UV Index
UV Index
Today's UV index in Lahti, Finland 
will be up to 3.5, 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: 2025-05-09
With a UV index reaching up to 3.5 in Lahti, 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.
Lahti has a UV index that is generally low to moderate, often ranging from 0 in winter to around 5 or 6 in summer. The highest UV levels occur during late spring and early summer.
Seasonally, Lahti experiences cold, snowy winters and mild summers. Winter temperatures often drop below freezing with snow cover, while summers are relatively short and cool, with temperatures typically between 15 to 22 degrees Celsius.
Compared to southern Finland and nearby countries like Sweden and Estonia, Lahti’s weather is colder in winter but similar overall. Its inland location means it has more temperature extremes than coastal areas, with colder winters and warmer summer days.
See the UV index hour by hour for Lahti, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.