April Weather in Castroville, United States

Last updated: June 24, 2025

In Castroville, United States, the average temperature in April is a pleasant 22°C (72°F). However, temperatures can swing from a cool 4°C (39°F) to a scorching 38°C (100°F). Be prepared for some rain, as 61 mm (2.4 in) of precipitation typically falls over 6 days. The average humidity sits at a comfortable 76%, making it a perfect time to explore!

April Temperature in Castroville

In April in Castroville, the average temperature is 22°C (72°F). Maximums can reach 38°C (100°F), while minimums can drop as low as 4°C (39°F). Be sure to pack both light clothing for the warm days and warmer layers for the cooler nights when traveling.

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

The chart illustrates April temperature patterns in Castroville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Castroville, April typically has an average temperature of 22°C (72°F), with highs reaching up to 38°C (100°F) and lows dropping to around 4°C (39°F).

Data source: Temperature data for Castroville generated using information from the Copernicus Climate Change Service.

April Precipitation in Castroville

In Castroville in April, the total precipitation amount is 61 mm (2.4 in) spread over a period of 6 days.

April Precipitation Trends in Castroville

The chart displays monthly precipitation patterns in Castroville, 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 Castroville, April typically receives around 61 mm (2.4 inches) of precipitation spread over approximately 6 days.

Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

April Humidity in Castroville

In Castroville in April humidity is 76%. With an average temperature of 22°C (72°F), this humidity feels like a warm embrace, making travel slightly uncomfortable as you navigate through the thick, saturated air.

April Average Humidity in Castroville

This chart illustrates the average monthly humidity levels in Castroville, 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 Castroville is approximately 76%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Castroville

In Castroville in April, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Castroville.

Maximum UV Index Levels in Castroville for April

The chart shows the monthly maximum UV Index (UVI) for Castroville 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 Castroville typically reaches 11, which falls under the extreme exposure category.

Data source: Castroville 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 Castroville Compares to Other Months

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

This table compares monthly weather conditions in Castroville, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	12°C (54°F)	34 mm (1.3 inches)	79%	moderate
February Weather	13°C (57°F)	47 mm (1.8 inches)	79%	very high
March Weather	19°C (66°F)	50 mm (2.0 inches)	74%	very high
April Weather	22°C (72°F)	61 mm (2.4 inches)	76%	extreme
May Weather	26°C (79°F)	109 mm (4.3 inches)	81%	extreme
June Weather	29°C (84°F)	58 mm (2.3 inches)	76%	extreme
July Weather	30°C (86°F)	52 mm (2.0 inches)	66%	extreme
August Weather	31°C (87°F)	40 mm (1.6 inches)	58%	extreme
September Weather	28°C (82°F)	106 mm (4.2 inches)	65%	extreme
October Weather	23°C (73°F)	69 mm (2.7 inches)	74%	very high
November Weather	17°C (62°F)	40 mm (1.6 inches)	81%	high
December Weather	14°C (57°F)	46 mm (1.8 inches)	86%	moderate