UV Index in Ontario, United States

Hourly UV Index in Ontario

As the sun rises, the UV Index starts its ascent, with a gentle 1 at 07:00. By 08:00, it begins to climb, reaching 2, signaling a reminder to take care. The real intensity kicks in at 10:00, where the index peaks at 6, escalating to a scorching 9 by noon. The hottest moment arrives at 13:00, showcasing a dramatic 10—a level that demands serious sun protection. Although the UV level begins to drop after this peak, it remains notable; at 14:00, it settles at 9, then declines gently, hitting 3 by 17:00. As daylight fades towards the evening, it tapers off to 2 at 18:00 and finally returns to a safe 1 by 19:00. It's a vivid reminder of the sun's power throughout the day!

Monthly UV Index Trends in Ontario

As the UV Index fluctuates throughout the year, residents and visitors should be mindful of the changing sun exposure levels. During the winter months of January and December, the UV Index remains low at 2, allowing for longer safe exposure times of up to 45 minutes. However, as spring approaches, notable increases occur: March sees a rise to 6 (high exposure), while April and May escalate to 8 and 10 respectively, classified as very high, with burn times dropping to just 15 minutes. The peak UV risks are in May and June when the index reaches its highest at 10, making those months particularly hazardous for skin health. July and August maintain high levels, with UV indexes of 9, so protective measures are crucial. As summer gives way to autumn, the UV Index declines to 7 in September (high) and 5 in October (moderate), increasing the burn time. Finally, November drops back to a moderate level of 3. It is advisable for everyone to utilize appropriate sun protection during the high-risk months of April through September, particularly during peak hours, to mitigate the risk of skin damage.

Compare Ontario UV Index with Other United States Cities