Last updated: March 2, 2024
The weather in San Diego, Costa Rica, during January is characterized by an average temperature of 17°C (63°F). Highs can soar to 23°C (74°F), while lows may dip to 12°C (55°F). Typically, the humidity level in San Diego throughout January hovers around 68%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In January, San Diego averages 93 mm (3.7 inches) of rainfall, typically over the course of 11 rainy days. The month enjoys an average of 11 hours 36 minutes of daylight, with the sun shining for approximately 7 hours 55 minutes each day. Additionally, there is a 47% probability of sunny days during this period.
Precipitation
Rainy days
Sunshine hours
Chance of sun
In January, the UV Index in San Diego reaches a maximum of 12, 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 | 1 | 3 | 6 | 10 | 12 | 12 | 11 | 8 | 4 | 2 | 1 | 0 | 0 |
| Exposure | Low | Moderate | High | VeryHigh | Extreme | VeryHigh | Moderate | Low | |||||
| Time to burn | 45 min | 30 min | 25 min | 15 min | 10 min | 15 min | 30 min | 45 min | |||||