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UV Index in St. Catharines, CA

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Today's UV index in St. Catharines, Canada Canada will be up to 1.5, 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's tips

Today, the UV index suggests low sun danger (0-2) in St. Catharines, reaching up to 1.5. Remember sunglasses and SPF 30+ on sunny days, and be cautious around reflective surfaces like sand, water, and snow for increased UV exposure.

St. Catharines Weather

Read more here about the climate and sun exposure in and around St. Catharines.

UV Index in St. Catharines

St. Catharines, Canada experiences varying levels of UV (Ultraviolet) radiation throughout the year. During summer (June to August), the UV index can reach high levels, averaging around 7 (27). This indicates a moderate to high risk of sunburn, so it is important to protect your skin with sunscreen, hats, and sunglasses.

Weather Seasons

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St. Catharines has four distinct seasons: spring (March to May), summer (June to August), fall (September to November), and winter (December to February). Spring brings cool temperatures, with highs of around 12-15 °C (54-59 °F) and occasional rain showers. Summer is warm and humid, with average highs of 26-29 °C (79-84 °F) and occasional thunderstorms. Fall brings cooler temperatures between 15-20 °C (59-68 °F), along with colorful foliage. Winter temperatures can drop below freezing, with average highs ranging from -2 to 2 °C (28-36 °F) and snowfall.

St. Catharines's Climate

Compared to its region, St. Catharines enjoys a moderate climate due to its proximity to Lake Ontario. The lake acts as a natural moderator, keeping temperatures cooler in the summer and warmer in the winter compared to inland areas. However, the region still experiences sun exposure throughout the year, so it is important for residents and visitors to be mindful of UV levels and take appropriate precautions to protect their skin.

Annual Sun Radiation

The chart above displays the Shortwave Radiation Sum (MJ/m²) for each day of the last year in St. Catharines. 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 St. Catharines (Canada) 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.