UV index today  UV Index

St. Catharines UV Index Today

Day Summary

The UV index in St. Catharines, Canada Flag of Canada will reach a high of 7 today. This means a high level of sun exposure. See our tips below to stay safe!

Last checked: 2025-08-07

Hourly Forecast Chart

Today's Safety Tips

Be careful! The sun's rays are strong. Try to stay in the shade between 10 a.m. and 4 p.m. Wear a hat, sunglasses, and reapply SPF 30+ sunscreen every 2 hours.

St. Catharines's UV Index

St. Catharines has a UV index that varies throughout the year, reaching its highest levels of around 7 to 8 during summer months and dropping to 1 or 2 in winter. The city sees warmer, sunnier conditions in summer and cold, snowy weather in winter. Spring and fall have mild temperatures and moderate rainfall, with transitions between the two extremes. Compared to nearby cities like Toronto, St. Catharines tends to have slightly milder winters and warmer summers due to its proximity to Lake Ontario. In the wider Great Lakes region, it shares similar seasonal patterns but often experiences more lake-effect snow than areas farther from water.

Hourly UV Index Trend

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

Disclaimer

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