Last updated: August 27, 2025
In December, the average temperature in San Juan, Philippines hovers around 27°C (80°F), providing a warm atmosphere for outdoor activities. Temperatures can dip to a minimum of 23°C (73°F) and peak at a maximum of 31°C (88°F). Visitors should also prepare for a significant precipitation of 378 mm (14.9 in) over the 30-day period, coupled with an average humidity level of 86%. Embrace the tropical vibes, but don’t forget your umbrella!
In December in San Juan, the average temperature is 27°C (80°F). Maximum can reach 31°C (88°F) and minimum can be as low as 23°C (73°F). This makes it an ideal time for traveling, offering warm weather perfect for outdoor adventures and leisurely exploration.
In San Juan in December, the precipitation amount is 378 mm (14.9 in) over the course of 30 days.
In San Juan in December, humidity is 86%. With an average temperature of 27°C (80°F), this humidity feels like a warm, sticky blanket enveloping you, making travel feel heavy and exhausting as you navigate the sultry air.
In San Juan in December, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in San Juan.
UV Risk Categories
Weather in San Juan varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in San Juan, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 26°C (80°F) | 308 mm (12.1 inches) | 86% | extreme |
| February Weather | 26°C (79°F) | 211 mm (8.3 inches) | 85% | extreme |
| March Weather | 27°C (81°F) | 166 mm (6.5 inches) | 87% | extreme |
| April Weather | 27°C (82°F) | 106 mm (4.2 inches) | 87% | extreme |
| May Weather | 28°C (83°F) | 171 mm (6.8 inches) | 82% | extreme |
| June Weather | 28°C (83°F) | 216 mm (8.5 inches) | 79% | extreme |
| July Weather | 28°C (82°F) | 225 mm (8.8 inches) | 80% | extreme |
| August Weather | 28°C (83°F) | 192 mm (7.6 inches) | 80% | extreme |
| September Weather | 28°C (82°F) | 218 mm (8.6 inches) | 83% | extreme |
| October Weather | 28°C (82°F) | 272 mm (10.7 inches) | 79% | extreme |
| November Weather | 27°C (81°F) | 231 mm (9.1 inches) | 82% | extreme |
| December Weather | 27°C (80°F) | 378 mm (14.9 inches) | 86% | extreme |