Record envelope, standing records and threshold days for Armour (USC00390296), South Dakota, United States, with 113 years of record.
Key Facts for Armour
Armour (USC00390296) is a weather station in South Dakota, United States at 43.31 latitude and -98.35 longitude, 460 m (1,510 ft) above sea level.
The station reports from 1896 to 2008, 113 years of record.
1,464 records set at Armour still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Armour set a daily record precipitation of 56.1 mm (2.2 in) on 2 May 2008.
About the Station
Location: South Dakota, United States, 43.31 latitude, -98.35 longitude.
Elevation: 460 m (1,510 ft).
Period of record: 1896 to 2008, 113 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 Armour. 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 Armour, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
21.1 C (70.0 F)
-42.8 C (-45.0 F)
n/a
n/a
Feb
23.9 C (75.0 F)
-42.8 C (-45.0 F)
n/a
n/a
Mar
34.4 C (93.9 F)
-29.4 C (-20.9 F)
n/a
n/a
Apr
36.7 C (98.1 F)
-18.9 C (-2.0 F)
n/a
n/a
May
40.6 C (105.1 F)
-8.3 C (17.1 F)
n/a
n/a
Jun
43.3 C (109.9 F)
-1.1 C (30.0 F)
n/a
n/a
Jul
46.7 C (116.1 F)
3.9 C (39.0 F)
n/a
n/a
Aug
44.4 C (111.9 F)
1.7 C (35.1 F)
n/a
n/a
Sep
42.8 C (109.0 F)
-8.3 C (17.1 F)
n/a
n/a
Oct
37.2 C (99.0 F)
-20.0 C (-4.0 F)
n/a
n/a
Nov
28.3 C (82.9 F)
-27.8 C (-18.0 F)
n/a
n/a
Dec
22.2 C (72.0 F)
-39.4 C (-38.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Armour still stand. 1936 holds the most, with 48.
Standing records at Armour by the year they were set
Year set
Standing records
1896
14
1897
20
1898
4
1899
29
1900
14
1901
7
1902
23
1903
13
1904
14
1905
18
1906
10
1907
17
1908
11
1909
10
1910
9
1911
9
1912
14
1913
18
1914
10
1915
16
1916
15
1917
24
1918
23
1919
16
1920
7
1921
16
1922
7
1923
19
1924
17
1925
12
1926
22
1927
11
1928
14
1929
13
1930
29
1931
42
1932
7
1933
19
1934
27
1935
16
1936
48
1937
27
1938
19
1939
26
1940
21
1941
20
1942
5
1943
10
1944
4
1945
9
1946
11
1947
10
1948
11
1949
8
1950
15
1951
14
1952
5
1953
12
1954
11
1955
15
1956
10
1957
6
1958
11
1959
14
1960
10
1962
16
1963
9
1964
10
1965
14
1966
13
1967
14
1968
11
1969
10
1970
12
1971
8
1972
13
1973
4
1974
14
1975
2
1976
5
1977
6
1978
5
1979
6
1980
3
1981
11
1982
3
1983
13
1984
6
1985
19
1986
7
1987
13
1988
20
1989
21
1990
18
1991
20
1992
12
1993
2
1994
5
1995
12
1996
12
1997
11
1998
13
1999
12
2000
21
2001
5
2002
13
2003
7
2004
17
2005
4
2007
4
All-Time Record Progression
10 new records
10 all-time records were set at Armour between 2 August 1930 and 20 January 1988. Each dot is a new record.
When Armour set new all-time records
Date
Kind
Detail
1930-08-02
Record high maximum temperature
Record high maximum temperature 44.4 C (111.9 F)
1934-07-22
Record high minimum temperature
Record high minimum temperature 30.6 C (87.1 F)
1936-07-04
Record high maximum temperature
Record high maximum temperature 45.0 C (113.0 F)
1937-08-18
Record daily precipitation
Record daily precipitation 138.7 mm (5.5 in)
1940-07-24
Record high maximum temperature
Record high maximum temperature 46.7 C (116.1 F)
1949-01-03
Record snow depth
Record snow depth 55.9 cm (22.0 in)
1949-01-04
Record snow depth
Record snow depth 63.5 cm (25.0 in)
1983-12-27
Record snow depth
Record snow depth 66.0 cm (26.0 in)
1988-01-19
Record daily snowfall
Record daily snowfall 45.7 cm (18.0 in)
1988-01-20
Record snow depth
Record snow depth 71.1 cm (28.0 in)
Wettest Day of Each Month
Aug: 138.7 mm (5.5 in)
The wettest day on record for each calendar month at Armour. The most was 138.7 mm (5.5 in) on 18 August 1937.
Record daily precipitation for each month at Armour
Month
Record daily precipitation (mm)
Date
Jan
45.7 mm (1.8 in)
19 January 1988
Feb
35.1 mm (1.4 in)
20 February 1969
Mar
84.1 mm (3.3 in)
17 March 1987
Apr
59.4 mm (2.3 in)
18 April 1995
May
64.8 mm (2.6 in)
18 May 1897
Jun
115.6 mm (4.6 in)
10 June 1986
Jul
86.4 mm (3.4 in)
21 July 1978
Aug
138.7 mm (5.5 in)
18 August 1937
Sep
112.8 mm (4.4 in)
20 September 1950
Oct
104.1 mm (4.1 in)
5 October 1911
Nov
48.5 mm (1.9 in)
1 November 2000
Dec
76.2 mm (3.0 in)
2 December 2005
Period of Record Coverage
1896 to 2008
Complete yearUnder 90 percent of days
113 years of record at Armour, 1896 to 2008. 21 years have data for under 90 percent of days and are left out of rankings: 1896, 1897, 1898, 1901, 1909, 1910, 1911, 1912 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 86 complete years at Armour, 1899 to 2003. Blue stripes are years cooler than the station's own mean of 9.0 C (48.2 F); red stripes are warmer. The coolest year was 1950, at 6.6 C (43.8 F), and the warmest was 1939, at 11.9 C (53.4 F). The strongest colour marks a difference of 2.9 C (5.2 F).
Annual mean temperature at Armour as warming stripes, 1899 to 2003
Year
Annual mean temperature
Difference from the station mean
1899
7.0 C
-1.99 C
1900
9.3 C
+0.26 C
1902
7.3 C
-1.72 C
1903
7.2 C
-1.77 C
1904
8.4 C
-0.60 C
1905
8.7 C
-0.36 C
1906
8.2 C
-0.83 C
1907
8.1 C
-0.94 C
1908
9.0 C
+0.02 C
1917
7.1 C
-1.92 C
1918
8.8 C
-0.17 C
1919
8.0 C
-1.03 C
1921
10.2 C
+1.22 C
1922
8.9 C
-0.16 C
1923
9.2 C
+0.20 C
1924
7.4 C
-1.62 C
1925
9.3 C
+0.28 C
1927
8.3 C
-0.70 C
1930
10.2 C
+1.22 C
1932
9.3 C
+0.30 C
1933
10.6 C
+1.60 C
1934
10.9 C
+1.91 C
1935
9.1 C
+0.06 C
1936
8.9 C
-0.14 C
1937
8.9 C
-0.14 C
1938
11.3 C
+2.27 C
1939
11.9 C
+2.87 C
1940
10.0 C
+0.95 C
1941
11.1 C
+2.09 C
1942
9.4 C
+0.41 C
1943
9.4 C
+0.35 C
1944
9.1 C
+0.08 C
1945
8.8 C
-0.18 C
1946
9.8 C
+0.82 C
1947
9.1 C
+0.13 C
1948
9.0 C
-0.01 C
1949
8.7 C
-0.32 C
1950
6.6 C
-2.44 C
1951
6.7 C
-2.34 C
1952
9.0 C
+0.02 C
1953
9.6 C
+0.58 C
1954
9.5 C
+0.52 C
1955
9.0 C
+0.02 C
1956
8.8 C
-0.23 C
1957
8.7 C
-0.34 C
1958
9.0 C
-0.05 C
1959
8.9 C
-0.07 C
1960
7.9 C
-1.13 C
1961
8.7 C
-0.33 C
1962
8.5 C
-0.50 C
1963
10.0 C
+0.94 C
1964
9.1 C
+0.13 C
1965
8.6 C
-0.42 C
1966
8.4 C
-0.61 C
1967
8.8 C
-0.20 C
1968
9.2 C
+0.16 C
1970
8.5 C
-0.50 C
1971
8.7 C
-0.35 C
1972
7.6 C
-1.43 C
1973
9.7 C
+0.64 C
1976
9.7 C
+0.69 C
1977
9.6 C
+0.56 C
1978
7.4 C
-1.57 C
1979
7.3 C
-1.67 C
1982
8.3 C
-0.70 C
1983
8.7 C
-0.33 C
1984
8.8 C
-0.17 C
1985
7.7 C
-1.32 C
1986
9.8 C
+0.79 C
1987
11.3 C
+2.28 C
1988
9.7 C
+0.67 C
1989
9.0 C
-0.01 C
1990
10.4 C
+1.38 C
1991
10.2 C
+1.21 C
1992
9.3 C
+0.24 C
1993
7.8 C
-1.17 C
1994
9.0 C
-0.03 C
1995
9.0 C
0.00 C
1996
7.4 C
-1.57 C
1997
9.1 C
+0.08 C
1998
10.5 C
+1.49 C
1999
10.7 C
+1.69 C
2000
9.8 C
+0.79 C
2001
9.6 C
+0.60 C
2002
10.2 C
+1.17 C
2003
9.5 C
+0.47 C
The fitted trend in annual mean temperature here over 1899 to 2003 is 0.07 C (0.00 to 0.15) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.13 F (-0.01 to 0.27) per decade. The slope is a straight line fitted to 86 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Armour
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.07 C (0.00 to 0.15) per decade
0.13 F (-0.01 to 0.27) per decade
1899 to 2003
86
Not clearly different from zero
Mean daily maximum
-0.05 C (-0.14 to 0.04) per decade
-0.1 F (-0.3 to 0.1) per decade
1899 to 2003
86
Not clearly different from zero
Mean daily minimum
0.2 C (0.1 to 0.3) per decade
0.4 F (0.2 to 0.5) per decade
1899 to 2003
86
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
1896 to 2008
Yearly extremes at Armour: 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)
1940
39.4 C (102.9 F)
113
Coldest night (TNn)
-42.8 C (-45.0 F)
1905
-30.0 C (-22.0 F)
113
Wettest day (Rx1day)
138.7 mm (5.5 in)
1937
50.8 mm (2.0 in)
113
Wettest five days (Rx5day)
158.0 mm (6.2 in)
1937
71.7 mm (2.8 in)
113
Longest dry spell (CDD)
77 days
1962
33 days
113
Hottest day (TXx)
The hottest day of the year at Armour, 1896 to 2008. The record is 46.7 C (116.1 F) in 1940, marked on the chart; the median year is 39.4 C (102.9 F).
Hottest day (TXx) at Armour by year
Year
Hottest day (TXx)
1896
38.9 C (102.0 F)
1897
38.3 C (100.9 F)
1898
38.9 C (102.0 F)
1899
38.9 C (102.0 F)
1900
37.2 C (99.0 F)
1901
41.7 C (107.1 F)
1902
38.9 C (102.0 F)
1903
38.3 C (100.9 F)
1904
42.8 C (109.0 F)
1905
40.0 C (104.0 F)
1906
38.3 C (100.9 F)
1907
38.9 C (102.0 F)
1908
40.0 C (104.0 F)
1909
39.4 C (102.9 F)
1910
39.4 C (102.9 F)
1911
42.8 C (109.0 F)
1912
37.2 C (99.0 F)
1913
41.1 C (106.0 F)
1914
41.7 C (107.1 F)
1915
33.9 C (93.0 F)
1916
40.0 C (104.0 F)
1917
41.7 C (107.1 F)
1918
37.8 C (100.0 F)
1919
41.1 C (106.0 F)
1920
35.6 C (96.1 F)
1921
39.4 C (102.9 F)
1922
38.3 C (100.9 F)
1923
38.3 C (100.9 F)
1924
36.1 C (97.0 F)
1925
40.0 C (104.0 F)
1926
42.8 C (109.0 F)
1927
38.3 C (100.9 F)
1928
41.7 C (107.1 F)
1929
40.6 C (105.1 F)
1930
44.4 C (111.9 F)
1931
43.3 C (109.9 F)
1932
41.1 C (106.0 F)
1933
41.7 C (107.1 F)
1934
43.9 C (111.0 F)
1935
41.7 C (107.1 F)
1936
45.0 C (113.0 F)
1937
43.9 C (111.0 F)
1938
42.8 C (109.0 F)
1939
44.4 C (111.9 F)
1940
46.7 C (116.1 F)
1941
43.3 C (109.9 F)
1942
40.6 C (105.1 F)
1943
41.1 C (106.0 F)
1944
37.8 C (100.0 F)
1945
38.9 C (102.0 F)
1946
38.3 C (100.9 F)
1947
43.3 C (109.9 F)
1948
40.0 C (104.0 F)
1949
38.9 C (102.0 F)
1950
35.6 C (96.1 F)
1951
36.1 C (97.0 F)
1952
40.0 C (104.0 F)
1953
38.9 C (102.0 F)
1954
43.3 C (109.9 F)
1955
40.6 C (105.1 F)
1956
39.4 C (102.9 F)
1957
38.9 C (102.0 F)
1958
37.8 C (100.0 F)
1959
38.9 C (102.0 F)
1960
39.4 C (102.9 F)
1961
39.4 C (102.9 F)
1962
36.7 C (98.1 F)
1963
40.0 C (104.0 F)
1964
40.6 C (105.1 F)
1965
41.1 C (106.0 F)
1966
40.6 C (105.1 F)
1967
41.1 C (106.0 F)
1968
40.0 C (104.0 F)
1969
37.8 C (100.0 F)
1970
40.0 C (104.0 F)
1971
40.0 C (104.0 F)
1972
36.7 C (98.1 F)
1973
40.0 C (104.0 F)
1974
40.0 C (104.0 F)
1975
38.9 C (102.0 F)
1976
42.2 C (108.0 F)
1977
38.3 C (100.9 F)
1978
37.8 C (100.0 F)
1979
38.3 C (100.9 F)
1980
42.8 C (109.0 F)
1981
39.4 C (102.9 F)
1982
39.4 C (102.9 F)
1983
38.9 C (102.0 F)
1984
37.8 C (100.0 F)
1985
40.0 C (104.0 F)
1986
37.2 C (99.0 F)
1987
39.4 C (102.9 F)
1988
42.2 C (108.0 F)
1989
41.7 C (107.1 F)
1990
38.9 C (102.0 F)
1991
40.6 C (105.1 F)
1992
35.0 C (95.0 F)
1993
33.3 C (91.9 F)
1994
35.6 C (96.1 F)
1995
41.1 C (106.0 F)
1996
36.7 C (98.1 F)
1997
38.3 C (100.9 F)
1998
36.1 C (97.0 F)
1999
37.8 C (100.0 F)
2000
38.3 C (100.9 F)
2001
37.2 C (99.0 F)
2002
42.8 C (109.0 F)
2003
40.6 C (105.1 F)
2004
37.8 C (100.0 F)
2005
40.6 C (105.1 F)
2006
36.7 C (98.1 F)
2007
38.3 C (100.9 F)
2008
24.4 C (75.9 F)
Coldest night (TNn)
The coldest night of the year at Armour, 1896 to 2008. The record is -42.8 C (-45.0 F) in 1905, marked on the chart; the median year is -30.0 C (-22.0 F).
Coldest night (TNn) at Armour by year
Year
Coldest night (TNn)
1896
-26.1 C (-15.0 F)
1897
-31.7 C (-25.1 F)
1898
-26.7 C (-16.1 F)
1899
-38.3 C (-36.9 F)
1900
-27.8 C (-18.0 F)
1901
-32.2 C (-26.0 F)
1902
-31.1 C (-24.0 F)
1903
-31.1 C (-24.0 F)
1904
-31.7 C (-25.1 F)
1905
-42.8 C (-45.0 F)
1906
-31.7 C (-25.1 F)
1907
-33.3 C (-27.9 F)
1908
-25.0 C (-13.0 F)
1909
-31.1 C (-24.0 F)
1910
-31.1 C (-24.0 F)
1911
-24.4 C (-11.9 F)
1912
-42.8 C (-45.0 F)
1913
-29.4 C (-20.9 F)
1914
-27.8 C (-18.0 F)
1915
-32.2 C (-26.0 F)
1916
-37.8 C (-36.0 F)
1917
-39.4 C (-38.9 F)
1918
-35.0 C (-31.0 F)
1919
-31.1 C (-24.0 F)
1920
-25.6 C (-14.1 F)
1921
-26.1 C (-15.0 F)
1922
-32.2 C (-26.0 F)
1923
-28.9 C (-20.0 F)
1924
-35.6 C (-32.1 F)
1925
-26.1 C (-15.0 F)
1926
-26.7 C (-16.1 F)
1927
-28.9 C (-20.0 F)
1928
-32.2 C (-26.0 F)
1929
-31.1 C (-24.0 F)
1930
-32.2 C (-26.0 F)
1931
-22.2 C (-8.0 F)
1932
-30.6 C (-23.1 F)
1933
-31.7 C (-25.1 F)
1934
-25.6 C (-14.1 F)
1935
-28.9 C (-20.0 F)
1936
-33.9 C (-29.0 F)
1937
-30.6 C (-23.1 F)
1938
-30.0 C (-22.0 F)
1939
-26.7 C (-16.1 F)
1940
-31.1 C (-24.0 F)
1941
-23.3 C (-9.9 F)
1942
-31.1 C (-24.0 F)
1943
-32.2 C (-26.0 F)
1944
-30.6 C (-23.1 F)
1945
-26.7 C (-16.1 F)
1946
-25.6 C (-14.1 F)
1947
-26.1 C (-15.0 F)
1948
-32.2 C (-26.0 F)
1949
-31.1 C (-24.0 F)
1950
-31.1 C (-24.0 F)
1951
-30.0 C (-22.0 F)
1952
-25.6 C (-14.1 F)
1953
-28.3 C (-18.9 F)
1954
-30.0 C (-22.0 F)
1955
-28.9 C (-20.0 F)
1956
-28.9 C (-20.0 F)
1957
-27.8 C (-18.0 F)
1958
-28.3 C (-18.9 F)
1959
-29.4 C (-20.9 F)
1960
-30.6 C (-23.1 F)
1961
-30.6 C (-23.1 F)
1962
-33.3 C (-27.9 F)
1963
-29.4 C (-20.9 F)
1964
-28.9 C (-20.0 F)
1965
-27.2 C (-17.0 F)
1966
-35.6 C (-32.1 F)
1967
-28.3 C (-18.9 F)
1968
-31.7 C (-25.1 F)
1969
-24.4 C (-11.9 F)
1970
-35.6 C (-32.1 F)
1971
-30.0 C (-22.0 F)
1972
-35.0 C (-31.0 F)
1973
-28.9 C (-20.0 F)
1974
-35.0 C (-31.0 F)
1975
-30.6 C (-23.1 F)
1976
-28.9 C (-20.0 F)
1977
-31.7 C (-25.1 F)
1978
-32.8 C (-27.0 F)
1979
-31.1 C (-24.0 F)
1980
-30.0 C (-22.0 F)
1981
-31.1 C (-24.0 F)
1982
-32.2 C (-26.0 F)
1983
-33.3 C (-27.9 F)
1984
-29.4 C (-20.9 F)
1985
-29.4 C (-20.9 F)
1986
-27.2 C (-17.0 F)
1987
-21.1 C (-6.0 F)
1988
-33.3 C (-27.9 F)
1989
-35.0 C (-31.0 F)
1990
-31.1 C (-24.0 F)
1991
-25.0 C (-13.0 F)
1992
-22.8 C (-9.0 F)
1993
-28.9 C (-20.0 F)
1994
-34.4 C (-29.9 F)
1995
-23.9 C (-11.0 F)
1996
-32.2 C (-26.0 F)
1997
-28.3 C (-18.9 F)
1998
-28.9 C (-20.0 F)
1999
-27.8 C (-18.0 F)
2000
-27.2 C (-17.0 F)
2001
-27.2 C (-17.0 F)
2002
-22.8 C (-9.0 F)
2003
-28.9 C (-20.0 F)
2004
-26.7 C (-16.1 F)
2005
-28.9 C (-20.0 F)
2006
-21.1 C (-6.0 F)
2007
-27.2 C (-17.0 F)
2008
-27.2 C (-17.0 F)
Wettest day (Rx1day)
The wettest day of the year at Armour, 1896 to 2008. The record is 138.7 mm (5.5 in) in 1937, marked on the chart; the median year is 50.8 mm (2.0 in).
Wettest day (Rx1day) at Armour by year
Year
Wettest day (Rx1day)
1896
59.2 mm (2.3 in)
1897
74.7 mm (2.9 in)
1898
45.7 mm (1.8 in)
1899
57.4 mm (2.3 in)
1900
58.4 mm (2.3 in)
1901
78.7 mm (3.1 in)
1902
35.6 mm (1.4 in)
1903
30.5 mm (1.2 in)
1904
33.0 mm (1.3 in)
1905
66.0 mm (2.6 in)
1906
44.5 mm (1.8 in)
1907
55.9 mm (2.2 in)
1908
63.5 mm (2.5 in)
1909
86.4 mm (3.4 in)
1910
50.8 mm (2.0 in)
1911
104.1 mm (4.1 in)
1912
40.6 mm (1.6 in)
1913
32.5 mm (1.3 in)
1914
32.5 mm (1.3 in)
1915
72.1 mm (2.8 in)
1916
57.4 mm (2.3 in)
1917
51.8 mm (2.0 in)
1918
44.5 mm (1.8 in)
1919
50.8 mm (2.0 in)
1920
56.4 mm (2.2 in)
1921
53.1 mm (2.1 in)
1922
41.4 mm (1.6 in)
1923
42.2 mm (1.7 in)
1924
99.3 mm (3.9 in)
1925
40.4 mm (1.6 in)
1926
54.1 mm (2.1 in)
1927
45.0 mm (1.8 in)
1928
45.7 mm (1.8 in)
1929
45.2 mm (1.8 in)
1930
30.5 mm (1.2 in)
1931
58.9 mm (2.3 in)
1932
42.4 mm (1.7 in)
1933
46.7 mm (1.8 in)
1934
61.7 mm (2.4 in)
1935
53.8 mm (2.1 in)
1936
35.6 mm (1.4 in)
1937
138.7 mm (5.5 in)
1938
36.3 mm (1.4 in)
1939
53.1 mm (2.1 in)
1940
39.9 mm (1.6 in)
1941
35.6 mm (1.4 in)
1942
59.4 mm (2.3 in)
1943
35.3 mm (1.4 in)
1944
49.5 mm (1.9 in)
1945
42.4 mm (1.7 in)
1946
56.4 mm (2.2 in)
1947
45.0 mm (1.8 in)
1948
33.5 mm (1.3 in)
1949
79.5 mm (3.1 in)
1950
112.8 mm (4.4 in)
1951
36.8 mm (1.4 in)
1952
31.8 mm (1.3 in)
1953
94.7 mm (3.7 in)
1954
47.5 mm (1.9 in)
1955
52.1 mm (2.1 in)
1956
45.2 mm (1.8 in)
1957
28.4 mm (1.1 in)
1958
28.2 mm (1.1 in)
1959
47.5 mm (1.9 in)
1960
50.5 mm (2.0 in)
1961
117.1 mm (4.6 in)
1962
53.6 mm (2.1 in)
1963
45.5 mm (1.8 in)
1964
73.9 mm (2.9 in)
1965
53.3 mm (2.1 in)
1966
36.6 mm (1.4 in)
1967
42.4 mm (1.7 in)
1968
54.6 mm (2.1 in)
1969
35.1 mm (1.4 in)
1970
58.4 mm (2.3 in)
1971
40.6 mm (1.6 in)
1972
41.9 mm (1.6 in)
1973
48.3 mm (1.9 in)
1974
23.1 mm (0.9 in)
1975
27.9 mm (1.1 in)
1976
35.6 mm (1.4 in)
1977
53.1 mm (2.1 in)
1978
86.4 mm (3.4 in)
1979
38.1 mm (1.5 in)
1980
57.4 mm (2.3 in)
1981
41.1 mm (1.6 in)
1982
41.7 mm (1.6 in)
1983
32.8 mm (1.3 in)
1984
85.9 mm (3.4 in)
1985
51.3 mm (2.0 in)
1986
115.6 mm (4.6 in)
1987
84.1 mm (3.3 in)
1988
45.7 mm (1.8 in)
1989
49.5 mm (1.9 in)
1990
55.6 mm (2.2 in)
1991
46.2 mm (1.8 in)
1992
59.2 mm (2.3 in)
1993
55.6 mm (2.2 in)
1994
36.8 mm (1.4 in)
1995
61.5 mm (2.4 in)
1996
70.1 mm (2.8 in)
1997
115.1 mm (4.5 in)
1998
66.3 mm (2.6 in)
1999
51.3 mm (2.0 in)
2000
56.1 mm (2.2 in)
2001
66.8 mm (2.6 in)
2002
58.9 mm (2.3 in)
2003
72.6 mm (2.9 in)
2004
38.1 mm (1.5 in)
2005
76.2 mm (3.0 in)
2006
38.1 mm (1.5 in)
2007
71.1 mm (2.8 in)
2008
56.1 mm (2.2 in)
Wettest five days (Rx5day)
The wettest five days of the year at Armour, 1896 to 2008. The record is 158.0 mm (6.2 in) in 1937, marked on the chart; the median year is 71.7 mm (2.8 in).
Wettest five days (Rx5day) at Armour by year
Year
Wettest five days (Rx5day)
1896
91.2 mm (3.6 in)
1897
75.2 mm (3.0 in)
1898
63.5 mm (2.5 in)
1899
78.7 mm (3.1 in)
1900
117.4 mm (4.6 in)
1901
128.5 mm (5.1 in)
1902
47.8 mm (1.9 in)
1903
60.9 mm (2.4 in)
1904
47.0 mm (1.9 in)
1905
107.1 mm (4.2 in)
1906
83.4 mm (3.3 in)
1907
75.7 mm (3.0 in)
1908
75.9 mm (3.0 in)
1909
114.3 mm (4.5 in)
1910
50.8 mm (2.0 in)
1911
111.7 mm (4.4 in)
1912
43.2 mm (1.7 in)
1913
40.7 mm (1.6 in)
1914
49.5 mm (1.9 in)
1915
87.2 mm (3.4 in)
1916
63.8 mm (2.5 in)
1917
83.6 mm (3.3 in)
1918
67.3 mm (2.6 in)
1919
50.8 mm (2.0 in)
1920
82.8 mm (3.3 in)
1921
66.1 mm (2.6 in)
1922
54.2 mm (2.1 in)
1923
58.2 mm (2.3 in)
1924
103.9 mm (4.1 in)
1925
62.8 mm (2.5 in)
1926
97.5 mm (3.8 in)
1927
51.6 mm (2.0 in)
1928
65.2 mm (2.6 in)
1929
79.2 mm (3.1 in)
1930
56.2 mm (2.2 in)
1931
92.2 mm (3.6 in)
1932
49.5 mm (1.9 in)
1933
74.9 mm (2.9 in)
1934
71.1 mm (2.8 in)
1935
67.6 mm (2.7 in)
1936
59.3 mm (2.3 in)
1937
158.0 mm (6.2 in)
1938
64.0 mm (2.5 in)
1939
74.2 mm (2.9 in)
1940
63.7 mm (2.5 in)
1941
56.4 mm (2.2 in)
1942
109.0 mm (4.3 in)
1943
51.1 mm (2.0 in)
1944
101.3 mm (4.0 in)
1945
74.9 mm (2.9 in)
1946
130.1 mm (5.1 in)
1947
59.7 mm (2.4 in)
1948
65.3 mm (2.6 in)
1949
99.1 mm (3.9 in)
1950
114.6 mm (4.5 in)
1951
83.3 mm (3.3 in)
1952
32.3 mm (1.3 in)
1953
156.5 mm (6.2 in)
1954
67.9 mm (2.7 in)
1955
58.7 mm (2.3 in)
1956
46.2 mm (1.8 in)
1957
49.8 mm (2.0 in)
1958
45.0 mm (1.8 in)
1959
61.9 mm (2.4 in)
1960
65.2 mm (2.6 in)
1961
119.6 mm (4.7 in)
1962
98.6 mm (3.9 in)
1963
68.7 mm (2.7 in)
1964
89.4 mm (3.5 in)
1965
68.1 mm (2.7 in)
1966
62.5 mm (2.5 in)
1967
83.0 mm (3.3 in)
1968
98.8 mm (3.9 in)
1969
57.1 mm (2.2 in)
1970
77.4 mm (3.0 in)
1971
55.6 mm (2.2 in)
1972
90.7 mm (3.6 in)
1973
90.8 mm (3.6 in)
1974
36.6 mm (1.4 in)
1975
50.8 mm (2.0 in)
1976
55.8 mm (2.2 in)
1977
83.6 mm (3.3 in)
1978
104.1 mm (4.1 in)
1979
51.3 mm (2.0 in)
1980
69.4 mm (2.7 in)
1981
65.0 mm (2.6 in)
1982
65.0 mm (2.6 in)
1983
71.7 mm (2.8 in)
1984
117.7 mm (4.6 in)
1985
58.9 mm (2.3 in)
1986
144.0 mm (5.7 in)
1987
127.1 mm (5.0 in)
1988
57.9 mm (2.3 in)
1989
85.6 mm (3.4 in)
1990
57.6 mm (2.3 in)
1991
76.9 mm (3.0 in)
1992
83.6 mm (3.3 in)
1993
96.8 mm (3.8 in)
1994
61.8 mm (2.4 in)
1995
80.8 mm (3.2 in)
1996
75.2 mm (3.0 in)
1997
123.5 mm (4.9 in)
1998
92.7 mm (3.6 in)
1999
85.9 mm (3.4 in)
2000
69.3 mm (2.7 in)
2001
90.7 mm (3.6 in)
2002
62.2 mm (2.4 in)
2003
94.2 mm (3.7 in)
2004
48.3 mm (1.9 in)
2005
129.0 mm (5.1 in)
2006
72.1 mm (2.8 in)
2007
88.4 mm (3.5 in)
2008
56.1 mm (2.2 in)
Longest dry spell (CDD)
The longest dry spell of the year at Armour, 1896 to 2008. The record is 77 days in 1962, marked on the chart; the median year is 33 days.
Longest dry spell (CDD) at Armour by year
Year
Longest dry spell (CDD)
1896
34 days
1897
23 days
1898
26 days
1899
28 days
1900
34 days
1901
27 days
1902
23 days
1903
42 days
1904
50 days
1905
34 days
1906
36 days
1907
71 days
1908
31 days
1909
32 days
1910
22 days
1911
20 days
1912
27 days
1913
30 days
1914
24 days
1915
34 days
1916
29 days
1917
22 days
1918
39 days
1919
29 days
1920
34 days
1921
41 days
1922
36 days
1923
47 days
1924
20 days
1925
28 days
1926
33 days
1927
37 days
1928
36 days
1929
18 days
1930
35 days
1931
52 days
1932
32 days
1933
43 days
1934
48 days
1935
43 days
1936
35 days
1937
36 days
1938
58 days
1939
57 days
1940
26 days
1941
30 days
1942
38 days
1943
37 days
1944
32 days
1945
41 days
1946
35 days
1947
28 days
1948
28 days
1949
40 days
1950
30 days
1951
23 days
1952
63 days
1953
26 days
1954
34 days
1955
54 days
1956
28 days
1957
31 days
1958
53 days
1959
26 days
1960
31 days
1961
36 days
1962
77 days
1963
19 days
1964
73 days
1965
23 days
1966
42 days
1967
43 days
1968
35 days
1969
21 days
1970
35 days
1971
33 days
1972
23 days
1973
33 days
1974
34 days
1975
25 days
1976
47 days
1977
28 days
1978
44 days
1979
36 days
1980
44 days
1981
30 days
1982
37 days
1983
25 days
1984
31 days
1985
25 days
1986
42 days
1987
37 days
1988
27 days
1989
25 days
1990
25 days
1991
31 days
1992
28 days
1993
27 days
1994
32 days
1995
23 days
1996
31 days
1997
31 days
1998
39 days
1999
30 days
2000
28 days
2001
40 days
2002
54 days
2003
30 days
2004
31 days
2005
22 days
2006
62 days
2007
41 days
2008
35 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
86 years with a frost
Across 86 years with a frost, the median last spring frost at Armour falls on 6 May and the median first autumn frost on 29 September, which leaves a median of 148 days between them.
In 1970 to 2003 the median growing season was 158 days. That is 12 days more than in 1899 to 1942.
Fitted over all years, the growing season changes by +1.7 days per decade at this station.
Frost dates and growing season at Armour
Measure
Median, all years
Earliest period (1899 to 1942)
Recent period (1970 to 2003)
Recent against earliest
Fitted trend
Last spring frost
6 May
4 May
30 April
4 days earlier
-1.3 days per decade
First autumn frost
29 September
28 September
30 September
2 days later
+0.4 days per decade
Growing days
148 days
146 days
158 days
12 days more
+1.7 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
99 years, 1899 to 2005
A day with at least 49.4 mm (1.9 in) of rain is expected about once in 2 years. A day with at least 137.3 mm (5.4 in) of rain is expected about once in 100 years.
Rainfall return levels at Armour: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
49.4 mm (1.9 in)
5 years
66.7 mm (2.6 in)
10 years
80.3 mm (3.2 in)
25 years
100.4 mm (4.0 in)
50 years
117.7 mm (4.6 in)
100 years
137.3 mm (5.4 in)
Longer than the 99 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, 99 years of values from 1899 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: 138.7 mm (5.5 in) in 1937; 117.1 mm (4.6 in) in 1961; 115.6 mm (4.6 in) in 1986.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Armour standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Armour 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.