Castaic (CA) Rainfall & Precipitation: Monthly Averages and Year-Round Insights

This page shows the average amount of rainfall per month in Castaic (CA). The numbers are calculated over a 30-year period to provide a reliable average. Let's now guide you through the details for a complete overview.

Castaic maintains relatively dry conditions year-round, recording average annual precipitation of 285 mm.

Monthly Precipitation Levels

The average number of days each month with precipitation (> 0.2 mm)

The climate in Castaic shows significant variation throughout the year. Expect 63 mm of precipitation during the wettest month December, distributed over 8 rainy days.

In contrast, June offers drier and sunnier days, with around 0.1 mm of rainfall over 0 rainy days.

December, the city’s wettest month, has a maximum daytime temperature of 18°C and receives 220 hours of sunshine. During the driest month June you can expect a temperature of 31°C. For more detailed insights into the city’s temperatures, visit our Castaic Temperature page.

Annual Precipitation in the United States of America

The map below shows the annual precipitation across the United States of America. You can also select the different months in case you are interested in a specific month.

Amsterdam Precipitation Compared World Wide

Castaic’s average annual precipitation is 285 mm. Let’s compare this to some popular worldwide tourist destinations:

New York City, USA, receives 1276 mm of rainfall annually, with precipitation evenly distributed throughout the year.

Beijing, China, receives 560 mm of annual precipitation, concentrated in the summer months.

In Tokyo, Japan, the average annual precipitation is 1528 mm, with significant summer rains due to typhoon season.

Kuala Lumpur, Malaysia, receives 2529 mm of annual rainfall, characteristic of its equatorial tropical rainforest climate, with consistent rainfall throughout the year and peak months during March and November.

How is Precipitation Measured?

Precipitation amounts are measured using specific gauges installed at weather stations, collecting both rain and snow and any other type of precipitation. Rainfall is measured directly in millimeters, while that from snow and ice is obtained by melting it. Automated systems often incorporate heaters to make this easier.

Information from these stations is transmitted via Wi-Fi, satellite, GPS, or telephone connections to central monitoring networks. This information is immediately updated and integrated into weather models and forecasts.

How Does Precipitation Affect Local Climate?

Precipitation has a very strong role in determining the local climate and ecosystem:

• Rainy Seasons: Many parts of the world have well-defined wet seasons where precipitation is distinctly higher. These are normally accompanied by lush vegetation and temperature patterns.
• Dry Seasons: In areas where the climate is either desert or Mediterranean, the amount of precipitation is drastically reduced, leading to a shortage of water and arid conditions.

For more detailed information about Castaic (CA)’s weather, including sunshine hours, humidity levels, and temperature data, visit our Castaic (CA) Climate page.