Willapa Harbor Weather Records (USC00459291)

Record envelope, standing records and threshold days for Willapa Harbor (USC00459291), Washington, United States, with 85 years of record.

Key Facts for Willapa Harbor

Willapa Harbor (USC00459291) is a weather station in Washington, United States at 46.68 latitude and -123.75 longitude, 3 m (10 ft) above sea level.
The station reports from 1895 to 1979, 85 years of record.
1,464 records set at Willapa Harbor still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Willapa Harbor tied a daily record high minimum temperature of 9.4 C (48.9 F) on 19 December 1979.

About the Station

Location: Washington, United States, 46.68 latitude, -123.75 longitude.
Elevation: 3 m (10 ft).
Period of record: 1895 to 1979, 85 years.
Eligible elements: tmax, tmin, prcp, snow.

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 Willapa Harbor. 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 Willapa Harbor, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	21.1 C (70.0 F)	-15.6 C (3.9 F)	n/a	n/a
Feb	23.9 C (75.0 F)	-12.8 C (9.0 F)	n/a	n/a
Mar	28.3 C (82.9 F)	-7.8 C (18.0 F)	n/a	n/a
Apr	32.2 C (90.0 F)	-5.6 C (21.9 F)	n/a	n/a
May	34.4 C (93.9 F)	-5.0 C (23.0 F)	n/a	n/a
Jun	38.9 C (102.0 F)	1.1 C (34.0 F)	n/a	n/a
Jul	39.4 C (102.9 F)	2.2 C (36.0 F)	n/a	n/a
Aug	37.2 C (99.0 F)	1.7 C (35.1 F)	n/a	n/a
Sep	36.1 C (97.0 F)	-0.6 C (30.9 F)	n/a	n/a
Oct	31.7 C (89.1 F)	-7.2 C (19.0 F)	n/a	n/a
Nov	25.6 C (78.1 F)	-11.7 C (10.9 F)	n/a	n/a
Dec	21.1 C (70.0 F)	-15.6 C (3.9 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Willapa Harbor still stand. 1896 holds the most, with 45.

Standing records at Willapa Harbor by the year they were set
Year set	Standing records
1895	38
1896	45
1897	20
1898	16
1899	41
1900	34
1901	20
1902	20
1903	16
1904	31
1905	32
1906	17
1907	11
1908	24
1909	35
1910	17
1911	32
1912	9
1913	33
1914	19
1915	9
1916	29
1917	36
1918	37
1919	19
1920	20
1921	32
1922	29
1923	11
1924	25
1925	19
1926	25
1927	13
1928	13
1929	4
1930	10
1931	19
1932	13
1933	15
1934	27
1935	30
1936	21
1937	12
1938	17
1939	14
1940	18
1941	19
1942	7
1943	10
1944	4
1945	3
1946	5
1947	10
1948	3
1949	15
1950	21
1951	8
1952	15
1953	7
1954	12
1955	26
1956	12
1957	9
1958	26
1959	6
1960	4
1961	14
1962	11
1963	14
1964	4
1965	7
1966	10
1967	19
1968	14
1969	13
1970	9
1971	6
1972	21
1973	8
1974	3
1975	6
1976	3
1977	13
1978	26
1979	14

All-Time Record Progression

1 new records

1 all-time records were set at Willapa Harbor between 14 January 1950 and 14 January 1950. Each dot is a new record.

Wettest Day of Each Month

Mar: 149.9 mm (5.9 in)

The wettest day on record for each calendar month at Willapa Harbor. The most was 149.9 mm (5.9 in) on 13 March 1908.

Record daily precipitation for each month at Willapa Harbor
Month	Record daily precipitation (mm)	Date
Jan	120.9 mm (4.8 in)	2 January 1903
Feb	134.4 mm (5.3 in)	9 February 1951
Mar	149.9 mm (5.9 in)	13 March 1908
Apr	106.7 mm (4.2 in)	11 April 1899
May	58.2 mm (2.3 in)	16 May 1941
Jun	71.9 mm (2.8 in)	1 June 1968
Jul	47.5 mm (1.9 in)	15 July 1934
Aug	54.4 mm (2.1 in)	16 August 1912
Sep	74.7 mm (2.9 in)	20 September 1959
Oct	142.7 mm (5.6 in)	31 October 1942
Nov	132.3 mm (5.2 in)	30 November 1902
Dec	121.9 mm (4.8 in)	2 December 1943

Period of Record Coverage

1895 to 1979

85 years of record at Willapa Harbor, 1895 to 1979. 14 years have data for under 90 percent of days and are left out of rankings: 1895, 1896, 1904, 1905, 1906, 1907, 1908, 1909 and others.

Days with data per year at Willapa Harbor
Year	Days with data	Share of year	Complete
1895	274	75%	No
1896	270	74%	No
1897	363	99%	Yes
1898	363	99%	Yes
1899	360	99%	Yes
1900	359	98%	Yes
1901	362	99%	Yes
1902	341	93%	Yes
1903	348	95%	Yes
1904	325	89%	No
1905	287	79%	No
1906	199	55%	No
1907	115	32%	No
1908	318	87%	No
1909	209	57%	No
1910	337	92%	Yes
1911	356	98%	Yes
1912	334	91%	Yes
1913	334	92%	Yes
1914	365	100%	Yes
1915	356	98%	Yes
1916	362	99%	Yes
1917	343	94%	Yes
1918	304	83%	No
1919	275	75%	No
1920	366	100%	Yes
1921	365	100%	Yes
1922	365	100%	Yes
1923	364	100%	Yes
1924	366	100%	Yes
1925	364	100%	Yes
1926	321	88%	No
1927	361	99%	Yes
1928	354	97%	Yes
1929	365	100%	Yes
1930	364	100%	Yes
1931	364	100%	Yes
1932	364	99%	Yes
1933	360	99%	Yes
1934	365	100%	Yes
1935	363	99%	Yes
1936	366	100%	Yes
1937	360	99%	Yes
1938	361	99%	Yes
1939	365	100%	Yes
1940	362	99%	Yes
1941	303	83%	No
1942	361	99%	Yes
1943	364	100%	Yes
1944	365	100%	Yes
1945	364	100%	Yes
1946	364	100%	Yes
1947	362	99%	Yes
1948	274	75%	No
1949	365	100%	Yes
1950	361	99%	Yes
1951	364	100%	Yes
1952	364	99%	Yes
1953	342	94%	Yes
1954	362	99%	Yes
1955	363	99%	Yes
1956	365	100%	Yes
1957	365	100%	Yes
1958	365	100%	Yes
1959	365	100%	Yes
1960	363	99%	Yes
1961	356	98%	Yes
1962	363	99%	Yes
1963	363	99%	Yes
1964	365	100%	Yes
1965	232	64%	No
1966	362	99%	Yes
1967	362	99%	Yes
1968	363	99%	Yes
1969	363	99%	Yes
1970	364	100%	Yes
1971	362	99%	Yes
1972	365	100%	Yes
1973	362	99%	Yes
1974	358	98%	Yes
1975	356	98%	Yes
1976	366	100%	Yes
1977	363	99%	Yes
1978	356	98%	Yes
1979	362	99%	Yes

Latest Records

Latest records at Willapa Harbor
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
19 December 1979	Willapa Harbor, US	daily high min (Tie)	9.4 C (48.9 F)	tie	6 years	2 of 100 (Routine)
18 December 1979	Willapa Harbor, US	daily rain	86.1 mm (3.4 in)	26.9 mm (1.1 in)	28 years	31 of 100 (Routine)
18 December 1979	Willapa Harbor, US	daily high min (Tie)	10.0 C (50.0 F)	tie	61 years	6 of 100 (Routine)
15 December 1979	Willapa Harbor, US	daily rain	79.0 mm (3.1 in)	0.3 mm (0.01 in)	78 years	31 of 100 (Routine)
26 September 1979	Willapa Harbor, US	daily high min	15.0 C (59.0 F)	2.2 C (4.0 F)	65 years	34 of 100 (Routine)
8 September 1979	Willapa Harbor, US	daily rain	32.8 mm (1.3 in)	20.4 mm (0.8 in)	32 years	35 of 100 (Notable)
29 August 1979	Willapa Harbor, US	daily high min	15.6 C (60.1 F)	0.6 C (1.1 F)	65 years	29 of 100 (Routine)
19 August 1979	Willapa Harbor, US	daily rain	23.6 mm (0.9 in)	5.8 mm (0.23 in)	10 years	18 of 100 (Routine)
5 August 1979	Willapa Harbor, US	daily high min	16.7 C (62.1 F)	1.1 C (2.0 F)	21 years	18 of 100 (Routine)
3 August 1979	Willapa Harbor, US	daily high min	15.0 C (59.0 F)	0.6 C (1.1 F)	80 years	34 of 100 (Routine)
1 August 1979	Willapa Harbor, US	daily high min	15.0 C (59.0 F)	0.6 C (1.1 F)	78 years	33 of 100 (Routine)
20 July 1979	Willapa Harbor, US	daily high min (Tie)	15.6 C (60.1 F)	tie	76 years	7 of 100 (Routine)
17 July 1979	Willapa Harbor, US	daily high max	36.7 C (98.1 F)	3.9 C (7.0 F)	66 years	37 of 100 (Notable)
17 July 1979	Willapa Harbor, US	daily high min	16.7 C (62.1 F)	1.1 C (2.0 F)	37 years	23 of 100 (Routine)
16 July 1979	Willapa Harbor, US	daily high max	38.9 C (102.0 F)	5.6 C (10.1 F)	66 years	41 of 100 (Notable)
6 July 1979	Willapa Harbor, US	daily low min	3.3 C (37.9 F)	0.6 C (1.1 F)	77 years	33 of 100 (Routine)
5 July 1979	Willapa Harbor, US	daily high min	16.7 C (62.1 F)	2.3 C (4.1 F)	37 years	28 of 100 (Routine)
6 March 1979	Willapa Harbor, US	daily high min	9.4 C (48.9 F)	1.6 C (2.9 F)	73 years	35 of 100 (Notable)
5 March 1979	Willapa Harbor, US	daily high min	8.3 C (46.9 F)	1.1 C (2.0 F)	72 years	32 of 100 (Routine)
4 March 1979	Willapa Harbor, US	daily high min (Tie)	7.8 C (46.0 F)	tie	38 years	4 of 100 (Routine)

Climate Trend

64 complete years, 1897 to 1979

One stripe for each of 64 complete years at Willapa Harbor, 1897 to 1979. Blue stripes are years cooler than the station's own mean of 10.6 C (51.0 F); red stripes are warmer. The coolest year was 1916, at 8.9 C (47.9 F), and the warmest was 1958, at 12.3 C (54.1 F). The strongest colour marks a difference of 1.8 C (3.2 F).

Annual mean temperature at Willapa Harbor as warming stripes, 1897 to 1979
Year	Annual mean temperature	Difference from the station mean
1897	11.0 C	+0.37 C
1898	10.6 C	+0.00 C
1899	10.2 C	-0.39 C
1900	11.5 C	+0.92 C
1901	10.1 C	-0.49 C
1903	10.2 C	-0.36 C
1911	9.5 C	-1.06 C
1914	10.6 C	+0.04 C
1915	10.9 C	+0.29 C
1916	8.9 C	-1.72 C
1920	10.1 C	-0.53 C
1921	9.4 C	-1.21 C
1922	9.1 C	-1.50 C
1923	10.8 C	+0.18 C
1924	10.1 C	-0.51 C
1925	11.0 C	+0.37 C
1928	10.8 C	+0.24 C
1929	9.9 C	-0.64 C
1930	10.1 C	-0.50 C
1931	11.2 C	+0.64 C
1932	10.2 C	-0.36 C
1933	10.1 C	-0.51 C
1934	11.9 C	+1.35 C
1935	10.4 C	-0.21 C
1937	11.0 C	+0.40 C
1938	10.4 C	-0.15 C
1939	11.4 C	+0.83 C
1940	12.2 C	+1.58 C
1942	11.2 C	+0.58 C
1943	10.7 C	+0.07 C
1944	10.9 C	+0.31 C
1945	10.5 C	-0.10 C
1946	10.1 C	-0.46 C
1947	11.1 C	+0.54 C
1949	10.0 C	-0.62 C
1950	9.6 C	-0.99 C
1951	10.2 C	-0.41 C
1952	10.4 C	-0.23 C
1953	11.0 C	+0.38 C
1954	10.1 C	-0.46 C
1955	9.3 C	-1.31 C
1956	10.4 C	-0.14 C
1957	10.9 C	+0.30 C
1958	12.3 C	+1.71 C
1959	10.8 C	+0.25 C
1960	10.7 C	+0.13 C
1961	11.1 C	+0.53 C
1962	10.7 C	+0.09 C
1963	11.3 C	+0.71 C
1964	10.1 C	-0.47 C
1966	11.0 C	+0.44 C
1967	11.3 C	+0.75 C
1968	11.0 C	+0.37 C
1969	10.6 C	+0.05 C
1970	10.7 C	+0.09 C
1971	10.2 C	-0.41 C
1972	10.4 C	-0.18 C
1973	10.5 C	-0.12 C
1974	10.7 C	+0.10 C
1975	10.1 C	-0.45 C
1976	10.6 C	+0.02 C
1977	10.5 C	-0.07 C
1978	11.5 C	+0.89 C
1979	11.4 C	+0.80 C

The fitted trend in annual mean temperature here over 1897 to 1979 is 0.06 C (-0.01 to 0.13) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.11 F (-0.02 to 0.24) per decade. The slope is a straight line fitted to 64 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Willapa Harbor
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.06 C (-0.01 to 0.13) per decade	0.11 F (-0.02 to 0.24) per decade	1897 to 1979	64	Not clearly different from zero
Mean daily maximum	0.04 C (-0.04 to 0.12) per decade	0.1 F (-0.1 to 0.2) per decade	1897 to 1979	64	Not clearly different from zero
Mean daily minimum	0.08 C (0.01 to 0.16) per decade	0.15 F (0.01 to 0.28) per decade	1897 to 1979	64	Rise

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

1895 to 1979

Yearly extremes at Willapa Harbor: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	39.4 C (102.9 F)	1905	35.0 C (95.0 F)	85
Coldest night (TNn)	-15.6 C (3.9 F)	1909	-6.7 C (19.9 F)	85
Wettest day (Rx1day)	149.9 mm (5.9 in)	1908	79.2 mm (3.1 in)	85
Wettest five days (Rx5day)	342.9 mm (13.5 in)	1975	178.5 mm (7.0 in)	85
Longest dry spell (CDD)	56 days	1895	25 days	85

Hottest day (TXx)

The hottest day of the year at Willapa Harbor, 1895 to 1979. The record is 39.4 C (102.9 F) in 1905, marked on the chart; the median year is 35.0 C (95.0 F).

Hottest day (TXx) at Willapa Harbor by year
Year	Hottest day (TXx)
1895	38.9 C (102.0 F)
1896	35.6 C (96.1 F)
1897	35.0 C (95.0 F)
1898	35.0 C (95.0 F)
1899	32.8 C (91.0 F)
1900	33.3 C (91.9 F)
1901	35.6 C (96.1 F)
1902	36.7 C (98.1 F)
1903	34.4 C (93.9 F)
1904	35.6 C (96.1 F)
1905	39.4 C (102.9 F)
1906	38.9 C (102.0 F)
1907	30.6 C (87.1 F)
1908	34.4 C (93.9 F)
1909	35.0 C (95.0 F)
1910	31.7 C (89.1 F)
1911	35.6 C (96.1 F)
1912	33.3 C (91.9 F)
1913	27.2 C (81.0 F)
1914	32.8 C (91.0 F)
1915	33.9 C (93.0 F)
1916	33.9 C (93.0 F)
1917	27.8 C (82.0 F)
1918	34.4 C (93.9 F)
1919	35.0 C (95.0 F)
1920	35.0 C (95.0 F)
1921	31.1 C (88.0 F)
1922	36.1 C (97.0 F)
1923	35.0 C (95.0 F)
1924	33.9 C (93.0 F)
1925	35.0 C (95.0 F)
1926	36.1 C (97.0 F)
1927	37.2 C (99.0 F)
1928	35.6 C (96.1 F)
1929	35.0 C (95.0 F)
1930	32.8 C (91.0 F)
1931	37.8 C (100.0 F)
1932	36.1 C (97.0 F)
1933	35.6 C (96.1 F)
1934	36.1 C (97.0 F)
1935	37.2 C (99.0 F)
1936	32.2 C (90.0 F)
1937	35.6 C (96.1 F)
1938	35.6 C (96.1 F)
1939	35.6 C (96.1 F)
1940	35.0 C (95.0 F)
1941	31.1 C (88.0 F)
1942	38.3 C (100.9 F)
1943	32.2 C (90.0 F)
1944	36.7 C (98.1 F)
1945	32.8 C (91.0 F)
1946	36.7 C (98.1 F)
1947	30.6 C (87.1 F)
1948	32.2 C (90.0 F)
1949	32.2 C (90.0 F)
1950	30.6 C (87.1 F)
1951	33.3 C (91.9 F)
1952	36.1 C (97.0 F)
1953	32.2 C (90.0 F)
1954	28.3 C (82.9 F)
1955	31.1 C (88.0 F)
1956	37.8 C (100.0 F)
1957	31.7 C (89.1 F)
1958	36.7 C (98.1 F)
1959	33.3 C (91.9 F)
1960	33.9 C (93.0 F)
1961	36.1 C (97.0 F)
1962	30.0 C (86.0 F)
1963	33.3 C (91.9 F)
1964	32.2 C (90.0 F)
1965	26.7 C (80.1 F)
1966	31.7 C (89.1 F)
1967	34.4 C (93.9 F)
1968	35.0 C (95.0 F)
1969	35.6 C (96.1 F)
1970	35.6 C (96.1 F)
1971	33.3 C (91.9 F)
1972	37.2 C (99.0 F)
1973	32.2 C (90.0 F)
1974	33.9 C (93.0 F)
1975	34.4 C (93.9 F)
1976	30.6 C (87.1 F)
1977	36.7 C (98.1 F)
1978	35.6 C (96.1 F)
1979	38.9 C (102.0 F)

Coldest night (TNn)

The coldest night of the year at Willapa Harbor, 1895 to 1979. The record is -15.6 C (3.9 F) in 1909, marked on the chart; the median year is -6.7 C (19.9 F).

Coldest night (TNn) at Willapa Harbor by year
Year	Coldest night (TNn)
1895	-5.6 C (21.9 F)
1896	-8.9 C (16.0 F)
1897	-5.6 C (21.9 F)
1898	-5.0 C (23.0 F)
1899	-11.1 C (12.0 F)
1900	-6.7 C (19.9 F)
1901	-6.7 C (19.9 F)
1902	-8.3 C (17.1 F)
1903	-5.6 C (21.9 F)
1904	-3.9 C (25.0 F)
1905	-6.7 C (19.9 F)
1906	-7.8 C (18.0 F)
1907	-1.7 C (28.9 F)
1908	-6.7 C (19.9 F)
1909	-15.6 C (3.9 F)
1910	-11.1 C (12.0 F)
1911	-7.2 C (19.0 F)
1912	-3.9 C (25.0 F)
1913	-7.8 C (18.0 F)
1914	-5.6 C (21.9 F)
1915	-6.7 C (19.9 F)
1916	-10.0 C (14.0 F)
1917	-10.6 C (12.9 F)
1918	-5.6 C (21.9 F)
1919	-14.4 C (6.1 F)
1920	-6.1 C (21.0 F)
1921	-8.3 C (17.1 F)
1922	-11.1 C (12.0 F)
1923	-10.6 C (12.9 F)
1924	-11.7 C (10.9 F)
1925	-2.2 C (28.0 F)
1926	-5.0 C (23.0 F)
1927	-6.7 C (19.9 F)
1928	-2.8 C (27.0 F)
1929	-8.9 C (16.0 F)
1930	-13.3 C (8.1 F)
1931	-4.4 C (24.1 F)
1932	-12.2 C (10.0 F)
1933	-10.6 C (12.9 F)
1934	-2.8 C (27.0 F)
1935	-11.7 C (10.9 F)
1936	-6.7 C (19.9 F)
1937	-9.4 C (15.1 F)
1938	-3.3 C (26.1 F)
1939	-3.3 C (26.1 F)
1940	-4.4 C (24.1 F)
1941	-4.4 C (24.1 F)
1942	-7.8 C (18.0 F)
1943	-11.1 C (12.0 F)
1944	-6.1 C (21.0 F)
1945	-3.9 C (25.0 F)
1946	-5.6 C (21.9 F)
1947	-7.8 C (18.0 F)
1948	-5.6 C (21.9 F)
1949	-12.8 C (9.0 F)
1950	-13.9 C (7.0 F)
1951	-9.4 C (15.1 F)
1952	-5.6 C (21.9 F)
1953	-4.4 C (24.1 F)
1954	-5.0 C (23.0 F)
1955	-11.7 C (10.9 F)
1956	-7.8 C (18.0 F)
1957	-10.6 C (12.9 F)
1958	-5.0 C (23.0 F)
1959	-10.0 C (14.0 F)
1960	-5.6 C (21.9 F)
1961	-5.0 C (23.0 F)
1962	-11.1 C (12.0 F)
1963	-10.0 C (14.0 F)
1964	-10.6 C (12.9 F)
1965	-4.4 C (24.1 F)
1966	-2.8 C (27.0 F)
1967	-5.6 C (21.9 F)
1968	-9.4 C (15.1 F)
1969	-7.8 C (18.0 F)
1970	-3.3 C (26.1 F)
1971	-5.0 C (23.0 F)
1972	-15.6 C (3.9 F)
1973	-8.3 C (17.1 F)
1974	-10.0 C (14.0 F)
1975	-3.9 C (25.0 F)
1976	-6.7 C (19.9 F)
1977	-8.3 C (17.1 F)
1978	-12.2 C (10.0 F)
1979	-9.4 C (15.1 F)

Wettest day (Rx1day)

The wettest day of the year at Willapa Harbor, 1895 to 1979. The record is 149.9 mm (5.9 in) in 1908, marked on the chart; the median year is 79.2 mm (3.1 in).

Wettest day (Rx1day) at Willapa Harbor by year
Year	Wettest day (Rx1day)
1895	61.5 mm (2.4 in)
1896	118.9 mm (4.7 in)
1897	101.6 mm (4.0 in)
1898	64.0 mm (2.5 in)
1899	106.7 mm (4.2 in)
1900	78.7 mm (3.1 in)
1901	88.9 mm (3.5 in)
1902	132.3 mm (5.2 in)
1903	120.9 mm (4.8 in)
1904	90.9 mm (3.6 in)
1905	66.0 mm (2.6 in)
1906	39.4 mm (1.6 in)
1907	45.7 mm (1.8 in)
1908	149.9 mm (5.9 in)
1909	63.5 mm (2.5 in)
1910	99.1 mm (3.9 in)
1911	62.2 mm (2.4 in)
1912	99.1 mm (3.9 in)
1913	80.0 mm (3.1 in)
1914	81.0 mm (3.2 in)
1915	80.0 mm (3.1 in)
1916	108.5 mm (4.3 in)
1917	83.6 mm (3.3 in)
1918	52.1 mm (2.1 in)
1919	56.4 mm (2.2 in)
1920	66.0 mm (2.6 in)
1921	106.7 mm (4.2 in)
1922	81.3 mm (3.2 in)
1923	79.2 mm (3.1 in)
1924	74.9 mm (2.9 in)
1925	67.3 mm (2.6 in)
1926	50.8 mm (2.0 in)
1927	83.1 mm (3.3 in)
1928	42.7 mm (1.7 in)
1929	71.9 mm (2.8 in)
1930	54.1 mm (2.1 in)
1931	78.5 mm (3.1 in)
1932	112.3 mm (4.4 in)
1933	105.2 mm (4.1 in)
1934	86.4 mm (3.4 in)
1935	90.7 mm (3.6 in)
1936	85.9 mm (3.4 in)
1937	99.1 mm (3.9 in)
1938	78.7 mm (3.1 in)
1939	87.4 mm (3.4 in)
1940	57.7 mm (2.3 in)
1941	61.0 mm (2.4 in)
1942	142.7 mm (5.6 in)
1943	121.9 mm (4.8 in)
1944	52.6 mm (2.1 in)
1945	80.0 mm (3.1 in)
1946	64.0 mm (2.5 in)
1947	82.3 mm (3.2 in)
1948	75.2 mm (3.0 in)
1949	89.4 mm (3.5 in)
1950	79.5 mm (3.1 in)
1951	134.4 mm (5.3 in)
1952	54.1 mm (2.1 in)
1953	80.8 mm (3.2 in)
1954	78.7 mm (3.1 in)
1955	104.1 mm (4.1 in)
1956	112.0 mm (4.4 in)
1957	84.8 mm (3.3 in)
1958	92.7 mm (3.6 in)
1959	77.5 mm (3.1 in)
1960	71.6 mm (2.8 in)
1961	79.0 mm (3.1 in)
1962	95.3 mm (3.8 in)
1963	57.9 mm (2.3 in)
1964	68.8 mm (2.7 in)
1965	75.7 mm (3.0 in)
1966	55.1 mm (2.2 in)
1967	78.7 mm (3.1 in)
1968	71.9 mm (2.8 in)
1969	51.3 mm (2.0 in)
1970	64.0 mm (2.5 in)
1971	56.6 mm (2.2 in)
1972	78.7 mm (3.1 in)
1973	51.3 mm (2.0 in)
1974	66.0 mm (2.6 in)
1975	101.1 mm (4.0 in)
1976	102.9 mm (4.1 in)
1977	103.9 mm (4.1 in)
1978	58.2 mm (2.3 in)
1979	86.1 mm (3.4 in)

Wettest five days (Rx5day)

The wettest five days of the year at Willapa Harbor, 1895 to 1979. The record is 342.9 mm (13.5 in) in 1975, marked on the chart; the median year is 178.5 mm (7.0 in).

Wettest five days (Rx5day) at Willapa Harbor by year
Year	Wettest five days (Rx5day)
1895	147.8 mm (5.8 in)
1896	214.7 mm (8.5 in)
1897	198.6 mm (7.8 in)
1898	172.7 mm (6.8 in)
1899	221.3 mm (8.7 in)
1900	177.4 mm (7.0 in)
1901	202.9 mm (8.0 in)
1902	288.3 mm (11.4 in)
1903	341.3 mm (13.4 in)
1904	202.6 mm (8.0 in)
1905	123.4 mm (4.9 in)
1906	100.6 mm (4.0 in)
1907	112.5 mm (4.4 in)
1908	255.6 mm (10.1 in)
1909	139.7 mm (5.5 in)
1910	281.9 mm (11.1 in)
1911	155.5 mm (6.1 in)
1912	177.9 mm (7.0 in)
1913	210.1 mm (8.3 in)
1914	323.1 mm (12.7 in)
1915	186.2 mm (7.3 in)
1916	243.3 mm (9.6 in)
1917	253.5 mm (10.0 in)
1918	176.4 mm (6.9 in)
1919	140.7 mm (5.5 in)
1920	178.5 mm (7.0 in)
1921	243.0 mm (9.6 in)
1922	204.0 mm (8.0 in)
1923	181.7 mm (7.2 in)
1924	174.3 mm (6.9 in)
1925	152.8 mm (6.0 in)
1926	115.6 mm (4.6 in)
1927	160.8 mm (6.3 in)
1928	113.6 mm (4.5 in)
1929	145.8 mm (5.7 in)
1930	136.7 mm (5.4 in)
1931	148.6 mm (5.9 in)
1932	216.9 mm (8.5 in)
1933	308.9 mm (12.2 in)
1934	237.7 mm (9.4 in)
1935	228.7 mm (9.0 in)
1936	161.0 mm (6.3 in)
1937	214.6 mm (8.4 in)
1938	110.3 mm (4.3 in)
1939	162.0 mm (6.4 in)
1940	193.8 mm (7.6 in)
1941	168.6 mm (6.6 in)
1942	212.1 mm (8.4 in)
1943	231.2 mm (9.1 in)
1944	109.7 mm (4.3 in)
1945	149.1 mm (5.9 in)
1946	214.4 mm (8.4 in)
1947	192.6 mm (7.6 in)
1948	170.1 mm (6.7 in)
1949	228.8 mm (9.0 in)
1950	214.4 mm (8.4 in)
1951	290.9 mm (11.5 in)
1952	160.8 mm (6.3 in)
1953	203.8 mm (8.0 in)
1954	235.6 mm (9.3 in)
1955	176.5 mm (6.9 in)
1956	200.7 mm (7.9 in)
1957	133.3 mm (5.2 in)
1958	219.2 mm (8.6 in)
1959	207.8 mm (8.2 in)
1960	176.4 mm (6.9 in)
1961	247.9 mm (9.8 in)
1962	153.7 mm (6.1 in)
1963	167.9 mm (6.6 in)
1964	157.8 mm (6.2 in)
1965	203.0 mm (8.0 in)
1966	176.5 mm (6.9 in)
1967	167.6 mm (6.6 in)
1968	152.1 mm (6.0 in)
1969	127.8 mm (5.0 in)
1970	156.6 mm (6.2 in)
1971	230.1 mm (9.1 in)
1972	183.3 mm (7.2 in)
1973	169.7 mm (6.7 in)
1974	148.5 mm (5.8 in)
1975	342.9 mm (13.5 in)
1976	174.8 mm (6.9 in)
1977	184.5 mm (7.3 in)
1978	114.1 mm (4.5 in)
1979	233.7 mm (9.2 in)

Longest dry spell (CDD)

The longest dry spell of the year at Willapa Harbor, 1895 to 1979. The record is 56 days in 1895, marked on the chart; the median year is 25 days.

Longest dry spell (CDD) at Willapa Harbor by year
Year	Longest dry spell (CDD)
1895	56 days
1896	51 days
1897	20 days
1898	30 days
1899	29 days
1900	25 days
1901	42 days
1902	22 days
1903	29 days
1904	32 days
1905	29 days
1906	33 days
1907	1 day
1908	27 days
1909	26 days
1910	22 days
1911	28 days
1912	14 days
1913	31 days
1914	28 days
1915	32 days
1916	28 days
1917	24 days
1918	42 days
1919	26 days
1920	21 days
1921	43 days
1922	47 days
1923	44 days
1924	25 days
1925	29 days
1926	32 days
1927	22 days
1928	25 days
1929	22 days
1930	10 days
1931	19 days
1932	18 days
1933	26 days
1934	15 days
1935	15 days
1936	20 days
1937	23 days
1938	9 days
1939	24 days
1940	17 days
1941	17 days
1942	22 days
1943	21 days
1944	11 days
1945	32 days
1946	16 days
1947	17 days
1948	10 days
1949	20 days
1950	27 days
1951	27 days
1952	37 days
1953	18 days
1954	18 days
1955	23 days
1956	20 days
1957	21 days
1958	25 days
1959	27 days
1960	29 days
1961	21 days
1962	24 days
1963	23 days
1964	8 days
1965	21 days
1966	24 days
1967	26 days
1968	28 days
1969	34 days
1970	26 days
1971	39 days
1972	34 days
1973	26 days
1974	32 days
1975	16 days
1976	17 days
1977	31 days
1978	16 days
1979	32 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.

Frost Dates and Growing Season

64 years with a frost

Across 64 years with a frost, the median last spring frost at Willapa Harbor falls on 21 April and the median first autumn frost on 3 November, which leaves a median of 196 days between them.

In 1949 to 1979 the median growing season was 194 days. That is 6 days fewer than in 1897 to 1943.

Fitted over all years, the growing season changes by +0.9 days per decade at this station.

Frost dates and growing season at Willapa Harbor
Measure	Median, all years	Earliest period (1897 to 1943)	Recent period (1949 to 1979)	Recent against earliest	Fitted trend
Last spring frost	21 April	15 April	22 April	7 days later	-0.5 days per decade
First autumn frost	3 November	5 November	2 November	3 days earlier	+0.3 days per decade
Growing days	196 days	200 days	194 days	6 days fewer	+0.9 days per decade

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Rainfall Return Levels

60 years, 1897 to 1979

A day with at least 80.3 mm (3.2 in) of rain is expected about once in 2 years. A day with at least 157.2 mm (6.2 in) of rain is expected about once in 100 years.

Rainfall return levels at Willapa Harbor: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	80.3 mm (3.2 in)
5 years	101.5 mm (4.0 in)
10 years	115.3 mm (4.5 in)
25 years	132.5 mm (5.2 in)
50 years	145.0 mm (5.7 in)
100 years	157.2 mm (6.2 in)	Longer than the 60 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 60 years of values from 1897 to 1979.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 149.9 mm (5.9 in) in 1908; 142.7 mm (5.6 in) in 1942; 134.4 mm (5.3 in) in 1951.

Station Changes

No change in the annual mean temperature of this station was found against its neighbours.

Download the Data

Data for Willapa Harbor standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Willapa Harbor 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). Records are computed by this site and are not official.

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