Inchelium 2 NW Threshold Days by Year (USC00453903)

16 fixed thresholds counted per year at Inchelium 2 NW (USC00453903): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Inchelium 2 NW Thresholds

Inchelium 2 NW: nights with a minimum temperature at or below 0 C (32 F) in 20 years, most in 1960 with 189.
Inchelium 2 NW: nights with a minimum temperature at or below -10 C (14 F) in 20 years, most in 1956 with 44.
Inchelium 2 NW: days with a maximum temperature at or above 30 C (86 F) in 19 years, most in 1940 with 64.
Inchelium 2 NW: days with a maximum temperature at or above 90 F (32.2 C) in 19 years, most in 1961 with 44.
16 fixed thresholds have at least one qualifying day at Inchelium 2 NW.

Days at or above 30 C (86 F)

19 years with a qualifying day

Days per year at Inchelium 2 NW with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 64 in 1940.

Days at or above 30 C (86 F) per year at Inchelium 2 NW
Year	Days	Decade average
1940	64	64
1954	23	38.2
1955	46	38.2
1956	54	38.2
1957	35	38.2
1959	33	38.2
1960	46	43.8
1961	61	43.8
1962	35	43.8
1963	39	43.8
1964	25	43.8
1966	43	43.8
1967	62	43.8
1968	36	43.8
1969	47	43.8
1970	55	45.8
1971	41	45.8
1972	36	45.8
1973	51	45.8

For each year, a bar from the first to the last day at Inchelium 2 NW meeting 30 C (86 F).

First to last qualifying date each year at Inchelium 2 NW
Year	First date	Last date
1940	1940-05-22	1940-09-11
1954	1954-05-18	1954-08-30
1955	1955-06-09	1955-09-10
1956	1956-05-17	1956-09-18
1957	1957-05-09	1957-09-16
1959	1959-06-19	1959-09-13
1960	1960-06-24	1960-09-15
1961	1961-06-02	1961-08-30
1962	1962-06-24	1962-09-21
1963	1963-06-14	1963-09-10
1964	1964-07-01	1964-08-23
1966	1966-05-04	1966-09-22
1967	1967-06-15	1967-09-28
1968	1968-06-18	1968-09-05
1969	1969-05-23	1969-09-13
1970	1970-06-02	1970-09-02
1971	1971-06-22	1971-08-30
1972	1972-05-29	1972-09-05
1973	1973-05-14	1973-09-12

Every Fixed Threshold

Fixed thresholds at Inchelium 2 NW
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	19	64	1940	51
35 C (95 F): Days	17	19	1961	19
40 C (104 F): Days	1	1	1961	1
90 F (32.2 C): Days	19	44	1961	37
100 F (37.8 C): Days	9	3	1956	1
0 C (32 F): Ice days (max	19	47	1960	23
0 C (32 F): Frost days (min	20	189	1960	152
-10 C (14 F): Days with min	20	44	1956	17
-20 C (-4 F): Days with min	16	20	1957	1
-30 C (-22 F): Days with min	2	2	1957	1
20 C (68 F): Tropical nights (min	1	1	1955	1
10 mm (0.39 in): Days with 10 mm or more rain	19	20	1955	11
25 mm (0.98 in): Days with 25 mm or more rain	7	3	1960	1
10 cm (3.9 in): Days with 10 cm or more snowfall	18	10	1970	6
25 cm (9.8 in): Days with 25 cm or more snowfall	1	0	n/a	1
50 cm (19.7 in): Days with 50 cm or more snowfall	1	0	n/a	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1940.

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Data for Inchelium 2 NW 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).

Inchelium 2 NW Threshold Days by Year (USC00453903)

Key Facts for Inchelium 2 NW Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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