Grant County, WA: Current UV Index and Hourly Forecast

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As of 10:55 AM PST on January 20, 2026, all 25 cities in Grant County, WA in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Moses Lake, WA with a reading of 0.6.

Over the next 24 hours, the highest UV Index reading in Grant County, WA is expected to be 1.1 in Mattawa between 12:00 PM - 1:00 PM PST today.

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Current UV Index in Cities in Grant County, WA

• Banks Lake South - 0.5
• Beverly - 0.6
• Cascade Valley - 0.6
• Coulee City - 0.5
• Crescent Bar - 0.6
• Desert Aire - 0.6
• Electric City - 0.5
• Ephrata - 0.6
• George - 0.6
• Grand Coulee - 0.5
• Hartline - 0.5
• Krupp - 0.5
• Lakeview - 0.5
• Marine View - 0.6
• Mattawa - 0.6
• Moses Lake - 0.6
• Moses Lake North - 0.6
• Quincy - 0.6
• Royal City - 0.6
• Schwana - 0.6
• Soap Lake - 0.5
• Sunland Estates - 0.6
• Warden - 0.6
• Wheeler - 0.6
• Wilson Creek - 0.5