March Weather in Fontana, United States

Last updated: June 24, 2025

In Fontana, United States, the average temperature in March hovers around 14°C (57°F), with fluctuations ranging from a cool 1°C (34°F) to a warm 30°C (87°F). During this month, you can expect 95 mm (3.7 in) of precipitation spread over 11 days, paired with an average humidity of 75%. Whether you're planning a visit or simply curious about the weather, this blend of temperatures and moisture creates a unique climate experience!

March Temperature in Fontana

In March in Fontana, the average temperature is 14°C (57°F). Maximums can reach 30°C (87°F), and minimums can go as low as 1°C (34°F). This makes it an ideal time for travelers to pack layers, allowing for comfort from warm afternoons to cooler evenings.

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

The chart illustrates March temperature patterns in Fontana, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Fontana, March typically has an average temperature of 14°C (57°F), with highs reaching up to 30°C (87°F) and lows dropping to around 1°C (34°F).

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

March Precipitation in Fontana

In Fontana in March, the total precipitation amount is 95 mm (3.7 in) spread over 11 days.

March Precipitation Trends in Fontana

The chart displays monthly precipitation patterns in Fontana, 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 Fontana, March typically receives around 95 mm (3.7 inches) of precipitation spread over approximately 11 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 Fontana

In Fontana 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 Fontana

This chart illustrates the average monthly humidity levels in Fontana, 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 Fontana 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 Fontana

In Fontana 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 Fontana.

Maximum UV Index Levels in Fontana for March

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

Data source: Fontana 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 Fontana Compares to Other Months

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

This table compares monthly weather conditions in Fontana, 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)	87 mm (3.4 inches)	74%	moderate
February Weather	12°C (54°F)	84 mm (3.3 inches)	79%	high
March Weather	14°C (57°F)	95 mm (3.7 inches)	75%	very high
April Weather	17°C (63°F)	35 mm (1.4 inches)	70%	very high
May Weather	18°C (66°F)	23 mm (0.9 inches)	70%	very high
June Weather	23°C (73°F)	3 mm (0.1 inches)	72%	extreme
July Weather	26°C (80°F)	1 mm (0.1 inches)	73%	extreme
August Weather	26°C (80°F)	2 mm (0.1 inches)	69%	very high
September Weather	24°C (76°F)	5 mm (0.2 inches)	68%	very high
October Weather	20°C (69°F)	15 mm (0.6 inches)	67%	high
November Weather	16°C (61°F)	35 mm (1.4 inches)	68%	moderate
December Weather	12°C (54°F)	87 mm (3.4 inches)	71%	moderate