Last updated: August 27, 2025
In San Juan, Philippines, the average temperature in December is a warm 27°C (80°F), making it an inviting destination. Expect a minimum temperature of 24°C (75°F) and a maximum of 29°C (84°F). However, be prepared for frequent rainfall, with 243 mm (9.5 in) of precipitation spread over 26 days during the month. The air will be quite humid, with an average humidity level of 91%, adding to the tropical feel.
In December in San Juan, the average temperature is 27°C (80°F), with maximums reaching 29°C (84°F) and minimums dropping to as low as 24°C (75°F). This pleasant climate makes it an ideal destination for travelers seeking warmth and comfort.
In San Juan in December, the total precipitation amount is 243 mm (9.5 in) over a span of 26 days.
In San Juan in December, humidity is 91%. With an average temperature of 27°C (80°F), this humidity feels like a warm, heavy blanket that wraps around you, making outdoor exploration more challenging while also intensifying the heat and sweat, turning every adventure into a test of endurance.
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 (79°F) | 186 mm (7.3 inches) | 88% | extreme |
| February Weather | 26°C (79°F) | 137 mm (5.4 inches) | 86% | extreme |
| March Weather | 26°C (80°F) | 98 mm (3.9 inches) | 84% | extreme |
| April Weather | 27°C (80°F) | 72 mm (2.8 inches) | 82% | extreme |
| May Weather | 27°C (82°F) | 184 mm (7.2 inches) | 83% | extreme |
| June Weather | 27°C (82°F) | 158 mm (6.2 inches) | 85% | extreme |
| July Weather | 27°C (81°F) | 183 mm (7.2 inches) | 86% | extreme |
| August Weather | 27°C (81°F) | 143 mm (5.6 inches) | 87% | extreme |
| September Weather | 27°C (81°F) | 190 mm (7.5 inches) | 89% | extreme |
| October Weather | 27°C (81°F) | 227 mm (9.0 inches) | 85% | extreme |
| November Weather | 27°C (81°F) | 247 mm (9.7 inches) | 87% | extreme |
| December Weather | 27°C (80°F) | 243 mm (9.5 inches) | 91% | extreme |