Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Ramos Arizpe (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 Ramos Arizpe (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)
-12.2 C (10.0 F)
n/a
n/a
Feb
37.8 C (100.0 F)
-12.2 C (10.0 F)
n/a
n/a
Mar
37.8 C (100.0 F)
-6.1 C (21.0 F)
n/a
n/a
Apr
41.7 C (107.1 F)
-3.3 C (26.1 F)
n/a
n/a
May
45.0 C (113.0 F)
3.3 C (37.9 F)
n/a
n/a
Jun
41.7 C (107.1 F)
6.7 C (44.1 F)
n/a
n/a
Jul
40.0 C (104.0 F)
8.9 C (48.0 F)
n/a
n/a
Aug
42.8 C (109.0 F)
7.8 C (46.0 F)
n/a
n/a
Sep
40.0 C (104.0 F)
3.3 C (37.9 F)
n/a
n/a
Oct
38.9 C (102.0 F)
0.0 C (32.0 F)
n/a
n/a
Nov
35.6 C (96.1 F)
-7.8 C (18.0 F)
n/a
n/a
Dec
35.6 C (96.1 F)
-10.0 C (14.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Ramos Arizpe (Smn) still stand. 2011 holds the most, with 112.
Standing records at Ramos Arizpe (Smn) by the year they were set
Year set
Standing records
1907
1
1908
13
1909
15
1910
6
1911
22
1912
4
1927
20
1928
22
1929
29
1930
16
1931
19
1932
40
1933
23
1934
23
1935
19
1936
33
1937
28
1938
36
1939
32
1940
23
1941
9
1942
10
1943
5
1944
8
1945
12
1946
8
1947
19
1948
21
1949
13
1950
15
1951
15
1952
5
1953
15
1954
8
1955
15
1956
9
1957
12
1958
13
1959
12
1960
18
1961
13
1962
12
1963
13
1964
15
1965
18
1966
14
1967
16
1968
8
1969
13
1970
19
1971
19
1972
14
1973
20
1974
15
1975
17
1976
19
1977
8
1978
15
1979
8
1980
9
1981
10
1982
15
1983
20
1984
19
1985
10
1986
12
1987
15
1988
8
1989
11
1990
11
1991
23
1992
20
1993
18
1994
27
1995
8
2007
48
2008
50
2009
54
2010
22
2011
112
All-Time Record Progression
5 new records
5 all-time records were set at Ramos Arizpe (Smn) between 7 June 1984 and 29 May 2011. Each dot is a new record.
When Ramos Arizpe (Smn) set new all-time records
Date
Kind
Detail
1984-06-07
Record high minimum temperature
Record high minimum temperature 27.8 C (82.0 F)
1988-09-16
Record daily precipitation
Record daily precipitation 115.8 mm (4.6 in)
2007-06-08
Record high maximum temperature
Record high maximum temperature 41.7 C (107.1 F)
2011-05-28
Record high maximum temperature
Record high maximum temperature 43.9 C (111.0 F)
2011-05-29
Record high maximum temperature
Record high maximum temperature 45.0 C (113.0 F)
Wettest Day of Each Month
Sep: 115.8 mm (4.6 in)
The wettest day on record for each calendar month at Ramos Arizpe (Smn). The most was 115.8 mm (4.6 in) on 16 September 1988.
Record daily precipitation for each month at Ramos Arizpe (Smn)
Month
Record daily precipitation (mm)
Date
Jan
29.0 mm (1.1 in)
8 January 1992
Feb
33.8 mm (1.3 in)
5 February 1933
Mar
39.9 mm (1.6 in)
12 March 1974
Apr
35.8 mm (1.4 in)
24 April 1911
May
49.3 mm (1.9 in)
10 May 1934
Jun
43.9 mm (1.7 in)
24 June 1938
Jul
49.8 mm (2.0 in)
20 July 1988
Aug
97.0 mm (3.8 in)
27 August 1909
Sep
115.8 mm (4.6 in)
16 September 1988
Oct
31.0 mm (1.2 in)
26 October 1959
Nov
39.9 mm (1.6 in)
16 November 1976
Dec
39.9 mm (1.6 in)
4 December 1937
Period of Record Coverage
1926 to 2011
Complete yearUnder 90 percent of days
75 years of record at Ramos Arizpe (Smn), 1926 to 2011. 6 years have data for under 90 percent of days and are left out of rankings: 1926, 1927, 1989, 1995, 2009, 2010.
Cooler than the station meanWarmer than the station mean
One stripe for each of 68 complete years at Ramos Arizpe (Smn), 1928 to 2008. Blue stripes are years cooler than the station's own mean of 18.0 C (64.4 F); red stripes are warmer. The coolest year was 1940, at 16.3 C (61.3 F), and the warmest was 2008, at 20.2 C (68.4 F). The strongest colour marks a difference of 2.3 C (4.1 F).
Annual mean temperature at Ramos Arizpe (Smn) as warming stripes, 1928 to 2008
Year
Annual mean temperature
Difference from the station mean
1928
18.7 C
+0.68 C
1929
17.9 C
-0.10 C
1930
17.4 C
-0.62 C
1931
16.9 C
-1.12 C
1932
18.1 C
+0.08 C
1933
18.6 C
+0.62 C
1934
17.6 C
-0.40 C
1935
17.6 C
-0.39 C
1936
17.1 C
-0.89 C
1937
17.5 C
-0.46 C
1938
17.7 C
-0.30 C
1939
16.9 C
-1.11 C
1940
16.3 C
-1.69 C
1941
16.9 C
-1.05 C
1942
16.9 C
-1.09 C
1943
17.2 C
-0.80 C
1944
17.4 C
-0.58 C
1945
18.5 C
+0.50 C
1946
17.8 C
-0.20 C
1947
17.0 C
-0.98 C
1948
17.8 C
-0.15 C
1949
18.2 C
+0.21 C
1950
18.9 C
+0.95 C
1951
18.3 C
+0.31 C
1952
17.5 C
-0.47 C
1953
18.1 C
+0.15 C
1954
18.4 C
+0.37 C
1955
18.3 C
+0.35 C
1956
18.4 C
+0.40 C
1957
18.7 C
+0.75 C
1958
17.8 C
-0.21 C
1959
17.8 C
-0.20 C
1960
18.2 C
+0.22 C
1961
18.1 C
+0.08 C
1962
18.9 C
+0.89 C
1963
18.4 C
+0.41 C
1964
18.6 C
+0.63 C
1965
18.6 C
+0.65 C
1966
17.4 C
-0.56 C
1967
18.2 C
+0.23 C
1968
17.3 C
-0.66 C
1969
18.0 C
-0.01 C
1970
17.5 C
-0.45 C
1971
18.3 C
+0.36 C
1972
18.3 C
+0.28 C
1973
17.5 C
-0.49 C
1974
18.1 C
+0.14 C
1975
18.0 C
+0.01 C
1976
16.7 C
-1.25 C
1977
18.1 C
+0.12 C
1978
17.9 C
-0.12 C
1979
17.8 C
-0.22 C
1980
18.3 C
+0.34 C
1981
17.6 C
-0.37 C
1982
18.4 C
+0.38 C
1983
17.8 C
-0.21 C
1984
18.0 C
+0.06 C
1985
18.3 C
+0.33 C
1986
18.3 C
+0.27 C
1987
17.3 C
-0.71 C
1988
17.7 C
-0.31 C
1990
18.5 C
+0.52 C
1991
18.5 C
+0.54 C
1992
18.0 C
+0.06 C
1993
18.5 C
+0.48 C
1994
19.7 C
+1.68 C
2007
19.9 C
+1.96 C
2008
20.2 C
+2.22 C
The annual mean temperature here has risen by 0.2 C (0.1 to 0.2) per decade over 1928 to 2008. In Fahrenheit: 0.3 F (0.2 to 0.4) per decade. The slope is a straight line fitted to 68 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Ramos Arizpe (Smn)
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
1928 to 2008
68
Rise
Mean daily maximum
-0.18 C (-0.35 to -0.01) per decade
-0.32 F (-0.63 to -0.01) per decade
1928 to 2008
68
Fall
Mean daily minimum
0.5 C (0.4 to 0.6) per decade
0.9 F (0.7 to 1.1) per decade
1928 to 2008
68
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
1907 to 2011
Yearly extremes at Ramos Arizpe (Smn): the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
45.0 C (113.0 F)
2011
35.6 C (96.1 F)
75
Coldest night (TNn)
-12.2 C (10.0 F)
1949
-5.0 C (23.0 F)
82
Wettest day (Rx1day)
115.8 mm (4.6 in)
1988
29.0 mm (1.1 in)
79
Wettest five days (Rx5day)
124.7 mm (4.9 in)
1909
43.7 mm (1.7 in)
79
Longest dry spell (CDD)
147 days
1909
64 days
79
Hottest day (TXx)
The hottest day of the year at Ramos Arizpe (Smn), 1907 to 2011. The record is 45.0 C (113.0 F) in 2011, marked on the chart; the median year is 35.6 C (96.1 F).
Hottest day (TXx) at Ramos Arizpe (Smn) by year
Year
Hottest day (TXx)
1907
n/a
1908
n/a
1909
n/a
1910
n/a
1911
n/a
1912
n/a
1913
n/a
1926
25.6 C (78.1 F)
1927
36.1 C (97.0 F)
1928
40.0 C (104.0 F)
1929
38.9 C (102.0 F)
1930
37.8 C (100.0 F)
1931
35.6 C (96.1 F)
1932
40.0 C (104.0 F)
1933
37.8 C (100.0 F)
1934
35.6 C (96.1 F)
1935
36.1 C (97.0 F)
1936
36.7 C (98.1 F)
1937
37.8 C (100.0 F)
1938
36.1 C (97.0 F)
1939
36.7 C (98.1 F)
1940
35.0 C (95.0 F)
1941
35.0 C (95.0 F)
1942
36.7 C (98.1 F)
1943
35.0 C (95.0 F)
1944
33.9 C (93.0 F)
1945
33.9 C (93.0 F)
1946
32.8 C (91.0 F)
1947
35.6 C (96.1 F)
1948
35.0 C (95.0 F)
1949
35.0 C (95.0 F)
1950
36.7 C (98.1 F)
1951
35.6 C (96.1 F)
1952
35.6 C (96.1 F)
1953
35.6 C (96.1 F)
1954
35.6 C (96.1 F)
1955
35.6 C (96.1 F)
1956
35.0 C (95.0 F)
1957
39.4 C (102.9 F)
1958
36.7 C (98.1 F)
1959
33.9 C (93.0 F)
1960
37.8 C (100.0 F)
1961
38.9 C (102.0 F)
1962
36.7 C (98.1 F)
1963
35.6 C (96.1 F)
1964
36.7 C (98.1 F)
1965
35.6 C (96.1 F)
1966
36.7 C (98.1 F)
1967
36.7 C (98.1 F)
1968
33.9 C (93.0 F)
1969
33.9 C (93.0 F)
1970
35.0 C (95.0 F)
1971
35.0 C (95.0 F)
1972
32.8 C (91.0 F)
1973
33.9 C (93.0 F)
1974
35.0 C (95.0 F)
1975
33.9 C (93.0 F)
1976
31.7 C (89.1 F)
1977
33.9 C (93.0 F)
1978
33.9 C (93.0 F)
1979
33.9 C (93.0 F)
1980
33.9 C (93.0 F)
1981
36.7 C (98.1 F)
1982
35.0 C (95.0 F)
1983
36.7 C (98.1 F)
1984
35.0 C (95.0 F)
1985
35.0 C (95.0 F)
1986
35.6 C (96.1 F)
1987
35.0 C (95.0 F)
1988
32.8 C (91.0 F)
1989
33.9 C (93.0 F)
1990
35.6 C (96.1 F)
1991
35.0 C (95.0 F)
1992
35.0 C (95.0 F)
1993
37.8 C (100.0 F)
1994
37.8 C (100.0 F)
1995
38.9 C (102.0 F)
2007
41.7 C (107.1 F)
2008
40.6 C (105.1 F)
2009
40.6 C (105.1 F)
2010
40.6 C (105.1 F)
2011
45.0 C (113.0 F)
Coldest night (TNn)
The coldest night of the year at Ramos Arizpe (Smn), 1907 to 2011. The record is -12.2 C (10.0 F) in 1949, marked on the chart; the median year is -5.0 C (23.0 F).
Coldest night (TNn) at Ramos Arizpe (Smn) by year
Year
Coldest night (TNn)
1907
-2.8 C (27.0 F)
1908
-7.8 C (18.0 F)
1909
-5.0 C (23.0 F)
1910
-5.0 C (23.0 F)
1911
-8.3 C (17.1 F)
1912
-5.0 C (23.0 F)
1913
1.7 C (35.1 F)
1926
-5.0 C (23.0 F)
1927
-4.4 C (24.1 F)
1928
-6.1 C (21.0 F)
1929
-7.2 C (19.0 F)
1930
-7.2 C (19.0 F)
1931
-4.4 C (24.1 F)
1932
-6.1 C (21.0 F)
1933
-6.1 C (21.0 F)
1934
-5.6 C (21.9 F)
1935
-6.1 C (21.0 F)
1936
-6.7 C (19.9 F)
1937
-5.0 C (23.0 F)
1938
-7.2 C (19.0 F)
1939
-5.0 C (23.0 F)
1940
-9.4 C (15.1 F)
1941
-5.0 C (23.0 F)
1942
-4.4 C (24.1 F)
1943
-7.2 C (19.0 F)
1944
-5.0 C (23.0 F)
1945
-1.7 C (28.9 F)
1946
-3.3 C (26.1 F)
1947
-8.3 C (17.1 F)
1948
-7.2 C (19.0 F)
1949
-12.2 C (10.0 F)
1950
-2.8 C (27.0 F)
1951
-10.0 C (14.0 F)
1952
-2.2 C (28.0 F)
1953
-7.2 C (19.0 F)
1954
-2.2 C (28.0 F)
1955
-6.1 C (21.0 F)
1956
-5.0 C (23.0 F)
1957
-6.1 C (21.0 F)
1958
-2.2 C (28.0 F)
1959
-3.3 C (26.1 F)
1960
-5.0 C (23.0 F)
1961
-2.2 C (28.0 F)
1962
-9.4 C (15.1 F)
1963
-9.4 C (15.1 F)
1964
-8.3 C (17.1 F)
1965
-6.1 C (21.0 F)
1966
-6.1 C (21.0 F)
1967
-6.1 C (21.0 F)
1968
-2.2 C (28.0 F)
1969
-2.2 C (28.0 F)
1970
-4.4 C (24.1 F)
1971
-8.3 C (17.1 F)
1972
-4.4 C (24.1 F)
1973
-5.0 C (23.0 F)
1974
-3.3 C (26.1 F)
1975
-5.0 C (23.0 F)
1976
-5.0 C (23.0 F)
1977
-4.4 C (24.1 F)
1978
-5.0 C (23.0 F)
1979
-6.1 C (21.0 F)
1980
-4.4 C (24.1 F)
1981
-4.4 C (24.1 F)
1982
-3.3 C (26.1 F)
1983
-10.0 C (14.0 F)
1984
-4.4 C (24.1 F)
1985
-7.2 C (19.0 F)
1986
-3.3 C (26.1 F)
1987
-2.2 C (28.0 F)
1988
-3.3 C (26.1 F)
1989
-7.2 C (19.0 F)
1990
-4.4 C (24.1 F)
1991
-1.1 C (30.0 F)
1992
-2.2 C (28.0 F)
1993
-0.6 C (30.9 F)
1994
0.0 C (32.0 F)
1995
-1.1 C (30.0 F)
2007
-4.4 C (24.1 F)
2008
-7.2 C (19.0 F)
2009
-2.2 C (28.0 F)
2010
-7.2 C (19.0 F)
2011
-12.2 C (10.0 F)
Wettest day (Rx1day)
The wettest day of the year at Ramos Arizpe (Smn), 1907 to 2011. The record is 115.8 mm (4.6 in) in 1988, marked on the chart; the median year is 29.0 mm (1.1 in).
Wettest day (Rx1day) at Ramos Arizpe (Smn) by year
Year
Wettest day (Rx1day)
1907
29.7 mm (1.2 in)
1908
22.1 mm (0.9 in)
1909
97.0 mm (3.8 in)
1910
73.7 mm (2.9 in)
1911
49.8 mm (2.0 in)
1912
9.7 mm (0.38 in)
1913
7.4 mm (0.29 in)
1926
0.3 mm (0.01 in)
1927
21.8 mm (0.9 in)
1928
31.8 mm (1.3 in)
1929
15.0 mm (0.6 in)
1930
21.8 mm (0.9 in)
1931
37.8 mm (1.5 in)
1932
29.0 mm (1.1 in)
1933
89.9 mm (3.5 in)
1934
49.3 mm (1.9 in)
1935
27.9 mm (1.1 in)
1936
26.9 mm (1.1 in)
1937
39.9 mm (1.6 in)
1938
68.8 mm (2.7 in)
1939
39.9 mm (1.6 in)
1940
77.0 mm (3.0 in)
1941
20.8 mm (0.8 in)
1942
33.8 mm (1.3 in)
1943
29.5 mm (1.2 in)
1944
21.8 mm (0.9 in)
1945
20.8 mm (0.8 in)
1946
38.9 mm (1.5 in)
1947
34.8 mm (1.4 in)
1948
57.9 mm (2.3 in)
1949
29.5 mm (1.2 in)
1950
23.4 mm (0.9 in)
1951
64.3 mm (2.5 in)
1952
43.7 mm (1.7 in)
1953
20.8 mm (0.8 in)
1954
26.9 mm (1.1 in)
1955
21.8 mm (0.9 in)
1956
17.3 mm (0.7 in)
1957
17.3 mm (0.7 in)
1958
38.4 mm (1.5 in)
1959
37.8 mm (1.5 in)
1960
38.9 mm (1.5 in)
1961
80.8 mm (3.2 in)
1962
19.8 mm (0.8 in)
1963
48.8 mm (1.9 in)
1964
23.4 mm (0.9 in)
1965
25.9 mm (1.0 in)
1966
42.9 mm (1.7 in)
1967
61.0 mm (2.4 in)
1968
19.8 mm (0.8 in)
1969
20.8 mm (0.8 in)
1970
25.9 mm (1.0 in)
1971
31.0 mm (1.2 in)
1972
27.9 mm (1.1 in)
1973
31.0 mm (1.2 in)
1974
39.9 mm (1.6 in)
1975
21.8 mm (0.9 in)
1976
39.9 mm (1.6 in)
1977
35.8 mm (1.4 in)
1978
54.9 mm (2.2 in)
1979
27.9 mm (1.1 in)
1980
15.0 mm (0.6 in)
1981
35.8 mm (1.4 in)
1982
18.8 mm (0.7 in)
1983
31.8 mm (1.3 in)
1984
19.8 mm (0.8 in)
1985
39.9 mm (1.6 in)
1986
19.8 mm (0.8 in)
1987
26.9 mm (1.1 in)
1988
115.8 mm (4.6 in)
1989
33.8 mm (1.3 in)
1990
34.8 mm (1.4 in)
1991
23.9 mm (0.9 in)
1992
29.0 mm (1.1 in)
1993
21.8 mm (0.9 in)
1994
14.0 mm (0.6 in)
1995
3.8 mm (0.15 in)
2007
n/a
2008
n/a
2009
21.8 mm (0.9 in)
2010
21.8 mm (0.9 in)
2011
n/a
Wettest five days (Rx5day)
The wettest five days of the year at Ramos Arizpe (Smn), 1907 to 2011. The record is 124.7 mm (4.9 in) in 1909, marked on the chart; the median year is 43.7 mm (1.7 in).
Wettest five days (Rx5day) at Ramos Arizpe (Smn) by year
Year
Wettest five days (Rx5day)
1907
33.8 mm (1.3 in)
1908
33.5 mm (1.3 in)
1909
124.7 mm (4.9 in)
1910
98.6 mm (3.9 in)
1911
50.6 mm (2.0 in)
1912
22.6 mm (0.9 in)
1913
12.2 mm (0.5 in)
1926
0.3 mm (0.01 in)
1927
23.6 mm (0.9 in)
1928
46.7 mm (1.8 in)
1929
23.9 mm (0.9 in)
1930
48.6 mm (1.9 in)
1931
48.6 mm (1.9 in)
1932
42.0 mm (1.7 in)
1933
108.2 mm (4.3 in)
1934
76.5 mm (3.0 in)
1935
46.2 mm (1.8 in)
1936
38.2 mm (1.5 in)
1937
41.6 mm (1.6 in)
1938
70.1 mm (2.8 in)
1939
59.7 mm (2.4 in)
1940
85.4 mm (3.4 in)
1941
39.6 mm (1.6 in)
1942
49.3 mm (1.9 in)
1943
33.3 mm (1.3 in)
1944
22.9 mm (0.9 in)
1945
35.1 mm (1.4 in)
1946
40.7 mm (1.6 in)
1947
66.8 mm (2.6 in)
1948
111.5 mm (4.4 in)
1949
37.4 mm (1.5 in)
1950
29.0 mm (1.1 in)
1951
105.4 mm (4.1 in)
1952
43.7 mm (1.7 in)
1953
54.4 mm (2.1 in)
1954
49.1 mm (1.9 in)
1955
27.4 mm (1.1 in)
1956
17.3 mm (0.7 in)
1957
23.6 mm (0.9 in)
1958
68.8 mm (2.7 in)
1959
51.3 mm (2.0 in)
1960
61.9 mm (2.4 in)
1961
85.4 mm (3.4 in)
1962
24.2 mm (1.0 in)
1963
51.6 mm (2.0 in)
1964
38.4 mm (1.5 in)
1965
25.9 mm (1.0 in)
1966
42.9 mm (1.7 in)
1967
107.7 mm (4.2 in)
1968
46.3 mm (1.8 in)
1969
34.8 mm (1.4 in)
1970
40.7 mm (1.6 in)
1971
64.5 mm (2.5 in)
1972
55.2 mm (2.2 in)
1973
48.4 mm (1.9 in)
1974
51.8 mm (2.0 in)
1975
43.6 mm (1.7 in)
1976
62.5 mm (2.5 in)
1977
48.5 mm (1.9 in)
1978
57.5 mm (2.3 in)
1979
42.6 mm (1.7 in)
1980
22.6 mm (0.9 in)
1981
61.4 mm (2.4 in)
1982
33.6 mm (1.3 in)
1983
46.9 mm (1.8 in)
1984
26.4 mm (1.0 in)
1985
55.7 mm (2.2 in)
1986
37.5 mm (1.5 in)
1987
37.6 mm (1.5 in)
1988
122.4 mm (4.8 in)
1989
48.5 mm (1.9 in)
1990
55.4 mm (2.2 in)
1991
33.6 mm (1.3 in)
1992
50.3 mm (2.0 in)
1993
33.2 mm (1.3 in)
1994
22.9 mm (0.9 in)
1995
7.6 mm (0.30 in)
2007
n/a
2008
n/a
2009
21.8 mm (0.9 in)
2010
21.8 mm (0.9 in)
2011
n/a
Longest dry spell (CDD)
The longest dry spell of the year at Ramos Arizpe (Smn), 1907 to 2011. The record is 147 days in 1909, marked on the chart; the median year is 64 days.
Longest dry spell (CDD) at Ramos Arizpe (Smn) by year
Year
Longest dry spell (CDD)
1907
26 days
1908
79 days
1909
147 days
1910
88 days
1911
104 days
1912
100 days
1913
23 days
1926
31 days
1927
89 days
1928
50 days
1929
106 days
1930
49 days
1931
48 days
1932
56 days
1933
55 days
1934
69 days
1935
76 days
1936
71 days
1937
79 days
1938
70 days
1939
47 days
1940
89 days
1941
42 days
1942
72 days
1943
78 days
1944
52 days
1945
69 days
1946
45 days
1947
92 days
1948
68 days
1949
61 days
1950
60 days
1951
76 days
1952
94 days
1953
51 days
1954
64 days
1955
81 days
1956
110 days
1957
51 days
1958
39 days
1959
44 days
1960
52 days
1961
44 days
1962
63 days
1963
48 days
1964
52 days
1965
69 days
1966
69 days
1967
45 days
1968
51 days
1969
51 days
1970
96 days
1971
85 days
1972
45 days
1973
77 days
1974
81 days
1975
102 days
1976
78 days
1977
120 days
1978
57 days
1979
58 days
1980
68 days
1981
62 days
1982
55 days
1983
81 days
1984
105 days
1985
76 days
1986
64 days
1987
60 days
1988
64 days
1989
72 days
1990
74 days
1991
53 days
1992
41 days
1993
56 days
1994
72 days
1995
97 days
2007
n/a
2008
n/a
2009
21 days
2010
21 days
2011
n/a
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
64 years with a frost
Across 64 years with a frost, the median last spring frost at Ramos Arizpe (Smn) falls on 10 March and the median first autumn frost on 28 November, which leaves a median of 263 days between them.
In 1962 to 2008 the median growing season was 275 days. That is 27 days more than in 1928 to 1957.
Fitted over all years, the growing season changes by +7.5 days per decade at this station.
Frost dates and growing season at Ramos Arizpe (Smn)
Measure
Median, all years
Earliest period (1928 to 1957)
Recent period (1962 to 2008)
Recent against earliest
Fitted trend
Last spring frost
10 March
16 March
28 February
16 days earlier
-4.9 days per decade
First autumn frost
28 November
22 November
6 December
14 days later
+2.5 days per decade
Growing days
263 days
248 days
275 days
27 days more
+7.5 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
71 years, 1908 to 1994
A day with at least 30.4 mm (1.2 in) of rain is expected about once in 2 years. A day with at least 123.3 mm (4.9 in) of rain is expected about once in 100 years.
Rainfall return levels at Ramos Arizpe (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
30.4 mm (1.2 in)
5 years
46.5 mm (1.8 in)
10 years
60.0 mm (2.4 in)
25 years
81.2 mm (3.2 in)
50 years
100.4 mm (4.0 in)
100 years
123.3 mm (4.9 in)
Longer than the 71 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, 71 years of values from 1908 to 1994.
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: 115.8 mm (4.6 in) in 1988; 97.0 mm (3.8 in) in 1909; 89.9 mm (3.5 in) in 1933.
Download the Data
Data for Ramos Arizpe (Smn) standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Ramos Arizpe (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 2026-10-17 (17 October 2026). Records are computed by this site and are not official.