Frederick County, MD: Current UV Index and Hourly Forecast

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As of 12:19 PM EDT on September 12, 2025, all 27 cities in Frederick County, MD in our database have a UV Index reading of High. The city with the highest UV Index reading right now is Green Valley, MD with a reading of 5.9.

Over the next 24 hours, the highest UV Index reading in Frederick County, MD is expected to be 6.6 in Green Valley between 1:00 PM - 2:00 PM EDT today.

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Current UV Index in Cities in Frederick County, MD

• Adamstown - 5.8
• Ballenger Creek - 5.8
• Bartonsville - 5.8
• Braddock Heights - 5.8
• Brunswick - 5.8
• Buckeystown - 5.8
• Burkittsville - 5.8
• Emmitsburg - 5.7
• Frederick - 5.8
• Graceham - 5.8
• Green Valley - 5.9
• Jefferson - 5.8
• Lewistown - 5.8
• Libertytown - 5.8
• Linganore - 5.8
• Middletown - 5.8
• Monrovia - 5.9
• Myersville - 5.8
• New Market - 5.8
• Point of Rocks - 5.8
• Rosemont - 5.8
• Sabillasville - 5.8
• Spring Ridge - 5.8
• Thurmont - 5.8
• Urbana - 5.9
• Walkersville - 5.8
• Woodsboro - 5.8