The temperatures in Fullerton in January are usually low and can range between 10°C and 20°C.
You can expect about 3 to 8 days of rain in Fullerton during the month of January. 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 Fullerton in January 2025.
If you’re planning to visit Fullerton in the near future, we highly recommend that you review the 14 day weather forecast for Fullerton before you arrive.
Temperatures
20° / 10°
Rainy Days
3
Snowy Days
0
Dry Days
28
Rainfall
63
mm
Sun Hours
9.1
Hrs
