April Weather in San Diego, Mexico

Last updated: August 27, 2025

The average temperature in San Diego, Mexico during April is a pleasant 23°C (74°F). Expect a range with minimum temperatures dipping to 10°C (51°F) and maximum highs soaring to 39°C (102°F). Throughout the month, anticipate 22 mm (0.8 in) of precipitation spread across 6 days and enjoy a comfortable average humidity of 58%.

April Temperature in San Diego

In April in San Diego, the average temperature is 23°C (74°F). Maximums can reach 39°C (102°F) and minimums can be as low as 10°C (51°F). This makes San Diego a perfect destination for travelers seeking warm weather, but it's wise to pack for both heat and cooler evenings.

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

The chart illustrates April 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, April typically has an average temperature of 23°C (74°F), with highs reaching up to 39°C (102°F) and lows dropping to around 10°C (51°F).

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

April Precipitation in San Diego

In San Diego in April, the total precipitation amount is 22 mm (0.8 in) over the course of 6 days.

April Precipitation Trends in San Diego

The chart displays monthly precipitation patterns in San Diego, with values for each month alongside April’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April’s conditions compare to those of other months. In San Diego, April typically receives around 22 mm (0.8 inches) of precipitation spread over approximately 6 days.

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

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Millimeters (mm) Inches (in)

April Humidity in San Diego

In San Diego in April, humidity is 58%. With an average temperature of 23°C (74°F), this humidity feels like a warm, inviting embrace, making traveling enjoyable yet slightly sticky.

April Average Humidity in San Diego

This chart illustrates the average monthly humidity levels in San Diego, with April’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In April, average humidity in San Diego is approximately 58%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in San Diego

In San Diego in April, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in San Diego, you can check here.

Maximum UV Index Levels in San Diego for April

The chart shows the monthly maximum UV Index (UVI) for San Diego in April, 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 April, the maximum UV index in San Diego typically reaches 14, which falls under the extreme exposure category.

Data source: San Diego April 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 April 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 April’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 April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	15°C (60°F)	16 mm (0.6 inches)	74%	very high
February Weather	18°C (64°F)	20 mm (0.8 inches)	65%	extreme
March Weather	20°C (69°F)	23 mm (0.9 inches)	58%	extreme
April Weather	23°C (74°F)	22 mm (0.8 inches)	58%	extreme
May Weather	25°C (77°F)	59 mm (2.3 inches)	67%	extreme
June Weather	25°C (76°F)	100 mm (4.0 inches)	76%	extreme
July Weather	24°C (76°F)	85 mm (3.3 inches)	67%	extreme
August Weather	24°C (76°F)	71 mm (2.8 inches)	68%	extreme
September Weather	23°C (74°F)	120 mm (4.7 inches)	81%	extreme
October Weather	21°C (70°F)	121 mm (4.8 inches)	83%	extreme
November Weather	18°C (65°F)	28 mm (1.1 inches)	84%	very high
December Weather	16°C (61°F)	12 mm (0.5 inches)	81%	high