UV Index
UV Index
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Today's UV index in Belfast, United Kingdom 
will be up to 0.4, indicating low risk of harm from the sun's UV rays for the average person. Check our tips for today to make sure you're safe in the sun.
Today, the UV index suggests low sun danger (0-2) in Belfast, reaching up to 0.4. Remember sunglasses and SPF 30+ on sunny days, and be cautious around reflective surfaces like sand, water, and snow for increased UV exposure.
Read more here about the climate and sun exposure in and around Belfast.
Belfast experiences moderate UV (Ultraviolet) index levels throughout the year. In the summer months of June, July, and August, when the weather is generally milder, the UV index ranges from 5 to 6, indicating a moderate risk of harm from unprotected sun exposure. It is important to take precautions like wearing sunscreen, sunglasses, and a hat to protect your skin from the sun's rays.
Belfast has a temperate maritime climate, which means its weather is influenced by the surrounding seas. The city experiences mild winters with average temperatures ranging from 2 °C (36 °F) to 8 °C (46 °F), while summers are cool to mild with temperatures averaging between 12 °C (54 °F) and 19 °C (66 °F). Rainfall is evenly spread throughout the year, so you can expect showers anytime, making waterproof clothing a necessity.
Compared to other cities in its region, Belfast receives less sunlight due to its northern location. This reduced sun exposure means that the city has shorter daylight hours during winter and longer daylight hours through the summer months. Consequently, it is crucial to take advantage of the limited sunshine during winter by getting outdoors when possible and ensuring proper sun protection during the brighter summer days.
The chart above displays the Shortwave Radiation Sum (MJ/m²) for each day of the last year in Belfast. It's designed to provide you with a better understanding of the yearly weather and sun exposure.