Blewett Pass Weather Records (USC00450749)

Record envelope, standing records and threshold days for Blewett Pass (USC00450749), Washington, United States, with 41 years of record.

Key Facts for Blewett Pass

Blewett Pass (USC00450749) is a weather station in Washington, United States at 47.35 latitude and -120.67 longitude, 1,241 m (4,072 ft) above sea level.
The station reports from 1909 to 1949, 41 years of record.
1,464 records set at Blewett Pass 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, 47.35 latitude, -120.67 longitude.
Elevation: 1,241 m (4,072 ft).
Period of record: 1909 to 1949, 41 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 Blewett Pass. 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 Blewett Pass, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	10.0 C (50.0 F)	-26.1 C (-15.0 F)	n/a	n/a
Feb	10.6 C (51.1 F)	-26.7 C (-16.1 F)	n/a	n/a
Mar	20.6 C (69.1 F)	-12.8 C (9.0 F)	n/a	n/a
Apr	25.0 C (77.0 F)	-12.2 C (10.0 F)	n/a	n/a
May	32.2 C (90.0 F)	-4.4 C (24.1 F)	n/a	n/a
Jun	31.7 C (89.1 F)	-3.9 C (25.0 F)	n/a	n/a
Jul	38.3 C (100.9 F)	0.0 C (32.0 F)	n/a	n/a
Aug	35.0 C (95.0 F)	-0.6 C (30.9 F)	n/a	n/a
Sep	31.1 C (88.0 F)	-3.3 C (26.1 F)	n/a	n/a
Oct	26.1 C (79.0 F)	-13.3 C (8.1 F)	n/a	n/a
Nov	15.6 C (60.1 F)	-16.7 C (1.9 F)	n/a	n/a
Dec	10.6 C (51.1 F)	-22.8 C (-9.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Blewett Pass still stand. 1930 holds the most, with 111.

Standing records at Blewett Pass by the year they were set
Year set	Standing records
1926	4
1927	13
1928	92
1929	98
1930	111
1931	93
1932	111
1933	107
1934	108
1935	96
1936	97
1937	75
1938	70
1939	87
1940	71
1941	56
1942	72
1945	9
1946	32
1947	4
1948	38
1949	20

Wettest Day of Each Month

Dec: 178.6 mm (7.0 in)

The wettest day on record for each calendar month at Blewett Pass. The most was 178.6 mm (7.0 in) on 30 December 1920.

Record daily precipitation for each month at Blewett Pass
Month	Record daily precipitation (mm)	Date
Jan	61.0 mm (2.4 in)	24 January 1946
Feb	76.2 mm (3.0 in)	23 February 1925
Mar	59.7 mm (2.4 in)	18 March 1938
Apr	76.2 mm (3.0 in)	15 April 1925
May	28.4 mm (1.1 in)	31 May 1941
Jun	37.8 mm (1.5 in)	7 June 1936
Jul	14.5 mm (0.6 in)	6 July 1948
Aug	37.8 mm (1.5 in)	8 August 1948
Sep	35.1 mm (1.4 in)	27 September 1927
Oct	95.3 mm (3.8 in)	31 October 1942
Nov	55.9 mm (2.2 in)	23 November 1909
Dec	178.6 mm (7.0 in)	30 December 1920

Period of Record Coverage

1926 to 1949

22 years of record at Blewett Pass, 1926 to 1949. 9 years have data for under 90 percent of days and are left out of rankings: 1926, 1927, 1941, 1942, 1945, 1946, 1947, 1948 and others.

Days with data per year at Blewett Pass
Year	Days with data	Share of year	Complete
1926	2	1%	No
1927	77	21%	No
1928	360	98%	Yes
1929	362	99%	Yes
1930	365	100%	Yes
1931	361	99%	Yes
1932	364	99%	Yes
1933	360	99%	Yes
1934	329	90%	Yes
1935	363	99%	Yes
1936	363	99%	Yes
1937	361	99%	Yes
1938	362	99%	Yes
1939	365	100%	Yes
1940	365	100%	Yes
1941	315	86%	No
1942	304	83%	No
1945	43	12%	No
1946	243	67%	No
1947	21	6%	No
1948	226	62%	No
1949	137	38%	No

Latest Records

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

Climate Trend

12 complete years, 1928 to 1940

One stripe for each of 12 complete years at Blewett Pass, 1928 to 1940. Blue stripes are years cooler than the station's own mean of 6.0 C (42.8 F); red stripes are warmer. The coolest year was 1930, at 5.2 C (41.4 F), and the warmest was 1940, at 7.2 C (45.0 F). The strongest colour marks a difference of 1.2 C (2.2 F).

Annual mean temperature at Blewett Pass as warming stripes, 1928 to 1940
Year	Annual mean temperature	Difference from the station mean
1928	6.2 C	+0.19 C
1929	5.7 C	-0.28 C
1930	5.2 C	-0.81 C
1931	5.8 C	-0.25 C
1932	5.4 C	-0.60 C
1933	5.5 C	-0.52 C
1935	5.9 C	-0.13 C
1936	6.1 C	+0.10 C
1937	5.6 C	-0.38 C
1938	6.5 C	+0.44 C
1939	7.1 C	+1.09 C
1940	7.2 C	+1.20 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

1909 to 1949

Yearly extremes at Blewett Pass: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	38.3 C (100.9 F)	1928	33.3 C (91.9 F)	22
Coldest night (TNn)	-26.7 C (-16.1 F)	1936	-20.0 C (-4.0 F)	22
Wettest day (Rx1day)	178.6 mm (7.0 in)	1920	40.6 mm (1.6 in)	39
Wettest five days (Rx5day)	184.9 mm (7.3 in)	1933	68.1 mm (2.7 in)	39
Longest dry spell (CDD)	67 days	1931	20 days	38

Hottest day (TXx)

The hottest day of the year at Blewett Pass, 1909 to 1949. The record is 38.3 C (100.9 F) in 1928, marked on the chart; the median year is 33.3 C (91.9 F).

Hottest day (TXx) at Blewett Pass by year
Year	Hottest day (TXx)
1909	n/a
1910	n/a
1911	n/a
1912	n/a
1913	n/a
1914	n/a
1915	n/a
1916	n/a
1917	n/a
1918	n/a
1919	n/a
1920	n/a
1921	n/a
1922	n/a
1923	n/a
1924	n/a
1925	n/a
1926	-1.1 C (30.0 F)
1927	19.4 C (66.9 F)
1928	38.3 C (100.9 F)
1929	33.9 C (93.0 F)
1930	32.8 C (91.0 F)
1931	32.8 C (91.0 F)
1932	32.8 C (91.0 F)
1933	33.9 C (93.0 F)
1934	33.3 C (91.9 F)
1935	33.9 C (93.0 F)
1936	35.0 C (95.0 F)
1937	33.3 C (91.9 F)
1938	36.7 C (98.1 F)
1939	37.8 C (100.0 F)
1940	32.2 C (90.0 F)
1941	34.4 C (93.9 F)
1942	35.0 C (95.0 F)
1945	2.2 C (36.0 F)
1946	33.3 C (91.9 F)
1947	5.0 C (41.0 F)
1948	31.1 C (88.0 F)
1949	17.8 C (64.0 F)

Coldest night (TNn)

The coldest night of the year at Blewett Pass, 1909 to 1949. The record is -26.7 C (-16.1 F) in 1936, marked on the chart; the median year is -20.0 C (-4.0 F).

Coldest night (TNn) at Blewett Pass by year
Year	Coldest night (TNn)
1909	n/a
1910	n/a
1911	n/a
1912	n/a
1913	n/a
1914	n/a
1915	n/a
1916	n/a
1917	n/a
1918	n/a
1919	n/a
1920	n/a
1921	n/a
1922	n/a
1923	n/a
1924	n/a
1925	n/a
1926	-8.9 C (16.0 F)
1927	-22.8 C (-9.0 F)
1928	-21.7 C (-7.1 F)
1929	-23.3 C (-9.9 F)
1930	-21.7 C (-7.1 F)
1931	-15.6 C (3.9 F)
1932	-20.6 C (-5.1 F)
1933	-26.1 C (-15.0 F)
1934	-11.7 C (10.9 F)
1935	-26.1 C (-15.0 F)
1936	-26.7 C (-16.1 F)
1937	-22.8 C (-9.0 F)
1938	-15.0 C (5.0 F)
1939	-20.6 C (-5.1 F)
1940	-15.0 C (5.0 F)
1941	-16.1 C (3.0 F)
1942	-21.7 C (-7.1 F)
1945	-16.7 C (1.9 F)
1946	-11.7 C (10.9 F)
1947	-8.3 C (17.1 F)
1948	-16.7 C (1.9 F)
1949	-19.4 C (-2.9 F)

Wettest day (Rx1day)

The wettest day of the year at Blewett Pass, 1909 to 1949. The record is 178.6 mm (7.0 in) in 1920, marked on the chart; the median year is 40.6 mm (1.6 in).

Wettest day (Rx1day) at Blewett Pass by year
Year	Wettest day (Rx1day)
1909	55.9 mm (2.2 in)
1910	52.1 mm (2.1 in)
1911	35.6 mm (1.4 in)
1912	30.5 mm (1.2 in)
1913	25.4 mm (1.0 in)
1914	27.9 mm (1.1 in)
1915	30.5 mm (1.2 in)
1916	25.4 mm (1.0 in)
1917	57.2 mm (2.3 in)
1918	40.6 mm (1.6 in)
1919	25.4 mm (1.0 in)
1920	178.6 mm (7.0 in)
1921	38.1 mm (1.5 in)
1922	30.5 mm (1.2 in)
1923	45.7 mm (1.8 in)
1924	43.2 mm (1.7 in)
1925	76.2 mm (3.0 in)
1926	25.4 mm (1.0 in)
1927	42.4 mm (1.7 in)
1928	17.3 mm (0.7 in)
1929	18.3 mm (0.7 in)
1930	29.0 mm (1.1 in)
1931	28.4 mm (1.1 in)
1932	111.8 mm (4.4 in)
1933	89.4 mm (3.5 in)
1934	47.8 mm (1.9 in)
1935	36.8 mm (1.4 in)
1936	43.9 mm (1.7 in)
1937	38.1 mm (1.5 in)
1938	59.7 mm (2.4 in)
1939	23.4 mm (0.9 in)
1940	30.5 mm (1.2 in)
1941	41.9 mm (1.6 in)
1942	95.3 mm (3.8 in)
1945	53.3 mm (2.1 in)
1946	61.0 mm (2.4 in)
1947	6.4 mm (0.25 in)
1948	43.2 mm (1.7 in)
1949	47.5 mm (1.9 in)

Wettest five days (Rx5day)

The wettest five days of the year at Blewett Pass, 1909 to 1949. The record is 184.9 mm (7.3 in) in 1933, marked on the chart; the median year is 68.1 mm (2.7 in).

Wettest five days (Rx5day) at Blewett Pass by year
Year	Wettest five days (Rx5day)
1909	134.6 mm (5.3 in)
1910	131.1 mm (5.2 in)
1911	89.0 mm (3.5 in)
1912	68.6 mm (2.7 in)
1913	71.1 mm (2.8 in)
1914	103.3 mm (4.1 in)
1915	61.0 mm (2.4 in)
1916	39.4 mm (1.6 in)
1917	138.0 mm (5.4 in)
1918	48.4 mm (1.9 in)
1919	63.5 mm (2.5 in)
1920	49.2 mm (1.9 in)
1921	60.9 mm (2.4 in)
1922	45.6 mm (1.8 in)
1923	142.2 mm (5.6 in)
1924	38.1 mm (1.5 in)
1925	40.9 mm (1.6 in)
1926	39.1 mm (1.5 in)
1927	55.2 mm (2.2 in)
1928	49.5 mm (1.9 in)
1929	38.4 mm (1.5 in)
1930	54.1 mm (2.1 in)
1931	45.8 mm (1.8 in)
1932	76.5 mm (3.0 in)
1933	184.9 mm (7.3 in)
1934	108.7 mm (4.3 in)
1935	88.9 mm (3.5 in)
1936	122.1 mm (4.8 in)
1937	112.8 mm (4.4 in)
1938	52.4 mm (2.1 in)
1939	79.0 mm (3.1 in)
1940	68.1 mm (2.7 in)
1941	84.3 mm (3.3 in)
1942	32.6 mm (1.3 in)
1945	82.5 mm (3.2 in)
1946	111.8 mm (4.4 in)
1947	7.9 mm (0.31 in)
1948	53.8 mm (2.1 in)
1949	82.0 mm (3.2 in)

Longest dry spell (CDD)

The longest dry spell of the year at Blewett Pass, 1909 to 1949. The record is 67 days in 1931, marked on the chart; the median year is 20 days.

Longest dry spell (CDD) at Blewett Pass by year
Year	Longest dry spell (CDD)
1909	13 days
1910	19 days
1911	19 days
1912	10 days
1913	11 days
1914	16 days
1915	18 days
1916	17 days
1917	15 days
1918	21 days
1919	16 days
1920	15 days
1921	13 days
1922	13 days
1923	16 days
1924	n/a
1925	8 days
1926	20 days
1927	53 days
1928	38 days
1929	44 days
1930	66 days
1931	67 days
1932	30 days
1933	31 days
1934	37 days
1935	37 days
1936	38 days
1937	30 days
1938	31 days
1939	9 days
1940	14 days
1941	34 days
1942	33 days
1945	11 days
1946	47 days
1947	2 days
1948	31 days
1949	30 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 Blewett Pass standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Blewett Pass 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 2026-10-13 (13 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).