Collin County, TX: Current UV Index and Hourly Forecast

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As of 3:21 PM CDT on August 8, 2026, out of 25 cities in Collin County, TX in our database, 16 cities (64%) have a UV Index reading of Very High, 8 cities (32%) have a UV Index reading of High, while 1 city (4%) have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Plano, TX with a reading of 8.4.

Over the next 24 hours, the highest UV Index reading in Collin County, TX is expected to be 10 in Plano between 1:00 PM - 2:00 PM CDT tomorrow.

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Current UV Index in Cities in Collin County, TX

• Allen - 8.4
• Anna - 6.4
• Blue Ridge - 6.4
• Celina - 8.2
• Fairview - 6.4
• Farmersville - 3.6
• Frisco - 8.2
• Josephine - 7.5
• Lavon - 8
• Lowry Crossing - 6.4
• Lucas - 8
• McKinney - 8.2
• Melissa - 6.4
• Murphy - 8
• Nevada - 8
• New Hope - 6.4
• Parker - 8
• Plano - 8.4
• Princeton - 6.4
• Prosper - 8.2
• Seis Lagos - 8
• St. Paul - 8
• Westminster - 6.4
• Weston - 8.2
• Wylie - 8