March Weather in Arroyo Grande, United States

Last updated: June 24, 2025

In March, the average temperature in Arroyo Grande, United States hovers around 12°C (54°F). Expect temperatures to range from a minimum of 5°C (40°F) to a pleasant maximum of 22°C (72°F). This month also brings about 88 mm (3.5 inches) of precipitation, typically falling over 10 days, contributing to an average humidity level of 80%.

March Temperature in Arroyo Grande

In March in Arroyo Grande, the average temperature is 12°C (54°F). Maximums can reach 22°C (72°F), and minimums can drop to as low as 5°C (40°F). Be sure to pack layers for your trip to fully enjoy the varied weather!

March Weather in Arroyo Grande: Daily Temperature Highs, Lows, and Averages

The chart illustrates March temperature patterns in Arroyo Grande, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Arroyo Grande, March typically has an average temperature of 12°C (54°F), with highs reaching up to 22°C (72°F) and lows dropping to around 5°C (40°F).

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

March Precipitation in Arroyo Grande

In Arroyo Grande in March, the precipitation amount is 88 mm (3.5 in) spread over a duration of 10 days.

March Precipitation Trends in Arroyo Grande

The chart displays monthly precipitation patterns in Arroyo Grande, 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 Arroyo Grande, March typically receives around 88 mm (3.5 inches) of precipitation spread over approximately 10 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 Arroyo Grande

In Arroyo Grande in March, humidity is 80%. With an average temperature of 12°C (54°F), this humidity feels like a heavy blanket that wraps around you, making it feel much cooler and damp. Traveling in these conditions might leave you feeling chilly and slightly uncomfortable, as the moisture in the air clings to your skin and clothes, turning each step into a soggy endeavor.

March Average Humidity in Arroyo Grande

This chart illustrates the average monthly humidity levels in Arroyo Grande, 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 Arroyo Grande is approximately 80%, 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 Arroyo Grande

In Arroyo Grande 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 Arroyo Grande.

Maximum UV Index Levels in Arroyo Grande for March

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

Data source: Arroyo Grande 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 Arroyo Grande Compares to Other Months

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

This table compares monthly weather conditions in Arroyo Grande, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	12°C (54°F)	100 mm (3.9 inches)	80%	moderate
February Weather	12°C (53°F)	81 mm (3.2 inches)	83%	high
March Weather	12°C (54°F)	88 mm (3.5 inches)	80%	very high
April Weather	13°C (57°F)	24 mm (1.0 inches)	76%	very high
May Weather	14°C (58°F)	12 mm (0.5 inches)	75%	extreme
June Weather	16°C (61°F)	2 mm (0.1 inches)	74%	extreme
July Weather	18°C (64°F)	1 mm (0.0 inches)	75%	extreme
August Weather	18°C (65°F)	1 mm (0.0 inches)	72%	extreme
September Weather	18°C (64°F)	1 mm (0.1 inches)	70%	very high
October Weather	17°C (63°F)	10 mm (0.4 inches)	70%	high
November Weather	14°C (58°F)	33 mm (1.3 inches)	74%	moderate
December Weather	12°C (54°F)	72 mm (2.8 inches)	76%	moderate