Best time to visit Osaka

May is the best month in Osaka, scoring 75 out of 100, with August the weakest at 42. The 33-point spread means timing is worth planning around without being decisive. 4 of the twelve months sit within ten points of the best, so there is more than one right answer.

August is the warmest month at 31.8 °C and January the coolest at 8.5 °C — a 23.3 °C spread across the year. Around 57 days a year top 30 °C, concentrated in August and the months either side. 27 nights a year dip below freezing.

There is a real wet season here. June to September carry the rain — up to 17 wet days in a month — while January, February, November and December drop as low as 8. That 9-day gap is the biggest single difference between a good month and a bad one in Osaka, and it moves further than the temperature does.

Daylight runs from 9.8 hours in winter to 14.5 in summer, enough to notice on a sightseeing itinerary.

The three strongest months are May, April, October. The one to think twice about is August. Each month below has its own page with rainfall reliability, extremes, daylight and crowd levels.

Osaka month by month