Last updated: August 27, 2025
In December, the average temperature in San Francisco, Philippines is a warm 27°C (80°F), where it can range from a comfortable 23°C (74°F) to a cozy 31°C (88°F). Be prepared for a wet month, as precipitation averages around 274 mm (10.8 in) over 26 days, and don't forget to expect high humidity levels at 89%!
In December, in San Francisco, the average temperature is a pleasant 27°C (80°F). The maximum can reach as high as 31°C (88°F), while the minimum can drop to a comfortable 23°C (74°F). This makes San Francisco an ideal destination for travelers seeking warm and enjoyable weather during this time.
In San Francisco in December, the precipitation amount is 274 mm (10.8 in) spread over 26 days, indicating a wet period typical for this time of year.
In San Francisco in December humidity is 89%. With an average temperature of 27°C (80°F), this humidity feels like a warm, sticky embrace, making travel feel heavy and reminiscent of a sauna, where even the slightest exertion can leave you feeling drenched and yearning for a cool breeze.
In San Francisco 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 Francisco.
UV Risk Categories
Weather in San Francisco varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in San Francisco, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 26°C (79°F) | 209 mm (8.2 inches) | 82% | extreme |
| February Weather | 26°C (79°F) | 100 mm (3.9 inches) | 78% | extreme |
| March Weather | 27°C (80°F) | 79 mm (3.1 inches) | 77% | extreme |
| April Weather | 28°C (82°F) | 77 mm (3.0 inches) | 79% | extreme |
| May Weather | 28°C (83°F) | 139 mm (5.5 inches) | 83% | extreme |
| June Weather | 28°C (83°F) | 253 mm (9.9 inches) | 86% | extreme |
| July Weather | 28°C (82°F) | 382 mm (15.0 inches) | 87% | extreme |
| August Weather | 28°C (82°F) | 340 mm (13.4 inches) | 87% | extreme |
| September Weather | 28°C (82°F) | 318 mm (12.5 inches) | 88% | extreme |
| October Weather | 27°C (82°F) | 262 mm (10.3 inches) | 85% | extreme |
| November Weather | 27°C (81°F) | 218 mm (8.6 inches) | 89% | extreme |
| December Weather | 27°C (80°F) | 274 mm (10.8 inches) | 89% | extreme |