Washington Weather Records (USW00093725)
Record envelope, standing records and threshold days for Washington (USW00093725), District of Columbia, United States, with 115 years of record.
Key Facts for Washington
- Washington (USW00093725) is a weather station in District of Columbia, United States at 38.91 latitude and -77.05 longitude, 34 m (112 ft) above sea level.
- The station reports from 1851 to 1965, 115 years of record.
- 1,464 records set at Washington still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Washington set a daily record high maximum temperature of 20.6 C (69.1 F) on 31 December 1965.
About the Station
- Location: District of Columbia, United States, 38.91 latitude, -77.05 longitude.
- Elevation: 34 m (112 ft).
- Period of record: 1851 to 1965, 115 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 | 26.7 C (80.1 F) | -25.6 C (-14.1 F) | n/a | n/a |
| Feb | 28.9 C (84.0 F) | -26.1 C (-15.0 F) | n/a | n/a |
| Mar | 33.9 C (93.0 F) | -15.6 C (3.9 F) | n/a | n/a |
| Apr | 35.6 C (96.1 F) | -9.4 C (15.1 F) | n/a | n/a |
| May | 36.1 C (97.0 F) | 0.0 C (32.0 F) | n/a | n/a |
| Jun | 38.9 C (102.0 F) | 6.1 C (43.0 F) | n/a | n/a |
| Jul | 41.1 C (106.0 F) | 11.1 C (52.0 F) | n/a | n/a |
| Aug | 41.1 C (106.0 F) | 9.4 C (48.9 F) | n/a | n/a |
| Sep | 40.2 C (104.4 F) | 2.2 C (36.0 F) | n/a | n/a |
| Oct | 35.6 C (96.1 F) | -3.3 C (26.1 F) | n/a | n/a |
| Nov | 30.6 C (87.1 F) | -11.7 C (10.9 F) | n/a | n/a |
| Dec | 23.3 C (73.9 F) | -25.0 C (-13.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1851 | 11 |
| 1856 | 2 |
| 1858 | 8 |
| 1872 | 20 |
| 1873 | 18 |
| 1874 | 26 |
| 1875 | 26 |
| 1876 | 24 |
| 1877 | 22 |
| 1878 | 7 |
| 1879 | 27 |
| 1880 | 33 |
| 1881 | 27 |
| 1882 | 11 |
| 1883 | 15 |
| 1884 | 17 |
| 1885 | 14 |
| 1886 | 20 |
| 1887 | 10 |
| 1888 | 18 |
| 1889 | 9 |
| 1890 | 20 |
| 1891 | 18 |
| 1892 | 9 |
| 1893 | 15 |
| 1894 | 15 |
| 1895 | 35 |
| 1896 | 29 |
| 1897 | 14 |
| 1898 | 18 |
| 1899 | 23 |
| 1900 | 20 |
| 1901 | 11 |
| 1902 | 12 |
| 1903 | 14 |
| 1904 | 18 |
| 1905 | 13 |
| 1906 | 10 |
| 1907 | 20 |
| 1908 | 13 |
| 1909 | 8 |
| 1910 | 8 |
| 1911 | 14 |
| 1912 | 14 |
| 1913 | 11 |
| 1914 | 16 |
| 1915 | 12 |
| 1916 | 9 |
| 1917 | 15 |
| 1918 | 17 |
| 1919 | 10 |
| 1920 | 11 |
| 1921 | 11 |
| 1922 | 6 |
| 1923 | 15 |
| 1924 | 9 |
| 1925 | 24 |
| 1926 | 15 |
| 1927 | 10 |
| 1928 | 17 |
| 1929 | 15 |
| 1930 | 33 |
| 1931 | 8 |
| 1932 | 19 |
| 1933 | 11 |
| 1934 | 13 |
| 1935 | 16 |
| 1936 | 20 |
| 1937 | 8 |
| 1938 | 12 |
| 1939 | 14 |
| 1940 | 14 |
| 1941 | 15 |
| 1942 | 12 |
| 1943 | 10 |
| 1944 | 3 |
| 1945 | 18 |
| 1946 | 12 |
| 1947 | 17 |
| 1948 | 14 |
| 1949 | 13 |
| 1950 | 23 |
| 1951 | 15 |
| 1952 | 13 |
| 1953 | 18 |
| 1954 | 22 |
| 1955 | 8 |
| 1956 | 13 |
| 1957 | 15 |
| 1958 | 7 |
| 1959 | 17 |
| 1960 | 10 |
| 1961 | 11 |
| 1962 | 10 |
| 1963 | 18 |
| 1964 | 10 |
| 1965 | 13 |
All-Time Record Progression
3 new records| Date | Kind | Detail |
|---|---|---|
| 1918-08-06 | Record high maximum temperature | Record high maximum temperature 41.1 C (106.0 F) |
| 1922-01-28 | Record daily snowfall | Record daily snowfall 53.3 cm (21.0 in) |
| 1933-08-23 | Record daily precipitation | Record daily precipitation 162.3 mm (6.4 in) |
Wettest Day of Each Month
Aug: 162.3 mm (6.4 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 70.4 mm (2.8 in) | 12 January 1915 |
| Feb | 95.3 mm (3.8 in) | 21 February 1854 |
| Mar | 70.9 mm (2.8 in) | 9 March 1881 |
| Apr | 81.5 mm (3.2 in) | 26 April 1889 |
| May | 80.0 mm (3.1 in) | 19 May 1900 |
| Jun | 105.7 mm (4.2 in) | 22 June 1886 |
| Jul | 108.0 mm (4.3 in) | 30 July 1878 |
| Aug | 162.3 mm (6.4 in) | 23 August 1933 |
| Sep | 131.1 mm (5.2 in) | 1 September 1922 |
| Oct | 101.1 mm (4.0 in) | 4 October 1877 |
| Nov | 74.9 mm (2.9 in) | 8 November 1943 |
| Dec | 65.3 mm (2.6 in) | 29 December 1901 |
Period of Record Coverage
1851 to 1965| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1851 | 241 | 66% | No |
| 1856 | 29 | 8% | No |
| 1858 | 146 | 40% | No |
| 1872 | 362 | 99% | Yes |
| 1873 | 365 | 100% | Yes |
| 1874 | 365 | 100% | Yes |
| 1875 | 365 | 100% | Yes |
| 1876 | 366 | 100% | Yes |
| 1877 | 365 | 100% | Yes |
| 1878 | 365 | 100% | Yes |
| 1879 | 365 | 100% | Yes |
| 1880 | 366 | 100% | Yes |
| 1881 | 365 | 100% | Yes |
| 1882 | 365 | 100% | Yes |
| 1883 | 365 | 100% | Yes |
| 1884 | 366 | 100% | Yes |
| 1885 | 365 | 100% | Yes |
| 1886 | 365 | 100% | Yes |
| 1887 | 365 | 100% | Yes |
| 1888 | 366 | 100% | Yes |
| 1889 | 365 | 100% | Yes |
| 1890 | 365 | 100% | Yes |
| 1891 | 365 | 100% | Yes |
| 1892 | 366 | 100% | Yes |
| 1893 | 365 | 100% | Yes |
| 1894 | 365 | 100% | Yes |
| 1895 | 365 | 100% | Yes |
| 1896 | 366 | 100% | Yes |
| 1897 | 365 | 100% | Yes |
| 1898 | 365 | 100% | Yes |
| 1899 | 365 | 100% | Yes |
| 1900 | 365 | 100% | Yes |
| 1901 | 365 | 100% | Yes |
| 1902 | 365 | 100% | Yes |
| 1903 | 365 | 100% | Yes |
| 1904 | 366 | 100% | Yes |
| 1905 | 365 | 100% | Yes |
| 1906 | 365 | 100% | Yes |
| 1907 | 365 | 100% | Yes |
| 1908 | 366 | 100% | Yes |
| 1909 | 365 | 100% | Yes |
| 1910 | 365 | 100% | Yes |
| 1911 | 365 | 100% | Yes |
| 1912 | 366 | 100% | Yes |
| 1913 | 365 | 100% | Yes |
| 1914 | 365 | 100% | Yes |
| 1915 | 365 | 100% | Yes |
| 1916 | 366 | 100% | Yes |
| 1917 | 365 | 100% | Yes |
| 1918 | 365 | 100% | Yes |
| 1919 | 365 | 100% | Yes |
| 1920 | 366 | 100% | Yes |
| 1921 | 365 | 100% | Yes |
| 1922 | 365 | 100% | Yes |
| 1923 | 365 | 100% | Yes |
| 1924 | 366 | 100% | Yes |
| 1925 | 365 | 100% | Yes |
| 1926 | 365 | 100% | Yes |
| 1927 | 365 | 100% | Yes |
| 1928 | 366 | 100% | Yes |
| 1929 | 365 | 100% | Yes |
| 1930 | 365 | 100% | Yes |
| 1931 | 365 | 100% | Yes |
| 1932 | 366 | 100% | Yes |
| 1933 | 365 | 100% | Yes |
| 1934 | 365 | 100% | Yes |
| 1935 | 365 | 100% | Yes |
| 1936 | 366 | 100% | Yes |
| 1937 | 365 | 100% | Yes |
| 1938 | 365 | 100% | Yes |
| 1939 | 365 | 100% | Yes |
| 1940 | 366 | 100% | Yes |
| 1941 | 365 | 100% | Yes |
| 1942 | 365 | 100% | Yes |
| 1943 | 365 | 100% | Yes |
| 1944 | 366 | 100% | Yes |
| 1945 | 365 | 100% | Yes |
| 1946 | 365 | 100% | Yes |
| 1947 | 365 | 100% | Yes |
| 1948 | 366 | 100% | Yes |
| 1949 | 365 | 100% | Yes |
| 1950 | 365 | 100% | Yes |
| 1951 | 365 | 100% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 365 | 100% | Yes |
| 1955 | 365 | 100% | Yes |
| 1956 | 366 | 100% | Yes |
| 1957 | 364 | 100% | Yes |
| 1958 | 365 | 100% | Yes |
| 1959 | 365 | 100% | Yes |
| 1960 | 366 | 100% | Yes |
| 1961 | 359 | 98% | Yes |
| 1962 | 346 | 95% | Yes |
| 1963 | 365 | 100% | Yes |
| 1964 | 363 | 99% | Yes |
| 1965 | 364 | 100% | Yes |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 31 December 1965 | Washington, US | daily high max | 20.6 C (69.1 F) | 1.4 C (2.5 F) | 80 years | 36 of 100 (Notable) |
| 29 October 1965 | Washington, US | daily low min | -1.7 C (28.9 F) | 0.6 C (1.1 F) | 86 years | 37 of 100 (Notable) |
| 7 October 1965 | Washington, US | daily rain | 45.7 mm (1.8 in) | 21.6 mm (0.9 in) | 14 years | 29 of 100 (Routine) |
| 21 September 1965 | Washington, US | daily high min | 22.2 C (72.0 F) | 0.5 C (0.9 F) | 42 years | 23 of 100 (Routine) |
| 20 September 1965 | Washington, US | daily high min (Tie) | 21.7 C (71.1 F) | tie | 59 years | 6 of 100 (Routine) |
| 29 August 1965 | Washington, US | daily low min (Tie) | 10.0 C (50.0 F) | tie | 90 years | 9 of 100 (Routine) |
| 18 August 1965 | Washington, US | daily high max | 37.8 C (100.0 F) | 2.8 C (5.0 F) | 36 years | 27 of 100 (Routine) |
| 21 July 1965 | Washington, US | daily low min | 12.8 C (55.0 F) | 0.5 C (0.9 F) | 74 years | 33 of 100 (Routine) |
| 27 June 1965 | Washington, US | daily low min (Tie) | 13.9 C (57.0 F) | tie | 56 years | 6 of 100 (Routine) |
| 26 June 1965 | Washington, US | daily low min | 12.8 C (55.0 F) | 1.1 C (2.0 F) | 91 years | 40 of 100 (Notable) |
| 18 June 1965 | Washington, US | daily low max | 20.0 C (68.0 F) | 0.6 C (1.1 F) | 86 years | 37 of 100 (Notable) |
| 18 June 1965 | Washington, US | daily low min | 8.9 C (48.0 F) | 1.1 C (2.0 F) | 6 years | 14 of 100 (Routine) |
| 17 June 1965 | Washington, US | daily low max | 16.7 C (62.1 F) | 0.5 C (0.9 F) | 64 years | 30 of 100 (Routine) |
| 16 June 1965 | Washington, US | daily low max | 13.3 C (55.9 F) | 2.8 C (5.0 F) | 64 years | 35 of 100 (Notable) |
| 3 May 1965 | Washington, US | daily high max | 32.8 C (91.0 F) | 0.6 C (1.1 F) | 52 years | 26 of 100 (Routine) |
| 25 April 1965 | Washington, US | daily low max | 6.1 C (43.0 F) | 0.6 C (1.1 F) | 88 years | 36 of 100 (Notable) |
| 17 March 1965 | Washington, US | daily rain | 20.1 mm (0.8 in) | 1.3 mm (0.05 in) | 28 years | 19 of 100 (Routine) |
| 5 March 1965 | Washington, US | daily rain | 44.5 mm (1.8 in) | 12.2 mm (0.5 in) | 63 years | 40 of 100 (Notable) |
| 8 February 1965 | Washington, US | daily high min (Tie) | 5.6 C (42.1 F) | tie | 82 years | 8 of 100 (Routine) |
| 7 February 1965 | Washington, US | daily rain | 41.1 mm (1.6 in) | 8.1 mm (0.32 in) | 14 years | 22 of 100 (Routine) |
Climate Trend
94 complete years, 1872 to 1965| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1872 | 12.8 C | -0.47 C |
| 1873 | 12.8 C | -0.45 C |
| 1874 | 13.2 C | -0.10 C |
| 1875 | 11.3 C | -2.00 C |
| 1876 | 12.5 C | -0.75 C |
| 1877 | 13.2 C | -0.06 C |
| 1878 | 13.5 C | +0.23 C |
| 1879 | 13.0 C | -0.33 C |
| 1880 | 13.3 C | +0.02 C |
| 1881 | 13.5 C | +0.22 C |
| 1882 | 12.9 C | -0.37 C |
| 1883 | 12.5 C | -0.82 C |
| 1884 | 13.2 C | -0.14 C |
| 1885 | 11.9 C | -1.40 C |
| 1886 | 12.1 C | -1.21 C |
| 1887 | 12.7 C | -0.55 C |
| 1888 | 12.1 C | -1.22 C |
| 1889 | 12.9 C | -0.44 C |
| 1890 | 13.5 C | +0.21 C |
| 1891 | 12.9 C | -0.38 C |
| 1892 | 12.2 C | -1.06 C |
| 1893 | 12.1 C | -1.22 C |
| 1894 | 13.6 C | +0.26 C |
| 1895 | 12.3 C | -0.95 C |
| 1896 | 13.1 C | -0.24 C |
| 1897 | 12.7 C | -0.56 C |
| 1898 | 13.4 C | +0.11 C |
| 1899 | 12.5 C | -0.84 C |
| 1900 | 13.6 C | +0.33 C |
| 1901 | 12.3 C | -1.03 C |
| 1902 | 12.7 C | -0.60 C |
| 1903 | 12.4 C | -0.88 C |
| 1904 | 11.2 C | -2.08 C |
| 1905 | 12.3 C | -1.01 C |
| 1906 | 13.3 C | -0.02 C |
| 1907 | 11.9 C | -1.35 C |
| 1908 | 13.0 C | -0.28 C |
| 1909 | 12.9 C | -0.38 C |
| 1910 | 12.9 C | -0.36 C |
| 1911 | 13.6 C | +0.27 C |
| 1912 | 12.5 C | -0.80 C |
| 1913 | 14.1 C | +0.79 C |
| 1914 | 12.7 C | -0.56 C |
| 1915 | 13.1 C | -0.19 C |
| 1916 | 12.8 C | -0.53 C |
| 1917 | 11.7 C | -1.60 C |
| 1918 | 13.1 C | -0.17 C |
| 1919 | 13.6 C | +0.27 C |
| 1920 | 12.6 C | -0.69 C |
| 1921 | 14.4 C | +1.13 C |
| 1922 | 13.6 C | +0.29 C |
| 1923 | 13.4 C | +0.10 C |
| 1924 | 12.3 C | -1.01 C |
| 1925 | 13.4 C | +0.09 C |
| 1926 | 12.5 C | -0.80 C |
| 1927 | 13.5 C | +0.19 C |
| 1928 | 13.3 C | +0.05 C |
| 1929 | 13.6 C | +0.32 C |
| 1930 | 14.2 C | +0.87 C |
| 1931 | 14.6 C | +1.30 C |
| 1932 | 14.1 C | +0.76 C |
| 1933 | 14.0 C | +0.67 C |
| 1934 | 13.3 C | 0.00 C |
| 1935 | 13.2 C | -0.06 C |
| 1936 | 13.5 C | +0.19 C |
| 1937 | 13.6 C | +0.26 C |
| 1938 | 14.2 C | +0.91 C |
| 1939 | 14.4 C | +1.06 C |
| 1940 | 12.7 C | -0.64 C |
| 1941 | 14.3 C | +0.97 C |
| 1942 | 14.0 C | +0.72 C |
| 1943 | 13.8 C | +0.53 C |
| 1944 | 13.8 C | +0.55 C |
| 1945 | 14.0 C | +0.75 C |
| 1946 | 14.7 C | +1.44 C |
| 1947 | 13.9 C | +0.59 C |
| 1948 | 14.0 C | +0.66 C |
| 1949 | 15.3 C | +1.97 C |
| 1950 | 13.9 C | +0.60 C |
| 1951 | 14.2 C | +0.94 C |
| 1952 | 14.4 C | +1.12 C |
| 1953 | 15.2 C | +1.94 C |
| 1954 | 14.5 C | +1.19 C |
| 1955 | 14.2 C | +0.91 C |
| 1956 | 14.0 C | +0.70 C |
| 1957 | 14.4 C | +1.14 C |
| 1958 | 13.0 C | -0.28 C |
| 1959 | 14.7 C | +1.40 C |
| 1960 | 13.6 C | +0.29 C |
| 1961 | 13.9 C | +0.64 C |
| 1962 | 13.4 C | +0.08 C |
| 1963 | 13.9 C | +0.64 C |
| 1964 | 14.0 C | +0.66 C |
| 1965 | 13.0 C | -0.32 C |
The annual mean temperature here has risen by 0.2 C (0.1 to 0.2) per decade over 1872 to 1965. In Fahrenheit: 0.3 F (0.3 to 0.4) per decade. The slope is a straight line fitted to 94 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 (0.3 to 0.4) per decade | 1872 to 1965 | 94 | Rise |
| Mean daily maximum | 0.2 C (0.1 to 0.2) per decade | 0.3 F (0.2 to 0.4) per decade | 1872 to 1965 | 94 | Rise |
| Mean daily minimum | 0.2 C (0.1 to 0.2) per decade | 0.4 F (0.3 to 0.4) per decade | 1872 to 1965 | 94 | 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
1851 to 1965| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 41.1 C (106.0 F) | 1918 | 36.7 C (98.1 F) | 97 |
| Coldest night (TNn) | -26.1 C (-15.0 F) | 1899 | -13.9 C (7.0 F) | 97 |
| Wettest day (Rx1day) | 162.3 mm (6.4 in) | 1933 | 62.7 mm (2.5 in) | 103 |
| Wettest five days (Rx5day) | 220.2 mm (8.7 in) | 1928 | 97.8 mm (3.9 in) | 103 |
| Longest dry spell (CDD) | 55 days | 1858 | 18 days | 103 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1851 | 37.2 C (99.0 F) |
| 1852 | n/a |
| 1853 | n/a |
| 1854 | n/a |
| 1855 | n/a |
| 1856 | 26.7 C (80.1 F) |
| 1857 | n/a |
| 1858 | 37.8 C (100.0 F) |
| 1859 | n/a |
| 1871 | n/a |
| 1872 | 38.3 C (100.9 F) |
| 1873 | 38.3 C (100.9 F) |
| 1874 | 38.9 C (102.0 F) |
| 1875 | 36.7 C (98.1 F) |
| 1876 | 36.7 C (98.1 F) |
| 1877 | 36.7 C (98.1 F) |
| 1878 | 36.7 C (98.1 F) |
| 1879 | 38.9 C (102.0 F) |
| 1880 | 36.7 C (98.1 F) |
| 1881 | 40.2 C (104.4 F) |
| 1882 | 35.0 C (95.0 F) |
| 1883 | 36.2 C (97.2 F) |
| 1884 | 36.1 C (97.0 F) |
| 1885 | 37.3 C (99.1 F) |
| 1886 | 33.3 C (91.9 F) |
| 1887 | 39.3 C (102.7 F) |
| 1888 | 36.2 C (97.2 F) |
| 1889 | 33.9 C (93.0 F) |
| 1890 | 36.7 C (98.1 F) |
| 1891 | 35.0 C (95.0 F) |
| 1892 | 37.2 C (99.0 F) |
| 1893 | 36.1 C (97.0 F) |
| 1894 | 36.7 C (98.1 F) |
| 1895 | 36.7 C (98.1 F) |
| 1896 | 36.7 C (98.1 F) |
| 1897 | 36.1 C (97.0 F) |
| 1898 | 38.3 C (100.9 F) |
| 1899 | 36.1 C (97.0 F) |
| 1900 | 38.3 C (100.9 F) |
| 1901 | 38.9 C (102.0 F) |
| 1902 | 37.2 C (99.0 F) |
| 1903 | 35.6 C (96.1 F) |
| 1904 | 34.4 C (93.9 F) |
| 1905 | 35.0 C (95.0 F) |
| 1906 | 35.0 C (95.0 F) |
| 1907 | 33.9 C (93.0 F) |
| 1908 | 37.2 C (99.0 F) |
| 1909 | 35.6 C (96.1 F) |
| 1910 | 35.0 C (95.0 F) |
| 1911 | 38.3 C (100.9 F) |
| 1912 | 34.4 C (93.9 F) |
| 1913 | 36.1 C (97.0 F) |
| 1914 | 36.7 C (98.1 F) |
| 1915 | 36.1 C (97.0 F) |
| 1916 | 36.1 C (97.0 F) |
| 1917 | 37.2 C (99.0 F) |
| 1918 | 41.1 C (106.0 F) |
| 1919 | 38.3 C (100.9 F) |
| 1920 | 35.0 C (95.0 F) |
| 1921 | 35.6 C (96.1 F) |
| 1922 | 35.0 C (95.0 F) |
| 1923 | 36.7 C (98.1 F) |
| 1924 | 38.9 C (102.0 F) |
| 1925 | 37.8 C (100.0 F) |
| 1926 | 40.0 C (104.0 F) |
| 1927 | 36.1 C (97.0 F) |
| 1928 | 36.1 C (97.0 F) |
| 1929 | 36.1 C (97.0 F) |
| 1930 | 41.1 C (106.0 F) |
| 1931 | 37.2 C (99.0 F) |
| 1932 | 37.8 C (100.0 F) |
| 1933 | 37.8 C (100.0 F) |
| 1934 | 38.3 C (100.9 F) |
| 1935 | 36.7 C (98.1 F) |
| 1936 | 40.6 C (105.1 F) |
| 1937 | 36.1 C (97.0 F) |
| 1938 | 35.6 C (96.1 F) |
| 1939 | 37.8 C (100.0 F) |
| 1940 | 37.8 C (100.0 F) |
| 1941 | 37.2 C (99.0 F) |
| 1942 | 37.2 C (99.0 F) |
| 1943 | 37.8 C (100.0 F) |
| 1944 | 36.1 C (97.0 F) |
| 1945 | 37.2 C (99.0 F) |
| 1946 | 35.6 C (96.1 F) |
| 1947 | 36.1 C (97.0 F) |
| 1948 | 37.8 C (100.0 F) |
| 1949 | 37.8 C (100.0 F) |
| 1950 | 35.0 C (95.0 F) |
| 1951 | 35.6 C (96.1 F) |
| 1952 | 38.3 C (100.9 F) |
| 1953 | 39.4 C (102.9 F) |
| 1954 | 40.0 C (104.0 F) |
| 1955 | 37.8 C (100.0 F) |
| 1956 | 36.1 C (97.0 F) |
| 1957 | 38.3 C (100.9 F) |
| 1958 | 36.1 C (97.0 F) |
| 1959 | 38.3 C (100.9 F) |
| 1960 | 35.6 C (96.1 F) |
| 1961 | 35.0 C (95.0 F) |
| 1962 | 36.7 C (98.1 F) |
| 1963 | 36.7 C (98.1 F) |
| 1964 | 36.7 C (98.1 F) |
| 1965 | 37.8 C (100.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1851 | -4.4 C (24.1 F) |
| 1852 | n/a |
| 1853 | n/a |
| 1854 | n/a |
| 1855 | n/a |
| 1856 | 2.2 C (36.0 F) |
| 1857 | n/a |
| 1858 | 0.3 C (32.5 F) |
| 1859 | n/a |
| 1871 | n/a |
| 1872 | -16.1 C (3.0 F) |
| 1873 | -21.1 C (-6.0 F) |
| 1874 | -12.8 C (9.0 F) |
| 1875 | -19.4 C (-2.9 F) |
| 1876 | -15.6 C (3.9 F) |
| 1877 | -19.4 C (-2.9 F) |
| 1878 | -17.8 C (0.0 F) |
| 1879 | -17.8 C (0.0 F) |
| 1880 | -25.0 C (-13.0 F) |
| 1881 | -25.6 C (-14.1 F) |
| 1882 | -13.4 C (7.9 F) |
| 1883 | -12.6 C (9.3 F) |
| 1884 | -16.8 C (1.8 F) |
| 1885 | -16.4 C (2.5 F) |
| 1886 | -19.1 C (-2.4 F) |
| 1887 | -14.3 C (6.3 F) |
| 1888 | -12.7 C (9.1 F) |
| 1889 | -15.6 C (3.9 F) |
| 1890 | -10.6 C (12.9 F) |
| 1891 | -9.4 C (15.1 F) |
| 1892 | -15.6 C (3.9 F) |
| 1893 | -21.1 C (-6.0 F) |
| 1894 | -14.4 C (6.1 F) |
| 1895 | -17.8 C (0.0 F) |
| 1896 | -13.3 C (8.1 F) |
| 1897 | -13.3 C (8.1 F) |
| 1898 | -16.7 C (1.9 F) |
| 1899 | -26.1 C (-15.0 F) |
| 1900 | -14.4 C (6.1 F) |
| 1901 | -13.9 C (7.0 F) |
| 1902 | -15.0 C (5.0 F) |
| 1903 | -16.1 C (3.0 F) |
| 1904 | -16.7 C (1.9 F) |
| 1905 | -18.9 C (-2.0 F) |
| 1906 | -13.9 C (7.0 F) |
| 1907 | -16.1 C (3.0 F) |
| 1908 | -14.4 C (6.1 F) |
| 1909 | -13.3 C (8.1 F) |
| 1910 | -13.3 C (8.1 F) |
| 1911 | -10.0 C (14.0 F) |
| 1912 | -25.0 C (-13.0 F) |
| 1913 | -10.6 C (12.9 F) |
| 1914 | -18.3 C (-0.9 F) |
| 1915 | -7.8 C (18.0 F) |
| 1916 | -14.4 C (6.1 F) |
| 1917 | -19.4 C (-2.9 F) |
| 1918 | -18.9 C (-2.0 F) |
| 1919 | -13.3 C (8.1 F) |
| 1920 | -12.8 C (9.0 F) |
| 1921 | -11.7 C (10.9 F) |
| 1922 | -12.8 C (9.0 F) |
| 1923 | -11.7 C (10.9 F) |
| 1924 | -14.4 C (6.1 F) |
| 1925 | -16.1 C (3.0 F) |
| 1926 | -13.9 C (7.0 F) |
| 1927 | -13.3 C (8.1 F) |
| 1928 | -13.9 C (7.0 F) |
| 1929 | -13.3 C (8.1 F) |
| 1930 | -14.4 C (6.1 F) |
| 1931 | -8.9 C (16.0 F) |
| 1932 | -10.0 C (14.0 F) |
| 1933 | -13.3 C (8.1 F) |
| 1934 | -21.1 C (-6.0 F) |
| 1935 | -18.9 C (-2.0 F) |
| 1936 | -17.8 C (0.0 F) |
| 1937 | -8.3 C (17.1 F) |
| 1938 | -10.0 C (14.0 F) |
| 1939 | -8.3 C (17.1 F) |
| 1940 | -13.9 C (7.0 F) |
| 1941 | -9.4 C (15.1 F) |
| 1942 | -15.6 C (3.9 F) |
| 1943 | -14.4 C (6.1 F) |
| 1944 | -8.9 C (16.0 F) |
| 1945 | -11.7 C (10.9 F) |
| 1946 | -11.1 C (12.0 F) |
| 1947 | -13.9 C (7.0 F) |
| 1948 | -15.0 C (5.0 F) |
| 1949 | -7.2 C (19.0 F) |
| 1950 | -10.0 C (14.0 F) |
| 1951 | -12.2 C (10.0 F) |
| 1952 | -9.4 C (15.1 F) |
| 1953 | -7.2 C (19.0 F) |
| 1954 | -11.1 C (12.0 F) |
| 1955 | -12.8 C (9.0 F) |
| 1956 | -7.8 C (18.0 F) |
| 1957 | -12.8 C (9.0 F) |
| 1958 | -15.0 C (5.0 F) |
| 1959 | -12.2 C (10.0 F) |
| 1960 | -13.3 C (8.1 F) |
| 1961 | -14.4 C (6.1 F) |
| 1962 | -11.7 C (10.9 F) |
| 1963 | -15.0 C (5.0 F) |
| 1964 | -10.6 C (12.9 F) |
| 1965 | -11.7 C (10.9 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1851 | n/a |
| 1852 | 38.4 mm (1.5 in) |
| 1853 | 49.0 mm (1.9 in) |
| 1854 | 95.3 mm (3.8 in) |
| 1855 | 41.9 mm (1.6 in) |
| 1856 | 82.6 mm (3.3 in) |
| 1857 | 161.3 mm (6.4 in) |
| 1858 | 50.8 mm (2.0 in) |
| 1859 | 101.6 mm (4.0 in) |
| 1871 | 54.9 mm (2.2 in) |
| 1872 | 79.2 mm (3.1 in) |
| 1873 | 58.9 mm (2.3 in) |
| 1874 | 105.4 mm (4.1 in) |
| 1875 | 72.1 mm (2.8 in) |
| 1876 | 104.6 mm (4.1 in) |
| 1877 | 101.1 mm (4.0 in) |
| 1878 | 108.0 mm (4.3 in) |
| 1879 | 60.7 mm (2.4 in) |
| 1880 | 57.9 mm (2.3 in) |
| 1881 | 70.9 mm (2.8 in) |
| 1882 | 50.8 mm (2.0 in) |
| 1883 | 50.3 mm (2.0 in) |
| 1884 | 56.1 mm (2.2 in) |
| 1885 | 68.3 mm (2.7 in) |
| 1886 | 105.7 mm (4.2 in) |
| 1887 | 39.4 mm (1.6 in) |
| 1888 | 75.7 mm (3.0 in) |
| 1889 | 81.5 mm (3.2 in) |
| 1890 | 79.0 mm (3.1 in) |
| 1891 | 46.5 mm (1.8 in) |
| 1892 | 40.9 mm (1.6 in) |
| 1893 | 46.2 mm (1.8 in) |
| 1894 | 43.2 mm (1.7 in) |
| 1895 | 42.7 mm (1.7 in) |
| 1896 | 58.2 mm (2.3 in) |
| 1897 | 71.4 mm (2.8 in) |
| 1898 | 125.0 mm (4.9 in) |
| 1899 | 52.6 mm (2.1 in) |
| 1900 | 88.4 mm (3.5 in) |
| 1901 | 65.3 mm (2.6 in) |
| 1902 | 62.7 mm (2.5 in) |
| 1903 | 74.4 mm (2.9 in) |
| 1904 | 64.0 mm (2.5 in) |
| 1905 | 99.6 mm (3.9 in) |
| 1906 | 69.3 mm (2.7 in) |
| 1907 | 61.0 mm (2.4 in) |
| 1908 | 47.2 mm (1.9 in) |
| 1909 | 61.7 mm (2.4 in) |
| 1910 | 75.4 mm (3.0 in) |
| 1911 | 65.0 mm (2.6 in) |
| 1912 | 74.4 mm (2.9 in) |
| 1913 | 59.4 mm (2.3 in) |
| 1914 | 78.5 mm (3.1 in) |
| 1915 | 76.2 mm (3.0 in) |
| 1916 | 55.4 mm (2.2 in) |
| 1917 | 83.1 mm (3.3 in) |
| 1918 | 54.6 mm (2.1 in) |
| 1919 | 62.7 mm (2.5 in) |
| 1920 | 73.2 mm (2.9 in) |
| 1921 | 51.3 mm (2.0 in) |
| 1922 | 131.1 mm (5.2 in) |
| 1923 | 40.1 mm (1.6 in) |
| 1924 | 70.1 mm (2.8 in) |
| 1925 | 44.7 mm (1.8 in) |
| 1926 | 62.7 mm (2.5 in) |
| 1927 | 64.0 mm (2.5 in) |
| 1928 | 151.6 mm (6.0 in) |
| 1929 | 53.1 mm (2.1 in) |
| 1930 | 55.1 mm (2.2 in) |
| 1931 | 43.2 mm (1.7 in) |
| 1932 | 64.3 mm (2.5 in) |
| 1933 | 162.3 mm (6.4 in) |
| 1934 | 102.1 mm (4.0 in) |
| 1935 | 113.0 mm (4.4 in) |
| 1936 | 61.2 mm (2.4 in) |
| 1937 | 61.2 mm (2.4 in) |
| 1938 | 55.4 mm (2.2 in) |
| 1939 | 114.0 mm (4.5 in) |
| 1940 | 66.0 mm (2.6 in) |
| 1941 | 53.6 mm (2.1 in) |
| 1942 | 102.4 mm (4.0 in) |
| 1943 | 74.9 mm (2.9 in) |
| 1944 | 156.0 mm (6.1 in) |
| 1945 | 57.7 mm (2.3 in) |
| 1946 | 55.6 mm (2.2 in) |
| 1947 | 50.3 mm (2.0 in) |
| 1948 | 65.3 mm (2.6 in) |
| 1949 | 44.2 mm (1.7 in) |
| 1950 | 75.9 mm (3.0 in) |
| 1951 | 61.7 mm (2.4 in) |
| 1952 | 72.6 mm (2.9 in) |
| 1953 | 54.4 mm (2.1 in) |
| 1954 | 47.5 mm (1.9 in) |
| 1955 | 125.5 mm (4.9 in) |
| 1956 | 50.0 mm (2.0 in) |
| 1957 | 44.7 mm (1.8 in) |
| 1958 | 70.9 mm (2.8 in) |
| 1959 | 78.7 mm (3.1 in) |
| 1960 | 53.6 mm (2.1 in) |
| 1961 | 47.5 mm (1.9 in) |
| 1962 | 41.4 mm (1.6 in) |
| 1963 | 108.7 mm (4.3 in) |
| 1964 | 39.9 mm (1.6 in) |
| 1965 | 45.7 mm (1.8 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1851 | n/a |
| 1852 | 67.6 mm (2.7 in) |
| 1853 | 97.8 mm (3.9 in) |
| 1854 | 95.3 mm (3.8 in) |
| 1855 | 66.6 mm (2.6 in) |
| 1856 | 125.0 mm (4.9 in) |
| 1857 | 189.7 mm (7.5 in) |
| 1858 | 77.2 mm (3.0 in) |
| 1859 | 124.7 mm (4.9 in) |
| 1871 | 78.4 mm (3.1 in) |
| 1872 | 100.5 mm (4.0 in) |
| 1873 | 96.9 mm (3.8 in) |
| 1874 | 145.3 mm (5.7 in) |
| 1875 | 83.8 mm (3.3 in) |
| 1876 | 126.2 mm (5.0 in) |
| 1877 | 138.4 mm (5.4 in) |
| 1878 | 167.0 mm (6.6 in) |
| 1879 | 115.0 mm (4.5 in) |
| 1880 | 73.4 mm (2.9 in) |
| 1881 | 84.6 mm (3.3 in) |
| 1882 | 69.3 mm (2.7 in) |
| 1883 | 71.8 mm (2.8 in) |
| 1884 | 150.4 mm (5.9 in) |
| 1885 | 107.9 mm (4.2 in) |
| 1886 | 147.9 mm (5.8 in) |
| 1887 | 50.1 mm (2.0 in) |
| 1888 | 97.3 mm (3.8 in) |
| 1889 | 135.1 mm (5.3 in) |
| 1890 | 86.6 mm (3.4 in) |
| 1891 | 88.4 mm (3.5 in) |
| 1892 | 71.1 mm (2.8 in) |
| 1893 | 72.4 mm (2.9 in) |
| 1894 | 59.4 mm (2.3 in) |
| 1895 | 97.8 mm (3.9 in) |
| 1896 | 77.4 mm (3.0 in) |
| 1897 | 93.8 mm (3.7 in) |
| 1898 | 181.1 mm (7.1 in) |
| 1899 | 87.4 mm (3.4 in) |
| 1900 | 102.9 mm (4.1 in) |
| 1901 | 100.3 mm (3.9 in) |
| 1902 | 79.5 mm (3.1 in) |
| 1903 | 97.5 mm (3.8 in) |
| 1904 | 127.5 mm (5.0 in) |
| 1905 | 115.5 mm (4.5 in) |
| 1906 | 148.8 mm (5.9 in) |
| 1907 | 86.4 mm (3.4 in) |
| 1908 | 79.0 mm (3.1 in) |
| 1909 | 85.5 mm (3.4 in) |
| 1910 | 109.7 mm (4.3 in) |
| 1911 | 110.5 mm (4.4 in) |
| 1912 | 118.8 mm (4.7 in) |
| 1913 | 106.4 mm (4.2 in) |
| 1914 | 118.1 mm (4.6 in) |
| 1915 | 85.1 mm (3.4 in) |
| 1916 | 110.1 mm (4.3 in) |
| 1917 | 99.9 mm (3.9 in) |
| 1918 | 102.7 mm (4.0 in) |
| 1919 | 123.1 mm (4.8 in) |
| 1920 | 73.2 mm (2.9 in) |
| 1921 | 90.1 mm (3.5 in) |
| 1922 | 139.5 mm (5.5 in) |
| 1923 | 63.6 mm (2.5 in) |
| 1924 | 138.5 mm (5.5 in) |
| 1925 | 70.9 mm (2.8 in) |
| 1926 | 94.7 mm (3.7 in) |
| 1927 | 70.3 mm (2.8 in) |
| 1928 | 220.2 mm (8.7 in) |
| 1929 | 109.2 mm (4.3 in) |
| 1930 | 64.7 mm (2.5 in) |
| 1931 | 64.0 mm (2.5 in) |
| 1932 | 101.1 mm (4.0 in) |
| 1933 | 203.0 mm (8.0 in) |
| 1934 | 208.6 mm (8.2 in) |
| 1935 | 178.6 mm (7.0 in) |
| 1936 | 84.3 mm (3.3 in) |
| 1937 | 137.0 mm (5.4 in) |
| 1938 | 67.3 mm (2.6 in) |
| 1939 | 114.0 mm (4.5 in) |
| 1940 | 74.9 mm (2.9 in) |
| 1941 | 74.5 mm (2.9 in) |
| 1942 | 192.9 mm (7.6 in) |
| 1943 | 87.1 mm (3.4 in) |
| 1944 | 159.6 mm (6.3 in) |
| 1945 | 110.9 mm (4.4 in) |
| 1946 | 97.0 mm (3.8 in) |
| 1947 | 76.0 mm (3.0 in) |
| 1948 | 133.9 mm (5.3 in) |
| 1949 | 86.7 mm (3.4 in) |
| 1950 | 132.3 mm (5.2 in) |
| 1951 | 123.2 mm (4.9 in) |
| 1952 | 127.1 mm (5.0 in) |
| 1953 | 103.4 mm (4.1 in) |
| 1954 | 55.2 mm (2.2 in) |
| 1955 | 201.5 mm (7.9 in) |
| 1956 | 60.7 mm (2.4 in) |
| 1957 | 70.9 mm (2.8 in) |
| 1958 | 134.5 mm (5.3 in) |
| 1959 | 79.2 mm (3.1 in) |
| 1960 | 103.2 mm (4.1 in) |
| 1961 | 117.8 mm (4.6 in) |
| 1962 | 49.3 mm (1.9 in) |
| 1963 | 150.4 mm (5.9 in) |
| 1964 | 70.9 mm (2.8 in) |
| 1965 | 51.9 mm (2.0 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1851 | n/a |
| 1852 | 15 days |
| 1853 | 19 days |
| 1854 | 23 days |
| 1855 | 14 days |
| 1856 | 18 days |
| 1857 | 15 days |
| 1858 | 55 days |
| 1859 | 21 days |
| 1871 | 18 days |
| 1872 | 21 days |
| 1873 | 19 days |
| 1874 | 29 days |
| 1875 | 19 days |
| 1876 | 17 days |
| 1877 | 20 days |
| 1878 | 16 days |
| 1879 | 16 days |
| 1880 | 14 days |
| 1881 | 22 days |
| 1882 | 14 days |
| 1883 | 17 days |
| 1884 | 17 days |
| 1885 | 16 days |
| 1886 | 21 days |
| 1887 | 18 days |
| 1888 | 11 days |
| 1889 | 20 days |
| 1890 | 20 days |
| 1891 | 14 days |
| 1892 | 26 days |
| 1893 | 16 days |
| 1894 | 17 days |
| 1895 | 17 days |
| 1896 | 18 days |
| 1897 | 18 days |
| 1898 | 14 days |
| 1899 | 12 days |
| 1900 | 16 days |
| 1901 | 29 days |
| 1902 | 18 days |
| 1903 | 16 days |
| 1904 | 22 days |
| 1905 | 15 days |
| 1906 | 16 days |
| 1907 | 13 days |
| 1908 | 21 days |
| 1909 | 16 days |
| 1910 | 23 days |
| 1911 | 20 days |
| 1912 | 16 days |
| 1913 | 16 days |
| 1914 | 22 days |
| 1915 | 27 days |
| 1916 | 13 days |
| 1917 | 22 days |
| 1918 | 17 days |
| 1919 | 14 days |
| 1920 | 26 days |
| 1921 | 15 days |
| 1922 | 25 days |
| 1923 | 25 days |
| 1924 | 26 days |
| 1925 | 15 days |
| 1926 | 16 days |
| 1927 | 14 days |
| 1928 | 14 days |
| 1929 | 18 days |
| 1930 | 30 days |
| 1931 | 20 days |
| 1932 | 15 days |
| 1933 | 12 days |
| 1934 | 19 days |
| 1935 | 18 days |
| 1936 | 22 days |
| 1937 | 20 days |
| 1938 | 15 days |
| 1939 | 17 days |
| 1940 | 19 days |
| 1941 | 25 days |
| 1942 | 23 days |
| 1943 | 20 days |
| 1944 | 19 days |
| 1945 | 17 days |
| 1946 | 24 days |
| 1947 | 32 days |
| 1948 | 12 days |
| 1949 | 17 days |
| 1950 | 15 days |
| 1951 | 13 days |
| 1952 | 22 days |
| 1953 | 20 days |
| 1954 | 16 days |
| 1955 | 22 days |
| 1956 | 17 days |
| 1957 | 19 days |
| 1958 | 18 days |
| 1959 | 25 days |
| 1960 | 14 days |
| 1961 | 16 days |
| 1962 | 18 days |
| 1963 | 32 days |
| 1964 | 32 days |
| 1965 | 16 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
94 years with a frostAcross 94 years with a frost, the median last spring frost at Washington falls on 6 April and the median first autumn frost on 4 November, which leaves a median of 213 days between them.
In 1936 to 1965 the median growing season was 223 days. That is 15 days more than in 1872 to 1901.
Fitted over all years, the growing season changes by +3.4 days per decade at this station.
| Measure | Median, all years | Earliest period (1872 to 1901) | Recent period (1936 to 1965) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 6 April | 10 April | 29 March | 12 days earlier | -1.7 days per decade |
| First autumn frost | 4 November | 31 October | 8 November | 8 days later | +1.7 days per decade |
| Growing days | 213 days | 208 days | 223 days | 15 days more | +3.4 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
98 years, 1856 to 1965A day with at least 64.1 mm (2.5 in) of rain is expected about once in 2 years. A day with at least 174.8 mm (6.9 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 64.1 mm (2.5 in) | |
| 5 years | 86.1 mm (3.4 in) | |
| 10 years | 103.3 mm (4.1 in) | |
| 25 years | 128.6 mm (5.1 in) | |
| 50 years | 150.3 mm (5.9 in) | |
| 100 years | 174.8 mm (6.9 in) | Longer than the 98 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, 98 years of values from 1856 to 1965.
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: 162.3 mm (6.4 in) in 1933; 156.0 mm (6.1 in) in 1944; 151.6 mm (6.0 in) in 1928.
Station Changes
1 suspectedOne change was suspected in the annual mean temperature of Washington, at 1929. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1929 ran 0.1 C (0.2 F) higher than in the years before (possible change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1929 | +0.1 | +0.2 | possible | 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 2026-10-17 (17 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2025-12-31).