UV Index
UV Index
Today's UV index in Leiden, Netherlands 
will be up to 5.1, indicating a moderate 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 a UV index reaching up to 5.1 in Leiden, 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.
Leiden's UV index is generally low to moderate, ranging from 1 in winter to around 6 in summer. It rarely reaches very high levels due to its northern location and often cloudy skies. Spring and summer have higher UV levels compared to autumn and winter.
Leiden experiences mild weather with four seasons. Winters are cold and wet, summers are cool and sometimes sunny, while spring and autumn bring moderate temperatures and frequent rain. Rainfall is spread fairly evenly throughout the year, with no extreme dry season.
Compared to the wider Netherlands, Leiden's climate is typical, with mild temperatures and frequent rain. Compared to neighboring countries like Germany and Belgium, Leiden is cooler and wetter, especially in summer, due to its coastal location near the North Sea.
See the UV index hour by hour for Leiden, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.