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UV Index in Hamilton

Day Summary

Today's UV index in Hamilton, Canada Canada will be up to 7.4, indicating a high level of sun exposure for the average person. Check our tips for today to make sure you're safe in the sun.

Last checked: 2025-05-09

Forecast

Today's tips

With Hamilton's UV index reaching 7.4, protect your skin from harm by staying in shade, wearing protective clothing, and applying SPF 30+ sunscreen every 2 hours, especially between 10 a.m. and 4 p.m. when UV rays are strongest.

Hamilton's UV Index

Hamilton's UV index varies seasonally, reaching moderate to high levels during summer months and staying low during fall and winter. The peak UV index typically occurs in June and July.

Weather Seasons

UV index

Hamilton experiences four distinct seasons: cold, snowy winters; warm, humid summers; and mild springs and falls with variable rainfall. Snowfall is common from December to March, while summer temperatures often range from 20 to 30°C (68 to 86°F).

Hamilton's Climate

Compared to the wider Ontario region, Hamilton has a slightly milder climate due to its location near Lake Ontario, which moderates temperatures. Neighboring cities like Toronto have similar weather but may experience slightly warmer summers and colder winters.

Hourly Trend

See the UV index hour by hour for Hamilton, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.

Disclaimer

* This page's content about the UV index in Hamilton (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.