March Weather in Castaic, United States

Last updated: June 24, 2025

In Castaic, United States, the average temperature in March is a mild 12°C (55°F). However, temperatures can vary, with a minimum of 0°C (32°F) and a maximum reaching up to 29°C (84°F). Expect 71 mm (2.8 in) of precipitation spread over 9 days, contributing to an average humidity of 75%. Enjoy the season's charm!

March Temperature in Castaic

In March in Castaic, the average temperature is 12°C (55°F). Maximum temperatures can reach 29°C (84°F), while minimum temperatures can dip as low as 0°C (32°F). Be prepared for a range of weather conditions, making it a great time for both outdoor activities and cozy indoor explorations.

March Weather in Castaic: Daily Temperature Highs, Lows, and Averages

The chart illustrates March temperature patterns in Castaic, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Castaic, March typically has an average temperature of 12°C (55°F), with highs reaching up to 29°C (84°F) and lows dropping to around 0°C (32°F).

Data source: Temperature data for Castaic generated using information from the Copernicus Climate Change Service.

March Precipitation in Castaic

In Castaic in March, the precipitation amount is 71 mm (2.8 in) spread over 9 days.

March Precipitation Trends in Castaic

The chart displays monthly precipitation patterns in Castaic, with values for each month alongside March’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how March’s conditions compare to those of other months. In Castaic, March typically receives around 71 mm (2.8 inches) of precipitation spread over approximately 9 days.

Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

March Humidity in Castaic

In Castaic in March humidity is 75%. With an average temperature of 12°C (55°F), this humidity feels like a damp blanket wrapping around you, making travel slightly uncomfortable as the chill magnifies the moisture in the air.

March Average Humidity in Castaic

This chart illustrates the average monthly humidity levels in Castaic, with March’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In March, average humidity in Castaic is approximately 75%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for March generated using information from the Copernicus Climate Change Service.

March UV Index in Castaic

In Castaic in March, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Castaic.

Maximum UV Index Levels in Castaic for March

The chart shows the monthly maximum UV Index (UVI) for Castaic in March, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In March, the maximum UV index in Castaic typically reaches 8, which falls under the very high exposure category.

Data source: Castaic March UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How March Weather in Castaic Compares to Other Months

Weather in Castaic varies notably across the year, with each month offering distinct climate conditions. This page compares March’s weather to other months in Castaic, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Castaic, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	10°C (51°F)	63 mm (2.5 inches)	78%	moderate
February Weather	11°C (52°F)	55 mm (2.2 inches)	82%	high
March Weather	12°C (55°F)	71 mm (2.8 inches)	75%	very high
April Weather	16°C (62°F)	22 mm (0.9 inches)	68%	very high
May Weather	18°C (65°F)	16 mm (0.6 inches)	57%	extreme
June Weather	22°C (72°F)	3 mm (0.1 inches)	52%	extreme
July Weather	25°C (78°F)	1 mm (0.1 inches)	46%	extreme
August Weather	26°C (78°F)	2 mm (0.1 inches)	39%	extreme
September Weather	23°C (74°F)	4 mm (0.2 inches)	48%	very high
October Weather	19°C (66°F)	9 mm (0.3 inches)	59%	high
November Weather	15°C (59°F)	19 mm (0.7 inches)	72%	moderate
December Weather	10°C (51°F)	68 mm (2.7 inches)	76%	moderate