Last updated: August 27, 2025
In December, the average temperature in San Juan, Panama is a warm 26°C (78°F). Expect a mix of comfort and warmth, with minimums dipping to 20°C (69°F) and maximums reaching 32°C (90°F). While soaking up the sun, be prepared for some rain, as precipitation averages around 103 mm (4.1 in) over 9 days. The air is also quite humid, with an average humidity level of 79%, creating a tropical feel throughout the month.
In December in San Juan, the average temperature is 26°C (78°F). Maximum temperatures can reach up to 32°C (90°F), while minimums can dip as low as 20°C (69°F). This pleasant weather makes San Juan an ideal destination for travelers seeking a warm and enjoyable climate.
In San Juan in December, the precipitation amount is 103 mm (4.1 in) distributed over 9 days.
In San Juan in December, humidity is 79%. With an average temperature of 26°C (78°F), this humidity feels like a tropical blanket enveloping you, making outdoor activities less comfortable for traveling.
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) | 31 mm (1.2 inches) | 72% | extreme |
| February Weather | 27°C (80°F) | 8 mm (0.3 inches) | 71% | extreme |
| March Weather | 27°C (81°F) | 7 mm (0.3 inches) | 69% | extreme |
| April Weather | 27°C (81°F) | 105 mm (4.1 inches) | 70% | extreme |
| May Weather | 26°C (79°F) | 355 mm (14.0 inches) | 73% | extreme |
| June Weather | 26°C (78°F) | 353 mm (13.9 inches) | 90% | extreme |
| July Weather | 26°C (78°F) | 404 mm (15.9 inches) | 88% | extreme |
| August Weather | 25°C (78°F) | 359 mm (14.1 inches) | 87% | extreme |
| September Weather | 25°C (78°F) | 459 mm (18.1 inches) | 87% | extreme |
| October Weather | 25°C (77°F) | 410 mm (16.2 inches) | 86% | extreme |
| November Weather | 25°C (77°F) | 385 mm (15.1 inches) | 86% | extreme |
| December Weather | 26°C (78°F) | 103 mm (4.1 inches) | 79% | extreme |