Castro Valley weather in December (California, United States of America)
How is the weather in Castro Valley in December? This guide provides all the details you need.
In December, Castro Valley typically experiences moderate temperatures and high rainfall. December is a winter month. Daytime temperatures hover around 14°C, while nights can cool down to about 5°C. This month often claims the chilliest averages of the year.
Castro Valley in December usually receives high rainfall, averaging around 111 mm for the month. It is the wettest month of the year, so an umbrella might come in handy. Typically around 13 days of rainfall is expected.
The area experiences a moderate amount of sunshine, with approximately 160 hours of sunlight expected. This makes it neither too gloomy nor overly bright.
If you're looking for dry conditions and comfortable temperatures, December may not be the ideal month to visit Castro Valley. May, June, July, August, September and October typically offer the most agreeable circumstances. On the other hand, December tends to be characterized by conditions that may not be as optimal.
For an in-depth look at the yearly conditions, visit our specialized Castro Valley climate page with graphs.
Castro Valley, monthly averages in December
Where to go in the United States of America in December
Find out more about the weather in the United States of America in December and which places have the best weather conditions in this month.
So, what should you wear in Castro Valley in December?
Plan on layering your clothes. Some days or part of the day it will be nice and warm and some moments it can be a bit chilly. Bring a rain jacket in case it rains during your stay.What To Do
We rated the following activities from 1 (least suitable) to 10 (best) to do in December.
Interested in more climate information?
This site provides you with all the information you need about the climate in Castro Valley.
Our site offers climate and forecast data for every country in the world. Are you going to the United States of America? On this website you can find historical weather averages for many cities in the United States of America. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal climate conditions. Find out where to go with our weather planner.