Osaka Weather in December

Season: Early Winter
In Short: Getting cold, hardly snows

The weather of Osaka in December, the early winter, is cold. But with global warming in recent years, it is not unbearably cold. It is sunny most of the days, and you can enjoy the warm sunshine during the daytime, especially in the afternoon. But the closer to late December, the colder the weather is. It doesn’t snow much in this month and the snowy days are mainly in late December. Traveling in this month, thick clothes are necessary to keep body warm.

Temperature

The average temperature in this month is 10°C (50°F). In early month, the temperature in daytime is pleasant for outing. After entering the mid-month, the temperature gets lower and lower and visitors should wear more thick clothes. The temperature difference between day and night is large and the maximum temperature difference can reach 7°C (44.6°F). Visitors can prepare some disposable pocket warmers if needed.
Average High Temperature: 12°C / 53.6°F
Average Low Temperature: 5°C / 41°F

Rainfall

Winter is the driest season in Osaka and the average rainfall in December is only 45mm. It has 5 rainy or snowy days and they are mainly in late month. According to the historical data, the average humidity is 58% which means visitors should take proper moisturizing measures in this month
Average Rainy Days: 5 days
Average Humidity: 58%

Sunrise & Sunset

In December, the month of the Winter Solstice, daylight hours are the shortest of the year. The sun rise at 06:58 and sets at 16:48, which means the daylight hours are only 9.5h. Shorter daylight hours mean shorter sunshine hours. The sunshine hours are around 4.6h in December. It’s a wise choice to go out in the afternoon when the sunshine is sufficient.
Daylight hours: about 9.5h
Sunshine hours: around 4.6h

Recommended Clothes to Wear in December

As the temperature drops, clothes should be gradually thicker too. But in winter, most of the indoor amusements or facilities uses central heating system so the temperature difference between indoor and outdoor places is pretty large. An easy-to-take-off thick overcoat can perfectly solve this problem.

Girls

Tops: For girls, clothes should be thick enough to make sure you don’t catch a cold. Wool overcoat and padded overcoat are strongly recommended. Also, sweater is the must as under clothes.
Bottoms & shoes: Winter pants are suitable for the weather. If girls want to wear more beautifully in winter, a pair of leggings and long boots can be a good match.

Boys

Tops: Boys can choose down coat to be the tops. Under the down coat, you can wear a thermal shirt plus a wool sweater so you can perfectly adapt to the temperature no matter indoors or outdoors.
Bottoms & shoes: Winter pants must be the first choice in winter. When the weather gets colder, you can add one more pair of long johns to keep warm. A pair of hiking shoes is good too.

Accessories: After entering the winter, accessories like hat, scarf and gloves should be prepared in your luggage. For some visitors who are afraid of coldness, some disposable pocket warmers are needed too.

Top Attractions to Visit in Osaka in December, 2025

Travel Recommendation:

1. Osaka Museum of History

Osaka Museum of History is a museum which is unmissable for visitors who are interested in Osaka history. It introduces nearly 1,400 years of Osaka’s history and it has many miniature models which are restored to original scale. Walking in the museum, visitors can personally experience the traditional culture and customs of Osaka. The Osaka Museum of History is also near the Osaka Castle Park and Namba Palace Ruins Park. On the top floor of the museum, visitors can enjoy the beautiful view of Osaka Castle. If you have enough time, you can visit these three attractions together.

2. Osaka Aquarium KAIYUKAN

Osaka Aquarium, KAIYUKA, December

Light show is the must-see activity while traveling in Osaka in winter. As one of the world's largest aquariums, except for countless marine animals, the annual light show in Osaka Aquarium KAIYUKAN is also worth watching. The most popular part of the light show is the light image of a 20-meter-long (21.9 yard) whale shark. Entering the aquarium, visitors can feel like at the bottom of the sea. The whole aquarium is covered with lights of animal images and lamps. If you travel here at Christmas, you can find a Santa Claus which is acted by a diver playing with whale sharks in the water. The light show in Osaka Aquarium KAIYUKAN is a good activity for families to enjoy.

3. Tennen Onsen Naniwa-no-Yu, Natural Hot Spring Naniwa

Hot spring, called onsen in Japanese, is one of the most popular activities in winter. One of the most popular onsens in Osaka is the Tennen Onsen Naniwa-no-Yu, which is located on the top floor of a commercial building in Nagara Nishi, Kita-Ku. Although it’s on the top floor, it’s still the natural hot spring because it draws the water from 659 meters (2162 feet) underground. The Tennen Onsen Naniwa-no-Yu has different kinds of hot springs and each one of them has their own curative effects. Here you can experience the open-air hot spring and relax your body after a busy day.

4. Osaka Spa World

Except for the Tennen Onsen Naniwa-no-Yu, here’s another place recommended for you to enjoy the onsen. The Osaka Spa World is located in the Osaka Shinsekai and it has special hot springs which are decorated in different styles of different countries in the world. Besides, it has many facilities like gym and restaurants. Visitors can spend almost a whole day here. After enjoying the onsen, visitors can also choose to take a walk in the Osaka Shinsekai and experience the local lifestyle there.

December Weather for Other Cities in Japan:

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