Fullerton climate

Typical historical weather for Fullerton, United States, averaged across 10 years of hourly climate data. Pick a date for a specific day.

Want today's actual conditions instead? See the current forecast for Fullerton.

Annual average

11.1°C

across all months

Warmest month

30.2°C

Jul average high

Coolest month

-8.4°C

Jan average low

Annual rainfall

770mm

total per year

Monthly averages

Average daily high/low temperature (band) and monthly rainfall (bars).

● Avg high● Avg low▮ Rainfall

Records on file

Hottest day

38.7°C

21 August 2023

Coldest day

-33.5°C

16 February 2021

Wettest day

63.7mm

2 July 2016

Windiest day

11.8m/s

23 April 2022