Inchelium 2 NW Weather Records (USC00453903)

Record envelope, standing records and threshold days for Inchelium 2 NW (USC00453903), Washington, United States, with 36 years of record.

Key Facts for Inchelium 2 NW

Inchelium 2 NW (USC00453903) is a weather station in Washington, United States at 48.32 latitude and -118.22 longitude, 515 m (1,690 ft) above sea level.
The station reports from 1940 to 1975, 36 years of record.
1,464 records set at Inchelium 2 NW still stand.
Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

Location: Washington, United States, 48.32 latitude, -118.22 longitude.
Elevation: 515 m (1,690 ft).
Period of record: 1940 to 1975, 36 years.
Eligible elements: none yet.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at Inchelium 2 NW. 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 Inchelium 2 NW, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	12.2 C (54.0 F)	-32.2 C (-26.0 F)	n/a	n/a
Feb	15.0 C (59.0 F)	-26.7 C (-16.1 F)	n/a	n/a
Mar	22.8 C (73.0 F)	-21.7 C (-7.1 F)	n/a	n/a
Apr	29.4 C (84.9 F)	-7.2 C (19.0 F)	n/a	n/a
May	33.9 C (93.0 F)	-6.7 C (19.9 F)	n/a	n/a
Jun	36.7 C (98.1 F)	-0.6 C (30.9 F)	n/a	n/a
Jul	39.4 C (102.9 F)	-0.6 C (30.9 F)	n/a	n/a
Aug	40.6 C (105.1 F)	0.0 C (32.0 F)	n/a	n/a
Sep	36.1 C (97.0 F)	-3.9 C (25.0 F)	n/a	n/a
Oct	27.2 C (81.0 F)	-8.9 C (16.0 F)	n/a	n/a
Nov	16.7 C (62.1 F)	-18.3 C (-0.9 F)	n/a	n/a
Dec	14.4 C (57.9 F)	-28.9 C (-20.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Inchelium 2 NW still stand. 1956 holds the most, with 100.

Standing records at Inchelium 2 NW by the year they were set
Year set	Standing records
1940	91
1941	27
1953	38
1954	74
1955	88
1956	100
1957	75
1958	57
1959	56
1960	65
1961	70
1962	79
1963	65
1964	48
1965	39
1966	49
1967	52
1968	61
1969	41
1970	46
1971	63
1972	81
1973	47
1974	37
1975	15

Wettest Day of Each Month

Feb: 50.5 mm (2.0 in)

The wettest day on record for each calendar month at Inchelium 2 NW. The most was 50.5 mm (2.0 in) on 25 February 1958.

Record daily precipitation for each month at Inchelium 2 NW
Month	Record daily precipitation (mm)	Date
Jan	22.1 mm (0.9 in)	15 January 1974
Feb	50.5 mm (2.0 in)	25 February 1958
Mar	25.1 mm (1.0 in)	11 March 1957
Apr	22.9 mm (0.9 in)	10 April 1965
May	26.4 mm (1.0 in)	11 May 1962
Jun	19.1 mm (0.8 in)	7 June 1961
Jul	24.1 mm (0.9 in)	23 July 1961
Aug	22.9 mm (0.9 in)	23 August 1975
Sep	31.0 mm (1.2 in)	5 September 1940
Oct	37.6 mm (1.5 in)	24 October 1940
Nov	45.7 mm (1.8 in)	23 November 1960
Dec	27.4 mm (1.1 in)	13 December 1966

Period of Record Coverage

1940 to 1975

25 years of record at Inchelium 2 NW, 1940 to 1975. 6 years have data for under 90 percent of days and are left out of rankings: 1941, 1953, 1958, 1965, 1974, 1975.

Days with data per year at Inchelium 2 NW
Year	Days with data	Share of year	Complete
1940	356	97%	Yes
1941	112	31%	No
1953	221	61%	No
1954	357	98%	Yes
1955	360	99%	Yes
1956	364	99%	Yes
1957	364	100%	Yes
1958	243	67%	No
1959	332	91%	Yes
1960	364	99%	Yes
1961	362	99%	Yes
1962	359	98%	Yes
1963	353	97%	Yes
1964	363	99%	Yes
1965	328	90%	No
1966	359	98%	Yes
1967	352	96%	Yes
1968	365	100%	Yes
1969	362	99%	Yes
1970	361	99%	Yes
1971	361	99%	Yes
1972	363	99%	Yes
1973	329	90%	Yes
1974	266	73%	No
1975	124	34%	No

Latest Records

No records were set at this station in the latest data.

Climate Trend

17 complete years, 1940 to 1972

One stripe for each of 17 complete years at Inchelium 2 NW, 1940 to 1972. Blue stripes are years cooler than the station's own mean of 7.9 C (46.2 F); red stripes are warmer. The coolest year was 1955, at 7.0 C (44.6 F), and the warmest was 1940, at 9.2 C (48.6 F). The strongest colour marks a difference of 1.4 C (2.5 F).

Annual mean temperature at Inchelium 2 NW as warming stripes, 1940 to 1972
Year	Annual mean temperature	Difference from the station mean
1940	9.2 C	+1.31 C
1954	7.8 C	-0.10 C
1955	7.0 C	-0.93 C
1956	7.5 C	-0.43 C
1957	7.5 C	-0.37 C
1960	7.6 C	-0.28 C
1961	8.5 C	+0.58 C
1962	7.8 C	-0.10 C
1963	8.6 C	+0.68 C
1964	7.3 C	-0.61 C
1966	8.5 C	+0.61 C
1967	8.9 C	+0.95 C
1968	8.0 C	+0.05 C
1969	7.5 C	-0.37 C
1970	7.8 C	-0.10 C
1971	7.4 C	-0.51 C
1972	7.5 C	-0.41 C

This station does not have enough complete years (30 are needed) to fit a temperature trend.

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

1940 to 1975

Yearly extremes at Inchelium 2 NW: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	40.6 C (105.1 F)	1961	37.2 C (99.0 F)	25
Coldest night (TNn)	-32.2 C (-26.0 F)	1957	-21.7 C (-7.1 F)	25
Wettest day (Rx1day)	50.5 mm (2.0 in)	1958	23.4 mm (0.9 in)	25
Wettest five days (Rx5day)	107.7 mm (4.2 in)	1960	45.2 mm (1.8 in)	25
Longest dry spell (CDD)	75 days	1967	37 days	25

Hottest day (TXx)

The hottest day of the year at Inchelium 2 NW, 1940 to 1975. The record is 40.6 C (105.1 F) in 1961, marked on the chart; the median year is 37.2 C (99.0 F).

Hottest day (TXx) at Inchelium 2 NW by year
Year	Hottest day (TXx)
1940	38.9 C (102.0 F)
1941	27.2 C (81.0 F)
1953	36.7 C (98.1 F)
1954	34.4 C (93.9 F)
1955	36.1 C (97.0 F)
1956	38.3 C (100.9 F)
1957	33.3 C (91.9 F)
1958	38.9 C (102.0 F)
1959	36.7 C (98.1 F)
1960	39.4 C (102.9 F)
1961	40.6 C (105.1 F)
1962	36.7 C (98.1 F)
1963	36.1 C (97.0 F)
1964	37.2 C (99.0 F)
1965	36.7 C (98.1 F)
1966	36.7 C (98.1 F)
1967	37.8 C (100.0 F)
1968	37.8 C (100.0 F)
1969	37.2 C (99.0 F)
1970	37.2 C (99.0 F)
1971	38.9 C (102.0 F)
1972	38.9 C (102.0 F)
1973	37.8 C (100.0 F)
1974	36.1 C (97.0 F)
1975	32.2 C (90.0 F)

Coldest night (TNn)

The coldest night of the year at Inchelium 2 NW, 1940 to 1975. The record is -32.2 C (-26.0 F) in 1957, marked on the chart; the median year is -21.7 C (-7.1 F).

Coldest night (TNn) at Inchelium 2 NW by year
Year	Coldest night (TNn)
1940	-16.7 C (1.9 F)
1941	-12.8 C (9.0 F)
1953	-9.4 C (15.1 F)
1954	-25.6 C (-14.1 F)
1955	-21.7 C (-7.1 F)
1956	-26.7 C (-16.1 F)
1957	-32.2 C (-26.0 F)
1958	-9.4 C (15.1 F)
1959	-16.1 C (3.0 F)
1960	-23.3 C (-9.9 F)
1961	-22.8 C (-9.0 F)
1962	-28.9 C (-20.0 F)
1963	-20.6 C (-5.1 F)
1964	-27.2 C (-17.0 F)
1965	-16.1 C (3.0 F)
1966	-19.4 C (-2.9 F)
1967	-20.0 C (-4.0 F)
1968	-28.9 C (-20.0 F)
1969	-30.0 C (-22.0 F)
1970	-21.7 C (-7.1 F)
1971	-21.1 C (-6.0 F)
1972	-23.9 C (-11.0 F)
1973	-20.0 C (-4.0 F)
1974	-25.0 C (-13.0 F)
1975	-9.4 C (15.1 F)

Wettest day (Rx1day)

The wettest day of the year at Inchelium 2 NW, 1940 to 1975. The record is 50.5 mm (2.0 in) in 1958, marked on the chart; the median year is 23.4 mm (0.9 in).

Wettest day (Rx1day) at Inchelium 2 NW by year
Year	Wettest day (Rx1day)
1940	37.6 mm (1.5 in)
1941	14.5 mm (0.6 in)
1953	17.8 mm (0.7 in)
1954	23.4 mm (0.9 in)
1955	19.1 mm (0.8 in)
1956	25.4 mm (1.0 in)
1957	25.1 mm (1.0 in)
1958	50.5 mm (2.0 in)
1959	18.5 mm (0.7 in)
1960	45.7 mm (1.8 in)
1961	24.1 mm (0.9 in)
1962	26.4 mm (1.0 in)
1963	19.6 mm (0.8 in)
1964	21.3 mm (0.8 in)
1965	23.6 mm (0.9 in)
1966	36.1 mm (1.4 in)
1967	27.2 mm (1.1 in)
1968	32.0 mm (1.3 in)
1969	18.3 mm (0.7 in)
1970	19.8 mm (0.8 in)
1971	24.9 mm (1.0 in)
1972	19.3 mm (0.8 in)
1973	18.8 mm (0.7 in)
1974	22.1 mm (0.9 in)
1975	22.9 mm (0.9 in)

Wettest five days (Rx5day)

The wettest five days of the year at Inchelium 2 NW, 1940 to 1975. The record is 107.7 mm (4.2 in) in 1960, marked on the chart; the median year is 45.2 mm (1.8 in).

Wettest five days (Rx5day) at Inchelium 2 NW by year
Year	Wettest five days (Rx5day)
1940	50.5 mm (2.0 in)
1941	33.6 mm (1.3 in)
1953	28.0 mm (1.1 in)
1954	52.9 mm (2.1 in)
1955	34.6 mm (1.4 in)
1956	44.7 mm (1.8 in)
1957	51.4 mm (2.0 in)
1958	87.1 mm (3.4 in)
1959	41.6 mm (1.6 in)
1960	107.7 mm (4.2 in)
1961	45.2 mm (1.8 in)
1962	53.6 mm (2.1 in)
1963	38.0 mm (1.5 in)
1964	38.0 mm (1.5 in)
1965	50.0 mm (2.0 in)
1966	60.5 mm (2.4 in)
1967	38.8 mm (1.5 in)
1968	56.4 mm (2.2 in)
1969	48.0 mm (1.9 in)
1970	43.5 mm (1.7 in)
1971	37.9 mm (1.5 in)
1972	31.7 mm (1.2 in)
1973	47.7 mm (1.9 in)
1974	56.2 mm (2.2 in)
1975	24.4 mm (1.0 in)

Longest dry spell (CDD)

The longest dry spell of the year at Inchelium 2 NW, 1940 to 1975. The record is 75 days in 1967, marked on the chart; the median year is 37 days.

Longest dry spell (CDD) at Inchelium 2 NW by year
Year	Longest dry spell (CDD)
1940	12 days
1941	16 days
1953	26 days
1954	31 days
1955	46 days
1956	32 days
1957	37 days
1958	54 days
1959	45 days
1960	48 days
1961	50 days
1962	50 days
1963	27 days
1964	29 days
1965	32 days
1966	39 days
1967	75 days
1968	24 days
1969	72 days
1970	31 days
1971	41 days
1972	32 days
1973	74 days
1974	44 days
1975	33 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.

Download the Data

Data for Inchelium 2 NW standing records by year: CSV or JSON. Field meanings are on the data page.
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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

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