Colville AP Threshold Days by Year (USC00451650)

15 fixed thresholds counted per year at Colville AP (USC00451650): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Colville AP Thresholds

Colville AP: days with a maximum temperature at or above 30 C (86 F) in 45 years, most in 1958 with 73.
Colville AP: days with a maximum temperature at or above 90 F (32.2 C) in 45 years, most in 1958 with 60.
Colville AP: days with a maximum temperature at or below 0 C (32 F) in 45 years, most in 1985 with 75.
Colville AP: nights with a minimum temperature at or below 0 C (32 F) in 45 years, most in 1964 with 195.
15 fixed thresholds have at least one qualifying day at Colville AP.

Days at or above 30 C (86 F)

45 years with a qualifying day

Days per year at Colville AP with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 73 in 1958.

Days at or above 30 C (86 F) per year at Colville AP
Year	Days	Decade average
1938	68	68
1940	58	38.4
1941	44	38.4
1942	41	38.4
1943	41	38.4
1944	41	38.4
1945	46	38.4
1946	28	38.4
1947	32	38.4
1948	15	38.4
1951	34	42.6
1952	48	42.6
1953	33	42.6
1954	28	42.6
1955	42	42.6
1956	54	42.6
1957	36	42.6
1958	73	42.6
1959	35	42.6
1960	50	41.6
1961	55	41.6
1962	35	41.6
1963	41	41.6
1964	17	41.6
1965	34	41.6
1966	38	41.6
1967	66	41.6
1968	35	41.6
1969	45	41.6
1970	52	38.2
1971	43	38.2
1972	34	38.2
1973	48	38.2
1974	49	38.2
1975	23	38.2
1976	15	38.2
1977	32	38.2
1979	48	38.2
1980	17	32.1
1981	29	32.1
1982	38	32.1
1983	19	32.1
1984	29	32.1
1985	45	32.1
1986	48	32.1

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

First to last qualifying date each year at Colville AP
Year	First date	Last date
1938	1938-05-23	1938-09-23
1940	1940-05-22	1940-09-11
1941	1941-05-23	1941-08-22
1942	1942-06-29	1942-09-23
1943	1943-06-08	1943-09-25
1944	1944-05-27	1944-09-12
1945	1945-05-30	1945-09-14
1946	1946-06-20	1946-09-01
1947	1947-05-06	1947-09-01
1948	1948-05-27	1948-09-14
1951	1951-05-22	1951-09-18
1952	1952-04-25	1952-09-26
1953	1953-07-06	1953-09-10
1954	1954-05-18	1954-08-30
1955	1955-06-09	1955-09-10
1956	1956-05-16	1956-09-18
1957	1957-05-29	1957-09-25
1958	1958-05-18	1958-09-10
1959	1959-06-02	1959-09-13
1960	1960-06-10	1960-09-14
1961	1961-06-01	1961-08-29
1962	1962-06-24	1962-09-25
1963	1963-06-14	1963-09-11
1964	1964-06-26	1964-08-22
1965	1965-06-09	1965-08-19
1966	1966-05-04	1966-09-22
1967	1967-06-15	1967-09-28
1968	1968-06-18	1968-09-09
1969	1969-05-23	1969-09-12
1970	1970-06-02	1970-08-31
1971	1971-06-22	1971-08-30
1972	1972-05-29	1972-09-04
1973	1973-05-14	1973-09-11
1974	1974-06-11	1974-09-25
1975	1975-07-01	1975-09-15
1976	1976-06-28	1976-09-04
1977	1977-04-23	1977-08-05
1979	1979-06-02	1979-09-19
1980	1980-07-08	1980-08-14
1981	1981-07-03	1981-09-18
1982	1982-06-12	1982-09-03
1983	1983-05-27	1983-08-19
1984	1984-06-28	1984-09-18
1985	1985-05-22	1985-08-29
1986	1986-05-25	1986-09-04

Every Fixed Threshold

Fixed thresholds at Colville AP
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	45	73	1958	48
35 C (95 F): Days	44	32	1958	9
40 C (104 F): Days	5	3	1941	1
90 F (32.2 C): Days	45	60	1958	30
100 F (37.8 C): Days	24	8	1967	2
0 C (32 F): Ice days (max	45	75	1985	26
0 C (32 F): Frost days (min	45	195	1964	121
-10 C (14 F): Days with min	44	51	1985	12
-20 C (-4 F): Days with min	33	16	1957	12
-30 C (-22 F): Days with min	6	3	1968	1
20 C (68 F): Tropical nights (min	3	1	1977	1
10 mm (0.39 in): Days with 10 mm or more rain	45	20	1980	13
25 mm (0.98 in): Days with 25 mm or more rain	16	3	1942	1
10 cm (3.9 in): Days with 10 cm or more snowfall	31	5	1980	2
25 cm (9.8 in): Days with 25 cm or more snowfall	2	1	1962	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1938.

Download the Data

Data for Colville AP 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).

Colville AP Threshold Days by Year (USC00451650)

Key Facts for Colville AP Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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