April Weather in Port Arthur, United States

Last updated: June 24, 2025

In Port Arthur, United States, the average temperature in April hovers around 21°C (69°F), creating a pleasant climate for outdoor activities. Temperatures can range from a cool 4°C (40°F) to a warm 30°C (86°F), offering a delightful variety for every preference. Expect about 125 mm (4.9 in) of precipitation spread over 12 days, contributing to an average humidity level of 81% that adds a touch of warmth and vibrancy to the air.

April Temperature in Port Arthur

In April in Port Arthur, the average temperature is 21°C (69°F). Maximum temps can reach 30°C (86°F), while the minimum can drop as low as 4°C (40°F). This mild climate makes it an ideal time for travelers to explore the outdoor attractions and enjoy various activities.

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

The chart illustrates April temperature patterns in Port Arthur, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Port Arthur, April typically has an average temperature of 21°C (69°F), with highs reaching up to 30°C (86°F) and lows dropping to around 4°C (40°F).

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

April Precipitation in Port Arthur

In Port Arthur in April, the total precipitation amount is 125 mm (4.9 in) spread over 12 days.

April Precipitation Trends in Port Arthur

The chart displays monthly precipitation patterns in Port Arthur, 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 Arthur, April typically receives around 125 mm (4.9 inches) of precipitation spread over approximately 12 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 Arthur

In Port Arthur in April humidity is 81%. With an average temperature of 21°C (69°F), this humidity feels like a warm, enveloping blanket that's both heavy and sticky, making outdoor activities feel more strenuous and travel slightly uncomfortable.

April Average Humidity in Port Arthur

This chart illustrates the average monthly humidity levels in Port Arthur, 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 Arthur is approximately 81%, 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 Arthur

In Port Arthur 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 Arthur.

Maximum UV Index Levels in Port Arthur for April

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

Data source: Port Arthur 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 Arthur Compares to Other Months

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

This table compares monthly weather conditions in Port Arthur, 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)	98 mm (3.8 inches)	79%	moderate
February Weather	14°C (58°F)	90 mm (3.5 inches)	80%	very high
March Weather	18°C (65°F)	76 mm (3.0 inches)	78%	very high
April Weather	21°C (69°F)	125 mm (4.9 inches)	81%	extreme
May Weather	25°C (77°F)	189 mm (7.4 inches)	79%	extreme
June Weather	27°C (82°F)	181 mm (7.1 inches)	75%	extreme
July Weather	28°C (83°F)	153 mm (6.0 inches)	74%	extreme
August Weather	28°C (83°F)	228 mm (9.0 inches)	73%	extreme
September Weather	27°C (80°F)	202 mm (8.0 inches)	75%	very high
October Weather	22°C (73°F)	143 mm (5.6 inches)	75%	very high
November Weather	16°C (62°F)	74 mm (2.9 inches)	79%	high
December Weather	14°C (58°F)	140 mm (5.5 inches)	83%	moderate