April Weather in Castro Marim, Portugal

Last updated: August 27, 2025

In April, the average temperature in Castro Marim, Portugal hovers around 16°C (61°F), with temperatures ranging from a cool 8°C (46°F) to a warm 28°C (82°F). Expect about 55 mm (2.2 in) of precipitation spread over 10 days, and a comfortable average humidity of 69%.

April Temperature in Castro Marim

In April in Castro Marim, the average temperature is 16°C (61°F). Maximum temperatures can reach 28°C (82°F), while minimum temperatures can drop to as low as 8°C (46°F). This mild climate makes Castro Marim a perfect destination for travelers looking to enjoy comfortable weather and outdoor activities.

April Weather in Castro Marim: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in Castro Marim, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Castro Marim, April typically has an average temperature of 16°C (61°F), with highs reaching up to 28°C (82°F) and lows dropping to around 8°C (46°F).

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

April Precipitation in Castro Marim

In Castro Marim in April, the precipitation amount is 55 mm (2.2 in) spread over a duration of 10 days.

April Precipitation Trends in Castro Marim

The chart displays monthly precipitation patterns in Castro Marim, 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 Castro Marim, April typically receives around 55 mm (2.2 inches) of precipitation spread over approximately 10 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

April Humidity in Castro Marim

In Castro Marim in April, humidity is 69%. With an average temperature of 16°C (61°F), this humidity feels like a mild, humid embrace, making travel enjoyable yet requiring a light layer for comfort while exploring.

April Average Humidity in Castro Marim

This chart illustrates the average monthly humidity levels in Castro Marim, 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 Castro Marim is approximately 69%, 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 Castro Marim

In Castro Marim in April, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Castro Marim.

Maximum UV Index Levels in Castro Marim for April

The chart shows the monthly maximum UV Index (UVI) for Castro Marim 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 Castro Marim typically reaches 9, which falls under the very high exposure category.

Data source: Castro Marim 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 Castro Marim Compares to Other Months

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

This table compares monthly weather conditions in Castro Marim, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	11°C (52°F)	22 mm (0.9 inches)	80%	moderate
February Weather	13°C (55°F)	38 mm (1.5 inches)	73%	moderate
March Weather	14°C (58°F)	54 mm (2.1 inches)	71%	high
April Weather	16°C (61°F)	55 mm (2.2 inches)	69%	very high
May Weather	20°C (68°F)	19 mm (0.8 inches)	69%	very high
June Weather	22°C (73°F)	5 mm (0.2 inches)	67%	extreme
July Weather	25°C (78°F)	2 mm (0.1 inches)	69%	very high
August Weather	26°C (79°F)	1 mm (0.0 inches)	68%	very high
September Weather	24°C (75°F)	19 mm (0.8 inches)	71%	very high
October Weather	20°C (68°F)	25 mm (1.0 inches)	75%	high
November Weather	15°C (59°F)	54 mm (2.1 inches)	78%	moderate
December Weather	13°C (55°F)	37 mm (1.4 inches)	81%	moderate