March Weather in Port Isabel, United States

Last updated: June 24, 2025

In Port Isabel, United States, the average temperature in March hovers around 20°C (69°F), with a minimum of 9°C (48°F) and a maximum of 26°C (79°F). Be prepared for occasional rain, as the region experiences approximately 42 mm (1.6 in) of precipitation over 7 days. The air tends to be quite humid, with an average humidity level of 81%, making it feel a bit warmer than the actual temperature.

March Temperature in Port Isabel

In March in Port Isabel, the average temperature is 20°C (69°F). The maximum can reach 26°C (79°F), and the minimum can be as low as 9°C (48°F). This pleasant climate makes Port Isabel an ideal destination for outdoor activities and exploration.

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

The chart illustrates March 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, March typically has an average temperature of 20°C (69°F), with highs reaching up to 26°C (79°F) and lows dropping to around 9°C (48°F).

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

March Precipitation in Port Isabel

In Port Isabel in March, the total precipitation amount is 42 mm (1.6 in) accumulated over a span of 7 days.

March Precipitation Trends in Port Isabel

The chart displays monthly precipitation patterns in Port Isabel, with values for each month alongside March’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how March’s conditions compare to those of other months. In Port Isabel, March typically receives around 42 mm (1.6 inches) of precipitation spread over approximately 7 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

March Humidity in Port Isabel

In Port Isabel in March, humidity is 81%. With an average temperature of 20°C (69°F), this humidity feels like a thick blanket embracing you, making travel a bit uncomfortable and sticky.

March Average Humidity in Port Isabel

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

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

March UV Index in Port Isabel

In Port Isabel in March, 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 Port Isabel.

Maximum UV Index Levels in Port Isabel for March

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

Data source: Port Isabel March 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 March 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 March’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 March’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