Siskiyou County, CA: Current UV Index and Hourly Forecast

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As of 12:10 PM PDT on September 13, 2026, out of 21 cities in Siskiyou County, CA in our database, 19 cities (90%) have a UV Index reading of High, while 2 cities (10%) have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Tennant, CA with a reading of 6.1.

Over the next 24 hours, the highest UV Index reading in Siskiyou County, CA is expected to be 6.7 in Tennant between 1:00 PM - 2:00 PM PDT today.

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Current UV Index in Cities in Siskiyou County, CA

• Carrick - 6
• Dorris - 5.7
• Dunsmuir - 6
• Edgewood - 5.8
• Etna - 5.8
• Fort Jones - 5.8
• Gazelle - 5.8
• Greenview - 5.8
• Grenada - 5.6
• Happy Camp - 5
• Hornbrook - 4
• Lake Shastina - 5.8
• Macdoel - 5.8
• McCloud - 6
• Montague - 5.6
• Mount Hebron - 5.8
• Mount Shasta - 6
• Tennant - 6.1
• Tulelake - 5.8
• Weed - 5.8
• Yreka - 5.6