UV Index
UV Index
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Today's UV index in St. Catharines, Canada 
will be up to 4.6, 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.
With a UV index reaching up to 4.6 in St. Catharines, 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.
The UV index in St. Catharines, Canada, can reach high levels during the summer months, with a peak in July. It is important to be aware of the UV index and take necessary precautions to protect yourself from harmful UV rays.
St. Catharines experiences four distinct seasons: a cold and snowy winter, a mild and wet spring, a warm and humid summer, and a cool and crisp fall. Each season offers its own unique activities and attractions, making St. Catharines a great place to visit year-round.
Compared to its region and neighboring countries, St. Catharines has a more moderate climate. While nearby cities like Toronto and Buffalo can experience extreme temperature fluctuations, St. Catharines' proximity to Lake Ontario helps to regulate its temperature, resulting in more mild weather conditions.
The chart below displays the average Shortwave Radiation Sum (MJ/m²) for each month of the last year in St. Catharines. It's designed to provide you with a better understanding of the yearly weather and sun exposure.