UV Index
UV Index
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Today's UV index in San José, Costa Rica 
will be up to 11.6, indicating a extreme 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.
UV index at 11.6 in San José means extreme risk; limit outdoor time from 10 a.m. to 4 p.m., use shade, protective clothing, SPF 30+ sunscreen, and sunglasses; watch for bright surfaces like water and snow increasing UV exposure.
The UV index in San José, Costa Rica, typically ranges from low to very high throughout the year, with levels peaking from December to April.
San José has two main seasons: the dry season, which runs from December to April, and the wet season, which lasts from May to November. However, rainfall can still occur during the dry season, and occasional showers can happen in the wet season.
Compared to its region and neighboring countries, San José generally experiences milder temperatures and more rainfall. While much of Central America can be extremely hot and dry, San José's elevation provides a more temperate climate, with average temperatures ranging from 60°F to 80°F (15°C to 27°C) year-round.
The chart below displays the average Shortwave Radiation Sum (MJ/m²) for each month of the last year in San José. It's designed to provide you with a better understanding of the yearly weather and sun exposure.