Historical weather data, all-time temperature records, and monthly climate averages for Osaka, Osaka, Japan. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Osaka sits squarely in the swing of spring, with highs averaging 60° and lows still dipping to a cool 43°. It's a coin flip for rain — 50% precip chance — so pack accordingly. The date has seen a 40-degree spread across its history, from a 34° chill in 2011 to a pleasant 74° in 2015.
Osaka earns its reputation as a city of extremes: the mercury has soared to a scorching 103° as recently as August 2023, and plunged to 19° on New Year's Day 2022. Summer storms can be ferocious — a single day in July 1980 dropped 7.02 inches of rain, and a 1968 February snowstorm buried the city under 8.9 inches.
Osaka is warmest in late July through August, when average highs reach 88°, and coolest in early January around 46°. If you're trying to dodge rain, avoid late June through early July — the wettest week averages 2.68 inches and marks the heart of rainy season. Spring and fall offer the most comfortable windows, with April and October highs in the comfortable 60s and 70s.