April Weather in Port Isabel, United States

Last updated: June 24, 2025

In Port Isabel, United States, the average temperature in April is a pleasant 23°C (74°F). Visitors can expect a comfortable range, with minimums dipping to 12°C (54°F) and maximums reaching up to 29°C (84°F). However, be prepared for some rain, as 26 mm (1.0 in) of precipitation typically falls over 5 days during this month. With an average humidity of 85%, the air feels quite moist, making for a lush and vibrant atmosphere.

April Temperature in Port Isabel

In April in Port Isabel, the average temperature is 23°C (74°F). Maximums can reach 29°C (84°F) and minimums can be as low as 12°C (54°F). This pleasant climate makes Port Isabel an ideal destination for travelers seeking comfortable weather and outdoor activities.

April Weather in Port Isabel: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in Port Isabel, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Port Isabel, April typically has an average temperature of 23°C (74°F), with highs reaching up to 29°C (84°F) and lows dropping to around 12°C (54°F).

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

April Precipitation in Port Isabel

In Port Isabel in April, the precipitation amount is 26 mm (1.0 in) over the course of 5 days.

April Precipitation Trends in Port Isabel

The chart displays monthly precipitation patterns in Port Isabel, 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 Port Isabel, April typically receives around 26 mm (1.0 inches) of precipitation spread over approximately 5 days.

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

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Millimeters (mm) Inches (in)

April Humidity in Port Isabel

In Port Isabel in April humidity is 85%. With an average temperature of 23°C (74°F), this humidity feels like a thick, steamy blanket wrapping around you, making outdoor activities draining and sweaty, and leaving you longing for a cool breeze or a refreshing drink to ease the discomfort while traveling.

April Average Humidity in Port Isabel

This chart illustrates the average monthly humidity levels in Port Isabel, 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 Port Isabel is approximately 85%, 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 Port Isabel

In Port Isabel 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 Port Isabel.

Maximum UV Index Levels in Port Isabel for April

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

Data source: Port Isabel 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 Port Isabel Compares to Other Months

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

This table compares monthly weather conditions in Port Isabel, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	18°C (64°F)	47 mm (1.9 inches)	78%	high
February Weather	18°C (65°F)	36 mm (1.4 inches)	81%	very high
March Weather	20°C (69°F)	42 mm (1.6 inches)	81%	very high
April Weather	23°C (74°F)	26 mm (1.0 inches)	85%	extreme
May Weather	26°C (79°F)	68 mm (2.7 inches)	83%	extreme
June Weather	28°C (82°F)	87 mm (3.4 inches)	79%	extreme
July Weather	28°C (83°F)	125 mm (4.9 inches)	79%	extreme
August Weather	29°C (84°F)	32 mm (1.2 inches)	77%	extreme
September Weather	28°C (82°F)	136 mm (5.3 inches)	77%	extreme
October Weather	26°C (79°F)	94 mm (3.7 inches)	76%	very high
November Weather	22°C (72°F)	71 mm (2.8 inches)	79%	high
December Weather	19°C (67°F)	43 mm (1.7 inches)	79%	high