Fullerton

What is the weather like in Fullerton in January?

In January, Fullerton is typically 38°F (3°C) during the day and 26°F (-4°C) at night. The month brings about 3.7 in (94 mm) of precipitation in total. Snowfall averages about 6.7 in (170 mm) over the month.

• Average high38°F (3°C)
• Average low26°F (-4°C)
• Precipitation3.7 in (94 mm)
• Clear or mostly clear days8
• Snowfall6.7 in (170 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)