Jefferson County, MO: Current UV Index and Hourly Forecast

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As of 2:37 PM CDT on April 1, 2025, out of 25 cities in Jefferson County, MO in our database, 16 cities (64%) have a UV Index reading of High, while 9 cities (36%) have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Cedar Hill, MO with a reading of 5.8.

Over the next 24 hours, the highest UV Index reading in Jefferson County, MO is expected to be 5.8 in Cedar Hill between 2:00 PM - 3:00 PM CDT today.

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Current UV Index in Cities in Jefferson County, MO

• Arnold - 4.9
• Barnhart - 5.5
• Briarwood Estates - 5.5
• Byrnes Mill - 5.2
• Cedar Hill - 5.8
• Cedar Hill Lakes - 5.8
• Crystal City - 5.5
• De Soto - 5.5
• Festus - 5.5
• Herculaneum - 5.5
• High Ridge - 5.2
• Hillsboro - 5.5
• Horine - 5.5
• Imperial - 5.1
• Kimmswick - 5.1
• LaBarque Creek - 5.6
• Lake Tekakwitha - 5.6
• Murphy - 5.2
• Olympian Village - 5.5
• Parkdale - 5.2
• Peaceful Village - 5.2
• Pevely - 5.5
• Raintree Plantation - 5.5
• Scotsdale - 5.2
• Summer Set - 5.8