Record envelope, standing records and threshold days for Deadwood (USC00392207), South Dakota, United States, with 98 years of record.
Key Facts for Deadwood
Deadwood (USC00392207) is a weather station in South Dakota, United States at 44.37 latitude and -103.73 longitude, 1,423 m (4,670 ft) above sea level.
The station reports from 1909 to 2006, 98 years of record.
1,464 records set at Deadwood still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Deadwood set a daily record snowfall of 22.9 cm (9.0 in) on 24 April 2006.
About the Station
Location: South Dakota, United States, 44.37 latitude, -103.73 longitude.
Elevation: 1,423 m (4,670 ft).
Period of record: 1909 to 2006, 98 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 Deadwood. 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 Deadwood, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
18.3 C (64.9 F)
-34.4 C (-29.9 F)
n/a
n/a
Feb
20.0 C (68.0 F)
-33.9 C (-29.0 F)
n/a
n/a
Mar
25.6 C (78.1 F)
-30.0 C (-22.0 F)
n/a
n/a
Apr
32.8 C (91.0 F)
-21.1 C (-6.0 F)
n/a
n/a
May
34.4 C (93.9 F)
-16.7 C (1.9 F)
n/a
n/a
Jun
38.3 C (100.9 F)
-5.0 C (23.0 F)
n/a
n/a
Jul
39.4 C (102.9 F)
0.0 C (32.0 F)
n/a
n/a
Aug
39.4 C (102.9 F)
-2.8 C (27.0 F)
n/a
n/a
Sep
38.3 C (100.9 F)
-10.0 C (14.0 F)
n/a
n/a
Oct
31.7 C (89.1 F)
-21.7 C (-7.1 F)
n/a
n/a
Nov
23.9 C (75.0 F)
-28.3 C (-18.9 F)
n/a
n/a
Dec
19.4 C (66.9 F)
-33.9 C (-29.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Deadwood still stand. 1950 holds the most, with 40.
Standing records at Deadwood by the year they were set
Year set
Standing records
1909
20
1910
37
1911
33
1912
19
1913
14
1914
11
1915
25
1916
30
1917
27
1918
39
1919
34
1920
8
1921
20
1922
10
1923
4
1942
7
1943
30
1944
15
1945
18
1946
18
1947
17
1948
28
1949
28
1950
40
1951
28
1952
19
1953
23
1954
21
1955
28
1956
22
1957
11
1958
15
1959
19
1960
13
1961
13
1962
25
1963
14
1964
10
1965
24
1966
18
1967
15
1968
19
1969
27
1970
9
1971
17
1972
31
1973
19
1974
14
1975
10
1976
14
1977
7
1978
14
1979
16
1980
8
1981
13
1982
6
1983
14
1984
1
1985
21
1986
17
1987
21
1988
11
1989
28
1990
19
1991
17
1992
25
1993
15
1994
15
1995
23
1996
21
1997
16
1998
13
1999
16
2000
19
2001
7
2002
17
2003
19
2004
10
2005
14
2006
11
All-Time Record Progression
2 new records
2 all-time records were set at Deadwood between 4 February 1989 and 5 July 1989. Each dot is a new record.
When Deadwood set new all-time records
Date
Kind
Detail
1989-02-04
Record low maximum temperature
Record low maximum temperature -26.1 C (-15.0 F)
1989-07-05
Record high minimum temperature
Record high minimum temperature 25.0 C (77.0 F)
Wettest Day of Each Month
May: 132.1 mm (5.2 in)
The wettest day on record for each calendar month at Deadwood. The most was 132.1 mm (5.2 in) on 11 May 1922.
Record daily precipitation for each month at Deadwood
Month
Record daily precipitation (mm)
Date
Jan
60.7 mm (2.4 in)
27 January 1944
Feb
44.2 mm (1.7 in)
26 February 1958
Mar
63.5 mm (2.5 in)
29 March 1910
Apr
101.6 mm (4.0 in)
7 April 1919
May
132.1 mm (5.2 in)
11 May 1922
Jun
111.0 mm (4.4 in)
14 June 1976
Jul
104.1 mm (4.1 in)
2 July 1958
Aug
67.1 mm (2.6 in)
8 August 1979
Sep
75.9 mm (3.0 in)
5 September 1971
Oct
73.9 mm (2.9 in)
5 October 1995
Nov
73.7 mm (2.9 in)
5 November 1922
Dec
43.2 mm (1.7 in)
30 December 1922
Period of Record Coverage
1909 to 2006
Complete yearUnder 90 percent of days
80 years of record at Deadwood, 1909 to 2006. 26 years have data for under 90 percent of days and are left out of rankings: 1909, 1910, 1920, 1923, 1942, 1945, 1965, 1983 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 64 complete years at Deadwood, 1911 to 2002. Blue stripes are years cooler than the station's own mean of 6.6 C (43.9 F); red stripes are warmer. The coolest year was 1951, at 4.9 C (40.9 F), and the warmest was 1999, at 8.5 C (47.3 F). The strongest colour marks a difference of 1.9 C (3.4 F).
Annual mean temperature at Deadwood as warming stripes, 1911 to 2002
Year
Annual mean temperature
Difference from the station mean
1911
6.5 C
-0.06 C
1912
5.6 C
-1.04 C
1913
6.1 C
-0.48 C
1914
7.4 C
+0.76 C
1915
6.0 C
-0.63 C
1916
5.2 C
-1.43 C
1917
5.6 C
-1.04 C
1918
6.9 C
+0.26 C
1919
6.3 C
-0.26 C
1921
7.6 C
+1.01 C
1922
6.0 C
-0.62 C
1943
7.6 C
+1.04 C
1944
6.4 C
-0.19 C
1945
5.9 C
-0.74 C
1946
7.6 C
+0.97 C
1947
6.7 C
+0.08 C
1948
6.7 C
+0.09 C
1949
6.5 C
-0.09 C
1950
5.4 C
-1.21 C
1951
4.9 C
-1.67 C
1952
7.3 C
+0.68 C
1953
7.6 C
+1.04 C
1954
7.7 C
+1.09 C
1955
6.3 C
-0.31 C
1956
7.1 C
+0.55 C
1957
5.7 C
-0.94 C
1958
6.5 C
-0.07 C
1959
5.9 C
-0.68 C
1960
6.7 C
+0.11 C
1961
6.7 C
+0.09 C
1962
6.0 C
-0.56 C
1963
7.0 C
+0.36 C
1966
6.6 C
-0.03 C
1967
6.4 C
-0.23 C
1968
6.2 C
-0.42 C
1969
6.6 C
-0.04 C
1970
5.9 C
-0.74 C
1971
6.0 C
-0.62 C
1972
6.1 C
-0.54 C
1973
6.5 C
-0.09 C
1974
6.4 C
-0.15 C
1975
5.6 C
-0.98 C
1976
6.6 C
-0.01 C
1977
6.4 C
-0.22 C
1978
5.5 C
-1.11 C
1979
6.0 C
-0.64 C
1980
7.2 C
+0.57 C
1981
7.9 C
+1.33 C
1982
5.6 C
-1.03 C
1985
5.5 C
-1.09 C
1986
7.6 C
+0.96 C
1987
7.9 C
+1.26 C
1988
7.6 C
+1.05 C
1989
6.3 C
-0.32 C
1991
7.6 C
+0.99 C
1992
7.3 C
+0.67 C
1993
5.9 C
-0.65 C
1994
7.6 C
+0.97 C
1995
6.7 C
+0.08 C
1997
6.9 C
+0.33 C
1998
7.7 C
+1.08 C
1999
8.5 C
+1.89 C
2000
7.5 C
+0.94 C
2002
7.0 C
+0.44 C
The annual mean temperature here has risen by 0.09 C (0.02 to 0.16) per decade over 1911 to 2002. In Fahrenheit: 0.16 F (0.03 to 0.29) per decade. The slope is a straight line fitted to 64 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Deadwood
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.09 C (0.02 to 0.16) per decade
0.16 F (0.03 to 0.29) per decade
1911 to 2002
64
Rise
Mean daily maximum
0.05 C (-0.05 to 0.15) per decade
0.1 F (-0.1 to 0.3) per decade
1911 to 2002
64
Not clearly different from zero
Mean daily minimum
0.1 C (0.1 to 0.2) per decade
0.2 F (0.1 to 0.4) per decade
1911 to 2002
64
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
1909 to 2006
Yearly extremes at Deadwood: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
39.4 C (102.9 F)
1949
36.1 C (97.0 F)
80
Coldest night (TNn)
-34.4 C (-29.9 F)
1918
-28.3 C (-18.9 F)
80
Wettest day (Rx1day)
132.1 mm (5.2 in)
1922
51.6 mm (2.0 in)
80
Wettest five days (Rx5day)
265.0 mm (10.4 in)
1976
81.6 mm (3.2 in)
80
Longest dry spell (CDD)
54 days
1981
23 days
80
Hottest day (TXx)
The hottest day of the year at Deadwood, 1909 to 2006. The record is 39.4 C (102.9 F) in 1949, marked on the chart; the median year is 36.1 C (97.0 F).
Hottest day (TXx) at Deadwood by year
Year
Hottest day (TXx)
1909
35.6 C (96.1 F)
1910
37.8 C (100.0 F)
1911
34.4 C (93.9 F)
1912
33.9 C (93.0 F)
1913
34.4 C (93.9 F)
1914
34.4 C (93.9 F)
1915
34.4 C (93.9 F)
1916
35.6 C (96.1 F)
1917
37.8 C (100.0 F)
1918
35.6 C (96.1 F)
1919
38.3 C (100.9 F)
1920
32.2 C (90.0 F)
1921
36.1 C (97.0 F)
1922
35.6 C (96.1 F)
1923
33.3 C (91.9 F)
1942
32.8 C (91.0 F)
1943
35.6 C (96.1 F)
1944
37.2 C (99.0 F)
1945
36.1 C (97.0 F)
1946
37.2 C (99.0 F)
1947
38.9 C (102.0 F)
1948
38.9 C (102.0 F)
1949
39.4 C (102.9 F)
1950
33.9 C (93.0 F)
1951
38.3 C (100.9 F)
1952
39.4 C (102.9 F)
1953
36.7 C (98.1 F)
1954
39.4 C (102.9 F)
1955
36.7 C (98.1 F)
1956
34.4 C (93.9 F)
1957
35.6 C (96.1 F)
1958
35.0 C (95.0 F)
1959
35.0 C (95.0 F)
1960
36.1 C (97.0 F)
1961
36.1 C (97.0 F)
1962
31.7 C (89.1 F)
1963
34.4 C (93.9 F)
1964
33.9 C (93.0 F)
1965
32.2 C (90.0 F)
1966
37.8 C (100.0 F)
1967
32.8 C (91.0 F)
1968
34.4 C (93.9 F)
1969
38.9 C (102.0 F)
1970
37.2 C (99.0 F)
1971
33.9 C (93.0 F)
1972
34.4 C (93.9 F)
1973
37.8 C (100.0 F)
1974
36.7 C (98.1 F)
1975
36.1 C (97.0 F)
1976
35.0 C (95.0 F)
1977
35.6 C (96.1 F)
1978
36.1 C (97.0 F)
1979
36.7 C (98.1 F)
1980
36.7 C (98.1 F)
1981
38.3 C (100.9 F)
1982
35.0 C (95.0 F)
1983
37.8 C (100.0 F)
1984
34.4 C (93.9 F)
1985
37.2 C (99.0 F)
1986
35.0 C (95.0 F)
1987
35.0 C (95.0 F)
1988
36.7 C (98.1 F)
1989
37.8 C (100.0 F)
1990
37.8 C (100.0 F)
1991
35.6 C (96.1 F)
1992
34.4 C (93.9 F)
1993
32.8 C (91.0 F)
1994
35.0 C (95.0 F)
1995
37.8 C (100.0 F)
1996
35.0 C (95.0 F)
1997
33.9 C (93.0 F)
1998
37.2 C (99.0 F)
1999
36.1 C (97.0 F)
2000
36.7 C (98.1 F)
2001
37.2 C (99.0 F)
2002
38.3 C (100.9 F)
2003
38.3 C (100.9 F)
2004
37.2 C (99.0 F)
2005
38.3 C (100.9 F)
2006
24.4 C (75.9 F)
Coldest night (TNn)
The coldest night of the year at Deadwood, 1909 to 2006. The record is -34.4 C (-29.9 F) in 1918, marked on the chart; the median year is -28.3 C (-18.9 F).
Coldest night (TNn) at Deadwood by year
Year
Coldest night (TNn)
1909
-26.7 C (-16.1 F)
1910
-30.0 C (-22.0 F)
1911
-30.0 C (-22.0 F)
1912
-31.1 C (-24.0 F)
1913
-32.8 C (-27.0 F)
1914
-30.6 C (-23.1 F)
1915
-27.8 C (-18.0 F)
1916
-32.2 C (-26.0 F)
1917
-32.2 C (-26.0 F)
1918
-34.4 C (-29.9 F)
1919
-33.3 C (-27.9 F)
1920
-25.0 C (-13.0 F)
1921
-23.3 C (-9.9 F)
1922
-27.8 C (-18.0 F)
1923
-30.0 C (-22.0 F)
1942
-18.3 C (-0.9 F)
1943
-34.4 C (-29.9 F)
1944
-26.7 C (-16.1 F)
1945
-25.6 C (-14.1 F)
1946
-25.6 C (-14.1 F)
1947
-25.6 C (-14.1 F)
1948
-28.3 C (-18.9 F)
1949
-32.2 C (-26.0 F)
1950
-30.0 C (-22.0 F)
1951
-31.1 C (-24.0 F)
1952
-28.9 C (-20.0 F)
1953
-23.3 C (-9.9 F)
1954
-27.8 C (-18.0 F)
1955
-28.3 C (-18.9 F)
1956
-24.4 C (-11.9 F)
1957
-28.9 C (-20.0 F)
1958
-23.9 C (-11.0 F)
1959
-29.4 C (-20.9 F)
1960
-27.8 C (-18.0 F)
1961
-27.8 C (-18.0 F)
1962
-31.7 C (-25.1 F)
1963
-33.3 C (-27.9 F)
1964
-30.6 C (-23.1 F)
1965
-28.9 C (-20.0 F)
1966
-26.1 C (-15.0 F)
1967
-27.8 C (-18.0 F)
1968
-31.1 C (-24.0 F)
1969
-25.0 C (-13.0 F)
1970
-28.3 C (-18.9 F)
1971
-29.4 C (-20.9 F)
1972
-30.0 C (-22.0 F)
1973
-27.8 C (-18.0 F)
1974
-29.4 C (-20.9 F)
1975
-27.2 C (-17.0 F)
1976
-28.3 C (-18.9 F)
1977
-30.0 C (-22.0 F)
1978
-30.0 C (-22.0 F)
1979
-29.4 C (-20.9 F)
1980
-29.4 C (-20.9 F)
1981
-28.9 C (-20.0 F)
1982
-28.9 C (-20.0 F)
1983
-19.4 C (-2.9 F)
1984
-26.1 C (-15.0 F)
1985
-28.3 C (-18.9 F)
1986
-26.7 C (-16.1 F)
1987
-20.6 C (-5.1 F)
1988
-25.6 C (-14.1 F)
1989
-33.9 C (-29.0 F)
1990
-33.9 C (-29.0 F)
1991
-23.3 C (-9.9 F)
1992
-25.0 C (-13.0 F)
1993
-26.7 C (-16.1 F)
1994
-29.4 C (-20.9 F)
1995
-25.6 C (-14.1 F)
1996
-32.8 C (-27.0 F)
1997
-29.4 C (-20.9 F)
1998
-27.8 C (-18.0 F)
1999
-23.3 C (-9.9 F)
2000
-24.4 C (-11.9 F)
2001
-21.1 C (-6.0 F)
2002
-22.8 C (-9.0 F)
2003
-27.2 C (-17.0 F)
2004
-24.4 C (-11.9 F)
2005
-25.6 C (-14.1 F)
2006
-31.7 C (-25.1 F)
Wettest day (Rx1day)
The wettest day of the year at Deadwood, 1909 to 2006. The record is 132.1 mm (5.2 in) in 1922, marked on the chart; the median year is 51.6 mm (2.0 in).
Wettest day (Rx1day) at Deadwood by year
Year
Wettest day (Rx1day)
1909
86.4 mm (3.4 in)
1910
63.5 mm (2.5 in)
1911
38.1 mm (1.5 in)
1912
35.6 mm (1.4 in)
1913
63.5 mm (2.5 in)
1914
34.3 mm (1.4 in)
1915
38.1 mm (1.5 in)
1916
38.1 mm (1.5 in)
1917
20.3 mm (0.8 in)
1918
76.2 mm (3.0 in)
1919
101.6 mm (4.0 in)
1920
41.9 mm (1.6 in)
1921
50.8 mm (2.0 in)
1922
132.1 mm (5.2 in)
1923
63.5 mm (2.5 in)
1942
49.3 mm (1.9 in)
1943
29.2 mm (1.1 in)
1944
67.1 mm (2.6 in)
1945
58.7 mm (2.3 in)
1946
112.3 mm (4.4 in)
1947
60.2 mm (2.4 in)
1948
53.6 mm (2.1 in)
1949
50.5 mm (2.0 in)
1950
41.1 mm (1.6 in)
1951
47.8 mm (1.9 in)
1952
85.9 mm (3.4 in)
1953
42.2 mm (1.7 in)
1954
45.2 mm (1.8 in)
1955
54.6 mm (2.1 in)
1956
58.4 mm (2.3 in)
1957
39.4 mm (1.6 in)
1958
104.1 mm (4.1 in)
1959
21.3 mm (0.8 in)
1960
29.2 mm (1.1 in)
1961
25.9 mm (1.0 in)
1962
68.6 mm (2.7 in)
1963
62.7 mm (2.5 in)
1964
88.4 mm (3.5 in)
1965
109.2 mm (4.3 in)
1966
51.8 mm (2.0 in)
1967
50.8 mm (2.0 in)
1968
43.9 mm (1.7 in)
1969
46.7 mm (1.8 in)
1970
86.4 mm (3.4 in)
1971
75.9 mm (3.0 in)
1972
43.9 mm (1.7 in)
1973
61.2 mm (2.4 in)
1974
50.8 mm (2.0 in)
1975
32.5 mm (1.3 in)
1976
111.0 mm (4.4 in)
1977
58.9 mm (2.3 in)
1978
64.5 mm (2.5 in)
1979
67.1 mm (2.6 in)
1980
23.1 mm (0.9 in)
1981
61.5 mm (2.4 in)
1982
114.8 mm (4.5 in)
1983
27.9 mm (1.1 in)
1984
48.3 mm (1.9 in)
1985
25.7 mm (1.0 in)
1986
51.3 mm (2.0 in)
1987
45.7 mm (1.8 in)
1988
58.4 mm (2.3 in)
1989
45.2 mm (1.8 in)
1990
38.1 mm (1.5 in)
1991
36.1 mm (1.4 in)
1992
68.1 mm (2.7 in)
1993
63.5 mm (2.5 in)
1994
52.1 mm (2.1 in)
1995
121.9 mm (4.8 in)
1996
31.8 mm (1.3 in)
1997
50.8 mm (2.0 in)
1998
71.9 mm (2.8 in)
1999
53.1 mm (2.1 in)
2000
58.4 mm (2.3 in)
2001
61.0 mm (2.4 in)
2002
74.9 mm (2.9 in)
2003
50.8 mm (2.0 in)
2004
51.1 mm (2.0 in)
2005
45.7 mm (1.8 in)
2006
39.9 mm (1.6 in)
Wettest five days (Rx5day)
The wettest five days of the year at Deadwood, 1909 to 2006. The record is 265.0 mm (10.4 in) in 1976, marked on the chart; the median year is 81.6 mm (3.2 in).
Wettest five days (Rx5day) at Deadwood by year
Year
Wettest five days (Rx5day)
1909
219.7 mm (8.6 in)
1910
91.4 mm (3.6 in)
1911
55.9 mm (2.2 in)
1912
59.7 mm (2.4 in)
1913
80.8 mm (3.2 in)
1914
78.8 mm (3.1 in)
1915
94.0 mm (3.7 in)
1916
92.7 mm (3.6 in)
1917
43.2 mm (1.7 in)
1918
118.1 mm (4.6 in)
1919
137.2 mm (5.4 in)
1920
111.7 mm (4.4 in)
1921
63.5 mm (2.5 in)
1922
176.6 mm (7.0 in)
1923
129.5 mm (5.1 in)
1942
52.3 mm (2.1 in)
1943
53.4 mm (2.1 in)
1944
92.8 mm (3.7 in)
1945
71.9 mm (2.8 in)
1946
176.5 mm (6.9 in)
1947
159.8 mm (6.3 in)
1948
76.9 mm (3.0 in)
1949
84.2 mm (3.3 in)
1950
61.8 mm (2.4 in)
1951
80.5 mm (3.2 in)
1952
160.1 mm (6.3 in)
1953
102.9 mm (4.1 in)
1954
57.5 mm (2.3 in)
1955
92.7 mm (3.6 in)
1956
69.9 mm (2.8 in)
1957
74.0 mm (2.9 in)
1958
161.3 mm (6.4 in)
1959
66.7 mm (2.6 in)
1960
42.7 mm (1.7 in)
1961
38.8 mm (1.5 in)
1962
158.2 mm (6.2 in)
1963
91.9 mm (3.6 in)
1964
151.0 mm (5.9 in)
1965
156.2 mm (6.1 in)
1966
98.3 mm (3.9 in)
1967
116.4 mm (4.6 in)
1968
91.8 mm (3.6 in)
1969
48.7 mm (1.9 in)
1970
125.0 mm (4.9 in)
1971
115.8 mm (4.6 in)
1972
93.0 mm (3.7 in)
1973
108.1 mm (4.3 in)
1974
77.5 mm (3.1 in)
1975
75.4 mm (3.0 in)
1976
265.0 mm (10.4 in)
1977
116.0 mm (4.6 in)
1978
101.3 mm (4.0 in)
1979
73.2 mm (2.9 in)
1980
49.5 mm (1.9 in)
1981
73.5 mm (2.9 in)
1982
256.8 mm (10.1 in)
1983
63.7 mm (2.5 in)
1984
56.4 mm (2.2 in)
1985
46.4 mm (1.8 in)
1986
70.9 mm (2.8 in)
1987
57.9 mm (2.3 in)
1988
104.7 mm (4.1 in)
1989
68.0 mm (2.7 in)
1990
71.4 mm (2.8 in)
1991
82.3 mm (3.2 in)
1992
78.8 mm (3.1 in)
1993
106.7 mm (4.2 in)
1994
55.9 mm (2.2 in)
1995
227.1 mm (8.9 in)
1996
45.8 mm (1.8 in)
1997
57.6 mm (2.3 in)
1998
137.7 mm (5.4 in)
1999
77.5 mm (3.1 in)
2000
64.7 mm (2.5 in)
2001
91.5 mm (3.6 in)
2002
79.8 mm (3.1 in)
2003
71.0 mm (2.8 in)
2004
91.3 mm (3.6 in)
2005
99.5 mm (3.9 in)
2006
61.5 mm (2.4 in)
Longest dry spell (CDD)
The longest dry spell of the year at Deadwood, 1909 to 2006. The record is 54 days in 1981, marked on the chart; the median year is 23 days.
Longest dry spell (CDD) at Deadwood by year
Year
Longest dry spell (CDD)
1909
26 days
1910
16 days
1911
28 days
1912
25 days
1913
22 days
1914
21 days
1915
24 days
1916
27 days
1917
37 days
1918
27 days
1919
29 days
1920
22 days
1921
42 days
1922
35 days
1923
23 days
1942
10 days
1943
34 days
1944
22 days
1945
21 days
1946
22 days
1947
19 days
1948
22 days
1949
23 days
1950
24 days
1951
21 days
1952
32 days
1953
47 days
1954
17 days
1955
21 days
1956
15 days
1957
23 days
1958
31 days
1959
45 days
1960
36 days
1961
32 days
1962
19 days
1963
25 days
1964
29 days
1965
43 days
1966
24 days
1967
23 days
1968
17 days
1969
29 days
1970
25 days
1971
19 days
1972
13 days
1973
22 days
1974
24 days
1975
42 days
1976
23 days
1977
20 days
1978
29 days
1979
18 days
1980
25 days
1981
54 days
1982
19 days
1983
15 days
1984
18 days
1985
15 days
1986
25 days
1987
23 days
1988
18 days
1989
21 days
1990
24 days
1991
28 days
1992
25 days
1993
17 days
1994
21 days
1995
12 days
1996
16 days
1997
9 days
1998
29 days
1999
31 days
2000
35 days
2001
17 days
2002
45 days
2003
13 days
2004
25 days
2005
21 days
2006
10 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
64 years with a frost
Across 64 years with a frost, the median last spring frost at Deadwood falls on 31 May and the median first autumn frost on 15 September, which leaves a median of 108 days between them.
In 1968 to 2002 the median growing season was 108 days. That is 1 day more than in 1911 to 1961.
Fitted over all years, the growing season changes by +0.8 days per decade at this station.
Frost dates and growing season at Deadwood
Measure
Median, all years
Earliest period (1911 to 1961)
Recent period (1968 to 2002)
Recent against earliest
Fitted trend
Last spring frost
31 May
3 June
30 May
4 days earlier
-0.6 days per decade
First autumn frost
15 September
15 September
17 September
2 days later
+0.1 days per decade
Growing days
108 days
107 days
108 days
1 day more
+0.8 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
62 years, 1911 to 2000
A day with at least 53.4 mm (2.1 in) of rain is expected about once in 2 years. A day with at least 145.4 mm (5.7 in) of rain is expected about once in 100 years.
Rainfall return levels at Deadwood: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
53.4 mm (2.1 in)
5 years
76.1 mm (3.0 in)
10 years
91.9 mm (3.6 in)
25 years
112.7 mm (4.4 in)
50 years
128.8 mm (5.1 in)
100 years
145.4 mm (5.7 in)
Longer than the 62 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, 62 years of values from 1911 to 2000.
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: 132.1 mm (5.2 in) in 1922; 121.9 mm (4.8 in) in 1995; 114.8 mm (4.5 in) in 1982.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Deadwood standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Deadwood 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.