Measured, not vibes
Best Time to Visit Osaka
By measured weather comfort, the top months for Osaka are October, May, April — and RouteVerdict's editorial pick, which also weighs crowds and prices, is March, April, May, October, November. The table below is computed from ERA5 reanalysis data for 2020–2024, measured at Osaka (4 m elevation).
Month by month
Osaka weather and comfort, 2020–2024
| Month | Avg high | Wet days | Comfort | Season |
|---|---|---|---|---|
| January | 9.5°C / 49°F | 6.5 | 28 | |
| February | 10.5°C / 51°F | 6 | 34 | |
| March | 14.5°C / 58°F | 9.7 | 52 | |
| April | 19°C / 66°F | 8.5 | 75 | Best |
| May | 22.7°C / 73°F | 10.7 | 79 | Best |
| June | 26.8°C / 80°F | 11.7 | 70 | Shoulder |
| July | 30.8°C / 87°F | 13.5 | 50 | |
| August | 33°C / 91°F | 12.3 | 41 | |
| September | 30.1°C / 86°F | 11.5 | 56 | Shoulder |
| October | 23.1°C / 74°F | 7.3 | 85 | Best |
| November | 17.7°C / 64°F | 6.7 | 73 | |
| December | 11.4°C / 53°F | 3.8 | 40 |
Comfort is RouteVerdict's 0–100 score: 100·exp(−(high−23)²/162) × (1 − min(0.35, wet days × 0.02)). The full method is on the methodology page. Weather data by Open-Meteo.com (ERA5, CC BY 4.0), 2020–2024 normals. Wet day = ≥1 mm precipitation.
What the seasons are actually like
Traveling to Osaka month by month
Osaka's comfort score peaks in October at 85.4, with an average high of 23.1°C and 7.3 wet days, just ahead of May's 78.6 and April's 75.2. Summer (July-August) is hot and humid, averaging 30.8°C and 33°C, with comfort dropping to 50.1 and 40.7 — August's score is the lowest of the year outside deep winter. Winter (December–February) sees highs of 9.5–11.4°C and comfort scores of 28.2–40.3, milder than many temperate cities.
FAQ
Osaka timing questions
What is the best month to visit Osaka?
By measured weather comfort (ERA5 2020–2024), the top months are October, May, and April, with October scoring highest. RouteVerdict's editorial pick is March, April, May, October, and November, which also weighs crowds, prices, and events.
What is the hottest month in Osaka?
August, with an average daily high of 33°C (91°F).
What is the rainiest month in Osaka?
July, averaging 13.5 days with at least 1 mm of precipitation.
When is shoulder season in Osaka?
June and September — the best-scoring months outside both the measured top three and RouteVerdict's editorial peak-season pick.
What is Osaka's least comfortable summer month?
August, with an average high of 33°C and a comfort score of 40.7 — lower than July's 50.1 and the lowest of any month outside deep winter.
What is Osaka's single best month for weather?
October, with an average high of 23.1°C, 7.3 wet days, and a comfort score of 85.4 — the highest measured for any month.