UV Index
UV Index
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Today's UV index in Aarau, Switzerland 
will be up to 4, indicating a moderate level of sun exposure for the average person. Check the annual sun radiation in the city and our tips for today to make sure you're safe in the sun.
With a UV index reaching up to 4 in Aarau, stay shaded during midday when the sun is strongest; wear protective clothing, a wide-brimmed hat, UV-blocking sunglasses; apply SPF 30+ sunscreen every 2 hours, even on cloudy days; and be cautious of heightened UV on bright surfaces.
Aarau's UV index is moderate, with an average annual value of 3.3, indicating a moderate risk of sunburn. During the summer months, the UV index peaks at around 7, while in winter it drops to around 1.
Aarau experiences a temperate climate, with four distinct seasons. Winters are cool and humid, with average temperatures ranging from 0°C to 4°C. Spring and autumn are mild, while summers are warm with average temperatures around 22°C.
Compared to other regions in Switzerland, Aarau's climate is relatively mild. It is similar to its neighboring country, Germany, but has slightly warmer winters and cooler summers than Austria. Overall, Aarau's weather is typical of the northern Alpine region.