Mourne Beg UV Index
Derry and Strabane — Sun Safety & UV Levels
Mourne Beg UV Outlook
For Mourne Beg today, UV exposure looks moderate. Fair-skinned individuals may wish to apply sunscreen.
The longer-range UV signal for Mourne Beg points to moderate levels for most days. At times of year when the sun is higher, UV can rise quickly on clearer days.
Current UV
Fair-skinned individuals may wish to apply sunscreen.
☀️ UV Scale
| 0–2 | Low | Minimal UV risk today; sun protection generally not required. |
| 3–5 | Moderate | UV levels are moderate — consider sunscreen if spending extended time outdoors. This is the guidance for Mourne Beg today. |
| 6–7 | High | UV levels are high — sunscreen, a hat, and sunglasses recommended. |
| 8–10 | Very High | UV levels are very high — take full precautions when outdoors. |
| 11+ | Extreme | Exceptionally high UV; minimise time in direct sun during peak hours. |
Today’s Hourly UV
14-Day UV Forecast
UV Trend
Forecast context and reference links
Across Northern Ireland, local effects can shift outcomes even when the national pattern is similar. Coastal exposure, terrain, and airflow direction often explain the difference between a near-miss and a wet day.
- Northern Ireland Climate for regional patterns and seasonal tendencies.
- UK Climate Overview for a national baseline and how regions compare.
- Northern Ireland for location browsing and regional navigation.
How to interpret confidence
For how forecast reliability changes with lead time, see Forecast Confidence. For transparency on how WeatherEngland sources and updates data, see Methodology.
Background guides
- UK Weather Patterns
- UK Seasonal Weather
- UK Weather Hazards
- UK Weather Safety
- UK Jet Stream
- UK Microclimates
Glossary support
Start with the Weather Glossary. Useful terms for this page include UV Index, Solar Radiation, and Cloud.
FAQ
What is the UV index in Mourne Beg today?
Today in Mourne Beg, UV levels are moderate and sits near 4 at its peak. Ultraviolet intensity is controlled mainly by the height of the sun, cloud cover and air clarity.
When is UV strongest in Mourne Beg?
UV in Mourne Beg is strongest around the middle of the day, when the sun reaches its highest point. Levels are also highest in late spring and summer, when the sun is higher in the sky across the UK.
Can UV be high when it’s cloudy in Mourne Beg?
Yes — cloud is not a guarantee of low UV. Cloud doesn’t always block UV effectively — especially with patchy cloud and brighter summer light. This is most relevant in summer and around the middle of the day.
What does the UV index number mean for sun safety?
The number indicates how quickly unprotected skin may be affected in sunlight. A higher index indicates faster potential skin damage in sunshine; sensible protection becomes more worthwhile as values increase.
Does UV in Mourne Beg change a lot day to day?
It can. Day-to-day swings are mainly driven by cloud patterns, haze and air mass changes, while seasonal shifts are slower and follow the sun’s height through the year.