When to go · Osaka, Japan
Best time to visit Osaka
The sweet spot is May, June and October — averages 20°C, 10 rainy days, moderate crowds.
March - May, October - November
Humid subtropical climate with four seasons. Spring (March-May) is the finest: cherry blossoms arrive in late March/early April (sakura season lasts 10-14 days - the parks fill with hanami picnic parties beneath the trees). The cherry blossom forecast is national news. Autumn (October-November) brings crimson maple leaves and a second great season of colour. Summer (June-September) is hot and humid (34-38 degrees C, 80%+ humidity) - unpleasant outdoors but excellent for indoor food culture. Winter (December-February) is cold (4-10 degrees C) with occasional snow that closes Osaka Castle's park beautifully.
The short answer
20°C · 10 rainy days · mid season
24°C · 12 rainy days · low season
19°C · 8 rainy days · high season
Hardest months: December and January. averages 8°C, 6 rainy days, moderate crowds.
Month by month
| Month | Avg temp | Rain days | Crowds | Verdict |
|---|---|---|---|---|
| January | 6°C | 6d | low | Cold |
| February | 7°C | 6d | low | Cold |
| March | 10°C | 8d | mid | Chilly |
| April | 15°C | 9d | high | Mild |
| May | 20°C | 10d | mid | Comfortable but damp |
| June | 24°C | 12d | low | Wet |
| July | 28°C | 11d | mid | Hot |
| August | 29°C | 9d | mid | Hot |
| September | 25°C | 11d | mid | Comfortable but damp |
| October | 19°C | 8d | high | Comfortable but damp |
| November | 13°C | 7d | high | Mild |
| December | 8°C | 6d | mid | Chilly |
Verdicts are read off the three columns to their left — temperature distance from 21°C first, then rainfall, with crowds breaking ties. Averages, so any given week can differ.
If you'd rather go cheap than perfect
January, February and June are low season in Osaka — thinner crowds, and the months where accommodation is easiest to book late. Budget travellers already work to about $50–80 a day here; low season is where the accommodation share of that goes furthest.
Book the month you picked
Fares move with the same seasons as the crowds — the quiet months above are usually the cheap ones to fly.