UV Index Today in Phoenix, Arizona

Current UV
Today's Max
Current Time
Location Phoenix, AZ

Hourly UV Index Chart

low moderate high very high extreme

Safe Exposure Time

Estimated based on the Fitzpatrick scale for skin color and a UV Index of

Skin Type I
Very fair skin, always burns, never tans
Time until burn:
Time until burn with SPF 15*:
Time until burn with SPF 30*:

*Estimate assumes proper application of broad spectrum sunscreen with reapplication every 2 hours.

Important Safety Information

General Guidelines

These exposure times are estimates based on scientific research and should be used as general guidelines only. Individual responses to UV exposure may vary.

Affecting Factors

UV exposure is affected by: time of day, season, altitude, cloud cover, reflection from surfaces, and individual skin sensitivity.

Protection Tips

For proper sun protection: seek shade during peak UV hours (10 AM - 4 PM), wear protective clothing, use broad-spectrum sunscreen, and monitor the UV index regularly.

Medical Advice

Consult with a healthcare provider for personalized sun protection advice, especially if you have a history of skin conditions or are taking medications that may increase sun sensitivity.

SUNSET & SUNRISE

Phoenix's UV Climate

Phoenix, located in the Sonoran Desert of central Arizona, experiences an extremely arid climate with some of the highest UV exposure levels in the United States. The city's desert location, high elevation, and clear skies result in intense UV radiation throughout most of the year. The combination of extremely hot temperatures, minimal cloud cover, and outdoor activities makes comprehensive sun protection critical for residents and visitors, particularly during the scorching summer months.

Average Annual UV Index

9.1

Peak UV Season

April - September

Sunny Days per Year

330

Practical Tips for Outdoor Activities

Make the most of outdoor activities while staying safe in Maricopa County:

UV and Weather in Maricopa County

Learn about Maricopa County's unique climate patterns, UV radiation levels, and how they affect your daily life. Enter your zip code for location-specific weather radar data and UV forecasts to help you make informed decisions about outdoor activities and sun protection.

Climate and UV Patterns

Phoenix's desert climate creates extreme UV exposure conditions with very high to extreme UV levels for most of the year. The city receives intense UV radiation due to its high elevation, clear skies, and southern latitude, with UV index values frequently reaching 11+ during peak hours. Local weather radar shows minimal cloud cover throughout the year, meaning residents face maximum UV exposure. The arid conditions can also create a false sense of comfort, as UV rays are most intense in dry, clear conditions.

UV Index and Health Impact

Understanding UV radiation levels is crucial for protecting your health. The UV index in Maricopa County varies throughout the year:

  • Summer (April-September): High to Very High UV (7-10+)
  • Spring/Fall: Moderate to High UV (5-7)
  • Winter: Moderate UV (4-6)
  • Peak UV hours: 10 AM - 4 PM
  • Cloudy conditions: UV reduced by 20-40%
  • Clear skies: Maximum UV exposure
  • Visibility conditions affect UV intensity

Local Weather Patterns

Phoenix's weather patterns create unique UV exposure challenges throughout the year. The city experiences extremely hot summers with clear skies and minimal precipitation, resulting in maximum UV exposure. During the monsoon season (July to September), afternoon thunderstorms can temporarily reduce UV levels, but morning and early afternoon hours still present extreme exposure risk. The city's high elevation and desert location mean UV radiation is more intense than at sea level. Winter months bring cooler temperatures but still feature high UV levels due to clear skies and southern latitude.