The weather in San Bernardino in December is very cold with temperatures between 4°C and 17°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in San Bernardino during the month of December. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in San Bernardino in December 2024.
If you’re planning to visit San Bernardino in the near future, we highly recommend that you review the 14 day weather forecast for San Bernardino before you arrive.
Temperatures
17° / 4°
Rainy Days
3
Snowy Days
0
Dry Days
28
Rainfall
63
mm
Sun Hours
11.0
Hrs
