Last updated: March 2, 2024
The weather in San Jose, Costa Rica, during May is characterized by an average temperature of 26°C (78°F). Highs can soar to 29°C (85°F), while lows may dip to 23°C (74°F). Typically, the humidity level in San Jose throughout May hovers around 63%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In May, San Jose averages 297 mm (11.7 inches) of rainfall, typically over the course of 28 rainy days. The month enjoys an average of 12 hours 37 minutes of daylight, with the sun shining for approximately 9 hours 27 minutes each day. Additionally, there is a 23% probability of sunny days during this period.
Precipitation
Rainy days
Sunshine hours
Chance of sun
In May, the UV Index in San Jose reaches a maximum of 14, indicating a level of Extreme exposure. The most intense UV radiation typically occurs between 11:00 and 13:00, during which unprotected skin may burn in as little as 10 minutes.
| 07:00 | 08:00 | 09:00 | 10:00 | 11:00 | 12:00 | 13:00 | 14:00 | 15:00 | 16:00 | 17:00 | 18:00 | 19:00 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UVI | 2 | 5 | 8 | 12 | 14 | 14 | 12 | 8 | 5 | 2 | 1 | 0 | 0 |
| Exposure | Low | Moderate | VeryHigh | Extreme | VeryHigh | Moderate | Low | ||||||
| Time to burn | 45 min | 30 min | 15 min | 10 min | 15 min | 30 min | 45 min | ||||||