Last updated: August 27, 2025
In December, the average temperature in San Juan, Philippines hovers around 26°C (79°F), with a minimum of 23°C (74°F) and a maximum reaching 30°C (85°F). Expect a total precipitation of 310 mm (12.2 in) spread across 26 days, while the average humidity stands at a high 86%. Embrace the warmth and be prepared for those occasional showers!
In December in San Juan, the average temperature is 26°C (79°F). The maximum can reach 30°C (85°F), while the minimum can dip to 23°C (74°F). This mild climate makes it an ideal destination for travelers seeking pleasant weather and outdoor activities.
In San Juan in December, the precipitation amount is 310 mm (12.2 in) over the course of 26 days.
In San Juan in December, humidity is 86%. With an average temperature of 26°C (79°F), this humidity feels like a warm, heavy blanket clinging to your skin, making even short walks a challenge and turning travel into a sticky, sweat-inducing experience.
In San Juan in December, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, 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 (78°F) | 109 mm (4.3 inches) | 78% | extreme |
| February Weather | 25°C (78°F) | 78 mm (3.1 inches) | 75% | extreme |
| March Weather | 26°C (80°F) | 61 mm (2.4 inches) | 74% | extreme |
| April Weather | 27°C (81°F) | 62 mm (2.4 inches) | 76% | extreme |
| May Weather | 28°C (83°F) | 174 mm (6.9 inches) | 76% | extreme |
| June Weather | 28°C (83°F) | 258 mm (10.2 inches) | 81% | extreme |
| July Weather | 27°C (82°F) | 360 mm (14.2 inches) | 84% | extreme |
| August Weather | 28°C (82°F) | 233 mm (9.2 inches) | 85% | extreme |
| September Weather | 27°C (81°F) | 320 mm (12.6 inches) | 85% | extreme |
| October Weather | 27°C (81°F) | 326 mm (12.8 inches) | 82% | extreme |
| November Weather | 27°C (81°F) | 258 mm (10.2 inches) | 85% | extreme |
| December Weather | 26°C (79°F) | 310 mm (12.2 inches) | 86% | very high |