Spring (March-May): Peak season featuring the famous cherry blossom season (sakura) in late March to early April. Temperatures are mild (10-20°C), perfect for walking and outdoor activities. Parks become crowded with hanami (flower viewing) parties. Book accommodations months in advance for cherry blossom season. Late March to April is the most expensive and crowded period.
Summer (June-August): Hot and humid with temperatures reaching 30-35°C. June brings the rainy season (tsuyu) with frequent rainfall. July-August are very hot but filled with festivals including fireworks displays and the Sumida River Fireworks. Typhoon season runs August-September. Indoor attractions like museums and shopping malls are more comfortable. Less crowded than spring/autumn but challenging weather.
Autumn (September-November): Excellent time to visit with comfortable temperatures (15-25°C) and spectacular autumn foliage from mid-November. Clear skies and lower humidity make it ideal for sightseeing. Mid-October to November is highly recommended for perfect weather and fall colors. Popular season, so book ahead.
Winter (December-February): Cold (0-10°C) but usually dry with clear skies. Excellent visibility for Mount Fuji views. Fewer tourists mean lower prices and shorter lines. Tokyo rarely gets snow but nearby areas offer winter sports. New Year (Oshogatsu) is a special time with temple visits (hatsumode) but many shops close December 29-January 3. Winter illuminations create magical nighttime scenes throughout the city.
Best Overall: Late March to April (cherry blossoms) or October to November (autumn foliage and perfect weather) - but expect crowds and higher prices. Budget Travelers: January-February or June (rainy season) offer lowest prices and fewer tourists.