Last updated: August 27, 2025
In San Juan, Philippines, the average temperature in December is a warm 27°C (80°F), with a comfortable minimum of 22°C (72°F) and a peak of 31°C (88°F). During this time, you can expect about 65 mm (2.6 in) of precipitation spread over 10 days, contributing to an average humidity of 81%. Perfect for enjoying the vibrant atmosphere while staying cool!
In December in San Juan, the average temperature is 27°C (80°F), with maximums reaching 31°C (88°F) and minimums dropping to as low as 22°C (72°F). This pleasant weather makes it an ideal time for outdoor activities and sightseeing.
In San Juan in December, the precipitation amount is 65 mm (2.6 in) over a span of 10 days.
In San Juan in December, humidity is 81%. With an average temperature of 27°C (80°F), this humidity feels like a warm blanket wrapping around you, making travel feel sticky and heavy, but the vibrant atmosphere can still be invigorating, inviting moments of exploration in slower, more deliberate steps.
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 (79°F) | 36 mm (1.4 inches) | 74% | extreme |
| February Weather | 26°C (79°F) | 27 mm (1.1 inches) | 73% | extreme |
| March Weather | 27°C (81°F) | 37 mm (1.4 inches) | 74% | extreme |
| April Weather | 28°C (82°F) | 52 mm (2.1 inches) | 76% | extreme |
| May Weather | 28°C (83°F) | 140 mm (5.5 inches) | 76% | extreme |
| June Weather | 27°C (82°F) | 419 mm (16.5 inches) | 79% | extreme |
| July Weather | 27°C (80°F) | 659 mm (25.9 inches) | 83% | extreme |
| August Weather | 26°C (80°F) | 680 mm (26.8 inches) | 83% | extreme |
| September Weather | 27°C (81°F) | 420 mm (16.5 inches) | 82% | extreme |
| October Weather | 27°C (81°F) | 243 mm (9.6 inches) | 80% | extreme |
| November Weather | 27°C (81°F) | 130 mm (5.1 inches) | 84% | very high |
| December Weather | 27°C (80°F) | 65 mm (2.6 inches) | 81% | very high |