| Climate of Portland, OR - :6425 | National Weather Service (NWS)
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Climate of Portland, OR
  • Published Date:
    1996
Filetype[PDF - 6.51 MB]


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Climate of Portland, OR
Details:
  • Personal Authors:
  • Corporate Authors:
    United States, National Weather Service., Western Region,
  • Description:
    "Portland is situated about 65 miles inland from the Pacific Ocean and midway between the northerly oriented low coast range on the west and the higher Cascade range on the east, each about 30 miles distant. The coast range provides limited shielding from the Pacific Ocean. The Cascades provide a steep slope for orographic lift of moisture-laden westerly winds and consequent moderate rainfall. The Cascades also act as a barrier, preventing the colder continental air masses originating in Canada from penetrating western Oregon. Airflow is usually northwesterly in Portland during the spring and summer and southeasterly in the fall and winter. The Portland airport location is drier than most surrounding locations"--Page 1.

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