Waterloo UV Index Today
- Current UV Index0.0
- Cloud Cover00%
- Temperature00.0 ℃
Day Summary
- Max UV Index5.1
- Avg Clouds87%
- Max Temp20.4 ℃
- Peak UV at 1 PM
- Protection Required ☀️
The UV index in Waterloo, Canada 
will reach a high of 5.1 today. This means a moderate level of sun exposure. See our tips below to stay safe!
Last checked: 2025-09-24
Hourly Forecast Chart
Today's Safety Tips
The sun is a bit strong. Find some shade during midday. Wear a hat, sunglasses, and use SPF 30+ sunscreen if you'll be outside for a while.
Waterloo's UV Index
Waterloo, Canada, has a UV index that varies throughout the year. It is lowest in winter, often between 0 and 1, and highest in summer, reaching around 6 to 7 during sunny days.
Weather Seasons
The weather in Waterloo changes with the seasons. Winters are cold and snowy, with temperatures often below freezing. Summers are warm and sometimes humid, while spring and fall are mild with occasional rain.
Waterloo's Climate
Compared to other parts of Ontario and nearby regions, Waterloo experiences similar seasonal weather but slightly colder winters than southern cities like Toronto. Neighboring areas such as Kitchener share almost identical weather patterns.
Hourly UV Index Trend
See the UV index hour by hour for Waterloo. When the level is high, it's smart to find some shade.
- Loading hourly data...