UV index in Lone Mountain Ranch today
Lone Mountain Ranch is a Arizona mountain suburb at 33.8°S. Typical summer peaks of 10–12 (very high to extreme) are no milder for being above the plains. This is warm-temperate America: a long protection season from spring through fall, with clear winter days that can still burn.
Live reading · data by Open-Meteo · reference monitoring by ARPANSA
Today and tomorrow in Lone Mountain Ranch
Peak UV, temperature and conditions for Lone Mountain Ranch. Tomorrow’s peak is the number to plan around if you’re heading out in the middle of the day.
Weather conditions right now
Cloud and rain cut heat more than they cut UV. A partly cloudy high-country day in Lone Mountain Ranch can still sit at protection levels. Why you burn on cloudy days.
When Lone Mountain Ranch needs sun protection
Sun protection is needed in Lone Mountain Ranch typically from April through October, and any other day UV reaches 3. Altitude lets more UV through; a cool lookout is still protection weather when the index is 3 or above.
The threshold, per SunSmart and ARPANSA: whenever UV reaches 3 or above, Slip on covering clothing, Slop on SPF 50+ sunscreen, Slap on a hat, Seek shade and Slide on sunglasses. Read the full sun safety guide.
The UV scale at a glance
- 0–2Low
- 3–5Moderate
- 6–7High
- 8–10Very high
- 11+Extreme
Frequently asked questions
- When does Lone Mountain Ranch need sun protection?
- Whenever the UV index is 3 or above. In Lone Mountain Ranch that is typically from April through October, and any other day UV reaches 3. The EPA Sun Safety action steps apply at the same threshold used worldwide.
- Does Lone Mountain Ranch need sun protection in winter?
- Not every day. Midwinter middays in Lone Mountain Ranch often sit below UV 3, but clear late-winter and early-spring days cross the threshold before summer fully arrives. Check the live index.
- Can you burn on a cool day in Lone Mountain Ranch?
- Yes. UV is not heat. A cool, windy or lightly cloudy day in Lone Mountain Ranch can still sit at UV 3 or above, especially from spring through autumn. Temperature on this page is for context only; the UV number is what decides protection.