San Bernardino Weather in December

December in San Bernardino brings very low temperatures, with highs of -2°C (28°F) and nights dropping to -10°C (14°F). Rainfall is on the higher side this month, averaging around 98 mm (3.9 in), so keep a rain jacket handy.

Rainfall in San Bernardino in December

The climate data from previous years indicates about 15 days of snow, averaging 98 mm (3.9 in) for the month. Expect a fairly normal spread of rainfall this month, with no particular pattern of very heavy or very persistent showers.

Temperature in San Bernardino in December

In December, expect very low temperatures in San Bernardino, with highs of -2°C (28°F) and lows of -10°C (14°F) at night. December is part of the winter season. Even daytime conditions remain cold, making layers, a warm coat, and winter accessories a good idea. With lows of -10°C (14°F), nights are freezing. Packing a spare blanket is worth considering if you're staying somewhere that might not be fully heated. Expect freezing temperatures this month, so ensure you have plenty of warm clothing. It's important to be prepared.

Sunshine in San Bernardino in December

The area experiences limited sunny days, amounting to roughly 72 hours of sunshine. This makes it perfect for those who lean towards cooler, cloudier settings rather than intense sunlit days.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. July and August typically offer the best weather for San Bernardino.