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March Weather in San Diego, Mexico

Last updated: August 27, 2025

In San Diego, Mexico, the average temperature in March hovers around 15°C (60°F). Expect a range from a cool 5°C (41°F) to a warm 27°C (82°F). With 37 mm (1.5 in) of precipitation spread over 10 days, you'll want to keep an umbrella handy. The air is typically quite humid, with an average humidity level of 75%.

March Temperature in San Diego

In March in San Diego, the average temperature is 15°C (60°F), with maximums reaching 27°C (82°F) and minimums dropping as low as 5°C (41°F). This mild climate makes San Diego an ideal destination for outdoor activities and exploring the local attractions.

March Weather in San Diego: Daily Temperature Highs, Lows, and Averages

The chart illustrates March temperature patterns in San Diego, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Diego, March typically has an average temperature of 15°C (60°F), with highs reaching up to 27°C (82°F) and lows dropping to around 5°C (41°F).
JanFebMarAprMayJunJulAugSepOctNovDec535659626361606060595654
Data source: Temperature data for San Diego 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 San Diego

In San Diego in March, the precipitation amount is 37 mm (1.5 in) spread over a duration of 10 days.

March Precipitation Trends in San Diego

The chart displays monthly precipitation patterns in San Diego, 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 San Diego, March typically receives around 37 mm (1.5 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec151737552004223254013622156014
Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.
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March Humidity in San Diego

In San Diego 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 San Diego

This chart illustrates the average monthly humidity levels in San Diego, 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 San Diego is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%78%75%71%77%76%68%70%82%91%89%88%
Data source: Humidity data for March generated using information from the Copernicus Climate Change Service.

March UV Index in San Diego

In San Diego in March, the maximum UV index reaches an alarming 15, which falls into the extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take precautions. For detailed information, you can check the Hourly UV Index in San Diego.

Maximum UV Index Levels in San Diego for March

The chart shows the monthly maximum UV Index (UVI) for San Diego 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 San Diego typically reaches 15, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec10121515151414141512109
Data source: San Diego 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 San Diego Compares to Other Months

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

This table compares monthly weather conditions in San Diego, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather12°C (54°F)15 mm (0.6 inches)84%very high
February Weather13°C (56°F)17 mm (0.7 inches)78%extreme
March Weather15°C (60°F)37 mm (1.5 inches)75%extreme
April Weather16°C (62°F)55 mm (2.2 inches)70%extreme
May Weather17°C (63°F)200 mm (7.9 inches)77%extreme
June Weather16°C (61°F)422 mm (16.6 inches)76%extreme
July Weather16°C (60°F)324 mm (12.8 inches)68%extreme
August Weather16°C (60°F)401 mm (15.8 inches)70%extreme
September Weather15°C (60°F)362 mm (14.2 inches)82%extreme
October Weather15°C (59°F)215 mm (8.5 inches)91%extreme
November Weather14°C (57°F)60 mm (2.4 inches)89%very high
December Weather12°C (54°F)14 mm (0.5 inches)88%very high

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