Osaka climate
Osaka (Japan) has a humid subtropical climate (Köppen Cfa). The average temperature over the year is 16 °C60 °F, and about 1,753 mm69 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Osaka climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 847 | 133 | 440 | 662.6 |
| Feb | 1050 | 134 | 542 | 803.2 |
| Mar | 1457 | 338 | 947 | 1164.6 |
| Apr | 1967 | 847 | 1457 | 1355.3 |
| May | 2475 | 1456 | 1966 | 1596.3 |
| Jun | 2781 | 1865 | 2373 | 2138.4 |
| Jul | 3087 | 2374 | 2780 | 2208.7 |
| Aug | 3189 | 2475 | 2882 | 1787.0 |
| Sep | 2882 | 2068 | 2475 | 2258.8 |
| Oct | 2272 | 1457 | 1864 | 1927.5 |
| Nov | 1762 | 846 | 1254 | 933.7 |
| Dec | 1151 | 337 | 744 | 763.0 |
| Year | 3189 | 133 | 1660 | 1,75369 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 84% | 70% | 2.3 | 10:04 |
| Feb | 82% | 69% | 3.0 | 10:53 |
| Mar | 80% | 65% | 4.0 | 11:52 |
| Apr | 78% | 64% | 4.8 | 13:01 |
| May | 79% | 67% | 5.3 | 13:58 |
| Jun | 83% | 79% | 4.8 | 14:28 |
| Jul | 85% | 73% | 4.9 | 14:16 |
| Aug | 84% | 62% | 5.2 | 13:27 |
| Sep | 84% | 68% | 4.1 | 12:20 |
| Oct | 84% | 63% | 3.3 | 11:15 |
| Nov | 84% | 60% | 2.6 | 10:18 |
| Dec | 84% | 65% | 2.1 | 9:50 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Osaka is like
The warmest month is August, with an average high of 31 °C89 °F and a low of 24 °C75 °F. The coldest is January, when highs average 8 °C47 °F and lows 1 °C33 °F. Seasons are strongly marked: the warmest month is on average 23.2 °C41.8 °F warmer than the coldest.
It is wet, with about 1,753 mm69 in of precipitation per year. The wettest three-month stretch is July–September, which brings 36% of the annual total. The wettest month is September (225 mm8.8 in), the driest is January (66 mm2.6 in).
Relative humidity ranges from 78% in April to 85% in July. The clearest skies (lowest average cloud amount, 60%) are typical of November. Average wind speed near the ground ranges from 5 km/h (3 mph) in August to 8 km/h (5 mph) in March. Daylight lasts from about 9.8 hours in December to 14.5 hours in June.
Best time to visit Osaka
Based on these averages, the most comfortable months for sightseeing and outdoor activities are April and May and November. Average highs then reach 17 °C62 °F to 24 °C75 °F. Precipitation is 93 mm3.7 in to 159 mm6.3 in per month.
The most challenging month is July, which is hot, with average highs of 30 °C87 °F, very wet (220 mm8.7 in) and humid (85% relative humidity).
Comfort score: months are ranked by how close they come to an ideal. That means an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
Osaka weather by month
- January8 °C47 °F / 1 °C33 °F
- February10 °C50 °F / 1 °C34 °F
- March14 °C57 °F / 3 °C38 °F
- April19 °C67 °F / 8 °C47 °F
- May24 °C75 °F / 14 °C56 °F
- June27 °C81 °F / 18 °C65 °F
- July30 °C87 °F / 23 °C74 °F
- August31 °C89 °F / 24 °C75 °F
- September28 °C82 °F / 20 °C68 °F
- October22 °C72 °F / 14 °C57 °F
- November17 °C62 °F / 8 °C46 °F
- December11 °C51 °F / 3 °C37 °F
What to pack for Osaka
- Winter (December–February) — highs 847 to 11 °C51 °F, lows 133 to 3 °C37 °F, about 74 mm2.9 in of precipitation a month. Pack a warm coat, layers and closed shoes.
- Spring (March–May) — highs 1457 to 24 °C75 °F, lows 338 to 14 °C56 °F, about 137 mm5.4 in of precipitation a month. Pack light layers — T-shirts plus a light sweater or jacket, an extra layer for the cooler mornings and evenings and an umbrella or light rain jacket.
- Summer (June–August) — highs 2781 to 31 °C89 °F, lows 1865 to 24 °C75 °F, about 204 mm8.0 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and a good rain jacket or umbrella and quick-drying shoes.
- Autumn (September–November) — highs 1762 to 28 °C82 °F, lows 846 to 20 °C68 °F, about 170 mm6.7 in of precipitation a month. Pack light layers — T-shirts plus a light sweater or jacket and an umbrella or light rain jacket.
How Osaka compares
The nearest larger place is Yokohama, about 386 km to the east. Compared with it, Osaka is on average 0.5 °C0.9 °F warmer. It receives 7% more precipitation (1,753 mm69 in vs 1,636 mm64 in). The difference is largest in January (0.7 °C1.3 °F warmer).
World Climates covers 111 places in Japan. By annual mean temperature, Osaka is the 45th warmest of them. By annual precipitation, it is the 44th wettest. See all of them on the Japan climate page.
Some places in other countries have a very similar pattern of temperature and rainfall. The closest matches are East Hampton (United States, Cfa), Norfolk (United States, Cfa) and Virginia Beach (United States, Cfa).
The same NASA POWER grid cell also contains Sakai (pop. 826,161), Higashiosaka (pop. 493,940), Nishinomiya (pop. 485,587), Amagasaki (pop. 459,593), Nara-shi (pop. 367,353), Yao (pop. 273,213), Kishiwada (pop. 205,561), Izumi (pop. 184,615), Moriguchi (pop. 143,096), Tondabayashichō (pop. 132,873), Kadoma (pop. 131,727) and Matsubara (pop. 130,855) and 7 more places. Their long-term averages in this dataset are essentially the same as for Osaka, so they do not have separate pages.
Nearby places
- Climate in Hirakata 19 km · 15 °C59 °F · 1,657 mm65 in
- Climate in Kobe 29 km · 17 °C62 °F · 1,526 mm60 in
- Climate in Sandachō 33 km · 14 °C57 °F · 1,553 mm61 in
- Climate in Kyoto 43 km · 15 °C59 °F · 1,657 mm65 in
- Climate in Kusatsu 56 km · 14 °C58 °F · 1,674 mm66 in
- Climate in Minato 62 km · 18 °C64 °F · 1,825 mm72 in
- Climate in Himeji 74 km · 15 °C59 °F · 1,553 mm61 in
- Climate in Hikone 92 km · 14 °C58 °F · 1,865 mm73 in
Frequently asked questions
What is the warmest month in Osaka?
August is the warmest month in Osaka. Its average high is 31 °C (89 °F) and its average low is 24 °C (75 °F).
What is the coldest month in Osaka?
January is the coldest month. Its average high is 8 °C (47 °F) and its average low is 1 °C (33 °F).
When does it rain the most in Osaka?
September is the wettest month with about 225 mm (8.8 in) of precipitation. January is the driest with about 66 mm (2.6 in).
What is the best time to visit Osaka?
Judging by long-term averages, the most comfortable months are April and May and November.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station. So they can differ from airport records. The gaps are largest on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 264 m, while Osaka lies at about 4 m. Temperatures on this page were therefore adjusted by +1.7 °C3 °F using the standard lapse rate of 6.5 °C per 1,000 m.