The temperatures in Rancho Cucamonga in December are quite cold with temperatures between 9°C and 18°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Rancho Cucamonga 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 Rancho Cucamonga in December 2024.
If you’re planning to visit Rancho Cucamonga in the near future, we highly recommend that you review the 14 day weather forecast for Rancho Cucamonga before you arrive.
Temperatures
18° / 9°
Rainy Days
3
Snowy Days
0
Dry Days
28
Rainfall
72
mm
Sun Hours
10.9
Hrs