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April Weather in California, United States

Last updated: June 24, 2025

In April, the average temperature in California, United States hovers around 11°C (53°F), making it a mild experience. However, be prepared for temperature fluctuations, with a minimum of -5°C (24°F) and a maximum of 29°C (84°F). Precipitation can be significant, with 129 mm (5.1 in) expected over 15 days, and an average humidity of 86% can make the air feel a bit damp. Plan accordingly to enjoy your stay!

April Temperature in California

In April in California, the average temperature is 11°C (53°F). Maximums can reach 29°C (84°F), while minimums can drop as low as -5°C (24°F). Be prepared for a wide range of temperatures during your travels.

April Weather in California: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in California, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In California, April typically has an average temperature of 11°C (53°F), with highs reaching up to 29°C (84°F) and lows dropping to around -5°C (24°F).
JanFebMarAprMayJunJulAugSepOctNovDec323643536370757368584337
Data source: Temperature data for California 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 California

In California in April, the precipitation amount is 129 mm (5.1 in) over a span of 15 days.

April Precipitation Trends in California

The chart displays monthly precipitation patterns in California, 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 California, April typically receives around 129 mm (5.1 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec8712411712914917215311012512186116
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in California

In California in April, humidity is 86%. With an average temperature of 11°C (53°F), this humidity feels like a heavy blanket that dampens the air, making traveling uncomfortable and a bit stifling.

April Average Humidity in California

This chart illustrates the average monthly humidity levels in California, 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 California is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%88%87%82%84%82%73%74%81%89%86%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in California

In California in April, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in California.

Maximum UV Index Levels in California for April

The chart shows the monthly maximum UV Index (UVI) for California 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 California typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910101098643
Data source: California 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 California Compares to Other Months

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

This table compares monthly weather conditions in California, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (33°F)87 mm (3.4 inches)88%moderate
February Weather2°C (37°F)124 mm (4.9 inches)88%moderate
March Weather6°C (43°F)117 mm (4.6 inches)88%high
April Weather11°C (53°F)129 mm (5.1 inches)86%very high
May Weather17°C (63°F)149 mm (5.9 inches)82%very high
June Weather21°C (70°F)172 mm (6.8 inches)84%very high
July Weather24°C (75°F)153 mm (6.0 inches)82%very high
August Weather23°C (73°F)110 mm (4.3 inches)73%very high
September Weather20°C (68°F)125 mm (4.9 inches)73%very high
October Weather14°C (58°F)121 mm (4.8 inches)81%high
November Weather6°C (43°F)86 mm (3.4 inches)89%moderate
December Weather3°C (38°F)116 mm (4.6 inches)86%moderate

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