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April Weather in San Diego, Mexico

Last updated: August 27, 2025

In April, the average temperature in San Diego, Mexico hovers around 27°C (81°F). Expect a range that can dip to a chilly 14°C (58°F) and soar up to a scorching 43°C (109°F). During this time, anticipate about 56 mm (2.2 in) of precipitation spread over 7 days. The air carries an average humidity of 80%, making it feel quite sultry overall.

April Temperature in San Diego

In April in San Diego, the average temperature is 27°C (81°F). Maximum temperatures can reach 43°C (109°F), while minimum temperatures can drop as low as 14°C (58°F). Travelers should prepare for a warm climate with the possibility of significant temperature variation throughout the day.

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 27°C (81°F), with highs reaching up to 43°C (109°F) and lows dropping to around 14°C (58°F).
JanFebMarAprMayJunJulAugSepOctNovDec677075818584848582797268
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.

April Precipitation in San Diego

In San Diego in April, the total precipitation amount is 56 mm (2.2 in) over a period of 7 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 56 mm (2.2 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec573141561061531141161672346326
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in San Diego

In San Diego in April humidity is 80%. With an average temperature of 27°C (81°F), this humidity feels like a warm, enveloping blanket that clings to your skin, making travel tiring as sweat beads form quickly and the air feels thick and heavy.

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 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%86%83%80%82%79%72%74%84%92%91%91%
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 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in San Diego.

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 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec710121212131312121187
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.
 TemperaturePrecipitationHumidityUV
January Weather19°C (67°F)57 mm (2.3 inches)88%high
February Weather21°C (70°F)31 mm (1.2 inches)86%very high
March Weather24°C (75°F)41 mm (1.6 inches)83%extreme
April Weather27°C (81°F)56 mm (2.2 inches)80%extreme
May Weather29°C (85°F)106 mm (4.2 inches)82%extreme
June Weather29°C (84°F)153 mm (6.0 inches)79%extreme
July Weather29°C (84°F)114 mm (4.5 inches)72%extreme
August Weather29°C (85°F)116 mm (4.6 inches)74%extreme
September Weather28°C (83°F)167 mm (6.6 inches)84%extreme
October Weather26°C (79°F)234 mm (9.2 inches)92%extreme
November Weather22°C (73°F)62 mm (2.5 inches)91%very high
December Weather20°C (69°F)26 mm (1.0 inches)91%high

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