Grant County, WA: Current UV Index and Hourly Forecast

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As of 1:08 PM PDT on July 19, 2025, all 25 cities in Grant County, WA in our database have a UV Index reading of Very High. The city with the highest UV Index reading right now is Mattawa, WA with a reading of 8.1.

Over the next 24 hours, the highest UV Index reading in Grant County, WA is expected to be 8.1 in Mattawa between 1:00 PM - 2:00 PM PDT today.

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Current UV Index in Cities in Grant County, WA

• Banks Lake South - 7.8
• Beverly - 8.1
• Cascade Valley - 7.8
• Coulee City - 7.5
• Crescent Bar - 7.9
• Desert Aire - 8.1
• Electric City - 7.7
• Ephrata - 7.8
• George - 8
• Grand Coulee - 7.7
• Hartline - 7.9
• Krupp - 7.6
• Lakeview - 7.6
• Marine View - 8
• Mattawa - 8.1
• Moses Lake - 7.8
• Moses Lake North - 7.8
• Quincy - 7.9
• Royal City - 8
• Schwana - 8.1
• Soap Lake - 7.6
• Sunland Estates - 8
• Warden - 8
• Wheeler - 7.8
• Wilson Creek - 7.6