Castaic weather in December (California, United States of America)

Looking to travel to Castaic in December? Check out this comprehensive weather guide.

In December, Castaic typically experiences moderate temperatures and moderate rainfall. December falls within the winter season. Throughout the daytime, temperatures often hover around 18°C. However, as the sun sets and evening approaches, there's a noticeable cool-down, with temperatures gently dropping to a more temperate 6°C. On average, it is the month with the lowest temperatures of the year. However the temperature is still pleasant and it won't ever get really cold.

Castaic in December usually receives moderate rainfall, averaging around 63 mm for the month. With this being the wettest month, keeping an umbrella on hand might save you from getting wet from a sudden shower. When we look at the climate data from the last 30 years, we can expect around 8 days of rain.

The city usually sees around 220 hours of sunlight, indicating many sunny days.

If you prefer dry days with pleasant temperatures, February, March, April, May, June, September, October and November typically offer the best circumstances. While August tends to showcase less optimal conditions.

For an in-depth look at the yearly conditions, visit our specialized Castaic climate page with graphs.

 

Castaic, monthly averages in December

Min Temperature 6°C  

Max Temperature 18°C  

Chance of Rain 27%  

Precipitation 63 mm  

Rainy days 8 days  

Humidity 52% *  

Sunshine 220 hours *  

Percentage Sunshine 71% *  

* Data from: Los Angeles, the United States of America (65 KM, 40 Miles).

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.

Weather conditions Weather

Temperatures

Precipitation

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Legend perfect weather pleasant tolerable unpleasant poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

So, what should you wear in Castaic in December?

For visitors traveling to Castaic, we recommend wearing layers. So maybe a skirt, t-shirt, shorts for during the day and jeans and a warm jacket for some days and evenings. Bring a rain jacket in case it rains during your stay. Plan on layering your clothes.

What To Do

We rated the following activities from 1 (least suitable) to 10 (best) to do in December.

Cycling

6/10

Walking

6/10

Camping

4/10

Outdoor sports

10/10

Interested in more climate information?

This site provides you with all the information you need about the climate in Castaic.

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.