UV Index Today in Whatcom County, Washington (WA)
Sunday, September 20, 2026 -9:22 AM PDT (GMT-7)
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The average maximum UV Index today across 15 locations in Whatcom County, Washington (WA), is 4.3. The highest projected maximum is 4.6 in Sudden Valley at 1:00 PM PDT, while the lowest projected maximum is 4.2 in Lynden at 1:00 PM PDT.
Tomorrow, the average maximum UV Index across those same locations is expected to be 4.1. The highest projected maximum is 4.3 in Sudden Valley at 1:00 PM PDT, and the lowest projected maximum is 4 in Birch Bay at 1:00 PM PDT.
15 Places in Whatcom County, Washington (WA)
Maximum UV Index Today