Osaka weather by month
2006-2025, 20 years of records · Not a forecast
Osaka has mostly sunny winters and a long, sticky summer. The rainy season runs from early June to mid July, and July is the wettest month of the year. In midsummer the heat barely eases at night. September can bring long wet spells when the autumn rain front meets typhoons. Cherry blossoms are best from late March to early April, and Asian dust sometimes hazes the spring sky. This is a food city, so on holidays it helps to book at least one restaurant instead of queuing.
May and October scored best when warmth and rain days were weighed together. Rain clustered in June and July (up to 11 rain days) and fell to 5 rain days in January.
Each month in a line
| January | properly cold, occasional rain | 10° / 3° |
|---|---|---|
| February | chilly | 11° / 3° |
| March | crisp and chilly | 15° / 6° |
| April | cool | 20° / 11° |
| MayGood | comfortably warm | 25° / 16° |
| June | hot | 28° / 20° |
| July | seriously hot, frequent rain | 32° / 25° |
| August | very hot | 34° / 26° |
| September | properly hot | 30° / 22° |
| OctoberGood | comfortably warm, occasional rain | 24° / 16° |
| November | cool, occasional rain | 18° / 10° |
| December | crisp and chilly, rain here and there | 12° / 5° |
The 12 months in numbers
The warmest month, August (34°C), and the coldest, January (10°C), were 24°C apart.
| Month | High | Low | Rain days | Rainfall | Humidity | Clear days |
|---|---|---|---|---|---|---|
| January | 10° | 3° | 5 days | 41mm | 68% | 6 days |
| February | 11° | 3° | 6 days | 65mm | 67% | 4 days |
| March | 15° | 6° | 10 days | 106mm | 65% | 7 days |
| April | 20° | 11° | 9 days | 114mm | 64% | 6 days |
| May | 25° | 16° | 9 days | 149mm | 66% | 5 days |
| June | 28° | 20° | 11 days | 192mm | 72% | 2 days |
| July | 32° | 25° | 11 days | 208mm | 75% | 4 days |
| August | 34° | 26° | 8 days | 147mm | 70% | 7 days |
| September | 30° | 22° | 10 days | 158mm | 71% | 5 days |
| October | 24° | 16° | 9 days | 136mm | 71% | 7 days |
| November | 18° | 10° | 6 days | 72mm | 71% | 8 days |
| December | 12° | 5° | 6 days | 55mm | 69% | 8 days |
Enter your dates to see how that stretch went in each of the past 20 years.
Common questions
When is the best time to visit Osaka?
May and October scored best when warmth and rain days were weighed together. Rain clustered in June and July (up to 11 rain days) and fell to 5 rain days in January.
Which month is driest in Osaka?
January. Over 2006-2025 it averaged 5 rain days and 41 mm of rain.
Which month is warmest in Osaka?
August, with highs averaging 34°C and lows 26°C. The warmest month, August (34°C), and the coldest, January (10°C), were 24°C apart.