UV Index
UV Index
Today's UV index in San José, Costa Rica 
will be up to 13.4, indicating a extreme 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
UV index at 13.4 in San José means extreme risk: limit outdoor time especially from 10 a.m. to 4 p.m., actively seek shade, wear protective clothing, broad-brimmed hat, apply SPF 30+ sunscreen every 2 hours, and wear UV-blocking sunglasses. Watch for bright surfaces like water and snow increasing UV exposure.
San José, Costa Rica typically has a UV index ranging from moderate to high, peaking around 10 during the dry season months. The UV index is lower during the rainy season but can still reach significant levels.
The city experiences a dry season from December to April and a rainy season from May to November. Temperatures remain warm year-round, with slightly cooler evenings during the dry season and frequent afternoon showers in the rainy season.
Compared to other parts of Central America, San José has milder temperatures due to its elevation. Neighboring countries often experience hotter and more humid conditions in their lowland areas, while San José enjoys a more temperate climate.
See the UV index hour by hour for San José, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.