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UV Index in Ottawa

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Today's UV index in Ottawa, Canada Canada will be up to 6.4, indicating a high level of sun exposure for the average person. Check the annual sun radiation in the city and our tips for today to make sure you're safe in the sun.


Today's tips

With Ottawa's UV index reaching 6.4, protect your skin from harm by staying in shade, wearing protective clothing, and applying SPF 30+ sunscreen every 2 hours between 10 a.m. and 4 p.m., when UV rays are strongest.

Ottawa's UV Index

The UV index in Ottawa, Canada can reach high levels during the summer months, with a maximum index of 9. In the winter, the UV index is much lower, usually staying below 2.

Weather Seasons

UV index

Ottawa has four distinct seasons. Spring brings mild temperatures and blooming flowers, while summer is warm with occasional heatwaves. Autumn sees falling leaves and cooler weather, and winter is cold with snow and ice, often leading to below freezing temperatures.

Ottawa's Climate

Compared to its region and neighboring countries, Ottawa's weather is relatively mild. While nearby cities in northern Canada experience extremely cold winters, Ottawa's winters are moderated by its southern location and proximity to the Great Lakes. Similarly, Ottawa's summers are cooler than many cities in the United States and southern Canada.

Annual Sun Radiation

The chart below displays the average Shortwave Radiation Sum (MJ/m²) for each month of the last year in Ottawa. 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 Ottawa (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.