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
Record highRecord low2026 daily maximum2026 daily minimum
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
Year with most
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.
When Willapa Harbor set new all-time records
Date
Kind
Detail
1950-01-14
Record low maximum temperature
Record low maximum temperature -6.7 C (19.9 F)
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
Complete yearUnder 90 percent of days
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.
Cooler than the station meanWarmer than the station mean
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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.