Climate almanac
Fullerton
California, United States · 33.87°, -117.93°
What is the weather like in Fullerton in August?
In August, Fullerton is typically 81°F (27°C) during the day and 67°F (19°C) at night. The month brings about 0.3 in (7 mm) of precipitation in total.
- Average high81°F (27°C)
- Average low67°F (19°C)
- Precipitation0.3 in (7 mm)
- Clear or mostly clear days25
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)