April Weather in Lisbon, United States

Last updated: June 24, 2025

In April, the average temperature in Lisbon, United States hovers around 9°C (49°F), with variations ranging from a chilly -3°C (26°F) to a warm 28°C (83°F). Expect about 129 mm (5.1 in) of precipitation spread over 12 days, and be prepared for a relatively high average humidity of 79%. Stay comfortable and enjoy the atmosphere!

April Temperature in Lisbon

In April in Lisbon, the average temperature is 9°C (49°F). The maximum can reach 28°C (83°F), and the minimum can be as low as -3°C (26°F). It's essential to pack both warm and cool weather clothing when visiting, as temperatures can vary significantly throughout the day.

April Weather in Lisbon: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in Lisbon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lisbon, April typically has an average temperature of 9°C (49°F), with highs reaching up to 28°C (83°F) and lows dropping to around -3°C (26°F).

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

April Precipitation in Lisbon

In Lisbon in April, the total precipitation amount is 129 mm (5.1 in) over the course of 12 days.

April Precipitation Trends in Lisbon

The chart displays monthly precipitation patterns in Lisbon, 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 Lisbon, April typically receives around 129 mm (5.1 inches) of precipitation spread over approximately 12 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 Lisbon

In Lisbon in April humidity is 79%. With an average temperature of 9°C (49°F), this humidity feels like a damp chill that seeps into your bones, making it essential to dress in layers and carrying a light raincoat for a comfortable travel experience.

April Average Humidity in Lisbon

This chart illustrates the average monthly humidity levels in Lisbon, 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 Lisbon is approximately 79%, 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 Lisbon

In Lisbon in April, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Lisbon.

Maximum UV Index Levels in Lisbon for April

The chart shows the monthly maximum UV Index (UVI) for Lisbon 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 Lisbon typically reaches 8, which falls under the very high exposure category.

Data source: Lisbon 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 Lisbon Compares to Other Months

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

This table compares monthly weather conditions in Lisbon, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	0°C (33°F)	72 mm (2.8 inches)	84%	moderate
February Weather	1°C (35°F)	92 mm (3.6 inches)	84%	moderate
March Weather	4°C (40°F)	98 mm (3.8 inches)	82%	high
April Weather	9°C (49°F)	129 mm (5.1 inches)	79%	very high
May Weather	15°C (59°F)	109 mm (4.3 inches)	75%	very high
June Weather	20°C (68°F)	96 mm (3.8 inches)	78%	very high
July Weather	23°C (75°F)	149 mm (5.8 inches)	76%	very high
August Weather	23°C (74°F)	111 mm (4.4 inches)	76%	very high
September Weather	19°C (67°F)	96 mm (3.8 inches)	75%	very high
October Weather	14°C (58°F)	132 mm (5.2 inches)	75%	high
November Weather	7°C (45°F)	101 mm (4.0 inches)	80%	moderate
December Weather	2°C (36°F)	130 mm (5.1 inches)	80%	low