March–May, September–October
| Season | When | Weather | Crowds | Events | What to expect |
|---|---|---|---|---|---|
High season | June–August | Hot (avg highs 29–32 °C), humid | High | Sumidagawa Fireworks, Mitama Matsuri | Packed sites, long lines, high prices. Best for festival-goers. |
Shoulder season | April–May, September–October | Pleasant (15–25 °C), moderate rain | Moderate | Sanja Matsuri, Kanda Matsuri, autumn leaves | Ideal for sightseeing, fewer crowds, better deals. |
Low season | January–March | Cold (avg 5–13 °C), crisp | Low | Setsubun, plum-blossom festivals | Peaceful travel, some closures, cozy urban exploration. |