Record envelope, standing records and threshold days for Hammon 3 SSW (USC00343871), Oklahoma, United States, with 86 years of record.
Key Facts for Hammon 3 SSW
Hammon 3 SSW (USC00343871) is a weather station in Oklahoma, United States at 35.59 latitude and -99.40 longitude, 555 m (1,820 ft) above sea level.
The station reports from 1920 to 2005, 86 years of record.
1,464 records set at Hammon 3 SSW still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Hammon 3 SSW tied a daily record high maximum temperature of 31.7 C (89.1 F) on 9 November 2005.
About the Station
Location: Oklahoma, United States, 35.59 latitude, -99.40 longitude.
Elevation: 555 m (1,820 ft).
Period of record: 1920 to 2005, 86 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
0 days at or beyond a record
Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Hammon 3 SSW. 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 Hammon 3 SSW, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
29.4 C (84.9 F)
-27.8 C (-18.0 F)
n/a
n/a
Feb
32.8 C (91.0 F)
-26.7 C (-16.1 F)
n/a
n/a
Mar
36.1 C (97.0 F)
-20.0 C (-4.0 F)
n/a
n/a
Apr
38.3 C (100.9 F)
-8.3 C (17.1 F)
n/a
n/a
May
41.7 C (107.1 F)
-1.7 C (28.9 F)
n/a
n/a
Jun
46.1 C (115.0 F)
5.6 C (42.1 F)
n/a
n/a
Jul
43.9 C (111.0 F)
8.9 C (48.0 F)
n/a
n/a
Aug
46.1 C (115.0 F)
7.8 C (46.0 F)
n/a
n/a
Sep
42.2 C (108.0 F)
-1.7 C (28.9 F)
n/a
n/a
Oct
37.8 C (100.0 F)
-11.1 C (12.0 F)
n/a
n/a
Nov
33.3 C (91.9 F)
-15.0 C (5.0 F)
n/a
n/a
Dec
30.0 C (86.0 F)
-22.8 C (-9.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Hammon 3 SSW still stand. 1952 holds the most, with 39.
Standing records at Hammon 3 SSW by the year they were set
Year set
Standing records
1920
18
1921
22
1922
24
1923
19
1924
29
1925
22
1926
12
1927
31
1928
27
1929
18
1930
26
1931
26
1932
21
1933
10
1934
26
1940
15
1941
8
1942
13
1943
21
1944
12
1945
19
1946
17
1947
20
1948
17
1949
10
1950
27
1951
31
1952
39
1953
32
1954
30
1955
25
1956
34
1957
12
1958
5
1959
16
1960
20
1961
17
1962
21
1963
17
1964
6
1965
17
1966
29
1967
21
1968
9
1969
7
1970
19
1971
18
1972
14
1973
10
1974
12
1975
11
1976
10
1977
7
1978
18
1979
18
1980
18
1981
20
1982
15
1983
30
1984
12
1985
15
1986
13
1987
13
1988
13
1989
34
1990
16
1991
14
1992
21
1993
17
1994
10
1995
22
1996
28
1997
14
1998
11
1999
8
2000
19
2001
8
2002
13
2003
13
2004
23
2005
9
All-Time Record Progression
8 new records
8 all-time records were set at Hammon 3 SSW between 26 May 1959 and 23 December 1990. Each dot is a new record.
When Hammon 3 SSW set new all-time records
Date
Kind
Detail
1959-05-26
Record daily precipitation
Record daily precipitation 127.0 mm (5.0 in)
1969-08-26
Record daily precipitation
Record daily precipitation 147.1 mm (5.8 in)
1971-02-21
Record daily snowfall
Record daily snowfall 27.9 cm (11.0 in)
1983-06-11
Record daily precipitation
Record daily precipitation 190.5 mm (7.5 in)
1987-12-14
Record snow depth
Record snow depth 35.6 cm (14.0 in)
1988-01-08
Record snow depth
Record snow depth 40.6 cm (16.0 in)
1990-12-22
Record low maximum temperature
Record low maximum temperature -13.9 C (7.0 F)
1990-12-23
Record low maximum temperature
Record low maximum temperature -15.0 C (5.0 F)
Wettest Day of Each Month
Jun: 190.5 mm (7.5 in)
The wettest day on record for each calendar month at Hammon 3 SSW. The most was 190.5 mm (7.5 in) on 11 June 1983.
Record daily precipitation for each month at Hammon 3 SSW
Month
Record daily precipitation (mm)
Date
Jan
63.8 mm (2.5 in)
4 January 2005
Feb
62.2 mm (2.4 in)
27 February 1948
Mar
99.1 mm (3.9 in)
28 March 1989
Apr
81.3 mm (3.2 in)
4 April 1997
May
127.0 mm (5.0 in)
26 May 1959
Jun
190.5 mm (7.5 in)
11 June 1983
Jul
135.9 mm (5.4 in)
24 July 1975
Aug
147.1 mm (5.8 in)
26 August 1969
Sep
166.6 mm (6.6 in)
23 September 1997
Oct
108.0 mm (4.3 in)
3 October 1986
Nov
82.0 mm (3.2 in)
20 November 1994
Dec
54.4 mm (2.1 in)
17 December 1959
Period of Record Coverage
1920 to 2005
Complete yearUnder 90 percent of days
81 years of record at Hammon 3 SSW, 1920 to 2005. 10 years have data for under 90 percent of days and are left out of rankings: 1933, 1934, 1942, 1953, 1969, 1970, 1973, 1974 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 61 complete years at Hammon 3 SSW, 1920 to 2004. Blue stripes are years cooler than the station's own mean of 15.0 C (58.9 F); red stripes are warmer. The coolest year was 1979, at 12.9 C (55.2 F), and the warmest was 1954, at 17.4 C (63.3 F). The strongest colour marks a difference of 2.5 C (4.5 F).
Annual mean temperature at Hammon 3 SSW as warming stripes, 1920 to 2004
Year
Annual mean temperature
Difference from the station mean
1920
14.5 C
-0.43 C
1921
16.3 C
+1.36 C
1922
16.0 C
+1.02 C
1923
15.6 C
+0.64 C
1924
14.6 C
-0.41 C
1925
16.1 C
+1.12 C
1926
15.2 C
+0.24 C
1927
15.9 C
+0.90 C
1928
15.9 C
+0.95 C
1929
14.8 C
-0.12 C
1930
15.9 C
+0.95 C
1931
16.6 C
+1.62 C
1932
15.6 C
+0.66 C
1944
15.4 C
+0.41 C
1945
15.1 C
+0.14 C
1946
16.4 C
+1.42 C
1948
14.7 C
-0.24 C
1949
14.7 C
-0.28 C
1950
15.4 C
+0.47 C
1951
15.3 C
+0.32 C
1952
17.0 C
+2.02 C
1954
17.4 C
+2.45 C
1955
16.0 C
+1.07 C
1956
16.8 C
+1.81 C
1957
14.8 C
-0.13 C
1958
15.1 C
+0.16 C
1959
14.8 C
-0.21 C
1960
14.6 C
-0.37 C
1961
14.9 C
-0.09 C
1962
15.5 C
+0.55 C
1965
15.0 C
+0.08 C
1968
14.8 C
-0.14 C
1971
16.0 C
+1.02 C
1972
15.9 C
+0.93 C
1976
14.5 C
-0.45 C
1977
15.4 C
+0.48 C
1978
14.0 C
-0.95 C
1979
12.9 C
-2.08 C
1980
15.1 C
+0.09 C
1981
15.3 C
+0.31 C
1982
13.6 C
-1.36 C
1983
13.6 C
-1.37 C
1984
14.1 C
-0.88 C
1985
14.1 C
-0.89 C
1986
15.0 C
+0.04 C
1987
13.8 C
-1.15 C
1988
13.7 C
-1.24 C
1989
13.3 C
-1.63 C
1990
14.7 C
-0.30 C
1991
14.6 C
-0.41 C
1992
14.1 C
-0.88 C
1993
13.2 C
-1.79 C
1994
14.3 C
-0.62 C
1995
13.7 C
-1.22 C
1997
13.6 C
-1.38 C
1999
15.0 C
0.00 C
2000
14.3 C
-0.66 C
2001
15.0 C
-0.01 C
2002
14.2 C
-0.75 C
2003
14.5 C
-0.44 C
2004
14.8 C
-0.18 C
The annual mean temperature here has fallen by 0.2 C (0.1 to 0.3) per decade over 1920 to 2004. In Fahrenheit: 0.4 F (0.3 to 0.5) per decade. The slope is a straight line fitted to 61 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Hammon 3 SSW
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.2 C (-0.3 to -0.1) per decade
-0.4 F (-0.5 to -0.3) per decade
1920 to 2004
61
Fall
Mean daily maximum
-0.2 C (-0.3 to -0.1) per decade
-0.4 F (-0.6 to -0.2) per decade
1920 to 2004
61
Fall
Mean daily minimum
-0.2 C (-0.3 to -0.1) per decade
-0.4 F (-0.5 to -0.2) per decade
1920 to 2004
61
Fall
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
1920 to 2005
Yearly extremes at Hammon 3 SSW: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
46.1 C (115.0 F)
1951
41.1 C (106.0 F)
81
Coldest night (TNn)
-27.8 C (-18.0 F)
1947
-17.2 C (1.0 F)
81
Wettest day (Rx1day)
190.5 mm (7.5 in)
1983
66.0 mm (2.6 in)
81
Wettest five days (Rx5day)
200.7 mm (7.9 in)
1986
89.2 mm (3.5 in)
81
Longest dry spell (CDD)
98 days
1921
39 days
81
Hottest day (TXx)
The hottest day of the year at Hammon 3 SSW, 1920 to 2005. The record is 46.1 C (115.0 F) in 1951, marked on the chart; the median year is 41.1 C (106.0 F).
Hottest day (TXx) at Hammon 3 SSW by year
Year
Hottest day (TXx)
1920
40.0 C (104.0 F)
1921
40.6 C (105.1 F)
1922
44.4 C (111.9 F)
1923
42.2 C (108.0 F)
1924
45.0 C (113.0 F)
1925
43.3 C (109.9 F)
1926
41.7 C (107.1 F)
1927
42.2 C (108.0 F)
1928
41.1 C (106.0 F)
1929
43.3 C (109.9 F)
1930
42.8 C (109.0 F)
1931
40.0 C (104.0 F)
1932
41.1 C (106.0 F)
1933
41.7 C (107.1 F)
1934
43.3 C (109.9 F)
1940
42.8 C (109.0 F)
1941
41.7 C (107.1 F)
1942
38.9 C (102.0 F)
1943
43.9 C (111.0 F)
1944
40.6 C (105.1 F)
1945
41.1 C (106.0 F)
1946
43.3 C (109.9 F)
1947
42.2 C (108.0 F)
1948
41.7 C (107.1 F)
1949
41.1 C (106.0 F)
1950
41.7 C (107.1 F)
1951
46.1 C (115.0 F)
1952
42.8 C (109.0 F)
1953
44.4 C (111.9 F)
1954
43.9 C (111.0 F)
1955
40.0 C (104.0 F)
1956
42.8 C (109.0 F)
1957
41.1 C (106.0 F)
1958
42.8 C (109.0 F)
1959
39.4 C (102.9 F)
1960
40.0 C (104.0 F)
1961
39.4 C (102.9 F)
1962
40.0 C (104.0 F)
1963
41.1 C (106.0 F)
1964
43.9 C (111.0 F)
1965
38.9 C (102.0 F)
1966
40.6 C (105.1 F)
1967
41.1 C (106.0 F)
1968
40.0 C (104.0 F)
1969
43.9 C (111.0 F)
1970
43.3 C (109.9 F)
1971
41.7 C (107.1 F)
1972
38.9 C (102.0 F)
1973
40.0 C (104.0 F)
1974
42.2 C (108.0 F)
1975
37.8 C (100.0 F)
1976
41.7 C (107.1 F)
1977
42.2 C (108.0 F)
1978
43.3 C (109.9 F)
1979
38.3 C (100.9 F)
1980
46.1 C (115.0 F)
1981
43.3 C (109.9 F)
1982
39.4 C (102.9 F)
1983
40.6 C (105.1 F)
1984
41.1 C (106.0 F)
1985
41.1 C (106.0 F)
1986
43.3 C (109.9 F)
1987
38.3 C (100.9 F)
1988
43.3 C (109.9 F)
1989
40.0 C (104.0 F)
1990
40.0 C (104.0 F)
1991
40.6 C (105.1 F)
1992
38.3 C (100.9 F)
1993
38.9 C (102.0 F)
1994
41.7 C (107.1 F)
1995
39.4 C (102.9 F)
1996
43.3 C (109.9 F)
1997
37.2 C (99.0 F)
1998
41.7 C (107.1 F)
1999
40.6 C (105.1 F)
2000
41.1 C (106.0 F)
2001
41.7 C (107.1 F)
2002
38.9 C (102.0 F)
2003
41.1 C (106.0 F)
2004
38.3 C (100.9 F)
2005
37.8 C (100.0 F)
Coldest night (TNn)
The coldest night of the year at Hammon 3 SSW, 1920 to 2005. The record is -27.8 C (-18.0 F) in 1947, marked on the chart; the median year is -17.2 C (1.0 F).
Coldest night (TNn) at Hammon 3 SSW by year
Year
Coldest night (TNn)
1920
-17.2 C (1.0 F)
1921
-16.1 C (3.0 F)
1922
-17.2 C (1.0 F)
1923
-15.6 C (3.9 F)
1924
-19.4 C (-2.9 F)
1925
-15.6 C (3.9 F)
1926
-16.1 C (3.0 F)
1927
-18.3 C (-0.9 F)
1928
-18.3 C (-0.9 F)
1929
-22.8 C (-9.0 F)
1930
-25.0 C (-13.0 F)
1931
-11.1 C (12.0 F)
1932
-21.1 C (-6.0 F)
1933
-22.2 C (-8.0 F)
1934
-12.2 C (10.0 F)
1940
-17.8 C (0.0 F)
1941
-8.9 C (16.0 F)
1942
-26.1 C (-15.0 F)
1943
-21.1 C (-6.0 F)
1944
-16.7 C (1.9 F)
1945
-15.6 C (3.9 F)
1946
-15.0 C (5.0 F)
1947
-27.8 C (-18.0 F)
1948
-20.0 C (-4.0 F)
1949
-20.0 C (-4.0 F)
1950
-18.9 C (-2.0 F)
1951
-21.1 C (-6.0 F)
1952
-11.1 C (12.0 F)
1953
-15.0 C (5.0 F)
1954
-15.6 C (3.9 F)
1955
-13.3 C (8.1 F)
1956
-13.9 C (7.0 F)
1957
-13.3 C (8.1 F)
1958
-16.1 C (3.0 F)
1959
-22.8 C (-9.0 F)
1960
-18.9 C (-2.0 F)
1961
-17.2 C (1.0 F)
1962
-21.1 C (-6.0 F)
1963
-21.7 C (-7.1 F)
1964
-17.8 C (0.0 F)
1965
-17.2 C (1.0 F)
1966
-23.9 C (-11.0 F)
1967
-16.1 C (3.0 F)
1968
-17.2 C (1.0 F)
1969
-15.6 C (3.9 F)
1970
-15.6 C (3.9 F)
1971
-16.7 C (1.9 F)
1972
-20.6 C (-5.1 F)
1973
-22.8 C (-9.0 F)
1974
-11.1 C (12.0 F)
1975
-14.4 C (6.1 F)
1976
-17.2 C (1.0 F)
1977
-18.3 C (-0.9 F)
1978
-17.8 C (0.0 F)
1979
-20.0 C (-4.0 F)
1980
-18.9 C (-2.0 F)
1981
-20.0 C (-4.0 F)
1982
-18.3 C (-0.9 F)
1983
-20.0 C (-4.0 F)
1984
-24.4 C (-11.9 F)
1985
-18.3 C (-0.9 F)
1986
-18.3 C (-0.9 F)
1987
-17.8 C (0.0 F)
1988
-26.1 C (-15.0 F)
1989
-22.8 C (-9.0 F)
1990
-18.9 C (-2.0 F)
1991
-15.0 C (5.0 F)
1992
-10.6 C (12.9 F)
1993
-14.4 C (6.1 F)
1994
-17.8 C (0.0 F)
1995
-14.4 C (6.1 F)
1996
-26.7 C (-16.1 F)
1997
-14.4 C (6.1 F)
1998
-16.7 C (1.9 F)
1999
-13.3 C (8.1 F)
2000
-16.7 C (1.9 F)
2001
-13.9 C (7.0 F)
2002
-16.7 C (1.9 F)
2003
-14.4 C (6.1 F)
2004
-18.3 C (-0.9 F)
2005
-12.2 C (10.0 F)
Wettest day (Rx1day)
The wettest day of the year at Hammon 3 SSW, 1920 to 2005. The record is 190.5 mm (7.5 in) in 1983, marked on the chart; the median year is 66.0 mm (2.6 in).
Wettest day (Rx1day) at Hammon 3 SSW by year
Year
Wettest day (Rx1day)
1920
82.0 mm (3.2 in)
1921
39.1 mm (1.5 in)
1922
71.9 mm (2.8 in)
1923
102.4 mm (4.0 in)
1924
39.9 mm (1.6 in)
1925
57.7 mm (2.3 in)
1926
65.3 mm (2.6 in)
1927
66.0 mm (2.6 in)
1928
66.0 mm (2.6 in)
1929
87.6 mm (3.4 in)
1930
100.3 mm (3.9 in)
1931
40.4 mm (1.6 in)
1932
41.4 mm (1.6 in)
1933
15.2 mm (0.6 in)
1934
90.2 mm (3.6 in)
1940
39.4 mm (1.6 in)
1941
68.6 mm (2.7 in)
1942
81.8 mm (3.2 in)
1943
74.4 mm (2.9 in)
1944
37.6 mm (1.5 in)
1945
51.8 mm (2.0 in)
1946
71.1 mm (2.8 in)
1947
37.6 mm (1.5 in)
1948
82.0 mm (3.2 in)
1949
43.4 mm (1.7 in)
1950
81.3 mm (3.2 in)
1951
68.6 mm (2.7 in)
1952
34.3 mm (1.4 in)
1953
43.2 mm (1.7 in)
1954
81.3 mm (3.2 in)
1955
37.6 mm (1.5 in)
1956
58.9 mm (2.3 in)
1957
72.9 mm (2.9 in)
1958
49.5 mm (1.9 in)
1959
127.0 mm (5.0 in)
1960
63.5 mm (2.5 in)
1961
48.3 mm (1.9 in)
1962
48.3 mm (1.9 in)
1963
37.6 mm (1.5 in)
1964
72.4 mm (2.9 in)
1965
100.3 mm (3.9 in)
1966
26.4 mm (1.0 in)
1967
56.4 mm (2.2 in)
1968
83.8 mm (3.3 in)
1969
147.1 mm (5.8 in)
1970
64.8 mm (2.6 in)
1971
48.3 mm (1.9 in)
1972
35.6 mm (1.4 in)
1973
66.8 mm (2.6 in)
1974
49.3 mm (1.9 in)
1975
135.9 mm (5.4 in)
1976
43.2 mm (1.7 in)
1977
46.7 mm (1.8 in)
1978
55.1 mm (2.2 in)
1979
64.3 mm (2.5 in)
1980
77.0 mm (3.0 in)
1981
59.7 mm (2.4 in)
1982
124.5 mm (4.9 in)
1983
190.5 mm (7.5 in)
1984
47.8 mm (1.9 in)
1985
69.9 mm (2.8 in)
1986
108.0 mm (4.3 in)
1987
89.7 mm (3.5 in)
1988
77.5 mm (3.1 in)
1989
99.1 mm (3.9 in)
1990
94.2 mm (3.7 in)
1991
69.1 mm (2.7 in)
1992
56.6 mm (2.2 in)
1993
32.0 mm (1.3 in)
1994
82.0 mm (3.2 in)
1995
109.7 mm (4.3 in)
1996
78.7 mm (3.1 in)
1997
166.6 mm (6.6 in)
1998
88.6 mm (3.5 in)
1999
59.2 mm (2.3 in)
2000
49.8 mm (2.0 in)
2001
99.8 mm (3.9 in)
2002
36.1 mm (1.4 in)
2003
80.0 mm (3.1 in)
2004
65.5 mm (2.6 in)
2005
63.8 mm (2.5 in)
Wettest five days (Rx5day)
The wettest five days of the year at Hammon 3 SSW, 1920 to 2005. The record is 200.7 mm (7.9 in) in 1986, marked on the chart; the median year is 89.2 mm (3.5 in).
Wettest five days (Rx5day) at Hammon 3 SSW by year
Year
Wettest five days (Rx5day)
1920
139.7 mm (5.5 in)
1921
68.6 mm (2.7 in)
1922
108.3 mm (4.3 in)
1923
195.6 mm (7.7 in)
1924
49.1 mm (1.9 in)
1925
78.3 mm (3.1 in)
1926
107.2 mm (4.2 in)
1927
76.6 mm (3.0 in)
1928
110.5 mm (4.4 in)
1929
118.4 mm (4.7 in)
1930
83.3 mm (3.3 in)
1931
53.8 mm (2.1 in)
1932
62.7 mm (2.5 in)
1933
22.4 mm (0.9 in)
1934
95.3 mm (3.8 in)
1940
64.2 mm (2.5 in)
1941
82.8 mm (3.3 in)
1942
103.4 mm (4.1 in)
1943
82.3 mm (3.2 in)
1944
86.1 mm (3.4 in)
1945
65.0 mm (2.6 in)
1946
104.9 mm (4.1 in)
1947
73.2 mm (2.9 in)
1948
90.9 mm (3.6 in)
1949
80.5 mm (3.2 in)
1950
136.2 mm (5.4 in)
1951
101.7 mm (4.0 in)
1952
45.5 mm (1.8 in)
1953
65.0 mm (2.6 in)
1954
132.4 mm (5.2 in)
1955
81.3 mm (3.2 in)
1956
84.1 mm (3.3 in)
1957
109.0 mm (4.3 in)
1958
104.6 mm (4.1 in)
1959
149.4 mm (5.9 in)
1960
78.8 mm (3.1 in)
1961
98.5 mm (3.9 in)
1962
90.2 mm (3.6 in)
1963
81.0 mm (3.2 in)
1964
154.5 mm (6.1 in)
1965
133.4 mm (5.3 in)
1966
47.2 mm (1.9 in)
1967
71.9 mm (2.8 in)
1968
139.1 mm (5.5 in)
1969
162.8 mm (6.4 in)
1970
128.8 mm (5.1 in)
1971
89.2 mm (3.5 in)
1972
37.2 mm (1.5 in)
1973
90.2 mm (3.6 in)
1974
94.3 mm (3.7 in)
1975
148.6 mm (5.9 in)
1976
71.1 mm (2.8 in)
1977
62.0 mm (2.4 in)
1978
150.8 mm (5.9 in)
1979
81.7 mm (3.2 in)
1980
129.8 mm (5.1 in)
1981
81.3 mm (3.2 in)
1982
186.8 mm (7.4 in)
1983
199.6 mm (7.9 in)
1984
88.4 mm (3.5 in)
1985
89.0 mm (3.5 in)
1986
200.7 mm (7.9 in)
1987
150.6 mm (5.9 in)
1988
80.0 mm (3.1 in)
1989
136.4 mm (5.4 in)
1990
95.0 mm (3.7 in)
1991
77.4 mm (3.0 in)
1992
102.6 mm (4.0 in)
1993
74.9 mm (2.9 in)
1994
97.2 mm (3.8 in)
1995
185.4 mm (7.3 in)
1996
141.4 mm (5.6 in)
1997
177.8 mm (7.0 in)
1998
179.3 mm (7.1 in)
1999
80.8 mm (3.2 in)
2000
65.0 mm (2.6 in)
2001
61.3 mm (2.4 in)
2002
86.6 mm (3.4 in)
2003
80.0 mm (3.1 in)
2004
79.4 mm (3.1 in)
2005
79.7 mm (3.1 in)
Longest dry spell (CDD)
The longest dry spell of the year at Hammon 3 SSW, 1920 to 2005. The record is 98 days in 1921, marked on the chart; the median year is 39 days.
Longest dry spell (CDD) at Hammon 3 SSW by year
Year
Longest dry spell (CDD)
1920
42 days
1921
98 days
1922
26 days
1923
31 days
1924
40 days
1925
28 days
1926
34 days
1927
43 days
1928
36 days
1929
46 days
1930
52 days
1931
22 days
1932
43 days
1933
35 days
1934
50 days
1940
36 days
1941
21 days
1942
47 days
1943
48 days
1944
30 days
1945
52 days
1946
34 days
1947
51 days
1948
42 days
1949
39 days
1950
91 days
1951
36 days
1952
47 days
1953
43 days
1954
64 days
1955
87 days
1956
45 days
1957
35 days
1958
21 days
1959
39 days
1960
38 days
1961
27 days
1962
42 days
1963
37 days
1964
40 days
1965
31 days
1966
39 days
1967
36 days
1968
23 days
1969
34 days
1970
31 days
1971
48 days
1972
40 days
1973
26 days
1974
40 days
1975
33 days
1976
48 days
1977
35 days
1978
35 days
1979
40 days
1980
67 days
1981
20 days
1982
42 days
1983
39 days
1984
22 days
1985
30 days
1986
38 days
1987
20 days
1988
43 days
1989
61 days
1990
36 days
1991
60 days
1992
53 days
1993
27 days
1994
32 days
1995
75 days
1996
57 days
1997
36 days
1998
40 days
1999
34 days
2000
83 days
2001
42 days
2002
30 days
2003
36 days
2004
35 days
2005
47 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
61 years with a frost
Across 61 years with a frost, the median last spring frost at Hammon 3 SSW falls on 15 April and the median first autumn frost on 23 October, which leaves a median of 193 days between them.
In 1968 to 2004 the median growing season was 191 days. That is 4 days fewer than in 1920 to 1962.
Fitted over all years, the growing season changes by -1.5 days per decade at this station.
Frost dates and growing season at Hammon 3 SSW
Measure
Median, all years
Earliest period (1920 to 1962)
Recent period (1968 to 2004)
Recent against earliest
Fitted trend
Last spring frost
15 April
15 April
13 April
2 days earlier
0.0 days per decade
First autumn frost
23 October
26 October
20 October
6 days earlier
-1.4 days per decade
Growing days
193 days
195 days
191 days
4 days fewer
-1.5 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
74 years, 1920 to 2005
A day with at least 64.6 mm (2.5 in) of rain is expected about once in 2 years. A day with at least 180.2 mm (7.1 in) of rain is expected about once in 100 years.
Rainfall return levels at Hammon 3 SSW: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
64.6 mm (2.5 in)
5 years
91.4 mm (3.6 in)
10 years
110.7 mm (4.4 in)
25 years
137.0 mm (5.4 in)
50 years
158.0 mm (6.2 in)
100 years
180.2 mm (7.1 in)
Longer than the 74 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, 74 years of values from 1920 to 2005.
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: 190.5 mm (7.5 in) in 1983; 166.6 mm (6.6 in) in 1997; 147.1 mm (5.8 in) in 1969.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Hammon 3 SSW, at 1976. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1976 ran 0.4 C (0.7 F) lower than in the years before (likely change).
Suspected changes in the annual mean temperature at Hammon 3 SSW, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1976
-0.4
-0.7
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 Hammon 3 SSW standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Hammon 3 SSW 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.