December in Fremont averages a daily high of 14.8°C with nights around 5.8°C. Expect roughly 10.6 wet days totalling 84.6mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Fremont is May–October.
Based on FREMONT, CA US (2.5km), 1995–2024. 28 years of December data.