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Saint Catharines UV Index Today

Day Summary

The UV index in Saint Catharines, Canada Flag of Canada will reach a high of 8 today. This means a veryhigh level of sun exposure. See our tips below to stay safe!

Last checked: 2025-08-01

Hourly Forecast Chart

Today's Safety Tips

The risk is very high. It's best to stay out of the sun between 10 a.m. and 4 p.m. If you must be outside, wear protective clothing and apply sunscreen often.

Saint Catharines's UV Index

The UV index in Saint Catharines varies throughout the year, typically higher in summer months, reaching levels around 6 to 8, indicating moderate to high ultraviolet radiation. In winter, the UV index often drops below 2, showing low exposure.

Weather Seasons

UV index

Saint Catharines experiences four distinct seasons: cold snowy winters, warm and humid summers, mild springs, and cool autumns. Summers can be hot with temperatures often above 25°C, while winters frequently dip below freezing, bringing snow and ice.

Saint Catharines's Climate

Compared to other parts of Canada, Saint Catharines generally has milder winters due to its location near the Great Lakes. It is warmer and less snowy than northern regions but experiences cooler temperatures than southern U.S. cities. Its climate is similar to nearby cities like Toronto and Hamilton.

Hourly UV Index Trend

See the UV index hour by hour for Saint Catharines. When the level is high, it's smart to find some shade.

Disclaimer

* The information on this page about the UV index in Saint Catharines is for educational purposes only. It is not a substitute for professional medical advice. Always consult a doctor for any health concerns.