Sendai Weather in August

 Season: Summer
 In short:
1.    Sendai weather in August is both very hot and humid.
2.    Rainy weather is likely to occur, especially in the early month.
3.    Early to mid-august, especially during the Tanabata Festival from August 6th to 8th, marks the high travel season in Sendai. 

Strong Sunshine in August

Temperature in August: Highest of the Year 

If you travel to Sendai in August 2026, your first impression will be that it’s hot, yet within a bearable level. High temperatures persist at around 26-33 degrees Celsius (79-91 degrees Fahrenheit) throughout the month, making August the hottest time of the year. Rainfall may cause the temperature to drop down to some extent, but it possibly won’t make a big difference to perceived temperature since the increasing humidity prevents your body from effectively dissipating heat.

However, the temperature does cool down after dusk, to about 22-26℃ (72-79℉) in general. Therefore, it’s recommended that move your outdoor activities forward a bit in early mornings or to late afternoon to avoid the hottest midday hours.

High Precipitation & Humidity

This month, there are about 17 rainy days on average. In early August, it is not strange that rain falls every day, but it generally does not last for too long, which has limited influence on outdoor activities. The total monthly precipitation is not very high, about 156mm, most of which comes from occasional heavy rainfall over one or two days which have greater influence on your outdoor visits. Thus, it’s better to check the weather forecast beforehand, and avoid hanging out in heavily rainy days.

With a high humidity up to 81%, combined with the high temperatures, you may easily sweat. To relief your discomfort, you can bring some wet tissue for cleaning your sweaty skin.

Sendai Delicacies

Daylight Hours & Sunshine Hours

Sunrise time (1st – 31st): 04:39 – 05:06
Sunset time (1st – 31st): 18:48 – 18:10
Daylength (1st – 31st): roughly from 14 hours to 13 hours

The daylight duration is adequate for your daily itinerary suppose there is no bad weather disturbing, but you need to be aware that the UV rays are quite strong with the average index of 6, perhaps even higher if there are no thick clouds. Thus, it is crucial to bring sunscreen products.

Sunny weather is not usual, averaging 11 days, but each day has approximately 9 hours of sunshine. This can be both advantageous and disadvantageous for while you are enjoying the landscape in good light, you may get sunburnt. To prevent sunstroke, you are advised to not expose under the sun for too long. Instead, you can take a rest in the shade of the park or escape from the heat in a shop or restaurant for a while.

What to Wear for Sendai Trip in August

 Clothing
To cope with the hot climate during the day, you’d better wear breathable and easy-drying clothing to alleviate discomfort from sweating. For example, cotton or linen shirts, light skirts, and thin T-shirts are all appropriate for the upper; shorts or thin casual pants are suitable for the bottom.

If you want to try yukata, a casual summer kimono, it’s suggested that you wear it during late hours when the weather cools down a bit. Another reason lies in that there are usually summer fireworks displays at night, and wearing this traditional suit will create better memories.

 Shoes
Shoes are better to be light and breathable, too. You can wear sandals if you like. For comfortable walking, it would be better to choose mesh casual shoes. Plus, you can prepare a pair of water-proof shoe covers in case it rains.

For yukata lovers, wooden clogs are the perfect match.

 Others
Bring a parasol, which is useful both in rainy and sunny weather. In addition to sunscreen, as mentioned above, sun hats and sunglasses are also essential for extra sun protection.

Travel Highlight of Sendai Trip in August : Tanabata Festival

The highlight of your Sendai trip in August is undoubtedly the Tanabata Festival in the early month. Lasting three days from August 6th to 8th, each day offers extraordinary experiences. The annual Sendai Tanabata Fireworks Festival takes place the night before the festival, where tens of thousands of fireworks light up the sky above the Hirose River. You can watch the best views from near the Tsutsujigaoka Park. During the festival, the streets of downtown Sendai, such as Jozenji Avenue, are adorned with colorful handmade “fuki nagashi” decorations, which cascade down like a galaxy after being illuminated in the evening. There are also lively street performances and various food stalls. Of course, the Sendai Aoba Castle are equally impressive, featuring performances by the Date Masamune samurai troupe and a castle ruins light show in the evening. These exciting events will surely leave you with unforgettable travel memories!

Fuki Nagashi Decorations

Travel Suggestions & Tips

 Since early to mid-August coincides with the local summer vacation, the number of tourists will increase significantly, leading to increased demand on accommodation and train tickets as well as higher travel cost. Therefore, tourists visiting Sendai during this period are advised to purchase tickets in advance.

 During the Tanabata Festival, the event venues in downtown Sendai will be very crowded, so it is recommended that you arrive early to secure a good spot and get the best view. Also, it may rain during the festival, so it is better to bring a raincoat instead of an umbrella

Crowds in Tanabata Festival

Sendai Weather by Month