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Eastern Oregon Weather Trivia
1885-1995
(based on percent of average water year precipitation)

Driest Year Wettest Year Driest Decade Wettest
Decade
Most Consecutive Years
Below Average Above Average
Eastern Oregon (all) 1977
(62%)
1894
(149%)
1928-37
(80%)
1978-87
(114%)
10
1928-37
(80%)
8
1890-97
(118%)
Hood  River Watershed 1977
(44%)
1894
(203%)
1926-35
(84%)
1892-1901 (138%) 9
1929-37
(82%)
13
1892-1904
(132%)
Deschutes River Watershed 1955
(55%)
1894
(197%)
1928-37
(80%)
1892-1901 (130%) 10
1928-37
(80%)
10
1892-1901
(130%)
John Day River Watershed 1973
(67%)
1894 (180%) 1928-37
(84%)
1892-1901
(118%)
10
1928-37
(84%)
6
1892-97
(125%)
Unatilla & Walla Walla Rivers Watershed 1977
(67%)
1894
(175%)
1928-37
(84%)
1885-94
(118%)
10
1928-37
(84%)
8
1890-97
(119%)
Powder River Watershed 1919 & 1966
(62%)
1894
(158%)
1930-39
(82%)
1975-84
(114%)
9
1929-37
(80%)
5
1912-16 (111%)
1980-84 (127%)
Malheur River Watershed 1939 & 1966
(57%)
1904
(156%)
1928-37
(77%)
1978-87
(117%)
16
1922-37
(79%)
7
1978-84
(129%)
Owyhee River Watershed 1924
(52%)
1904
162%)
1926-35
(73%)
1975-84
(114%)
16
1922-37
(74%)
4
1940-43 (115%)
1969-72 (107%)
Malheur Lake Watershed 1924
(47%)
1907
(163%)
1928-37
(76%)
1978-87
(117%)
10
1928-37
(76%)
7
1978-84
(126%)
Goose & Summer Lakes Watershed 1931
(43%)
1907
(179%)
1928-37
(73%)
1904-13
(120%)
10
1928-37
(73%)
6
1899-1904
(115%)
Klamath Watershed 1926
(50%)
1907
(178%)
1928-37
(80%)
1904-13
(120%)
8
1928-34
(76%)
8
1890-97
(76%)