SOURCE: National Weather Service Portland, Oregon

PORTLAND's
Water Year Precipitation Data

(Period of Record: 1871-1999)
The water year starts on October 1st and ends September 30th.

Water Year
Total
Water Year
Total
Water Year
Total
Water Year
Total
Water Year
Total
1870-71 ---- 1896-97 41.67 1922-23 37.87 1948-49 36.93 1974-75 38.44
1871-72 42.54 1897-98 44.48 1923-24 27.18 1949-50 41.88 1975-76 38.62
1872-73 53.12 1898-99 36.67 1924-25 36.81 1950-51 44.34 1976-77 23.84
1873-74 43.69 1899-00 41.28 1925-26 30.82 1951-52 33.96 1977-78 40.74
1874-75 40.01 1900-01 44.53 1926-27 52.62 1952-53 39.64 1978-79 26.99
1875-76 69.51 1901-02 39.11 1927-28 34.34 1953-54 45.90 1979-80 40.50
1876-77 55.29 1902-03 41.51 1928-29 29.78 1954-55 33.77 1980-81 34.55
1877-78 58.70 1903-04 45.59 1929-30 29.80 1955-56 51.91 1981-82 44.04
1878-79 59.42 1904-05 36.78 1930-31 31.73 1956-57 30.01 1982-83 47.40
1879-80 49.45 1905-06 38.16 1931-32 39.57 1957-58 35.43 1983-84 37.25
1880-81 56.47 1906-07 45.63 1932-33 47.78 1958-59 37.56 1984-85 29.80
1881-82 47.51 1907-08 38.84 1933-34 43.96 1959-60 32.18 1985-86 31.32
1882-83 71.82 1908-09 36.85 1934-35 43.43 1960-61 42.08 1986-87 32.23
1883-84 42.05 1909-10 42.42 1935-36 37.57 1961-62 32.46 1987-88 31.47
1884-85 36.99 1910-11 40.11 1936-37 39.08 1962-63 36.68 1988-89 32.54
1885-86 40.78 1911-12 34.65 1937-38 51.26 1963-64 32.62 1989-90 30.12
1886-87 53.45 1912-13 41.00 1938-39 30.37 1964-65 33.82 1990-91 32.07
1887-88 40.24 1913-14 39.43 1939-40 38.95 1965-66 33.42 1991-92 29.31
1888-89 32.04 1914-15 29.00 1940-41 34.51 1966-67 32.95 1992-93 34.66
1889-90 47.10 1915-16 56.42 1941-42 34.02 1967-68 40.25 1993-94 23.89
1890-91 32.81 1916-17 33.38 1942-43 46.94 1968-69 45.17 1994-95 42.85
1891-92 42.62 1917-18 38.10 1943-44 25.32 1969-70 39.61 1995-96 54.54
1892-93 34.86 1918-19 43.95 1944-45 34.20 1970-71 41.60 1996-97 58.68
1893-94 46.89 1919-20 36.95 1945-46 36.98 1971-72 41.56 1997-98 39.55
1894-95 29.83 1920-21 45.17 1946-47 36.14 1972-73 30.49 1998-99
1895-96 33.71 1921-22 37.60 1947-48 45.63 1973-74 49.98 1999-00
1Precipitation totals are in units of inches.

AVERAGE (1940-1998)...... 37.29 inches
1961-90 NORMAL..... 36.30 inches

Portland I'ntl Airport (1940-1998)
All Portland Locations (1870-1998)
Wettest 5
Driest 5
Wettest 5
Driest 5
58.68 in 1996-97
23.84 in 1976-77
69.51 in 1875-76
23.84 in 1976-77
54.54 in 1995-96
23.89 in 1993-94
59.42 in 1878-79
23.89 in 1993-94
51.91 in 1955-56
25.32 in 1943-44
58.70 in 1877-78
25.32 in 1943-44
49.98 in 1973-74
26.99 in 1977-78
58.58 in 1996-97
26.99 in 1977-78
47.40 in 1982-83
29.31 in 1991-92
56.47 in 1880-81
27.18 in 1923-24