UV Index
UV Index
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Today's UV index in Hamilton, Canada 
will be up to 1.4, 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 Hamilton, reaching up to 1.4. 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 Hamilton.
The UV index in Hamilton, Canada ranges from low to very high throughout the year. In the summer months, the UV index can reach 7 or 8 (very high), meaning that unprotected skin can burn in just 10-15 minutes. It is crucial to wear sunscreen, protective clothing, and sunglasses to minimize the risk of sunburn and skin damage.
Hamilton experiences four distinct seasons: spring, summer, autumn, and winter. Spring brings mild temperatures, with highs ranging from 10-20 °C (50-68 °F), and occasional rainfall. Summers are warm, with average highs of 25-30 °C (77-86 °F), and can occasionally reach 35 °C (95 °F) or higher. Autumn brings cooler temperatures, ranging from 10-20 °C (50-68 °F), with colorful foliage. Winters, on the other hand, can be cold and snowy, with temperatures averaging between -10 °C to -5 °C (14-23 °F).
Compared to its region, Hamilton experiences a moderate level of sun exposure. Located in southern Ontario, it receives around 2,000 hours of sunshine per year. This is slightly less than some other areas in the region, such as Niagara Falls or Toronto, but more than cities further north. Despite the moderate sun exposure, it is still important to take precautions against harmful UV rays, especially during the summer months when the UV index is higher.
The chart above displays the Shortwave Radiation Sum (MJ/m²) for each day of the last year in Hamilton. It's designed to provide you with a better understanding of the yearly weather and sun exposure.