Walnut Creek in December

Average high

12.2°C

Average low

5.9°C

Rainfall

—

— wet days

Comfort score

out of 100

December in Walnut Creek averages a daily high of 12.2°C with nights around 5.9°C. Generally workable, with some weather to plan around.

Across the year, the best time to visit Walnut Creek is April–October.

Based on BRIONES CALIFORNIA, CA US (6.3km), 1995–2024. 28 years of December data.