Spring (April-May): Mild temperatures, cherry blossoms in parks, outdoor festival season begins. Perfect for walking and exploring. Prices moderate.
Summer (June-August): Warmest season with long daylight hours, outdoor dining, Rhine cruises, and beach culture along the river. Peak tourist season with higher prices and larger crowds.
Fall (September-October): Pleasant temperatures, autumn colors, harvest season in Rhine vineyards, cultural events. Fewer crowds than summer, excellent for city exploration.
Winter (November-February): Christmas markets December-early January create magical atmosphere. Cold and rainy, but festive decorations and fewer tourists. Lowest prices of the year.
Temperature range: Summer highs around 24°C (75°F), winter lows around 2°C (36°F). Pack layers year-round as weather changes rapidly.