1967
64 days
1968
52 days
1969
39 days
1970
81 days
1971
67 days
1972
51 days
1973
60 days
1974
46 days
1975
111 days
1976
70 days
1977
31 days
1978
41 days
1979
36 days
1980
58 days
1981
36 days
1982
61 days
1983
71 days
1984
47 days
1985
68 days
1986
99 days
1987
117 days
1988
118 days
1989
67 days
1990
56 days
1991
68 days
1992
42 days
1993
44 days
1994
78 days
1995
32 days
1996
97 days
1997
76 days
1998
136 days
1999
73 days
2000
95 days
2001
65 days
2002
81 days
2003
96 days
2004
42 days
2005
84 days
2006
49 days
2007
49 days
2008
83 days
2009
82 days
2010
63 days
2011
104 days
2012
37 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.
Frost Dates and Growing Season
63 years with a frost
Across 63 years with a frost, the median last spring frost at Ixmiquilpan (Smn) falls on 18 February and the median first autumn frost on 17 November, which leaves a median of 275 days between them.
In 1968 to 2011 the median growing season was 276 days. That is 2 days more than in 1926 to 1963.
Fitted over all years, the growing season changes by +0.5 days per decade at this station.
Frost dates and growing season at Ixmiquilpan (Smn)
Measure
Median, all years
Earliest period (1926 to 1963)
Recent period (1968 to 2011)
Recent against earliest
Fitted trend
Last spring frost
18 February
18 February
22 February
4 days later
+0.7 days per decade
First autumn frost
17 November
13 November
23 November
10 days later
+1.2 days per decade
Growing days
275 days
274 days
276 days
2 days more
+0.5 days per decade
A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.
Rainfall Return Levels
88 years, 1923 to 2011
A day with at least 40.8 mm (1.6 in) of rain is expected about once in 2 years. A day with at least 86.0 mm (3.4 in) of rain is expected about once in 100 years.
Rainfall return levels at Ixmiquilpan (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
40.8 mm (1.6 in)
5 years
55.7 mm (2.2 in)
10 years
64.3 mm (2.5 in)
25 years
73.9 mm (2.9 in)
50 years
80.3 mm (3.2 in)
100 years
86.0 mm (3.4 in)
Longer than the 88 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, 88 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: 92.5 mm (3.6 in) in 2003; 86.4 mm (3.4 in) in 1964; 84.3 mm (3.3 in) in 1971.
Download the Data
Data for Ixmiquilpan (Smn) standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Ixmiquilpan (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.