Dewey County, SD: Current UV Index and Hourly Forecast

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As of 12:25 AM MDT on July 4, 2026, all 8 cities in Dewey County, SD in our database have a UV Index reading of 0, indicating no radiation from the sun.

Over the next 24 hours, the highest UV Index reading in Dewey County, SD is expected to be 8.1 in Lantry between 1:00 PM - 2:00 PM MDT today.

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Current UV Index in Cities in Dewey County, SD

• Green Grass - 0
• Isabel - 0
• La Plant - 0
• Lantry - 0
• North Eagle Butte - 0
• Swift Bird - 0
• Timber Lake - 0
• Whitehorse - 0