March Weather in Simi Valley, United States

Last updated: June 24, 2025

In March, the average temperature in Simi Valley, United States is a comfortable 14°C (57°F). Expect a range from a cool 3°C (37°F) to a warm 29°C (85°F). With an average humidity of 75%, the weather can feel quite muggy. Be prepared for approximately 80 mm (3.2 in) of precipitation over about 8 days, making it a good idea to pack an umbrella!

March Temperature in Simi Valley

In March in Simi Valley, the average temperature is 14°C (57°F). Maximum temperatures can reach 29°C (85°F), while minimums can drop as low as 3°C (37°F). Overall, this makes Simi Valley a great destination for travelers seeking mild weather with some variation.

March Weather in Simi Valley: Daily Temperature Highs, Lows, and Averages

The chart illustrates March temperature patterns in Simi Valley, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Simi Valley, March typically has an average temperature of 14°C (57°F), with highs reaching up to 29°C (85°F) and lows dropping to around 3°C (37°F).

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

March Precipitation in Simi Valley

In Simi Valley in March, the total precipitation amount is 80 mm (3.2 in), occurring over a span of 8 days.

March Precipitation Trends in Simi Valley

The chart displays monthly precipitation patterns in Simi Valley, 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 Simi Valley, March typically receives around 80 mm (3.2 inches) of precipitation spread over approximately 8 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

March Humidity in Simi Valley

In Simi Valley in March, humidity is 75%. With an average temperature of 14°C (57°F), this humidity feels like a damp blanket enveloping you, making outdoor activities somewhat uncomfortable and travel a bit sluggish, as the air feels heavy and the heat lingers close to your skin.

March Average Humidity in Simi Valley

This chart illustrates the average monthly humidity levels in Simi Valley, 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 Simi Valley 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 Simi Valley

In Simi Valley 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 Simi Valley.

Maximum UV Index Levels in Simi Valley for March

The chart shows the monthly maximum UV Index (UVI) for Simi Valley 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 Simi Valley typically reaches 8, which falls under the very high exposure category.

Data source: Simi Valley 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 Simi Valley Compares to Other Months

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

This table compares monthly weather conditions in Simi Valley, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	13°C (55°F)	79 mm (3.1 inches)	78%	moderate
February Weather	13°C (55°F)	63 mm (2.5 inches)	82%	high
March Weather	14°C (57°F)	80 mm (3.2 inches)	75%	very high
April Weather	17°C (62°F)	20 mm (0.8 inches)	68%	very high
May Weather	17°C (64°F)	15 mm (0.6 inches)	57%	extreme
June Weather	20°C (69°F)	2 mm (0.1 inches)	52%	extreme
July Weather	23°C (74°F)	1 mm (0.0 inches)	46%	extreme
August Weather	24°C (75°F)	1 mm (0.0 inches)	39%	extreme
September Weather	22°C (73°F)	2 mm (0.1 inches)	48%	very high
October Weather	20°C (68°F)	10 mm (0.4 inches)	59%	high
November Weather	16°C (62°F)	19 mm (0.7 inches)	72%	moderate
December Weather	12°C (55°F)	86 mm (3.4 inches)	76%	moderate