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UV Index in Belfast

UV index


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Today's UV index in Belfast, United Kingdom United Kingdom will be up to 4, indicating a moderate level of sun exposure for the average person. Check the annual sun radiation in the city and our tips for today to make sure you're safe in the sun.


Today's tips

With a UV index reaching up to 4 in Belfast, stay shaded during midday when the sun is strongest; wear protective clothing, a wide-brimmed hat, UV-blocking sunglasses; apply SPF 30+ sunscreen every 2 hours, even on cloudy days; and be cautious of heightened UV on bright surfaces.

Belfast's UV Index

The UV index in Belfast, UK, is generally low due to its northern location. On average, the UV index reaches 4.5 in the summer months and rarely exceeds 6.

Weather Seasons

UV index

Belfast experiences four distinct seasons. Spring (March to May) is mild and wet, with temperatures ranging from 7°C to 14°C. Summers (June to August) are cool and damp, with temperatures rarely exceeding 20°C. Autumn (September to November) is often mild and wet, while winters (December to February) are cold and damp, with temperatures occasionally dropping below freezing.

Belfast's Climate

Compared to its region and neighboring countries, Belfast's weather is milder than continental Europe's and colder than southern UK and Ireland. Its proximity to the Atlantic Ocean results in a milder climate, with less extreme temperatures than inland areas. Rainfall is moderate and evenly distributed throughout the year, making Belfast wetter than its neighbors to the south.

Annual Sun Radiation

The chart below displays the average Shortwave Radiation Sum (MJ/m²) for each month of the last year in Belfast. It's designed to provide you with a better understanding of the yearly weather and sun exposure.


* This page's content about the UV index in Belfast (United Kingdom) is for educational and informational purposes only. The developers and data providers are not liable for the accuracy, reliability, or availability of the information. The information is not a substitute for professional medical advice, and the developers and data providers are not medical professionals. Seek advice from a qualified health provider for any medical concerns, and do not disregard medical advice or delay seeking it based on the information provided on this site.