UV Index Today in Reno, Nevada
Reno's UV Climate
Reno sits at 4,500 feet in the high desert east of the Sierra Nevada, and like other high-altitude cities its UV runs well above what its latitude alone would produce. The Truckee River corridor, Lake Tahoe forty minutes up the hill, and 250 sunny days a year make this an outdoor town in every season — and Tahoe's combination of 6,200-foot elevation, snowfields, and water reflection creates some of the strongest incidental UV exposure in the country for Reno's weekend crowd.
Average Annual UV Index
7.0
Peak UV Season
April - September
Sunny Days per Year
252
Typical UV Index by Season in Reno
| Season | Typical Midday UV | Protection Needed |
|---|---|---|
| Summer | Very High (9-10) | SPF 30+, hat, sunglasses; shade from 10 AM – 4 PM |
| Spring & Fall | Moderate to High (5-8) | SPF 30+ for extended time outdoors |
| Winter | Low to Moderate (2-4) | Sunscreen for long midday exposure; more on snow |
UV Index in Nearby Cities
- UV Index in San Francisco, CA186 mi away
- UV Index in San Jose, CA188 mi away
- UV Index in Santa Clara, CA190 mi away
- UV Index in Palo Alto, CA191 mi away
Practical Tips for Outdoor Activities
Make the most of outdoor activities while staying safe in Washoe 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 Washoe County
Learn about Washoe 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
Reno's semi-arid high-desert climate pairs altitude-boosted UV with exceptional atmospheric clarity: summer midday values reach 9-10, roughly 20% above sea-level equivalents. The Sierra rain shadow keeps skies dry and cloudless for long stretches. Winter valley UV is modest, but the nearby ski elevations flip that calculus completely — spring skiing at Tahoe resorts combines high sun angles, altitude, and snow reflection into peak-summer-grade exposure.
UV Index and Health Impact
Understanding UV radiation levels is crucial for protecting your health. Typical clear-day UV index values in Reno through the year:
- Summer: Very High (9-10)
- Spring/Fall: Moderate to High (5-8)
- Winter: Low to Moderate (2-4)
- 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
Summers are hot, dry, and dependably clear, with river floaters and Tahoe beachgoers adding water reflection to already-elevated UV. Occasional late-summer wildfire smoke can dull the sun for days at a time. Winter storms alternate with brilliant post-frontal spells; on those bluebird days, skiers and snowboarders above 7,000 feet face effective UV several times the valley reading, and goggle tans are the visible proof.
Frequently Asked Questions About UV in Reno
What is the UV index in Reno today?
The live UV index for Reno, NV 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 Reno?
UV radiation is strongest between 10 AM and 4 PM. Reno's peak UV season runs April - September, when the midday index typically reaches Very High (9-10).
How high does the UV index get in Reno?
Summer days in Reno typically reach Very High (9-10). Spring and fall usually bring Moderate to High (5-8), while winter values are typically Low to Moderate (2-4).
Do I need sunscreen in Reno during winter?
In town, winter UV is modest; at Tahoe elevations, snow reflection makes sunscreen and UV-blocking goggles essential on sunny days.
How sunny is Reno compared to other cities?
Reno averages about 252 sunny days per year with an average annual UV index around 7.0.