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UV Index in Ottawa, CA

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Today's UV index in Ottawa, Canada Canada will be up to 1, indicating low risk of harm from the sun's UV rays for the average person. Check our tips for today to make sure you're safe in the sun.


Today's tips

Today, the UV index suggests low sun danger (0-2) in Ottawa, reaching up to 1. Remember sunglasses and SPF 30+ on sunny days, and be cautious around reflective surfaces like sand, water, and snow for increased UV exposure.

Ottawa Weather

Read more here about the climate and sun exposure in and around Ottawa.

UV Index in Ottawa

The UV index in Ottawa typically ranges from moderate to high levels throughout the year. During the summer months of June to August, the UV index can reach as high as 8 or 9 (very high), which means it is important to protect your skin with sunscreen, hats, and sunglasses. In other seasons, such as spring and autumn, the UV index usually remains between 4 and 6 (moderate to high), making sun protection still necessary.

Weather Seasons

UV index

Ottawa experiences four distinct seasons: spring, summer, autumn, and winter. Spring (March to May) starts off cool with temperatures around 5 °C (41 °F) and gradually becomes milder, reaching an average of 15 °C (59 °F) by May. Summer (June to August) brings warm and sometimes hot weather, with average temperatures ranging from 20 °C to 26 °C (68 °F to 79 °F). Autumn (September to November) cools down gradually, with temperatures ranging from 6 °C to 16 °C (43 °F to 61 °F). Winter (December to February) is cold, with temperatures averaging around -10 °C (14 °F) and occasional dips below -20 °C (-4 °F).

Ottawa's Climate

Compared to other regions, Ottawa experiences a moderate amount of sun exposure. In the summer, it receives around 14 hours of daylight, while in winter, the daylight hours decrease to about 8 hours. This variation in sunlight influences the temperature fluctuations between seasons. Additionally, Ottawa's position in the northeastern region of North America makes it prone to continental climates, characterized by extreme temperatures and varying weather patterns throughout the year.

Annual Sun Radiation

The chart above displays the Shortwave Radiation Sum (MJ/m²) for each day 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.