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April Weather in National City, United States

Last updated: June 24, 2025

In April, the average temperature in National City, United States hovers around 16°C (61°F). However, temperatures can vary significantly, ranging from a minimum of 8°C (47°F) to a maximum of 35°C (95°F). During this month, expect a total precipitation of 24 mm (0.9 in) over 3 days, alongside an average humidity of 56%.

April Temperature in National City

In April in National City, the average temperature is 16°C (61°F). Maximums can reach 35°C (95°F) and minimums can be as low as 8°C (47°F). It's advisable to pack layers to accommodate the variable weather, ensuring you're prepared for both warm days and cooler evenings.

April Weather in National City: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in National City, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In National City, April typically has an average temperature of 16°C (61°F), with highs reaching up to 35°C (95°F) and lows dropping to around 8°C (47°F).
JanFebMarAprMayJunJulAugSepOctNovDec565557616367727372686256
Data source: Temperature data for National City 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 National City

In National City in April, the precipitation amount is 24 mm (0.9 in) over a span of 3 days.

April Precipitation Trends in National City

The chart displays monthly precipitation patterns in National City, 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 National City, April typically receives around 24 mm (0.9 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec56685124222314142965
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in National City

In National City in April, humidity is 56%. With an average temperature of 16°C (61°F), this humidity feels like a pleasant embrace, making it an ideal time for traveling as the mild conditions invite leisurely strolls and outdoor exploration.

April Average Humidity in National City

This chart illustrates the average monthly humidity levels in National City, 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 National City is approximately 56%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec72%77%67%56%46%48%46%42%52%58%66%74%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in National City

In National City in April, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in National City.

Maximum UV Index Levels in National City for April

The chart shows the monthly maximum UV Index (UVI) for National City 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 National City typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101111111010754
Data source: National City 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 National City Compares to Other Months

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

This table compares monthly weather conditions in National City, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather13°C (56°F)56 mm (2.2 inches)72%moderate
February Weather13°C (56°F)68 mm (2.7 inches)77%high
March Weather14°C (57°F)51 mm (2.0 inches)67%very high
April Weather16°C (61°F)24 mm (0.9 inches)56%very high
May Weather17°C (63°F)21 mm (0.8 inches)46%extreme
June Weather19°C (67°F)2 mm (0.1 inches)48%extreme
July Weather22°C (72°F)3 mm (0.1 inches)46%extreme
August Weather23°C (74°F)1 mm (0.1 inches)42%very high
September Weather22°C (72°F)4 mm (0.1 inches)52%very high
October Weather20°C (68°F)14 mm (0.6 inches)58%high
November Weather17°C (62°F)29 mm (1.1 inches)66%moderate
December Weather14°C (57°F)65 mm (2.5 inches)74%moderate

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