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April Weather in Walnut, United States

Last updated: June 24, 2025

In April, the average temperature in Walnut, United States hovers around 9°C (49°F), offering a refreshing climate. While you might experience minimum temperatures dropping to -11°C (13°F), sunny days can also bring highs of 31°C (88°F). Expect about 57 mm (2.3 in) of precipitation spread across 11 days this month, contributing to an average humidity of 74%. Perfect for those who enjoy the nuances of seasonal weather!

April Temperature in Walnut

In April in Walnut, the average temperature is 9°C (49°F). Maximums can reach 31°C (88°F), while minimums can drop to as low as -11°C (13°F). Be prepared for a wide range of temperatures when planning your trip.

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

The chart illustrates April temperature patterns in Walnut, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Walnut, April typically has an average temperature of 9°C (49°F), with highs reaching up to 31°C (88°F) and lows dropping to around -11°C (13°F).
JanFebMarAprMayJunJulAugSepOctNovDec232440496274777368523930
Data source: Temperature data for Walnut 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

In Walnut in April, the total precipitation amount is 57 mm (2.3 in) over the course of 11 days.

April Precipitation Trends in Walnut

The chart displays monthly precipitation patterns in Walnut, 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, April typically receives around 57 mm (2.3 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec3036865715710968108981283436
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Walnut

In Walnut in April humidity is 74%. With an average temperature of 9°C (49°F), this humidity feels like a chilly embrace that can make outdoor activities somewhat uncomfortable; travelers may find themselves needing to dress in layers to stay warm while also coping with the dampness in the air.

April Average Humidity in Walnut

This chart illustrates the average monthly humidity levels in Walnut, 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 is approximately 74%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%80%73%75%78%82%83%81%75%75%82%83%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Walnut

In Walnut in April, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Walnut.

Maximum UV Index Levels in Walnut for April

The chart shows the monthly maximum UV Index (UVI) for Walnut 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 typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356810111098643
Data source: Walnut 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 Compares to Other Months

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

This table compares monthly weather conditions in Walnut, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-5°C (24°F)30 mm (1.2 inches)76%moderate
February Weather-4°C (24°F)36 mm (1.4 inches)80%moderate
March Weather4°C (40°F)86 mm (3.4 inches)73%high
April Weather9°C (49°F)57 mm (2.3 inches)74%very high
May Weather17°C (62°F)157 mm (6.2 inches)78%very high
June Weather24°C (75°F)109 mm (4.3 inches)82%extreme
July Weather25°C (77°F)68 mm (2.7 inches)83%very high
August Weather23°C (74°F)108 mm (4.3 inches)80%very high
September Weather20°C (69°F)98 mm (3.8 inches)75%very high
October Weather11°C (52°F)128 mm (5.0 inches)75%high
November Weather4°C (39°F)34 mm (1.3 inches)82%moderate
December Weather-1°C (31°F)36 mm (1.4 inches)83%moderate

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