Weather | 16°C-25°C, drier, easier for long outdoor days | 21°C-28°C, humid, rain increases through the month | 25°C-32°C, hotter, sticky, rainy season usually ends mid-month |
Crowds | Moderate to high around Golden Week and Sanja Matsuri | Moderate, with spikes during Sanno Matsuri and weekend hydrangea spots | High around fireworks, Tanabata, and school holidays |
Atmosphere | Bright spring greens, comfortable walking weather | Umbrellas, hydrangeas, shrine festivals, softer light | Festival-heavy, louder, later nights, true summer energy |
Key events | Natsu Basho, Sanja Matsuri | Sanno Matsuri, Bunkyo Hydrangea Festival, Torikoe Matsuri | Sumida River Fireworks, Tanabata, Mitama Matsuri |
Public holidays | Golden Week spillover through May 6, 2026 | None of the big national holiday crunches | Marine Day on July 20, 2026 |
Budget | High in early May, then settles | Usually stable; festival weekends can rise slightly | Higher on festival weekends and for late-month city stays |
Best for | First-timers wanting easy weather | Culture lovers, gardeners, museum fans, flexible planners | Festival chasers and travelers who don't mind heat |
Book early? | Yes for Golden Week and sumo | Yes for Sanno Matsuri dates, teamLab, Harry Potter, and weekend observation decks | Yes for fireworks, evening decks, and major summer events |
Transport tips | Smooth after Golden Week ends | Carry a subway-based rain plan; avoid festival routes on procession days | Start early to beat heat and packed evening trains |