UV Index
UV Index
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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 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 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.
The UV index in Lahti, Finland is generally low due to its northern location. It reaches moderate levels during the summer months, but rarely reaches high levels.
Lahti experiences four distinct seasons: a cold and snowy winter, a cool and rainy spring, a warm and sunny summer, and a colorful and crisp autumn. Winter lasts from November to March, while summer is from June to August.
Compared to its region and neighboring countries, Lahti is cooler and has longer winters. Its summers, while shorter, are similar in temperature to those in other parts of Finland, Sweden, and Norway. Lahti's climate is influenced by its inland location and its distance from the moderating effects of the sea.
The chart below displays the average Shortwave Radiation Sum (MJ/m²) for each month of the last year in Lahti. It's designed to provide you with a better understanding of the yearly weather and sun exposure.