UV Index
UV Index
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Today's UV index in Tokyo, Japan 
will be up to 3.1, 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 3.1 in Tokyo, 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 Tokyo can reach high levels, particularly in the summer months. It is important to be aware of the UV index and take appropriate measures to protect yourself from the sun's rays.
Tokyo has four distinct seasons: a mild spring, a hot and humid summer, a crisp autumn, and a cold winter. Spring and autumn are popular times to visit, with cherry blossoms in the spring and vibrant foliage in the fall.
Compared to its region and neighboring countries, Tokyo has a relatively mild climate. It experiences hot, humid summers and cold winters, but these are generally less extreme than in other parts of Asia. The city also receives a significant amount of rainfall throughout the year.
The chart below displays the average Shortwave Radiation Sum (MJ/m²) for each month of the last year in Tokyo. It's designed to provide you with a better understanding of the yearly weather and sun exposure.