Osaka Weather in May
In Osaka, May brings high daytime temperatures around 25°C (77°F), with nights cooling to 15°C (59°F). Expect quite a bit of rainfall this month.
Rainfall in Osaka in May
Historically, approximately 15 days this month are expected to have rain, averaging 141 mm (5.6 in). When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.
Temperature in Osaka in May
In May, Osaka gets high temperatures, with highs of 25°C (77°F). Nights cool to around 15°C (59°F). Conditions stay fairly consistent through the month, making it easier to plan what to wear. Nights cool down to 15°C (59°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.
Sunshine in Osaka in May
The days are predominantly sunny, with an estimated total of around 202 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.If you favor pleasant temperatures and minimal rainfall, May is one of the best months to visit Osaka.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Japan, check out our Osaka's climate page.
Osaka Temperature in May
Min Temperature
15°C (59°F)
Max Temperature
25°C (77°F)
Chance of Rain
49%
Precipitation
141 mm (5.6 in)
Rainy days
15 days
Humidity
62%
Sunshine
202 hours
Percentage Sunshine
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Osaka typically rise from around 23°C (73°F) at the start of May to approximately 26°C (79°F) by the end. Nights are pleasant, with lows typically ranging from 13°C (55°F) to 18°C (64°F).
Average temperatures in May
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in May
Historical weather for Osaka in May
Browse day-by-day weather records for Osaka spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Osaka historical weather extremes in May
Based on weather observations in Osaka between 1976 and 2026, these are the recorded extremes during May.
- The warmest day in May was on May 22, 1998, with a maximum of 32°C (90°F).
- The coldest May day was on May 4, 1991, with a maximum of 15°C (59°F).
- Osaka registered its coldest May night on May 2, 1980, with temperatures dropping to 4°C (39°F).
Best Places in Japan in May
Find out more about the weather in Japan and which places have the best travel conditions in this month. See all of Japan in May →
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What to Wear in Osaka in May
Warm weather calls for comfortable, breathable clothing in May. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). High rain levels are expected, so pack waterproof gear and an umbrella or poncho. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in Osaka in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Japan, check out our Osaka's climate page.
Temperature Rainfall Sunshine Humidity
See the full Osaka climate overview or explore weather in Japan.
