Osaka Climate by Month – Rainy Season, Temperature Averages

Summary

The climate figures for Osaka are averaged from 2016–2025 observations (10 years). Annual rainfall averages about 1,733 mm.

The rainy season runs March–October. The wettest month is July with 240.9 mm across 16 rain days; the driest is January at just 50 mm.

The hottest month is August (average high 32.8°C) and the coolest is January (9.1°C).

The most comfortable time to visit Osaka is January — less rain and milder heat.

Monthly averages · 2016–2025

Monthly averagesHighLowRainfallRainy season
January9.1°1.2°50 mm
6
February9.9°1.4°62 mm
7
March14.1°4.7°110 mm
11
April19.0°9.6°148 mm
10
May23.1°14.4°189 mm
12
June26.7°19.2°237 mm
14
July31.0°24.3°241 mm
16
August32.8°25.6°160 mm
13
September29.3°22.1°213 mm
15
October22.9°14.9°193 mm
11
November17.2°8.5°74 mm
7
December11.5°3.4°56 mm
7

Monthly averages

Osaka