Osaka Weather in May
Japan · Humid Subtropical climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
May in Osaka sees average temperatures ranging from a low of 14.2°C (57.6°F) to a high of 22.8°C (73.0°F), with a mean of 18.5°C (65.3°F). Compared to the annual average of 16.5°C (61.7°F), this month is 2.0°C warmer than the yearly norm. Precipitation averages 218.2mm, making it approximately 65.0mm wetter than the monthly average of 153.0mm. The city receives an average of 9.0 hours of sunshine per day during May, with relative humidity averaging 74.5%. Wind speeds reach an average maximum of 23.7 km/h. For travelers, this month offers a temperature experience in Osaka, with wetter-than-average conditions compared to the rest of the year.
Osaka's climate is similar to Tokyo but with a more pronounced urban heat effect. I visited during the humid summer and found the city's famous street food culture actually thrives in the heat — the covered arcades of Dotonbori provide perfect shelter from the sun. The data shows Osaka gets slightly warmer than Tokyo in summer, making air conditioning essential. Spring and autumn are the ideal windows for exploring the city's many temples and castles.
May vs Adjacent Months
| Metric | April | May | June |
|---|---|---|---|
| Mean Temp | 14.3°C (57.7°F) | 18.5°C (65.3°F) | 22.9°C (73.2°F) |
| Rainfall | 165.6mm | 218.2mm | 247.8mm |
| Sunshine | 8.6 hrs | 9.0 hrs | 8.5 hrs |
| Humidity | 72.3% | 74.5% | 78.3% |
| Wind | 25.1 km/h | 23.7 km/h | 23.3 km/h |
| Rainy Days | 13.2 | 15.4 | 17.8 |
Seasonal Context
May falls in Spring in the Northern Hemisphere. Spring is a transitional season with temperatures rising from winter lows. For travelers visiting Osaka in May, the data indicates mixed conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in Osaka in May?
The average temperature in Osaka during May ranges from 14.2°C (57.6°F) to 22.8°C (73.0°F), with a mean of 18.5°C (65.3°F).
How much does it rain in Osaka in May?
Osaka receives an average of 218.2mm of precipitation in May, spread across approximately 15.4 rainy days.
What should I pack for Osaka in May?
Based on May weather data, pack layers including light jackets and t-shirts, plus an umbrella. Rain gear is essential — this month averages 218.2mm of precipitation.
Is May a good time to visit Osaka?
May is a month with challenging conditions. Plan activities carefully and stay hydrated.
Other Months for Osaka
Cities with Similar May Climate (Humid Subtropical)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: 34.69°, 135.5°. Timezone: Asia/Tokyo. Last updated: 2026-07-30.