May Weather in Castroville, United States

Last updated: June 24, 2025

In May, the average temperature in Castroville, United States reaches a warm 26°C (79°F), with extremes ranging from a cool 10°C (51°F) to a scorching 40°C (104°F). Visitors can expect 109 mm (4.3 in) of precipitation spread over 13 days, contributing to an average humidity of 81%. Be prepared for a tropical experience!

May Temperature in Castroville

In May in Castroville, the average temperature is 26°C (79°F). The maximum can reach 40°C (104°F) and the minimum can be as low as 10°C (51°F). Travelers should pack a variety of clothing to comfortably adapt to both warm and cooler temperatures during their visit.

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

The chart illustrates May 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, May typically has an average temperature of 26°C (79°F), with highs reaching up to 40°C (104°F) and lows dropping to around 10°C (51°F).

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

May Precipitation in Castroville

In Castroville in May, the precipitation amount is 109 mm (4.3 in), which occurs during 13 days.

May Precipitation Trends in Castroville

The chart displays monthly precipitation patterns in Castroville, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Castroville, May typically receives around 109 mm (4.3 inches) of precipitation spread over approximately 13 days.

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

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Millimeters (mm) Inches (in)

May Humidity in Castroville

In Castroville in May, humidity is 81%. With an average temperature of 26°C (79°F), this humidity feels like a warm, heavy blanket wrapping around you, making outdoor adventures stickier and more draining, yet still vibrant with life—perfect for exploring local culture, but you'll want to take frequent breaks and stay hydrated.

May Average Humidity in Castroville

This chart illustrates the average monthly humidity levels in Castroville, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Castroville is approximately 81%, offering insight into how humid the weather typically is during this month.

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

May UV Index in Castroville

In Castroville in May, 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 May

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

Data source: Castroville May 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 May 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 May’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 May’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