Spring (April-May): Ideal weather with temperatures 15-22°C (59-72°F). Parks bloom with flowers, outdoor cafés open, and tourist crowds remain manageable. Perfect for walking tours and photography. Occasional rain showers require light jacket.
Summer (June-August): Warm to hot with temperatures 25-35°C (77-95°F). Peak tourist season with longer days and vibrant nightlife. Parks are lush, outdoor festivals occur frequently, and fountain shows run nightly. Air conditioning essential; some older buildings lack it. Afternoon thunderstorms provide relief from heat.
Autumn (September-October): Excellent conditions with 15-25°C (59-77°F) and colorful foliage in parks. Fewer tourists than summer while weather remains pleasant. Cultural season begins with concerts, exhibitions, and theater. September is particularly lovely with warm days and cool evenings.
Winter (November-March): Cold with temperatures -5 to 5°C (23-41°F). December brings Christmas markets and festive atmosphere. January-February can be harsh with snow and freezing temperatures. Museums and indoor attractions are less crowded. Cișmigiu Lake ice skating operates December-February. Budget travelers benefit from lower hotel prices.
Best Overall: Late April-May and September-October offer optimal weather, manageable crowds, and full accessibility to attractions without extreme temperatures.