Record envelope, standing records and threshold days for Vashon Island (USC00458802), Washington, United States, with 65 years of record.
Key Facts for Vashon Island
Vashon Island (USC00458802) is a weather station in Washington, United States at 47.45 latitude and -122.50 longitude, 70 m (230 ft) above sea level.
The station reports from 1891 to 1955, 65 years of record.
1,464 records set at Vashon Island still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Vashon Island set a daily record low minimum temperature of -2.8 C (27.0 F) on 27 February 1955.
About the Station
Location: Washington, United States, 47.45 latitude, -122.50 longitude.
Elevation: 70 m (230 ft).
Period of record: 1891 to 1955, 65 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 Vashon Island. 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 Vashon Island, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
18.9 C (66.0 F)
-13.3 C (8.1 F)
n/a
n/a
Feb
20.6 C (69.1 F)
-12.8 C (9.0 F)
n/a
n/a
Mar
25.6 C (78.1 F)
-6.1 C (21.0 F)
n/a
n/a
Apr
29.4 C (84.9 F)
-3.9 C (25.0 F)
n/a
n/a
May
31.1 C (88.0 F)
-1.7 C (28.9 F)
n/a
n/a
Jun
35.0 C (95.0 F)
0.0 C (32.0 F)
n/a
n/a
Jul
35.6 C (96.1 F)
3.3 C (37.9 F)
n/a
n/a
Aug
36.7 C (98.1 F)
4.4 C (39.9 F)
n/a
n/a
Sep
33.9 C (93.0 F)
0.0 C (32.0 F)
n/a
n/a
Oct
28.3 C (82.9 F)
-6.1 C (21.0 F)
n/a
n/a
Nov
25.6 C (78.1 F)
-7.8 C (18.0 F)
n/a
n/a
Dec
17.8 C (64.0 F)
-13.9 C (7.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Vashon Island still stand. 1919 holds the most, with 56.
Standing records at Vashon Island by the year they were set
Year set
Standing records
1891
25
1892
44
1898
23
1899
34
1900
27
1901
25
1902
15
1903
21
1904
17
1905
23
1906
42
1907
15
1908
21
1909
31
1910
19
1911
22
1912
19
1913
12
1915
19
1916
44
1917
52
1918
36
1919
56
1920
26
1921
25
1922
51
1923
34
1924
50
1925
8
1926
38
1927
18
1928
20
1929
13
1931
26
1932
10
1933
19
1934
22
1935
39
1936
30
1937
26
1938
14
1939
16
1940
18
1941
31
1942
33
1943
19
1944
37
1945
19
1946
15
1947
30
1948
5
1949
17
1950
43
1951
16
1952
20
1953
15
1954
14
1955
5
All-Time Record Progression
2 new records
2 all-time records were set at Vashon Island between 18 January 1935 and 19 January 1935. Each dot is a new record.
When Vashon Island set new all-time records
Date
Kind
Detail
1935-01-18
Record low maximum temperature
Record low maximum temperature -6.7 C (19.9 F)
1935-01-19
Record low maximum temperature
Record low maximum temperature -7.8 C (18.0 F)
Wettest Day of Each Month
Nov: 109.0 mm (4.3 in)
The wettest day on record for each calendar month at Vashon Island. The most was 109.0 mm (4.3 in) on 14 November 1906.
Record daily precipitation for each month at Vashon Island
Month
Record daily precipitation (mm)
Date
Jan
82.3 mm (3.2 in)
21 January 1935
Feb
99.1 mm (3.9 in)
9 February 1951
Mar
66.8 mm (2.6 in)
3 March 1950
Apr
64.8 mm (2.6 in)
11 April 1899
May
33.8 mm (1.3 in)
16 May 1941
Jun
30.5 mm (1.2 in)
25 June 1931
Jul
30.5 mm (1.2 in)
14 July 1939
Aug
26.9 mm (1.1 in)
31 August 1936
Sep
51.3 mm (2.0 in)
30 September 1953
Oct
55.6 mm (2.2 in)
3 October 1927
Nov
109.0 mm (4.3 in)
14 November 1906
Dec
81.8 mm (3.2 in)
27 December 1937
Period of Record Coverage
1891 to 1955
Complete yearUnder 90 percent of days
58 years of record at Vashon Island, 1891 to 1955. 16 years have data for under 90 percent of days and are left out of rankings: 1891, 1892, 1899, 1915, 1925, 1929, 1931, 1932 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 37 complete years at Vashon Island, 1898 to 1954. Blue stripes are years cooler than the station's own mean of 10.3 C (50.6 F); red stripes are warmer. The coolest year was 1909, at 9.4 C (48.9 F), and the warmest was 1926, at 11.9 C (53.3 F). The strongest colour marks a difference of 1.6 C (2.9 F).
Annual mean temperature at Vashon Island as warming stripes, 1898 to 1954
Year
Annual mean temperature
Difference from the station mean
1898
10.4 C
+0.10 C
1900
10.7 C
+0.33 C
1902
10.4 C
+0.06 C
1903
10.1 C
-0.23 C
1905
10.7 C
+0.39 C
1906
11.0 C
+0.66 C
1907
10.4 C
+0.04 C
1908
10.2 C
-0.12 C
1909
9.4 C
-0.94 C
1910
9.8 C
-0.59 C
1911
9.4 C
-0.93 C
1912
10.0 C
-0.39 C
1913
9.6 C
-0.70 C
1916
9.5 C
-0.87 C
1917
10.8 C
+0.43 C
1919
9.7 C
-0.62 C
1920
10.0 C
-0.32 C
1921
10.0 C
-0.30 C
1922
9.5 C
-0.87 C
1923
11.0 C
+0.63 C
1924
10.3 C
-0.02 C
1926
11.9 C
+1.51 C
1927
10.3 C
-0.04 C
1928
10.7 C
+0.36 C
1935
9.4 C
-0.90 C
1937
10.0 C
-0.37 C
1938
10.5 C
+0.17 C
1941
11.7 C
+1.36 C
1942
11.1 C
+0.78 C
1944
11.1 C
+0.74 C
1946
10.0 C
-0.34 C
1949
10.4 C
+0.01 C
1950
10.0 C
-0.33 C
1951
10.5 C
+0.12 C
1952
10.7 C
+0.40 C
1953
11.1 C
+0.77 C
1954
10.2 C
-0.16 C
The fitted trend in annual mean temperature here over 1898 to 1954 is 0.08 C (-0.03 to 0.20) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.2 F (-0.1 to 0.4) per decade. The slope is a straight line fitted to 37 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Vashon Island
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.08 C (-0.03 to 0.20) per decade
0.2 F (-0.1 to 0.4) per decade
1898 to 1954
37
Not clearly different from zero
Mean daily maximum
0.2 C (0.1 to 0.4) per decade
0.4 F (0.1 to 0.6) per decade
1898 to 1954
37
Rise
Mean daily minimum
-0.04 C (-0.17 to 0.09) per decade
-0.1 F (-0.3 to 0.2) per decade
1898 to 1954
37
Not clearly different from zero
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
1891 to 1955
Yearly extremes at Vashon Island: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
36.7 C (98.1 F)
1892
31.1 C (88.0 F)
58
Coldest night (TNn)
-13.9 C (7.0 F)
1919
-7.5 C (18.5 F)
58
Wettest day (Rx1day)
109.0 mm (4.3 in)
1906
49.8 mm (2.0 in)
59
Wettest five days (Rx5day)
259.3 mm (10.2 in)
1933
100.9 mm (4.0 in)
59
Longest dry spell (CDD)
78 days
1922
34 days
59
Hottest day (TXx)
The hottest day of the year at Vashon Island, 1891 to 1955. The record is 36.7 C (98.1 F) in 1892, marked on the chart; the median year is 31.1 C (88.0 F).
Hottest day (TXx) at Vashon Island by year
Year
Hottest day (TXx)
1891
32.8 C (91.0 F)
1892
36.7 C (98.1 F)
1898
32.2 C (90.0 F)
1899
31.7 C (89.1 F)
1900
27.8 C (82.0 F)
1901
28.3 C (82.9 F)
1902
30.6 C (87.1 F)
1903
30.0 C (86.0 F)
1904
32.2 C (90.0 F)
1905
30.0 C (86.0 F)
1906
30.0 C (86.0 F)
1907
31.7 C (89.1 F)
1908
29.4 C (84.9 F)
1909
27.8 C (82.0 F)
1910
28.9 C (84.0 F)
1911
30.0 C (86.0 F)
1912
27.8 C (82.0 F)
1913
28.3 C (82.9 F)
1914
n/a
1915
33.9 C (93.0 F)
1916
33.3 C (91.9 F)
1917
31.1 C (88.0 F)
1918
31.7 C (89.1 F)
1919
32.2 C (90.0 F)
1920
33.9 C (93.0 F)
1921
28.9 C (84.0 F)
1922
32.2 C (90.0 F)
1923
32.2 C (90.0 F)
1924
34.4 C (93.9 F)
1925
30.6 C (87.1 F)
1926
32.8 C (91.0 F)
1927
32.2 C (90.0 F)
1928
32.2 C (90.0 F)
1929
28.9 C (84.0 F)
1931
35.0 C (95.0 F)
1932
31.1 C (88.0 F)
1933
31.7 C (89.1 F)
1934
30.0 C (86.0 F)
1935
31.1 C (88.0 F)
1936
32.2 C (90.0 F)
1937
31.1 C (88.0 F)
1938
31.1 C (88.0 F)
1939
33.3 C (91.9 F)
1940
32.2 C (90.0 F)
1941
35.0 C (95.0 F)
1942
35.6 C (96.1 F)
1943
31.1 C (88.0 F)
1944
32.8 C (91.0 F)
1945
31.1 C (88.0 F)
1946
28.9 C (84.0 F)
1947
27.8 C (82.0 F)
1948
29.4 C (84.9 F)
1949
32.2 C (90.0 F)
1950
31.1 C (88.0 F)
1951
34.4 C (93.9 F)
1952
35.0 C (95.0 F)
1953
31.1 C (88.0 F)
1954
28.3 C (82.9 F)
1955
11.7 C (53.1 F)
Coldest night (TNn)
The coldest night of the year at Vashon Island, 1891 to 1955. The record is -13.9 C (7.0 F) in 1919, marked on the chart; the median year is -7.5 C (18.5 F).
Coldest night (TNn) at Vashon Island by year
Year
Coldest night (TNn)
1891
3.9 C (39.0 F)
1892
-3.3 C (26.1 F)
1898
-3.3 C (26.1 F)
1899
-12.8 C (9.0 F)
1900
-7.8 C (18.0 F)
1901
-3.9 C (25.0 F)
1902
-10.0 C (14.0 F)
1903
-5.0 C (23.0 F)
1904
-3.9 C (25.0 F)
1905
-7.8 C (18.0 F)
1906
-6.1 C (21.0 F)
1907
-10.6 C (12.9 F)
1908
-3.9 C (25.0 F)
1909
-10.6 C (12.9 F)
1910
-5.0 C (23.0 F)
1911
-7.8 C (18.0 F)
1912
-4.4 C (24.1 F)
1913
-6.1 C (21.0 F)
1914
n/a
1915
-5.6 C (21.9 F)
1916
-11.1 C (12.0 F)
1917
-11.1 C (12.0 F)
1918
-7.2 C (19.0 F)
1919
-13.9 C (7.0 F)
1920
-6.7 C (19.9 F)
1921
-5.6 C (21.9 F)
1922
-9.4 C (15.1 F)
1923
-10.0 C (14.0 F)
1924
-12.8 C (9.0 F)
1925
-2.2 C (28.0 F)
1926
-8.9 C (16.0 F)
1927
-10.0 C (14.0 F)
1928
-7.2 C (19.0 F)
1929
-11.1 C (12.0 F)
1931
-3.9 C (25.0 F)
1932
-10.6 C (12.9 F)
1933
-11.7 C (10.9 F)
1934
-6.7 C (19.9 F)
1935
-11.7 C (10.9 F)
1936
-7.8 C (18.0 F)
1937
-10.6 C (12.9 F)
1938
-6.1 C (21.0 F)
1939
-4.4 C (24.1 F)
1940
-3.9 C (25.0 F)
1941
-10.6 C (12.9 F)
1942
-6.1 C (21.0 F)
1943
-13.3 C (8.1 F)
1944
-6.7 C (19.9 F)
1945
-3.3 C (26.1 F)
1946
-6.1 C (21.0 F)
1947
-7.8 C (18.0 F)
1948
-6.1 C (21.0 F)
1949
-8.9 C (16.0 F)
1950
-12.8 C (9.0 F)
1951
-8.3 C (17.1 F)
1952
-8.3 C (17.1 F)
1953
-2.2 C (28.0 F)
1954
-8.3 C (17.1 F)
1955
-3.3 C (26.1 F)
Wettest day (Rx1day)
The wettest day of the year at Vashon Island, 1891 to 1955. The record is 109.0 mm (4.3 in) in 1906, marked on the chart; the median year is 49.8 mm (2.0 in).
Wettest day (Rx1day) at Vashon Island by year
Year
Wettest day (Rx1day)
1891
3.0 mm (0.12 in)
1892
5.1 mm (0.20 in)
1898
33.5 mm (1.3 in)
1899
64.8 mm (2.6 in)
1900
55.6 mm (2.2 in)
1901
49.8 mm (2.0 in)
1902
58.2 mm (2.3 in)
1903
42.2 mm (1.7 in)
1904
71.1 mm (2.8 in)
1905
46.5 mm (1.8 in)
1906
109.0 mm (4.3 in)
1907
47.2 mm (1.9 in)
1908
44.7 mm (1.8 in)
1909
51.1 mm (2.0 in)
1910
60.7 mm (2.4 in)
1911
46.5 mm (1.8 in)
1912
35.8 mm (1.4 in)
1913
31.5 mm (1.2 in)
1914
51.8 mm (2.0 in)
1915
45.7 mm (1.8 in)
1916
53.6 mm (2.1 in)
1917
50.8 mm (2.0 in)
1918
43.4 mm (1.7 in)
1919
66.0 mm (2.6 in)
1920
48.0 mm (1.9 in)
1921
66.3 mm (2.6 in)
1922
47.5 mm (1.9 in)
1923
43.2 mm (1.7 in)
1924
50.8 mm (2.0 in)
1925
25.4 mm (1.0 in)
1926
48.8 mm (1.9 in)
1927
55.6 mm (2.2 in)
1928
41.9 mm (1.6 in)
1929
28.7 mm (1.1 in)
1931
50.8 mm (2.0 in)
1932
62.2 mm (2.4 in)
1933
79.2 mm (3.1 in)
1934
54.4 mm (2.1 in)
1935
82.3 mm (3.2 in)
1936
80.8 mm (3.2 in)
1937
81.8 mm (3.2 in)
1938
43.9 mm (1.7 in)
1939
47.5 mm (1.9 in)
1940
39.4 mm (1.6 in)
1941
50.8 mm (2.0 in)
1942
54.9 mm (2.2 in)
1943
48.8 mm (1.9 in)
1944
30.7 mm (1.2 in)
1945
56.4 mm (2.2 in)
1946
50.8 mm (2.0 in)
1947
53.6 mm (2.1 in)
1948
37.1 mm (1.5 in)
1949
43.2 mm (1.7 in)
1950
66.8 mm (2.6 in)
1951
99.1 mm (3.9 in)
1952
19.6 mm (0.8 in)
1953
51.3 mm (2.0 in)
1954
40.6 mm (1.6 in)
1955
40.6 mm (1.6 in)
Wettest five days (Rx5day)
The wettest five days of the year at Vashon Island, 1891 to 1955. The record is 259.3 mm (10.2 in) in 1933, marked on the chart; the median year is 100.9 mm (4.0 in).
Wettest five days (Rx5day) at Vashon Island by year
Year
Wettest five days (Rx5day)
1891
8.1 mm (0.32 in)
1892
9.5 mm (0.37 in)
1898
98.3 mm (3.9 in)
1899
107.2 mm (4.2 in)
1900
91.9 mm (3.6 in)
1901
106.9 mm (4.2 in)
1902
104.2 mm (4.1 in)
1903
100.4 mm (4.0 in)
1904
156.9 mm (6.2 in)
1905
100.5 mm (4.0 in)
1906
172.8 mm (6.8 in)
1907
98.0 mm (3.9 in)
1908
89.6 mm (3.5 in)
1909
101.1 mm (4.0 in)
1910
161.1 mm (6.3 in)
1911
69.7 mm (2.7 in)
1912
90.9 mm (3.6 in)
1913
89.4 mm (3.5 in)
1914
170.6 mm (6.7 in)
1915
100.0 mm (3.9 in)
1916
121.7 mm (4.8 in)
1917
149.4 mm (5.9 in)
1918
122.4 mm (4.8 in)
1919
131.6 mm (5.2 in)
1920
98.1 mm (3.9 in)
1921
158.2 mm (6.2 in)
1922
82.0 mm (3.2 in)
1923
88.2 mm (3.5 in)
1924
100.9 mm (4.0 in)
1925
83.8 mm (3.3 in)
1926
76.7 mm (3.0 in)
1927
82.0 mm (3.2 in)
1928
88.0 mm (3.5 in)
1929
73.6 mm (2.9 in)
1931
120.0 mm (4.7 in)
1932
145.0 mm (5.7 in)
1933
259.3 mm (10.2 in)
1934
151.0 mm (5.9 in)
1935
218.2 mm (8.6 in)
1936
132.8 mm (5.2 in)
1937
203.9 mm (8.0 in)
1938
81.0 mm (3.2 in)
1939
150.6 mm (5.9 in)
1940
75.2 mm (3.0 in)
1941
141.3 mm (5.6 in)
1942
101.8 mm (4.0 in)
1943
132.1 mm (5.2 in)
1944
77.7 mm (3.1 in)
1945
105.5 mm (4.2 in)
1946
89.2 mm (3.5 in)
1947
141.6 mm (5.6 in)
1948
79.8 mm (3.1 in)
1949
86.2 mm (3.4 in)
1950
98.5 mm (3.9 in)
1951
175.0 mm (6.9 in)
1952
54.9 mm (2.2 in)
1953
127.6 mm (5.0 in)
1954
109.4 mm (4.3 in)
1955
73.1 mm (2.9 in)
Longest dry spell (CDD)
The longest dry spell of the year at Vashon Island, 1891 to 1955. The record is 78 days in 1922, marked on the chart; the median year is 34 days.
Longest dry spell (CDD) at Vashon Island by year
Year
Longest dry spell (CDD)
1891
35 days
1892
36 days
1898
30 days
1899
22 days
1900
21 days
1901
25 days
1902
30 days
1903
36 days
1904
40 days
1905
31 days
1906
44 days
1907
27 days
1908
18 days
1909
44 days
1910
46 days
1911
46 days
1912
21 days
1913
38 days
1914
74 days
1915
45 days
1916
46 days
1917
70 days
1918
41 days
1919
34 days
1920
45 days
1921
43 days
1922
78 days
1923
43 days
1924
29 days
1925
24 days
1926
63 days
1927
46 days
1928
60 days
1929
31 days
1931
46 days
1932
20 days
1933
30 days
1934
28 days
1935
22 days
1936
44 days
1937
24 days
1938
2 days
1939
24 days
1940
34 days
1941
25 days
1942
40 days
1943
27 days
1944
50 days
1945
37 days
1946
43 days
1947
22 days
1948
14 days
1949
20 days
1950
30 days
1951
51 days
1952
40 days
1953
15 days
1954
24 days
1955
7 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
37 years with a frost
Across 37 years with a frost, the median last spring frost at Vashon Island falls on 7 April and the median first autumn frost on 13 November, which leaves a median of 213 days between them.
Fitted over all years, the growing season changes by -2.7 days per decade at this station.
Frost dates and growing season at Vashon Island
Measure
Median, all years
Earliest period
Recent period (1908 to 1954)
Recent against earliest
Fitted trend
Last spring frost
7 April
n/a
8 April
n/a
+1.4 days per decade
First autumn frost
13 November
n/a
13 November
n/a
-1.3 days per decade
Growing days
213 days
n/a
211 days
n/a
-2.7 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
42 years, 1898 to 1954
A day with at least 49.3 mm (1.9 in) of rain is expected about once in 2 years. A day with at least 104.2 mm (4.1 in) of rain is expected about once in 100 years.
Rainfall return levels at Vashon Island: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
49.3 mm (1.9 in)
5 years
62.6 mm (2.5 in)
10 years
72.0 mm (2.8 in)
25 years
84.5 mm (3.3 in)
50 years
94.2 mm (3.7 in)
Longer than the 42 years of record
100 years
104.2 mm (4.1 in)
Longer than the 42 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, 42 years of values from 1898 to 1954.
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: 109.0 mm (4.3 in) in 1906; 99.1 mm (3.9 in) in 1951; 80.8 mm (3.2 in) in 1936.
Download the Data
Data for Vashon Island standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Vashon Island 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 2026-10-12 (12 October 2026). Records are computed by this site and are not official.