UV Index
UV Index
Today's UV index in Cairns, Australia 
will be up to 6.5, 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: 2025-06-20
With Cairns's UV index reaching 6.5, 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.
Cairns has a high UV index, often reaching 10 or above during summer months. This means the sun's rays are very strong, especially around noon. UV levels drop in the winter but can still be moderate.
The weather in Cairns is tropical with two main seasons: a hot, wet summer and a warm, dry winter. Summers are rainy and humid, while winters are cooler and much drier. Temperatures stay warm all year, rarely getting cold.
Compared to other parts of Australia, Cairns is much warmer and wetter. It has more rain than cities like Sydney or Melbourne. Compared to neighboring countries like Papua New Guinea, Cairns is slightly cooler but has similar tropical weather.
See the UV index hour by hour for Cairns, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.