Seattle UNIV of Washin Weather Records (USC00457478)
Record envelope, standing records and threshold days for Seattle UNIV of Washin (USC00457478), Washington, United States, with 75 years of record.
Key Facts for Seattle UNIV of Washin
- Seattle UNIV of Washin (USC00457478) is a weather station in Washington, United States at 47.65 latitude and -122.28 longitude, 29 m (95 ft) above sea level.
- The station reports from 1909 to 1983, 75 years of record.
- 1,464 records set at Seattle UNIV of Washin still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Seattle UNIV of Washin set a daily record low minimum temperature of 6.7 C (44.1 F) on 8 July 1983.
About the Station
- Location: Washington, United States, 47.65 latitude, -122.28 longitude.
- Elevation: 29 m (95 ft).
- Period of record: 1909 to 1983, 75 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
0 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 20.0 C (68.0 F) | -14.4 C (6.1 F) | n/a | n/a |
| Feb | 21.7 C (71.1 F) | -13.3 C (8.1 F) | n/a | n/a |
| Mar | 25.0 C (77.0 F) | -8.3 C (17.1 F) | n/a | n/a |
| Apr | 31.1 C (88.0 F) | -6.1 C (21.0 F) | n/a | n/a |
| May | 35.6 C (96.1 F) | -1.1 C (30.0 F) | n/a | n/a |
| Jun | 37.2 C (99.0 F) | 2.2 C (36.0 F) | n/a | n/a |
| Jul | 36.7 C (98.1 F) | 5.0 C (41.0 F) | n/a | n/a |
| Aug | 39.4 C (102.9 F) | 5.0 C (41.0 F) | n/a | n/a |
| Sep | 36.7 C (98.1 F) | 2.2 C (36.0 F) | n/a | n/a |
| Oct | 31.1 C (88.0 F) | -2.2 C (28.0 F) | n/a | n/a |
| Nov | 23.3 C (73.9 F) | -12.2 C (10.0 F) | n/a | n/a |
| Dec | 18.3 C (64.9 F) | -15.0 C (5.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1909 | 37 |
| 1910 | 32 |
| 1911 | 30 |
| 1912 | 28 |
| 1913 | 22 |
| 1914 | 21 |
| 1915 | 10 |
| 1916 | 33 |
| 1917 | 34 |
| 1918 | 19 |
| 1919 | 39 |
| 1920 | 191 |
| 1921 | 17 |
| 1922 | 10 |
| 1923 | 24 |
| 1924 | 27 |
| 1925 | 17 |
| 1926 | 20 |
| 1927 | 12 |
| 1928 | 10 |
| 1929 | 13 |
| 1930 | 13 |
| 1931 | 14 |
| 1932 | 20 |
| 1933 | 15 |
| 1934 | 30 |
| 1935 | 32 |
| 1936 | 19 |
| 1937 | 12 |
| 1938 | 9 |
| 1939 | 12 |
| 1940 | 16 |
| 1941 | 31 |
| 1942 | 28 |
| 1943 | 15 |
| 1944 | 16 |
| 1945 | 11 |
| 1946 | 5 |
| 1947 | 11 |
| 1948 | 6 |
| 1949 | 17 |
| 1950 | 28 |
| 1951 | 15 |
| 1952 | 19 |
| 1953 | 13 |
| 1954 | 5 |
| 1955 | 30 |
| 1956 | 12 |
| 1957 | 10 |
| 1958 | 19 |
| 1959 | 4 |
| 1960 | 9 |
| 1961 | 5 |
| 1962 | 7 |
| 1963 | 16 |
| 1964 | 5 |
| 1965 | 13 |
| 1966 | 12 |
| 1967 | 13 |
| 1968 | 19 |
| 1969 | 14 |
| 1970 | 18 |
| 1971 | 19 |
| 1972 | 23 |
| 1973 | 12 |
| 1974 | 12 |
| 1975 | 10 |
| 1976 | 11 |
| 1977 | 22 |
| 1978 | 17 |
| 1979 | 15 |
| 1980 | 21 |
| 1981 | 16 |
| 1982 | 13 |
| 1983 | 9 |
All-Time Record Progression
4 new records| Date | Kind | Detail |
|---|---|---|
| 1941-07-16 | Record high minimum temperature | Record high minimum temperature 20.6 C (69.1 F) |
| 1941-07-17 | Record high minimum temperature | Record high minimum temperature 22.2 C (72.0 F) |
| 1963-08-18 | Record daily precipitation | Record daily precipitation 101.6 mm (4.0 in) |
| 1981-08-09 | Record high maximum temperature | Record high maximum temperature 39.4 C (102.9 F) |
Wettest Day of Each Month
Aug: 101.6 mm (4.0 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 54.4 mm (2.1 in) | 27 January 1943 |
| Feb | 48.8 mm (1.9 in) | 9 February 1951 |
| Mar | 88.9 mm (3.5 in) | 31 March 1922 |
| Apr | 45.7 mm (1.8 in) | 2 April 1915 |
| May | 35.6 mm (1.4 in) | 28 May 1915 |
| Jun | 32.0 mm (1.3 in) | 27 June 1959 |
| Jul | 35.6 mm (1.4 in) | 12 July 1920 |
| Aug | 101.6 mm (4.0 in) | 18 August 1963 |
| Sep | 46.0 mm (1.8 in) | 30 September 1953 |
| Oct | 81.3 mm (3.2 in) | 6 October 1981 |
| Nov | 62.5 mm (2.5 in) | 20 November 1959 |
| Dec | 70.4 mm (2.8 in) | 11 December 1921 |
Period of Record Coverage
1909 to 1983| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1909 | 358 | 98% | Yes |
| 1910 | 356 | 98% | Yes |
| 1911 | 348 | 95% | Yes |
| 1912 | 362 | 99% | Yes |
| 1913 | 359 | 98% | Yes |
| 1914 | 289 | 79% | No |
| 1915 | 360 | 99% | Yes |
| 1916 | 366 | 100% | Yes |
| 1917 | 365 | 100% | Yes |
| 1918 | 334 | 92% | Yes |
| 1919 | 267 | 73% | No |
| 1920 | 328 | 90% | No |
| 1921 | 356 | 98% | Yes |
| 1922 | 364 | 100% | Yes |
| 1923 | 357 | 98% | Yes |
| 1924 | 331 | 90% | Yes |
| 1925 | 364 | 100% | Yes |
| 1926 | 364 | 100% | Yes |
| 1927 | 365 | 100% | Yes |
| 1928 | 365 | 100% | Yes |
| 1929 | 356 | 98% | Yes |
| 1930 | 361 | 99% | Yes |
| 1931 | 296 | 81% | No |
| 1932 | 347 | 95% | Yes |
| 1933 | 360 | 99% | Yes |
| 1934 | 363 | 99% | Yes |
| 1935 | 365 | 100% | Yes |
| 1936 | 365 | 100% | Yes |
| 1937 | 365 | 100% | Yes |
| 1938 | 363 | 99% | Yes |
| 1939 | 361 | 99% | Yes |
| 1940 | 363 | 99% | Yes |
| 1941 | 362 | 99% | Yes |
| 1942 | 360 | 99% | Yes |
| 1943 | 354 | 97% | Yes |
| 1944 | 362 | 99% | Yes |
| 1945 | 363 | 99% | Yes |
| 1946 | 336 | 92% | Yes |
| 1947 | 259 | 71% | No |
| 1948 | 359 | 98% | Yes |
| 1949 | 363 | 99% | Yes |
| 1950 | 363 | 99% | Yes |
| 1951 | 365 | 100% | Yes |
| 1952 | 358 | 98% | Yes |
| 1953 | 364 | 100% | Yes |
| 1954 | 356 | 98% | Yes |
| 1955 | 357 | 98% | Yes |
| 1956 | 359 | 98% | Yes |
| 1957 | 277 | 76% | No |
| 1958 | 277 | 76% | No |
| 1959 | 345 | 95% | Yes |
| 1960 | 327 | 89% | No |
| 1961 | 238 | 65% | No |
| 1962 | 317 | 87% | No |
| 1963 | 340 | 93% | Yes |
| 1964 | 231 | 63% | No |
| 1965 | 365 | 100% | Yes |
| 1966 | 363 | 99% | Yes |
| 1967 | 365 | 100% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 365 | 100% | Yes |
| 1970 | 363 | 99% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 365 | 100% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 364 | 100% | Yes |
| 1978 | 354 | 97% | Yes |
| 1979 | 317 | 87% | No |
| 1980 | 362 | 99% | Yes |
| 1981 | 362 | 99% | Yes |
| 1982 | 355 | 97% | Yes |
| 1983 | 208 | 57% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 8 July 1983 | Seattle UNIV of Washin, US | daily low min | 6.7 C (44.1 F) | 0.5 C (0.9 F) | 10 years | 12 of 100 (Routine) |
| 30 May 1983 | Seattle UNIV of Washin, US | daily high min | 15.0 C (59.0 F) | 0.6 C (1.1 F) | 73 years | 31 of 100 (Routine) |
| 29 May 1983 | Seattle UNIV of Washin, US | monthly high min | 17.2 C (63.0 F) | 1.1 C (2.0 F) | 11 years | 24 of 100 (Routine) |
| 29 May 1983 | Seattle UNIV of Washin, US | monthly high max | 35.6 C (96.1 F) | 1.2 C (2.2 F) | 0 years | 19 of 100 (Routine) |
| 28 May 1983 | Seattle UNIV of Washin, US | monthly high max | 34.4 C (93.9 F) | 0.5 C (0.9 F) | 20 years | 24 of 100 (Routine) |
| 25 May 1983 | Seattle UNIV of Washin, US | daily high max | 31.1 C (88.0 F) | 1.1 C (2.0 F) | 36 years | 19 of 100 (Routine) |
| 24 May 1983 | Seattle UNIV of Washin, US | daily high max | 31.7 C (89.1 F) | 2.8 C (5.0 F) | 36 years | 23 of 100 (Routine) |
| 15 May 1983 | Seattle UNIV of Washin, US | daily rain | 12.7 mm (0.5 in) | 5.6 mm (0.22 in) | 38 years | 20 of 100 (Routine) |
| 20 April 1983 | Seattle UNIV of Washin, US | daily high min (Tie) | 10.6 C (51.1 F) | tie | 36 years | 4 of 100 (Routine) |
| 9 March 1983 | Seattle UNIV of Washin, US | daily high min | 9.4 C (48.9 F) | 0.5 C (0.9 F) | 66 years | 28 of 100 (Routine) |
| 23 February 1983 | Seattle UNIV of Washin, US | daily high min | 11.1 C (52.0 F) | 1.7 C (3.1 F) | 24 years | 19 of 100 (Routine) |
| 7 January 1983 | Seattle UNIV of Washin, US | daily high max (Tie) | 12.8 C (55.0 F) | tie | 37 years | 4 of 100 (Routine) |
| 5 January 1983 | Seattle UNIV of Washin, US | daily rain | 50.8 mm (2.0 in) | 21.1 mm (0.8 in) | 28 years | 41 of 100 (Notable) |
| 3 December 1982 | Seattle UNIV of Washin, US | daily rain | 50.8 mm (2.0 in) | 22.6 mm (0.9 in) | 64 years | 52 of 100 (Notable) |
| 25 November 1982 | Seattle UNIV of Washin, US | daily low min | -2.2 C (28.0 F) | 1.1 C (2.0 F) | 63 years | 28 of 100 (Routine) |
| 17 November 1982 | Seattle UNIV of Washin, US | daily rain | 33.3 mm (1.3 in) | 18.1 mm (0.7 in) | 0 years | 29 of 100 (Routine) |
| 22 October 1982 | Seattle UNIV of Washin, US | daily rain | 24.9 mm (1.0 in) | 3.8 mm (0.15 in) | 51 years | 20 of 100 (Routine) |
| 19 September 1982 | Seattle UNIV of Washin, US | daily high max (Tie) | 27.2 C (81.0 F) | tie | 29 years | 3 of 100 (Routine) |
| 18 September 1982 | Seattle UNIV of Washin, US | daily high max (Tie) | 28.9 C (84.0 F) | tie | 29 years | 3 of 100 (Routine) |
| 7 September 1982 | Seattle UNIV of Washin, US | daily high min | 16.1 C (61.0 F) | 1.1 C (2.0 F) | 13 years | 15 of 100 (Routine) |
Climate Trend
60 complete years, 1909 to 1982| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1909 | 9.5 C | -1.77 C |
| 1910 | 9.8 C | -1.51 C |
| 1912 | 10.7 C | -0.56 C |
| 1913 | 10.1 C | -1.14 C |
| 1915 | 11.4 C | +0.14 C |
| 1916 | 9.4 C | -1.84 C |
| 1917 | 10.2 C | -1.04 C |
| 1921 | 10.8 C | -0.51 C |
| 1922 | 10.5 C | -0.81 C |
| 1923 | 11.3 C | +0.02 C |
| 1924 | 11.1 C | -0.14 C |
| 1925 | 11.6 C | +0.34 C |
| 1926 | 12.0 C | +0.73 C |
| 1927 | 10.7 C | -0.60 C |
| 1928 | 11.1 C | -0.19 C |
| 1929 | 10.2 C | -1.08 C |
| 1930 | 10.4 C | -0.86 C |
| 1932 | 11.4 C | +0.07 C |
| 1933 | 10.9 C | -0.40 C |
| 1934 | 12.8 C | +1.51 C |
| 1935 | 11.2 C | -0.06 C |
| 1936 | 11.7 C | +0.42 C |
| 1937 | 11.4 C | +0.09 C |
| 1938 | 11.9 C | +0.65 C |
| 1939 | 11.9 C | +0.62 C |
| 1940 | 12.3 C | +1.06 C |
| 1941 | 12.4 C | +1.12 C |
| 1942 | 11.9 C | +0.59 C |
| 1943 | 11.3 C | +0.03 C |
| 1944 | 11.6 C | +0.30 C |
| 1945 | 11.2 C | -0.12 C |
| 1948 | 10.8 C | -0.49 C |
| 1949 | 11.0 C | -0.24 C |
| 1950 | 10.5 C | -0.75 C |
| 1951 | 11.3 C | +0.06 C |
| 1952 | 11.3 C | +0.01 C |
| 1953 | 12.0 C | +0.68 C |
| 1954 | 11.1 C | -0.14 C |
| 1955 | 10.2 C | -1.10 C |
| 1956 | 11.4 C | +0.12 C |
| 1959 | 11.3 C | +0.06 C |
| 1962 | 11.4 C | +0.09 C |
| 1963 | 11.6 C | +0.27 C |
| 1965 | 11.8 C | +0.47 C |
| 1966 | 11.8 C | +0.51 C |
| 1967 | 12.2 C | +0.89 C |
| 1968 | 11.5 C | +0.24 C |
| 1969 | 11.4 C | +0.08 C |
| 1970 | 11.4 C | +0.08 C |
| 1971 | 11.0 C | -0.33 C |
| 1972 | 11.2 C | -0.11 C |
| 1973 | 11.5 C | +0.25 C |
| 1974 | 11.6 C | +0.36 C |
| 1975 | 11.1 C | -0.20 C |
| 1976 | 11.5 C | +0.24 C |
| 1977 | 11.7 C | +0.43 C |
| 1978 | 12.2 C | +0.87 C |
| 1980 | 12.2 C | +0.96 C |
| 1981 | 12.5 C | +1.19 C |
| 1982 | 11.7 C | +0.44 C |
The annual mean temperature here has risen by 0.2 C (0.1 to 0.2) per decade over 1909 to 1982. In Fahrenheit: 0.3 F (0.2 to 0.4) per decade. The slope is a straight line fitted to 60 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.2 C (0.1 to 0.2) per decade | 0.3 F (0.2 to 0.4) per decade | 1909 to 1982 | 60 | Rise |
| Mean daily maximum | 0.3 C (0.1 to 0.4) per decade | 0.5 F (0.3 to 0.6) per decade | 1909 to 1982 | 60 | Rise |
| Mean daily minimum | 0.09 C (0.01 to 0.16) per decade | 0.15 F (0.02 to 0.28) per decade | 1909 to 1982 | 60 | 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
1909 to 1983| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 39.4 C (102.9 F) | 1981 | 33.3 C (91.9 F) | 75 |
| Coldest night (TNn) | -15.0 C (5.0 F) | 1919 | -7.8 C (18.0 F) | 75 |
| Wettest day (Rx1day) | 101.6 mm (4.0 in) | 1963 | 38.4 mm (1.5 in) | 75 |
| Wettest five days (Rx5day) | 163.2 mm (6.4 in) | 1981 | 80.2 mm (3.2 in) | 75 |
| Longest dry spell (CDD) | 82 days | 1914 | 29 days | 75 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1909 | 30.0 C (86.0 F) |
| 1910 | 31.1 C (88.0 F) |
| 1911 | 34.4 C (93.9 F) |
| 1912 | 32.2 C (90.0 F) |
| 1913 | 31.7 C (89.1 F) |
| 1914 | 28.9 C (84.0 F) |
| 1915 | 33.3 C (91.9 F) |
| 1916 | 32.8 C (91.0 F) |
| 1917 | 32.2 C (90.0 F) |
| 1918 | 31.1 C (88.0 F) |
| 1919 | 28.3 C (82.9 F) |
| 1920 | 32.8 C (91.0 F) |
| 1921 | 27.8 C (82.0 F) |
| 1922 | 33.3 C (91.9 F) |
| 1923 | 32.2 C (90.0 F) |
| 1924 | 33.3 C (91.9 F) |
| 1925 | 37.2 C (99.0 F) |
| 1926 | 33.9 C (93.0 F) |
| 1927 | 32.2 C (90.0 F) |
| 1928 | 32.8 C (91.0 F) |
| 1929 | 31.1 C (88.0 F) |
| 1930 | 32.2 C (90.0 F) |
| 1931 | 35.6 C (96.1 F) |
| 1932 | 32.2 C (90.0 F) |
| 1933 | 33.3 C (91.9 F) |
| 1934 | 31.1 C (88.0 F) |
| 1935 | 33.9 C (93.0 F) |
| 1936 | 34.4 C (93.9 F) |
| 1937 | 32.8 C (91.0 F) |
| 1938 | 32.8 C (91.0 F) |
| 1939 | 34.4 C (93.9 F) |
| 1940 | 32.8 C (91.0 F) |
| 1941 | 36.7 C (98.1 F) |
| 1942 | 36.1 C (97.0 F) |
| 1943 | 31.1 C (88.0 F) |
| 1944 | 35.6 C (96.1 F) |
| 1945 | 32.2 C (90.0 F) |
| 1946 | 33.3 C (91.9 F) |
| 1947 | 31.1 C (88.0 F) |
| 1948 | 31.7 C (89.1 F) |
| 1949 | 33.9 C (93.0 F) |
| 1950 | 32.8 C (91.0 F) |
| 1951 | 36.7 C (98.1 F) |
| 1952 | 33.9 C (93.0 F) |
| 1953 | 33.9 C (93.0 F) |
| 1954 | 27.8 C (82.0 F) |
| 1955 | 36.7 C (98.1 F) |
| 1956 | 35.6 C (96.1 F) |
| 1957 | 30.6 C (87.1 F) |
| 1958 | 35.6 C (96.1 F) |
| 1959 | 32.8 C (91.0 F) |
| 1960 | 35.6 C (96.1 F) |
| 1961 | 35.0 C (95.0 F) |
| 1962 | 30.6 C (87.1 F) |
| 1963 | 33.9 C (93.0 F) |
| 1964 | 31.7 C (89.1 F) |
| 1965 | 35.0 C (95.0 F) |
| 1966 | 32.2 C (90.0 F) |
| 1967 | 36.1 C (97.0 F) |
| 1968 | 33.3 C (91.9 F) |
| 1969 | 35.6 C (96.1 F) |
| 1970 | 35.6 C (96.1 F) |
| 1971 | 36.1 C (97.0 F) |
| 1972 | 36.7 C (98.1 F) |
| 1973 | 33.3 C (91.9 F) |
| 1974 | 33.3 C (91.9 F) |
| 1975 | 31.7 C (89.1 F) |
| 1976 | 30.6 C (87.1 F) |
| 1977 | 35.6 C (96.1 F) |
| 1978 | 35.6 C (96.1 F) |
| 1979 | 36.7 C (98.1 F) |
| 1980 | 31.1 C (88.0 F) |
| 1981 | 39.4 C (102.9 F) |
| 1982 | 35.6 C (96.1 F) |
| 1983 | 35.6 C (96.1 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1909 | -12.2 C (10.0 F) |
| 1910 | -7.8 C (18.0 F) |
| 1911 | -7.8 C (18.0 F) |
| 1912 | -3.9 C (25.0 F) |
| 1913 | -3.3 C (26.1 F) |
| 1914 | -4.4 C (24.1 F) |
| 1915 | -4.4 C (24.1 F) |
| 1916 | -9.4 C (15.1 F) |
| 1917 | -8.9 C (16.0 F) |
| 1918 | -7.8 C (18.0 F) |
| 1919 | -15.0 C (5.0 F) |
| 1920 | -11.7 C (10.9 F) |
| 1921 | -7.8 C (18.0 F) |
| 1922 | -9.4 C (15.1 F) |
| 1923 | -9.4 C (15.1 F) |
| 1924 | -12.2 C (10.0 F) |
| 1925 | -1.7 C (28.9 F) |
| 1926 | -7.2 C (19.0 F) |
| 1927 | -9.4 C (15.1 F) |
| 1928 | -6.1 C (21.0 F) |
| 1929 | -10.0 C (14.0 F) |
| 1930 | -9.4 C (15.1 F) |
| 1931 | -2.8 C (27.0 F) |
| 1932 | -9.4 C (15.1 F) |
| 1933 | -10.6 C (12.9 F) |
| 1934 | -1.1 C (30.0 F) |
| 1935 | -11.1 C (12.0 F) |
| 1936 | -8.3 C (17.1 F) |
| 1937 | -9.4 C (15.1 F) |
| 1938 | -2.8 C (27.0 F) |
| 1939 | -4.4 C (24.1 F) |
| 1940 | -3.3 C (26.1 F) |
| 1941 | -7.2 C (19.0 F) |
| 1942 | -5.6 C (21.9 F) |
| 1943 | -11.1 C (12.0 F) |
| 1944 | -5.6 C (21.9 F) |
| 1945 | -6.1 C (21.0 F) |
| 1946 | -5.6 C (21.9 F) |
| 1947 | -12.2 C (10.0 F) |
| 1948 | -5.6 C (21.9 F) |
| 1949 | -10.6 C (12.9 F) |
| 1950 | -14.4 C (6.1 F) |
| 1951 | -9.4 C (15.1 F) |
| 1952 | -7.8 C (18.0 F) |
| 1953 | -1.1 C (30.0 F) |
| 1954 | -5.6 C (21.9 F) |
| 1955 | -12.2 C (10.0 F) |
| 1956 | -9.4 C (15.1 F) |
| 1957 | -10.6 C (12.9 F) |
| 1958 | -3.9 C (25.0 F) |
| 1959 | -10.0 C (14.0 F) |
| 1960 | -3.9 C (25.0 F) |
| 1961 | -1.7 C (28.9 F) |
| 1962 | -8.9 C (16.0 F) |
| 1963 | -8.3 C (17.1 F) |
| 1964 | -12.2 C (10.0 F) |
| 1965 | -4.4 C (24.1 F) |
| 1966 | -1.7 C (28.9 F) |
| 1967 | -4.4 C (24.1 F) |
| 1968 | -13.3 C (8.1 F) |
| 1969 | -8.9 C (16.0 F) |
| 1970 | -4.4 C (24.1 F) |
| 1971 | -4.4 C (24.1 F) |
| 1972 | -11.1 C (12.0 F) |
| 1973 | -7.8 C (18.0 F) |
| 1974 | -6.1 C (21.0 F) |
| 1975 | -3.9 C (25.0 F) |
| 1976 | -4.4 C (24.1 F) |
| 1977 | -6.1 C (21.0 F) |
| 1978 | -8.9 C (16.0 F) |
| 1979 | -7.8 C (18.0 F) |
| 1980 | -11.1 C (12.0 F) |
| 1981 | -5.0 C (23.0 F) |
| 1982 | -12.8 C (9.0 F) |
| 1983 | -5.6 C (21.9 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1909 | 47.0 mm (1.9 in) |
| 1910 | 43.9 mm (1.7 in) |
| 1911 | 24.9 mm (1.0 in) |
| 1912 | 27.2 mm (1.1 in) |
| 1913 | 29.7 mm (1.2 in) |
| 1914 | 48.3 mm (1.9 in) |
| 1915 | 45.7 mm (1.8 in) |
| 1916 | 34.8 mm (1.4 in) |
| 1917 | 47.2 mm (1.9 in) |
| 1918 | 38.1 mm (1.5 in) |
| 1919 | 38.6 mm (1.5 in) |
| 1920 | 37.6 mm (1.5 in) |
| 1921 | 70.4 mm (2.8 in) |
| 1922 | 88.9 mm (3.5 in) |
| 1923 | 33.8 mm (1.3 in) |
| 1924 | 48.3 mm (1.9 in) |
| 1925 | 28.4 mm (1.1 in) |
| 1926 | 27.2 mm (1.1 in) |
| 1927 | 33.0 mm (1.3 in) |
| 1928 | 33.0 mm (1.3 in) |
| 1929 | 25.7 mm (1.0 in) |
| 1930 | 25.4 mm (1.0 in) |
| 1931 | 41.1 mm (1.6 in) |
| 1932 | 51.6 mm (2.0 in) |
| 1933 | 57.7 mm (2.3 in) |
| 1934 | 36.1 mm (1.4 in) |
| 1935 | 42.9 mm (1.7 in) |
| 1936 | 34.8 mm (1.4 in) |
| 1937 | 64.8 mm (2.6 in) |
| 1938 | 33.0 mm (1.3 in) |
| 1939 | 38.1 mm (1.5 in) |
| 1940 | 39.9 mm (1.6 in) |
| 1941 | 38.4 mm (1.5 in) |
| 1942 | 47.2 mm (1.9 in) |
| 1943 | 54.4 mm (2.1 in) |
| 1944 | 24.1 mm (0.9 in) |
| 1945 | 35.3 mm (1.4 in) |
| 1946 | 31.0 mm (1.2 in) |
| 1947 | 27.7 mm (1.1 in) |
| 1948 | 35.6 mm (1.4 in) |
| 1949 | 35.3 mm (1.4 in) |
| 1950 | 45.7 mm (1.8 in) |
| 1951 | 48.8 mm (1.9 in) |
| 1952 | 34.3 mm (1.4 in) |
| 1953 | 46.0 mm (1.8 in) |
| 1954 | 29.7 mm (1.2 in) |
| 1955 | 40.4 mm (1.6 in) |
| 1956 | 43.7 mm (1.7 in) |
| 1957 | 29.0 mm (1.1 in) |
| 1958 | 25.7 mm (1.0 in) |
| 1959 | 62.5 mm (2.5 in) |
| 1960 | 37.1 mm (1.5 in) |
| 1961 | 35.8 mm (1.4 in) |
| 1962 | 27.9 mm (1.1 in) |
| 1963 | 101.6 mm (4.0 in) |
| 1964 | 35.1 mm (1.4 in) |
| 1965 | 41.1 mm (1.6 in) |
| 1966 | 47.8 mm (1.9 in) |
| 1967 | 33.0 mm (1.3 in) |
| 1968 | 38.6 mm (1.5 in) |
| 1969 | 36.1 mm (1.4 in) |
| 1970 | 39.1 mm (1.5 in) |
| 1971 | 33.8 mm (1.3 in) |
| 1972 | 54.6 mm (2.1 in) |
| 1973 | 42.7 mm (1.7 in) |
| 1974 | 52.1 mm (2.1 in) |
| 1975 | 40.6 mm (1.6 in) |
| 1976 | 20.3 mm (0.8 in) |
| 1977 | 29.5 mm (1.2 in) |
| 1978 | 36.1 mm (1.4 in) |
| 1979 | 44.5 mm (1.8 in) |
| 1980 | 39.4 mm (1.6 in) |
| 1981 | 81.3 mm (3.2 in) |
| 1982 | 50.8 mm (2.0 in) |
| 1983 | 50.8 mm (2.0 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1909 | 90.7 mm (3.6 in) |
| 1910 | 100.5 mm (4.0 in) |
| 1911 | 46.3 mm (1.8 in) |
| 1912 | 83.1 mm (3.3 in) |
| 1913 | 57.7 mm (2.3 in) |
| 1914 | 116.6 mm (4.6 in) |
| 1915 | 82.9 mm (3.3 in) |
| 1916 | 100.5 mm (4.0 in) |
| 1917 | 80.2 mm (3.2 in) |
| 1918 | 60.8 mm (2.4 in) |
| 1919 | 95.7 mm (3.8 in) |
| 1920 | 81.5 mm (3.2 in) |
| 1921 | 153.0 mm (6.0 in) |
| 1922 | 99.6 mm (3.9 in) |
| 1923 | 67.0 mm (2.6 in) |
| 1924 | 75.4 mm (3.0 in) |
| 1925 | 75.0 mm (3.0 in) |
| 1926 | 61.5 mm (2.4 in) |
| 1927 | 56.4 mm (2.2 in) |
| 1928 | 80.8 mm (3.2 in) |
| 1929 | 67.9 mm (2.7 in) |
| 1930 | 44.2 mm (1.7 in) |
| 1931 | 69.9 mm (2.8 in) |
| 1932 | 100.4 mm (4.0 in) |
| 1933 | 137.0 mm (5.4 in) |
| 1934 | 76.4 mm (3.0 in) |
| 1935 | 114.2 mm (4.5 in) |
| 1936 | 84.1 mm (3.3 in) |
| 1937 | 146.6 mm (5.8 in) |
| 1938 | 91.2 mm (3.6 in) |
| 1939 | 88.1 mm (3.5 in) |
| 1940 | 79.8 mm (3.1 in) |
| 1941 | 88.3 mm (3.5 in) |
| 1942 | 86.2 mm (3.4 in) |
| 1943 | 81.2 mm (3.2 in) |
| 1944 | 53.4 mm (2.1 in) |
| 1945 | 93.5 mm (3.7 in) |
| 1946 | 67.9 mm (2.7 in) |
| 1947 | 53.2 mm (2.1 in) |
| 1948 | 67.4 mm (2.7 in) |
| 1949 | 78.5 mm (3.1 in) |
| 1950 | 111.6 mm (4.4 in) |
| 1951 | 106.1 mm (4.2 in) |
| 1952 | 46.5 mm (1.8 in) |
| 1953 | 90.5 mm (3.6 in) |
| 1954 | 90.4 mm (3.6 in) |
| 1955 | 99.1 mm (3.9 in) |
| 1956 | 105.0 mm (4.1 in) |
| 1957 | 60.5 mm (2.4 in) |
| 1958 | 43.5 mm (1.7 in) |
| 1959 | 121.2 mm (4.8 in) |
| 1960 | 68.8 mm (2.7 in) |
| 1961 | 65.3 mm (2.6 in) |
| 1962 | 64.0 mm (2.5 in) |
| 1963 | 101.6 mm (4.0 in) |
| 1964 | 61.4 mm (2.4 in) |
| 1965 | 76.4 mm (3.0 in) |
| 1966 | 78.2 mm (3.1 in) |
| 1967 | 74.2 mm (2.9 in) |
| 1968 | 97.0 mm (3.8 in) |
| 1969 | 80.0 mm (3.1 in) |
| 1970 | 91.2 mm (3.6 in) |
| 1971 | 58.2 mm (2.3 in) |
| 1972 | 108.3 mm (4.3 in) |
| 1973 | 90.6 mm (3.6 in) |
| 1974 | 74.3 mm (2.9 in) |
| 1975 | 80.0 mm (3.1 in) |
| 1976 | 48.5 mm (1.9 in) |
| 1977 | 73.9 mm (2.9 in) |
| 1978 | 68.6 mm (2.7 in) |
| 1979 | 107.7 mm (4.2 in) |
| 1980 | 60.2 mm (2.4 in) |
| 1981 | 163.2 mm (6.4 in) |
| 1982 | 69.3 mm (2.7 in) |
| 1983 | 85.6 mm (3.4 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1909 | 44 days |
| 1910 | 44 days |
| 1911 | 13 days |
| 1912 | 2 days |
| 1913 | 6 days |
| 1914 | 82 days |
| 1915 | 45 days |
| 1916 | 21 days |
| 1917 | 47 days |
| 1918 | 30 days |
| 1919 | 10 days |
| 1920 | 40 days |
| 1921 | 43 days |
| 1922 | 67 days |
| 1923 | 28 days |
| 1924 | 25 days |
| 1925 | 30 days |
| 1926 | 64 days |
| 1927 | 38 days |
| 1928 | 26 days |
| 1929 | 45 days |
| 1930 | 76 days |
| 1931 | 54 days |
| 1932 | 20 days |
| 1933 | 27 days |
| 1934 | 31 days |
| 1935 | 22 days |
| 1936 | 43 days |
| 1937 | 24 days |
| 1938 | 35 days |
| 1939 | 28 days |
| 1940 | 43 days |
| 1941 | 25 days |
| 1942 | 41 days |
| 1943 | 24 days |
| 1944 | 18 days |
| 1945 | 34 days |
| 1946 | 43 days |
| 1947 | 22 days |
| 1948 | 12 days |
| 1949 | 19 days |
| 1950 | 27 days |
| 1951 | 38 days |
| 1952 | 51 days |
| 1953 | 29 days |
| 1954 | 27 days |
| 1955 | 43 days |
| 1956 | 27 days |
| 1957 | 25 days |
| 1958 | 39 days |
| 1959 | 37 days |
| 1960 | 54 days |
| 1961 | 21 days |
| 1962 | 27 days |
| 1963 | 26 days |
| 1964 | 14 days |
| 1965 | 23 days |
| 1966 | 20 days |
| 1967 | 71 days |
| 1968 | 24 days |
| 1969 | 24 days |
| 1970 | 25 days |
| 1971 | 41 days |
| 1972 | 33 days |
| 1973 | 23 days |
| 1974 | 31 days |
| 1975 | 39 days |
| 1976 | 15 days |
| 1977 | 41 days |
| 1978 | 16 days |
| 1979 | 35 days |
| 1980 | 28 days |
| 1981 | 32 days |
| 1982 | 30 days |
| 1983 | 15 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
58 years with a frostAcross 58 years with a frost, the median last spring frost at Seattle UNIV of Washin falls on 26 March and the median first autumn frost on 18 November, which leaves a median of 241 days between them.
Fitted over all years, the growing season changes by +1.1 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1944 to 1982) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 26 March | n/a | 26 March | n/a | -0.4 days per decade |
| First autumn frost | 18 November | n/a | 19 November | n/a | +0.7 days per decade |
| Growing days | 241 days | n/a | 237 days | n/a | +1.1 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
49 years, 1923 to 1982A day with at least 38.1 mm (1.5 in) of rain is expected about once in 2 years. A day with at least 78.0 mm (3.1 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 38.1 mm (1.5 in) | |
| 5 years | 48.4 mm (1.9 in) | |
| 10 years | 55.4 mm (2.2 in) | |
| 25 years | 64.3 mm (2.5 in) | |
| 50 years | 71.1 mm (2.8 in) | Longer than the 49 years of record |
| 100 years | 78.0 mm (3.1 in) | Longer than the 49 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, 49 years of values from 1923 to 1982.
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: 81.3 mm (3.2 in) in 1981; 64.8 mm (2.6 in) in 1937; 62.5 mm (2.5 in) in 1959.
Station Changes
1 suspectedOne change was suspected in the annual mean temperature of Seattle UNIV of Washin, at 1942. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1942 ran 0.2 C (0.3 F) higher than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1942 | +0.2 | +0.3 | likely | 5 |
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
Download the Data
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 . Last revised (2025-12-31).