The temperatures in Fullerton in October are comfortable with low of 17°C and and high up to 27°C.
You can expect a few rainy days in Fullerton during October, but usually the weather is comfortable in October.
Our weather forecast can give you a great sense of what weather to expect in Fullerton in October 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
27° / 17°
Rainy Days
1
Snowy Days
0
Dry Days
30
Rainfall
12
mm
Sun Hours
10.7
Hrs
