Best Time to Visit Fullerton
Best time: Jul, Jun, Aug, May.
Aug is warmest (29.8°C high); Feb is rainiest (80 mm).
Fullerton weather by month
| Month | High °C | Low °C | Rain mm | Sun hrs |
|---|---|---|---|---|
| Jan | 20.3 | 7.5 | 79 | 4.5 |
| Feb | 21 | 8.4 | 80 | 5.4 |
| Mar | 21.2 | 9.4 | 70 | 7.6 |
| Apr | 23.5 | 10.8 | 22 | 9.6 |
| May | 24.3 | 13.3 | 5 | 10.4 |
| Jun | 26.6 | 15.4 | 2 | 11.1 |
| Jul | 29.1 | 17.2 | 1 | 11.1 |
| Aug | 29.8 | 17.8 | 3 | 10.6 |
| Sep | 29 | 16.8 | 7 | 8.7 |
| Oct | 26.6 | 13.8 | 11 | 6.6 |
| Nov | 23.3 | 9.6 | 35 | 5.2 |
| Dec | 20.5 | 7 | 50 | 4.3 |
Average high temperature
Best months by activity
Overall: JulJunAugMay
Beaches: JulAugJunSep
Hiking: MayJunAprJul
Sightseeing: JulJunAugMay
Fullerton quick facts
What to pack
Mild year-round — pack layers and a light jacket.
Frequently asked questions
When is the best time to visit Fullerton?
Jul, Jun, Aug, May.
What is the rainiest month?
Feb, about 80 mm.
What is the warmest month?
Aug, with average highs of 29.8°C.
Where to stay
See Fullerton hotels · Book Fullerton tours & activities
All destinations · Best time to visit New York · Best time to visit Los Angeles · Best time to visit Miami · Best time to visit San Francisco
Climate data: Open-Meteo Historical (ERA5), 1991–2020 climate normals.
Licensed under CC BY 4.0.
Open-Meteo.