UV Index
UV Index
Today's UV index in Wiarton, 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: 2025-06-01
With Wiarton'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.
Wiarton, Canada, typically experiences a UV index that ranges from low to moderate throughout the year, with higher levels in late spring and summer months. The UV index rarely reaches extreme levels. Seasonal patterns in Wiarton include cold, snowy winters and warm, sometimes humid summers. Spring and fall are transitional seasons with mild temperatures and variable weather. Snowfall is common in winter, and summers often see occasional rain showers. Compared to the wider Ontario region, Wiarton tends to have slightly cooler temperatures due to its proximity to Lake Huron. It generally experiences less humidity than areas further inland and has more moderate weather than southern parts of neighboring U.S. states.
See the UV index hour by hour for Wiarton, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.