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March Weather in Fountain Valley, United States

Last updated: June 24, 2025

In March, the average temperature in Fountain Valley, United States sits at a comfortable 15°C (60°F). Expect a minimum of 7°C (44°F) and a pleasant maximum of 27°C (81°F). Be prepared for precipitation totaling 55 mm (2.2 in) over 8 days, with the average humidity hovering around 75%.

March Temperature in Fountain Valley

In March in Fountain Valley, the average temperature is 15°C (60°F). The maximum can reach 27°C (81°F), and the minimum can be as low as 7°C (44°F). Pack layers for your trip to Fountain Valley to comfortably enjoy the varying temperatures.

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

The chart illustrates March temperature patterns in Fountain Valley, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Fountain Valley, March typically has an average temperature of 15°C (60°F), with highs reaching up to 27°C (81°F) and lows dropping to around 7°C (44°F).
JanFebMarAprMayJunJulAugSepOctNovDec575759636467727372696357
Data source: Temperature data for Fountain Valley generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

March Precipitation in Fountain Valley

In Fountain Valley in March, the precipitation amount is 55 mm (2.2 in) over the course of 8 days.

March Precipitation Trends in Fountain Valley

The chart displays monthly precipitation patterns in Fountain 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 Fountain Valley, March typically receives around 55 mm (2.2 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec6552552312432391868
Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.
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March Humidity in Fountain Valley

In Fountain Valley in March, humidity is 75%. With an average temperature of 15°C (60°F), this humidity feels like a warm, heavy blanket wrapping around you, making outdoor activities slightly uncomfortable and requiring extra hydration while exploring the sights.

March Average Humidity in Fountain Valley

This chart illustrates the average monthly humidity levels in Fountain 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 Fountain Valley is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec74%79%75%71%70%72%73%69%68%67%68%71%
Data source: Humidity data for March generated using information from the Copernicus Climate Change Service.

March UV Index in Fountain Valley

In Fountain 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 Fountain Valley.

Maximum UV Index Levels in Fountain Valley for March

The chart shows the monthly maximum UV Index (UVI) for Fountain 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 Fountain Valley typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101011111010754
Data source: Fountain 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 Fountain Valley Compares to Other Months

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

This table compares monthly weather conditions in Fountain Valley, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather14°C (57°F)65 mm (2.5 inches)74%moderate
February Weather14°C (58°F)52 mm (2.0 inches)79%high
March Weather15°C (60°F)55 mm (2.2 inches)75%very high
April Weather17°C (63°F)23 mm (0.9 inches)70%very high
May Weather18°C (64°F)12 mm (0.5 inches)70%very high
June Weather20°C (68°F)4 mm (0.2 inches)72%extreme
July Weather22°C (72°F)3 mm (0.1 inches)73%extreme
August Weather23°C (73°F)2 mm (0.1 inches)69%very high
September Weather22°C (72°F)3 mm (0.1 inches)68%very high
October Weather20°C (69°F)9 mm (0.4 inches)67%high
November Weather17°C (63°F)18 mm (0.7 inches)68%moderate
December Weather14°C (58°F)68 mm (2.7 inches)71%moderate

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