Lisbon enjoys a Mediterranean climate with mild, wet winters and warm, dry summers. Year-round temperatures are pleasant with average highs of 21°C (70°F) and lows of 15°C (59°F). Atlantic breezes moderate summer heat, and rain is concentrated in winter months.
Air quality is generally good, with occasional challenges from vehicle emissions in city center areas. The coastal location helps maintain fresh air circulation, and pollution levels are significantly better than many European capitals.