Columbia County, OR: Current UV Index and Hourly Forecast

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As of 9:42 AM PDT on October 31, 2026, all 9 cities in Columbia County, OR in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is St. Helens, OR with a reading of 0.1.

Over the next 24 hours, the highest UV Index reading in Columbia County, OR is expected to be 1.5 in St. Helens between 1:00 PM - 2:00 PM PDT today.

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Current UV Index in Cities in Columbia County, OR

• Clatskanie - 0.1
• Columbia City - 0.1
• Deer Island - 0.1
• Prescott - 0.1
• Rainier - 0.1
• Scappoose - 0.1
• St. Helens - 0.1
• Vernonia - 0.1
• Warren - 0.1