Washington County, OR: Current UV Index and Hourly Forecast

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As of 3:36 PM PDT on September 30, 2026, all 27 cities in Washington County, OR in our database have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Sherwood, OR with a reading of 3.3.

Over the next 24 hours, the highest UV Index reading in Washington County, OR is expected to be 4 in Hillsboro between 1:00 PM - 2:00 PM PDT tomorrow.

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Current UV Index in Cities in Washington County, OR

• Aloha - 3.2
• Banks - 3.1
• Beaverton - 3.2
• Bethany - 3.2
• Bull Mountain - 3.2
• Cedar Hills - 3.2
• Cedar Mill - 3.2
• Cherry Grove - 2.6
• Cornelius - 3.1
• Dilley - 3.1
• Durham - 3.2
• Forest Grove - 3.1
• Garden Home-Whitford - 3.2
• Gaston - 2.6
• Hillsboro - 3.1
• King City - 3.2
• Marlene Village - 3.2
• Metzger - 3.2
• North Plains - 3.1
• Oak Hills - 3.2
• Raleigh Hills - 3.2
• Rockcreek - 3.1
• Sherwood - 3.3
• Tigard - 3.2
• Tualatin - 3.2
• West Haven-Sylvan - 3.2
• West Slope - 3.2