Douglas Smelter Threshold Days by Year (USC00022669)

17 fixed thresholds counted per year at Douglas Smelter (USC00022669): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Douglas Smelter Thresholds

Douglas Smelter: nights with a minimum temperature at or below 0 C (32 F) in 69 years, most in 1912 with 114.
Douglas Smelter: nights with a minimum temperature at or above 20 C (68 F) in 69 years, most in 1937 with 44.
Douglas Smelter: days with 10 mm (0.39 in) or more of precipitation in 69 years, most in 1914 with 21.
Douglas Smelter: days with a maximum temperature at or above 30 C (86 F) in 63 years, most in 1910 with 183.
17 fixed thresholds have at least one qualifying day at Douglas Smelter.

Days at or above 30 C (86 F)

63 years with a qualifying day

Days per year at Douglas Smelter with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 183 in 1910.

Days at or above 30 C (86 F) per year at Douglas Smelter
Year	Days	Decade average
1904	163	149
1905	141	149
1906	152	149
1907	140	149
1908	140	149
1909	158	149
1910	183	139.2
1911	161	139.2
1912	136	139.2
1913	152	139.2
1914	74	139.2
1915	145	139.2
1916	171	139.2
1917	134	139.2
1918	129	139.2
1919	107	139.2
1920	122	135.9
1921	126	135.9
1922	143	135.9
1923	129	135.9
1924	146	135.9
1925	154	135.9
1926	126	135.9
1927	141	135.9
1930	127	141.8
1931	140	141.8
1932	129	141.8
1933	133	141.8
1934	152	141.8
1935	126	141.8
1936	159	141.8
1937	161	141.8
1938	143	141.8
1939	148	141.8
1940	141	146.7
1941	125	146.7
1942	142	146.7
1943	159	146.7
1948	163	146.7
1949	150	146.7
1950	172	152.9
1951	159	152.9
1952	171	152.9
1953	151	152.9
1954	166	152.9
1955	140	152.9
1956	158	152.9
1957	130	152.9
1958	137	152.9
1959	145	152.9
1960	152	142
1961	152	142
1962	153	142
1963	166	142
1964	134	142
1965	136	142
1966	109	142
1967	139	142
1968	131	142
1969	148	142
1970	133	138
1971	131	138
1972	150	138

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

First to last qualifying date each year at Douglas Smelter
Year	First date	Last date
1904	1904-02-23	1904-10-14
1905	1905-05-07	1905-10-11
1906	1906-04-10	1906-11-15
1907	1907-03-17	1907-10-15
1908	1908-03-14	1908-10-14
1909	1909-04-02	1909-11-04
1910	1910-03-02	1910-11-02
1911	1911-03-08	1911-11-15
1912	1912-02-19	1912-09-28
1913	1913-03-30	1913-10-24
1914	1914-04-06	1914-10-13
1915	1915-04-12	1915-11-20
1916	1916-03-10	1916-11-02
1917	1917-03-28	1917-10-22
1918	1918-04-10	1918-10-15
1919	1919-05-03	1919-09-22
1920	1920-05-07	1920-10-10
1921	1921-04-19	1921-10-22
1922	1922-05-06	1922-10-12
1923	1923-05-03	1923-10-12
1924	1924-05-09	1924-10-21
1925	1925-04-10	1925-10-10
1926	1926-05-15	1926-09-25
1927	1927-04-03	1927-10-15
1930	1930-04-06	1930-10-21
1931	1931-03-22	1931-10-26
1932	1932-04-02	1932-10-16
1933	1933-05-16	1933-10-25
1934	1934-03-29	1934-10-30
1935	1935-04-13	1935-10-14
1936	1936-04-11	1936-10-18
1937	1937-04-14	1937-10-28
1938	1938-04-18	1938-10-18
1939	1939-04-09	1939-10-06
1940	1940-04-19	1940-10-08
1941	1941-05-05	1941-10-13
1942	1942-05-04	1942-10-10
1943	1943-03-28	1943-10-27
1948	1948-04-09	1948-10-16
1949	1949-04-23	1949-10-15
1950	1950-03-23	1950-11-09
1951	1951-04-24	1951-10-21
1952	1952-04-06	1952-10-28
1953	1953-03-29	1953-10-18
1954	1954-04-06	1954-10-23
1955	1955-05-05	1955-10-20
1956	1956-03-26	1956-10-23
1957	1957-02-14	1957-10-03
1958	1958-04-19	1958-10-12
1959	1959-04-03	1959-10-26
1960	1960-03-07	1960-10-08
1961	1961-04-04	1961-10-21
1962	1962-04-12	1962-10-23
1963	1963-03-26	1963-10-29
1964	1964-04-15	1964-10-30
1965	1965-04-16	1965-10-14
1966	1966-04-02	1966-10-11
1967	1967-03-17	1967-10-26
1968	1968-05-01	1968-10-29
1969	1969-03-30	1969-10-17
1970	1970-05-04	1970-10-15
1971	1971-03-23	1971-10-15
1972	1972-03-07	1972-10-17

Every Fixed Threshold

Fixed thresholds at Douglas Smelter
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	63	183	1910	150
35 C (95 F): Days	63	97	1910	43
40 C (104 F): Days	46	14	1910	8
90 F (32.2 C): Days	63	147	1910	96
100 F (37.8 C): Days	62	39	1910	14
110 F (43.3 C): Days	2	1	1905	1
0 C (32 F): Ice days (max	1	1	1949	1
0 C (32 F): Frost days (min	69	114	1912	87
-10 C (14 F): Days with min	36	8	1911	5
-20 C (-4 F): Days with min	1	1	1913	1
20 C (68 F): Tropical nights (min	69	44	1937	24
25 C (77 F): Days with min	8	6	1936	1
10 mm (0.39 in): Days with 10 mm or more rain	69	21	1914	8
25 mm (0.98 in): Days with 25 mm or more rain	57	5	1950	4
50 mm (1.97 in): Days with 50 mm or more rain	9	1	1906	1
10 cm (3.9 in): Days with 10 cm or more snowfall	8	2	1909	1
25 cm (9.8 in): Days with 25 cm or more snowfall	1	1	1916	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1904.

Download the Data

Data for Douglas Smelter 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).

Douglas Smelter Threshold Days by Year (USC00022669)

Key Facts for Douglas Smelter Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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