May Weather in Porterville, United States

Last updated: June 24, 2025

In May, the average temperature in Porterville, United States hovers around 21°C (69°F), providing a comfortable climate for outdoor activities. Temperatures can range from a cool 7°C (44°F) to a scorching 38°C (101°F). Expect a total precipitation of 26 mm (1.0 in) spread over about 3 days, along with an average humidity of 57% that may add a touch of warmth to the atmosphere.

May Temperature in Porterville

In May in Porterville, the average temperature is 21°C (69°F). The maximum can reach 38°C (101°F), while the minimum can drop to as low as 7°C (44°F). This makes Porterville a great destination for travelers looking to enjoy warm weather with the possibility of cooler evenings.

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

The chart illustrates May temperature patterns in Porterville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Porterville, May typically has an average temperature of 21°C (69°F), with highs reaching up to 38°C (101°F) and lows dropping to around 7°C (44°F).

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

May Precipitation in Porterville

In Porterville in May, the precipitation amount is 26 mm (1.0 in) recorded over the course of 3 days.

May Precipitation Trends in Porterville

The chart displays monthly precipitation patterns in Porterville, 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 Porterville, May typically receives around 26 mm (1.0 inches) of precipitation spread over approximately 3 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 Porterville

In Porterville in May humidity is 57%. With an average temperature of 21°C (69°F), this humidity feels like a warm, comfortable embrace, making it ideal for exploring the sights and enjoying outdoor activities without feeling overly sticky or uncomfortable.

May Average Humidity in Porterville

This chart illustrates the average monthly humidity levels in Porterville, 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 Porterville is approximately 57%, 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 Porterville

In Porterville in May, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Porterville.

Maximum UV Index Levels in Porterville for May

The chart shows the monthly maximum UV Index (UVI) for Porterville 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 Porterville typically reaches 10, which falls under the very high exposure category.

Data source: Porterville 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 Porterville Compares to Other Months

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

This table compares monthly weather conditions in Porterville, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	10°C (51°F)	76 mm (3.0 inches)	78%	moderate
February Weather	11°C (52°F)	78 mm (3.1 inches)	82%	moderate
March Weather	13°C (56°F)	108 mm (4.3 inches)	75%	very high
April Weather	17°C (63°F)	43 mm (1.7 inches)	68%	very high
May Weather	21°C (69°F)	26 mm (1.0 inches)	57%	very high
June Weather	26°C (80°F)	1 mm (0.0 inches)	52%	extreme
July Weather	30°C (87°F)	0 mm (0.0 inches)	46%	extreme
August Weather	30°C (86°F)	0 mm (0.0 inches)	39%	very high
September Weather	26°C (79°F)	2 mm (0.1 inches)	48%	very high
October Weather	20°C (68°F)	11 mm (0.4 inches)	59%	high
November Weather	14°C (58°F)	37 mm (1.5 inches)	72%	moderate
December Weather	10°C (51°F)	75 mm (2.9 inches)	76%	moderate