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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 10°C (51°F), with a range that can dip to a chilly -5°C (23°F) and peak at a warm 28°C (83°F). Expect 132 mm (5.2 in) of precipitation spread over about 15 days, contributing to an average humidity of a humid 87%.

April Temperature in Lisbon

In April in Lisbon, the average temperature is 10°C (51°F). The maximum can reach 28°C (83°F), while the minimum can drop as low as -5°C (23°F). Be sure to pack layers to accommodate the wide temperature range 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 10°C (51°F), with highs reaching up to 28°C (83°F) and lows dropping to around -5°C (23°F).
JanFebMarAprMayJunJulAugSepOctNovDec303340506270747267564135
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 132 mm (5.2 in), occurring over a span of 15 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 132 mm (5.2 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec91106101132130131133991151169496
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 87%. With an average temperature of 10°C (51°F), this humidity feels like a heavy blanket enveloping you, making outdoor activities uncomfortable and sticky, and often requiring frequent breaks to stay hydrated and cool.

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 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%88%87%87%81%83%82%76%77%82%89%86%
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 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 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 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098642
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-1°C (30°F)91 mm (3.6 inches)88%moderate
February Weather1°C (34°F)106 mm (4.2 inches)88%moderate
March Weather5°C (41°F)101 mm (4.0 inches)87%high
April Weather10°C (51°F)132 mm (5.2 inches)87%very high
May Weather16°C (62°F)130 mm (5.1 inches)81%very high
June Weather21°C (70°F)131 mm (5.2 inches)83%very high
July Weather24°C (75°F)133 mm (5.2 inches)82%very high
August Weather22°C (72°F)98 mm (3.9 inches)76%very high
September Weather19°C (67°F)114 mm (4.5 inches)77%very high
October Weather14°C (57°F)116 mm (4.6 inches)82%high
November Weather5°C (41°F)94 mm (3.7 inches)89%moderate
December Weather2°C (35°F)95 mm (3.8 inches)86%low

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