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April Weather in Lisbon, United States

Last updated: June 24, 2025

In April, the average temperature in Lisbon, United States hovers around 6°C (43°F). Expect a minimum chill of -9°C (16°F) and a warm maximum of 26°C (79°F). During this month, 109 mm (4.3 in) of precipitation is likely to fall across approximately 14 days, with humidity levels reaching an average of 84%. Embrace the diverse weather!

April Temperature in Lisbon

In April in Lisbon, the average temperature is 6°C (43°F). Maximum temperatures can reach 26°C (79°F) and minimums can drop as low as -9°C (16°F). It's advisable to pack layers and prepare for a wide range of weather conditions while exploring the area.

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 6°C (43°F), with highs reaching up to 26°C (79°F) and lows dropping to around -9°C (16°F).
JanFebMarAprMayJunJulAugSepOctNovDec192229425564696760483424
Data source: Temperature data for Lisbon generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

April Precipitation in Lisbon

In Lisbon in April, the precipitation amount is 109 mm (4.3 in) over the course of 14 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 109 mm (4.3 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec7675651099395110796312910084
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Lisbon

In Lisbon in April, humidity is 84%. With an average temperature of 6°C (43°F), this humidity feels like a damp chill that penetrates your clothing, making outdoor excursions uncomfortable and prompting travelers to seek refuge indoors or find warm, sheltered spots to enjoy their surroundings.

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 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%85%84%78%72%75%74%77%85%86%85%
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.
JanFebMarAprMayJunJulAugSepOctNovDec2458910997532
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.
 TemperaturePrecipitationHumidityUV
January Weather-7°C (19°F)76 mm (3.0 inches)91%low
February Weather-5°C (22°F)75 mm (3.0 inches)89%moderate
March Weather-1°C (30°F)65 mm (2.6 inches)85%moderate
April Weather6°C (43°F)109 mm (4.3 inches)84%very high
May Weather13°C (55°F)92 mm (3.6 inches)78%very high
June Weather18°C (64°F)95 mm (3.7 inches)72%very high
July Weather21°C (69°F)110 mm (4.3 inches)75%very high
August Weather20°C (67°F)79 mm (3.1 inches)74%very high
September Weather16°C (60°F)63 mm (2.5 inches)77%high
October Weather9°C (49°F)129 mm (5.1 inches)85%moderate
November Weather1°C (34°F)100 mm (3.9 inches)86%moderate
December Weather-4°C (24°F)84 mm (3.3 inches)85%low

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