Osaka Climate & Weather Averages
Japan · Humid Subtropical climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
Best Time to Visit Osaka
Based on temperature comfort, low rainfall, and sunshine hours, the best months to visit Osaka are:
June, September, July
Scores based on ideal temperature (18-28°C), low precipitation, and high sunshine. June scores 62/100.
Osaka has a Humid Subtropical climate with hot summers and cold winters. The warmest month is August with an average temperature of 29.0°C (84.2°F), while January is the coldest at 5.2°C (41.4°F). Annual precipitation averages 1834.0mm spread across approximately 177.0 rainy days per year, with July being the wettest month at 274.2mm and December the driest at 38.7mm. The city receives an average of 7.4-10.4 hours of sunshine per day, with the sunniest months being August and July. Humidity remains relatively consistent throughout the year, averaging around 74.9% annually, while average wind speeds reach 22.7 km/h. The overall annual mean temperature is 16.5°C (61.7°F), reflecting the humid subtropical conditions shaped by Osaka's latitude (34.69°) and surrounding geography. For travelers, the best time to visit is June, September, July, when temperatures are comfortable and rainfall is lower.
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.
Seasonal Climate Overview
Spring (Mar-May)
Average temperature 14.2°C (57.6°F), rainfall 170.1mm, sunshine 8.6 hrs/day, humidity 73.3%. Mild transitional weather characterizes this period. Expect around 14.6 rainy days per month.
Summer (Jun-Aug)
Average temperature 26.4°C (79.5°F), rainfall 236.6mm, sunshine 9.4 hrs/day, humidity 77.5%. Warm season conditions prevail. Expect around 19.9 rainy days per month.
Autumn (Sep-Nov)
Average temperature 19.2°C (66.6°F), rainfall 150.2mm, sunshine 8.5 hrs/day, humidity 75.9%. Mild transitional weather characterizes this period. Expect around 14.1 rainy days per month.
Winter (Dec-Feb)
Average temperature 6.1°C (43.0°F), rainfall 54.4mm, sunshine 7.7 hrs/day, humidity 73.0%. Cold season conditions dominate. Expect around 10.5 rainy days per month.
Monthly Temperature Averages (°C / °F)
| Month | Avg High | Avg Low | Mean Temp |
|---|---|---|---|
| January | 9.4°C (48.9°F) | 1.2°C (34.2°F) | 5.2°C (41.4°F) |
| February | 10.5°C (50.9°F) | 1.8°C (35.2°F) | 6.0°C (42.8°F) |
| March | 14.5°C (58.1°F) | 5.0°C (41.0°F) | 9.8°C (49.6°F) |
| April | 19.0°C (66.2°F) | 9.7°C (49.5°F) | 14.3°C (57.7°F) |
| May | 22.8°C (73.0°F) | 14.2°C (57.6°F) | 18.5°C (65.3°F) |
| June | 26.8°C (80.2°F) | 19.3°C (66.7°F) | 22.9°C (73.2°F) |
| July | 30.7°C (87.3°F) | 24.2°C (75.6°F) | 27.2°C (81.0°F) |
| August | 33.0°C (91.4°F) | 25.7°C (78.3°F) | 29.0°C (84.2°F) |
| September | 30.1°C (86.2°F) | 22.5°C (72.5°F) | 25.9°C (78.6°F) |
| October | 23.1°C (73.6°F) | 14.4°C (57.9°F) | 18.5°C (65.3°F) |
| November | 17.7°C (63.9°F) | 8.8°C (47.8°F) | 13.1°C (55.6°F) |
| December | 11.5°C (52.7°F) | 3.1°C (37.6°F) | 7.1°C (44.8°F) |
Monthly Precipitation (mm)
| Month | Avg Rainfall | Bar |
|---|---|---|
| January | 52.5 mm | |
| February | 72.0 mm | |
| March | 126.6 mm | |
| April | 165.6 mm | |
| May | 218.2 mm | |
| June | 247.8 mm | |
| July | 274.2 mm | |
| August | 187.8 mm | |
| September | 190.0 mm | |
| October | 162.7 mm | |
| November | 97.8 mm | |
| December | 38.7 mm |
Monthly Rainy Days (avg days with rain > 0.1mm)
| Month | Avg Rainy Days | Bar |
|---|---|---|
| January | 12.0 | |
| February | 11.8 | |
| March | 15.2 | |
| April | 13.2 | |
| May | 15.4 | |
| June | 17.8 | |
| July | 22.2 | |
| August | 19.8 | |
| September | 19.2 | |
| October | 12.8 | |
| November | 10.2 | |
| December | 7.8 |
Monthly Humidity (%)
| Month | Avg Humidity | Bar |
|---|---|---|
| January | 74.1% | |
| February | 72.5% | |
| March | 73.2% | |
| April | 72.3% | |
| May | 74.5% | |
| June | 78.3% | |
| July | 79.6% | |
| August | 74.5% | |
| September | 75.7% | |
| October | 75.9% | |
| November | 76.1% | |
| December | 72.5% |
Monthly Wind Speed (avg max km/h)
| Month | Avg Max Wind | Bar |
|---|---|---|
| January | 22.9 km/h | |
| February | 23.8 km/h | |
| March | 23.5 km/h | |
| April | 25.1 km/h | |
| May | 23.7 km/h | |
| June | 23.3 km/h | |
| July | 24.5 km/h | |
| August | 24.1 km/h | |
| September | 21.2 km/h | |
| October | 20.4 km/h | |
| November | 18.9 km/h | |
| December | 20.9 km/h |
Monthly UV Index (avg max)
| Month | UV Index | Risk Level | Bar |
|---|---|---|---|
| January | — | — | |
| February | — | — | |
| March | — | — | |
| April | — | — | |
| May | — | — | |
| June | — | — | |
| July | — | — | |
| August | — | — | |
| September | — | — | |
| October | — | — | |
| November | — | — | |
| December | — | — |
Monthly Snowfall (cm)
| Month | Avg Snowfall | Bar |
|---|---|---|
| January | 0.5 cm | |
| February | 0.6 cm | |
| March | 0.1 cm | |
| April | 0.0 cm | |
| May | 0.0 cm | |
| June | 0.0 cm | |
| July | 0.0 cm | |
| August | 0.0 cm | |
| September | 0.0 cm | |
| October | 0.0 cm | |
| November | 0.0 cm | |
| December | 0.3 cm |
Monthly Sunshine Hours (daily average)
| Month | Avg Daily Sunshine | Bar |
|---|---|---|
| January | 7.4 hrs | |
| February | 7.6 hrs | |
| March | 8.2 hrs | |
| April | 8.6 hrs | |
| May | 9.0 hrs | |
| June | 8.5 hrs | |
| July | 9.4 hrs | |
| August | 10.4 hrs | |
| September | 9.2 hrs | |
| October | 8.3 hrs | |
| November | 8.0 hrs | |
| December | 8.2 hrs |
Frequently Asked Questions
What is the hottest month in Osaka?
August is the hottest month with an average temperature of 29.0°C (84.2°F).
What is the coldest month in Osaka?
January is the coldest month with an average temperature of 5.2°C (41.4°F).
What is the rainiest month in Osaka?
July is the wettest month with an average of 274.2mm of precipitation. The city experiences about 177.0 rainy days per year.
When is the best time to visit Osaka?
The best time to visit Osaka is during June, September, July, when temperatures are comfortable and rainfall is lower.
Cities with Similar Climate (Humid Subtropical)
Other Cities in Japan
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.