UV Index Today in Washington, District of Columbia
Washington's UV Climate
Washington, DC, the nation's capital, experiences a humid subtropical climate with moderate to high UV exposure during the summer months. The city's mid-Atlantic location brings variable weather, but clear summer days can result in high UV index values. Sun protection is important for outdoor activities, especially during peak hours.
Average Annual UV Index
6.7
Peak UV Season
May - September
Sunny Days per Year
203
Typical UV Index by Season in Washington
| Season | Typical Midday UV | Protection Needed |
|---|---|---|
| Summer | High to Very High (7-9) | SPF 30+, hat, sunglasses; shade from 10 AM – 4 PM |
| Spring & Fall | Moderate to High (4-6) | SPF 30+ for extended time outdoors |
| Winter | Low to Moderate (2-3) | Sunscreen for long midday exposure; more on snow |
UV Index in Nearby Cities
- UV Index in Philadelphia, PA123 mi away
- UV Index in New York, NY204 mi away
- UV Index in Raleigh, NC233 mi away
- UV Index in Columbus, OH326 mi away
Practical Tips for Outdoor Activities
Make the most of outdoor activities while staying safe in District of Columbia County:
- Check UV index and weather radar before planning outdoor activities
- Schedule outdoor activities during low UV hours
- Use appropriate sun protection based on UV levels
- Stay hydrated during outdoor activities
- Take regular breaks in shaded areas
- Monitor weather conditions for changes
- Be prepared for sudden weather changes
- Know the signs of heat-related illness
- Wear a hat and protective clothing
- Check visibility conditions before outdoor plans
- Stay alert to weather alerts and warnings
UV and Weather in District of Columbia County
Learn about District of Columbia 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
Washington's climate features cold winters and hot, humid summers. UV index values are highest from late spring through early fall, with peak values reaching 8-9 on clear days. Cloud cover is common, but when skies are clear, UV radiation can be intense.
UV Index and Health Impact
Understanding UV radiation levels is crucial for protecting your health. Typical clear-day UV index values in Washington through the year:
- Summer: High to Very High (7-9)
- Spring/Fall: Moderate to High (4-6)
- Winter: Low to Moderate (2-3)
- Peak UV hours: 10 AM - 4 PM
- Cloud cover can reduce UV by 20-40%, but does not eliminate it
- Clear skies bring maximum UV exposure
Local Weather Patterns
Washington's weather is variable, with frequent changes in cloud cover and temperature. Summer brings the highest UV exposure, especially during midday hours. Residents and visitors should use sun protection during outdoor activities, particularly in parks and at outdoor events.
Frequently Asked Questions About UV in Washington
What is the UV index in Washington today?
The live UV index for Washington, DC is shown at the top of this page and updates throughout the day, along with today's maximum and an hourly forecast.
When is the sun strongest in Washington?
UV radiation is strongest between 10 AM and 4 PM. Washington's peak UV season runs May - September, when the midday index typically reaches High to Very High (7-9).
How high does the UV index get in Washington?
Summer days in Washington typically reach High to Very High (7-9). Spring and fall usually bring Moderate to High (4-6), while winter values are typically Low to Moderate (2-3).
Do I need sunscreen in Washington during winter?
Winter UV in Washington is usually low, so sunburn risk is limited on typical days. Sunscreen is still wise during midday hours or around reflective snow.
How sunny is Washington compared to other cities?
Washington averages about 203 sunny days per year with an average annual UV index around 6.7.