Lisbon

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Rainfall and Precipitation

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Rainfall and Precipitation in Lisbon, Portugal

Seasonal Patterns

  • Winter (December to February):

    • Average Rainfall: 90-120 mm per month.
    • Characteristics: This is the wettest season, with January typically receiving the highest precipitation. Rainfall is often heavy but short-lived.

  • Spring (March to May):

    • Average Rainfall: 50-80 mm per month.
    • Characteristics: Rainfall decreases as the season progresses. March can still be quite wet, but by May, sunny days become more frequent.

  • Summer (June to August):

    • Average Rainfall: 5-15 mm per month.
    • Characteristics: Very dry season with minimal rainfall. Occasional thunderstorms may occur, particularly in late summer.

  • Autumn (September to November):

    • Average Rainfall: 60-100 mm per month.
    • Characteristics: Rainfall begins to increase, especially in November, marking the transition back to the wetter winter months.

Average Rainfall Levels

  • Annual Average: Approximately 800 mm.
  • Monthly Variation: Significant variation with winter months being the wettest and summer months being extremely dry.

Impact on Daily Life

  • Transportation: Rain can lead to delays in public transport. Lisbon's hilly terrain may cause localized flooding, affecting road access.
  • Outdoor Activities: Rainy days can disrupt outdoor plans, especially in winter. Many locals and tourists prefer indoor activities during heavy rain.
  • Cultural Attitudes: Rain is generally accepted as part of life in Lisbon. Locals often carry umbrellas and wear waterproof clothing during the rainy season.

Tips for Visitors and Residents

  • Clothing: Wear layers and bring a waterproof jacket or umbrella, especially from November to March.
  • Footwear: Waterproof shoes are advisable during the rainy season to navigate wet streets comfortably.
  • Planning: Check weather forecasts regularly. Consider indoor attractions (museums, galleries) during rainy days.
  • Transportation: Use public transport (metro, trams) to avoid traffic congestion during rain. Be prepared for potential delays.

Local Considerations

  • Infrastructure: Lisbon's drainage system can struggle with heavy rainfall, leading to localized flooding. Streets may become slippery, especially on cobblestones.
  • Cultural Events: Some outdoor festivals and events may be rescheduled or moved indoors during rainy weather.

By understanding these patterns and preparing accordingly, visitors and residents can navigate Lisbon's rainy days with ease.