UV Index
UV Index
Today's UV index in Aarau, Switzerland 
will be up to 6, 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: 2025-05-10
With Aarau's UV index reaching 6, 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.
Aarau, Switzerland has a moderate UV index that varies throughout the year, generally ranging from low to moderate levels. UV intensity peaks in summer months, especially June and July, and is lowest during winter.
Seasonally, Aarau experiences warm summers with temperatures often in the low to mid-20s Celsius and cold winters with occasional snow and temperatures around freezing. Spring and autumn bring mild and variable weather with occasional rain showers.
Compared to neighboring countries like France and Germany, Aarau’s weather is similar but slightly cooler due to its elevation. Its UV index is generally lower than southern Switzerland but comparable to other northern Swiss cities and nearby European regions.
See the UV index hour by hour for Aarau, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.