UV index in Derry Downs today
Inland Derry Downs (ENG) is at 51.4°N. Without sea haze, July UV commonly runs 8–10 (very high), and a cool morning is no reason to skip sunscreen. This is cool-temperate Britain: summer UV still climbs into the very high band, and spring arrives before the weather feels hot.
Live reading · data by Open-Meteo · reference monitoring by ARPANSA
Today and tomorrow in Derry Downs
Peak UV, temperature and conditions for Derry Downs. 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 day in Derry Downs can still sit at protection levels. Why you burn on cloudy days.
When Derry Downs needs sun protection
Sun protection is needed in Derry Downs typically from May through September, and any clear spring or fall day UV reaches 3. Inland heat or a cool change does not change the UV index; go by the number, not how the day feels.
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 Derry Downs need sun protection?
- Whenever the UV index is 3 or above. In Derry Downs that is typically from May through September, and any clear spring or fall day UV reaches 3. The UK Health Security Agency and WHO use the same UV Index scale worldwide.
- Does Derry Downs need sun protection in winter?
- Not every day. Midwinter middays in Derry Downs 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 Derry Downs?
- Yes. UV is not heat. A cool, windy or lightly cloudy day in Derry Downs 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.