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April Weather in Walnut Creek, United States

Last updated: June 24, 2025

In April, the average temperature in Walnut Creek, United States hovers around 11°C (51°F). While you might enjoy pleasant days, be prepared for chilly nights, with temperatures plummeting to a minimum of -5°C (24°F), and occasionally reaching a warm 29°C (84°F). Expect about 129 mm (5.1 in) of precipitation spread across 14 days, accompanied by an average humidity level of 87%, making it a month where you'll definitely want to pack your umbrella!

April Temperature in Walnut Creek

In April in Walnut Creek, the average temperature is 11°C (51°F). The maximum can reach 29°C (84°F), and the minimum can be as low as -5°C (24°F). Travelers should be prepared for a wide range of temperatures, ensuring they pack layers to stay comfortable.

April Weather in Walnut Creek: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in Walnut Creek, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Walnut Creek, April typically has an average temperature of 11°C (51°F), with highs reaching up to 29°C (84°F) and lows dropping to around -5°C (24°F).
JanFebMarAprMayJunJulAugSepOctNovDec303441516371757368574236
Data source: Temperature data for Walnut Creek 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 Walnut Creek

In Walnut Creek in April, the precipitation amount is 129 mm (5.1 in) over the course of 14 days.

April Precipitation Trends in Walnut Creek

The chart displays monthly precipitation patterns in Walnut Creek, 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 Walnut Creek, April typically receives around 129 mm (5.1 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec89106103129123126119861051099495
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Walnut Creek

In Walnut Creek in April humidity is 87%. With an average temperature of 11°C (51°F), this humidity feels like a damp chill wrapping around you, making outdoor excursions a bit uncomfortable as the air feels thick and heavy, urging you to seek shelter more often than not.

April Average Humidity in Walnut Creek

This chart illustrates the average monthly humidity levels in Walnut Creek, 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 Walnut Creek is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%88%87%87%81%83%82%76%77%82%89%86%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Walnut Creek

In Walnut Creek 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 Walnut Creek.

Maximum UV Index Levels in Walnut Creek for April

The chart shows the monthly maximum UV Index (UVI) for Walnut Creek 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 Walnut Creek typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098642
Data source: Walnut Creek 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 Walnut Creek Compares to Other Months

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

This table compares monthly weather conditions in Walnut Creek, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (31°F)88 mm (3.5 inches)88%moderate
February Weather1°C (34°F)106 mm (4.2 inches)88%moderate
March Weather5°C (42°F)103 mm (4.1 inches)87%high
April Weather11°C (51°F)129 mm (5.1 inches)87%very high
May Weather17°C (63°F)122 mm (4.8 inches)81%very high
June Weather22°C (71°F)126 mm (5.0 inches)83%very high
July Weather24°C (76°F)118 mm (4.7 inches)82%very high
August Weather23°C (73°F)86 mm (3.4 inches)76%very high
September Weather20°C (68°F)105 mm (4.2 inches)77%very high
October Weather14°C (57°F)109 mm (4.3 inches)82%high
November Weather5°C (42°F)94 mm (3.7 inches)89%moderate
December Weather2°C (36°F)95 mm (3.8 inches)86%low

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