Deadwood Threshold Days by Year (USC00392207)

18 fixed thresholds counted per year at Deadwood (USC00392207): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Deadwood Thresholds

Deadwood: nights with a minimum temperature at or below 0 C (32 F) in 62 years, most in 1912 with 222.
Deadwood: nights with a minimum temperature at or below -10 C (14 F) in 62 years, most in 1955 with 95.
Deadwood: nights with a minimum temperature at or below -20 C (-4 F) in 62 years, most in 1916 with 35.
Deadwood: days with 10 mm (0.39 in) or more of precipitation in 62 years, most in 1915 with 37.
18 fixed thresholds have at least one qualifying day at Deadwood.

Days at or above 30 C (86 F)

54 years with a qualifying day

Days per year at Deadwood with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 50 in 1919.

Days at or above 30 C (86 F) per year at Deadwood
Year	Days	Decade average
1911	29	27.2
1912	22	27.2
1913	26	27.2
1914	33	27.2
1915	5	27.2
1916	25	27.2
1917	32	27.2
1918	23	27.2
1919	50	27.2
1921	32	22.5
1922	13	22.5
1943	49	38.3
1944	20	38.3
1946	31	38.3
1947	48	38.3
1948	42	38.3
1949	40	38.3
1950	26	32
1951	19	32
1952	46	32
1953	37	32
1954	41	32
1955	47	32
1956	31	32
1957	20	32
1958	18	32
1959	35	32
1960	36	21.1
1961	28	21.1
1962	6	21.1
1963	19	21.1
1964	14	21.1
1966	27	21.1
1967	17	21.1
1968	13	21.1
1969	30	21.1
1970	29	20.3
1971	25	20.3
1972	9	20.3
1973	30	20.3
1974	25	20.3
1975	17	20.3
1976	20	20.3
1977	12	20.3
1978	18	20.3
1979	18	20.3
1980	28	24.6
1981	19	24.6
1982	13	24.6
1988	43	24.6
1989	20	24.6
1991	27	23
1992	12	23
1998	30	23

For each year, a bar from the first to the last day at Deadwood meeting 30 C (86 F).

First to last qualifying date each year at Deadwood
Year	First date	Last date
1911	1911-06-04	1911-09-14
1912	1912-06-23	1912-09-04
1913	1913-05-27	1913-09-03
1914	1914-06-02	1914-09-19
1915	1915-06-25	1915-09-01
1916	1916-06-29	1916-09-08
1917	1917-06-09	1917-09-08
1918	1918-06-09	1918-08-26
1919	1919-06-10	1919-09-12
1921	1921-06-11	1921-09-02
1922	1922-06-05	1922-09-05
1943	1943-05-28	1943-09-26
1944	1944-05-13	1944-09-07
1946	1946-06-06	1946-10-01
1947	1947-06-08	1947-10-05
1948	1948-05-17	1948-09-19
1949	1949-04-30	1949-09-17
1950	1950-06-06	1950-09-07
1951	1951-07-15	1951-08-30
1952	1952-05-04	1952-09-28
1953	1953-06-02	1953-10-02
1954	1954-05-21	1954-09-23
1955	1955-05-03	1955-09-15
1956	1956-06-02	1956-09-27
1957	1957-07-06	1957-08-21
1958	1958-07-23	1958-09-22
1959	1959-06-05	1959-09-14
1960	1960-06-20	1960-09-20
1961	1961-06-09	1961-08-29
1962	1962-06-27	1962-08-27
1963	1963-06-21	1963-09-13
1964	1964-05-20	1964-07-31
1966	1966-06-20	1966-09-11
1967	1967-06-30	1967-08-29
1968	1968-06-03	1968-08-08
1969	1969-05-26	1969-09-03
1970	1970-06-22	1970-09-04
1971	1971-06-23	1971-09-03
1972	1972-05-17	1972-08-16
1973	1973-06-09	1973-08-31
1974	1974-06-19	1974-08-19
1975	1975-06-24	1975-08-31
1976	1976-06-09	1976-09-06
1977	1977-06-02	1977-08-24
1978	1978-05-15	1978-09-10
1979	1979-06-12	1979-09-09
1980	1980-04-22	1980-09-07
1981	1981-06-06	1981-09-12
1982	1982-07-15	1982-09-10
1988	1988-06-04	1988-08-20
1989	1989-06-19	1989-09-05
1991	1991-06-11	1991-09-06
1992	1992-05-07	1992-10-01
1998	1998-07-04	1998-09-18

Every Fixed Threshold

Fixed thresholds at Deadwood
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	54	50	1919	30
35 C (95 F): Days	39	13	1949	3
90 F (32.2 C): Days	53	32	1988	9
100 F (37.8 C): Days	13	4	1949	1
0 C (32 F): Ice days (max	54	71	1978	30
0 C (32 F): Frost days (min	62	222	1912	161
-10 C (14 F): Days with min	62	95	1955	21
-20 C (-4 F): Days with min	62	35	1916	2
-30 C (-22 F): Days with min	20	4	1916	4
20 C (68 F): Tropical nights (min	31	5	1919	1
25 C (77 F): Days with min	1	1	1989	1
10 mm (0.39 in): Days with 10 mm or more rain	62	37	1915	22
25 mm (0.98 in): Days with 25 mm or more rain	59	15	1922	8
50 mm (1.97 in): Days with 50 mm or more rain	38	5	1946	2
100 mm (3.94 in): Days with 100 mm or more rain	7	2	1976	1
10 cm (3.9 in): Days with 10 cm or more snowfall	51	24	1953	5
25 cm (9.8 in): Days with 25 cm or more snowfall	36	5	1953	3
50 cm (19.7 in): Days with 50 cm or more snowfall	11	2	1944	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1911.

Download the Data

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 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Deadwood Threshold Days by Year (USC00392207)

Key Facts for Deadwood Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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