Hirosaki Weather in September

 Season: Autumn
 Key Points:
1.    Hirosaki’s temperature in September is very pleasant, neither hot nor too cool.
2.    Rainfall occurs a bit frequently, but in a mild manner mostly.
3.    Hirosaki Apple Park is highly recommended as there are many kinds of freshly ripe apples.

Pleasant Temperature

In September, the weather of Hirosaki is very cozy in general, but slightly different in each phase. In the early and middle periods of the month, you will feel like you are still in summer when the daily high temperature mostly remains at 26-29 degrees Celsius (79-84 degrees Fahrenheit), and daily low temperature at 15-20℃ (59-68℉). But by late September, the weather turns obviously much cooler, with the daytime temperature mainly ranging at 19-23℃ (66-73℉), and the nighttime temperature at approximately 10-15℃ (50-59℉); this makes you feel that the pace of autumn is accelerating.

Usually, mild rainfall this month won’t cause a significant drop in temperature, but occasional heavy rainfall may cause the temperature to drop by 5-8℃ (41-46℉). Particularly, at the end of the month, though you basically feel cool after rain during the daytime, you will perceive a slight chill at night.

Relatively Frequent but Mild Rainfall

Average rainfall: 74 mm (3 in)
Average rainy days: 17 days

Rainy climate is a bit frequent in Hirosaki in September as there are rainfalls occurring in 17 days of the month on average. However, don’t let this number scare you off. As long as proper preparations are made, you would still have an enjoyable trip this month. 

First, you need to be aware that Hirosaki may encounter several times of intense rainfall in September, so we advise you to check the local weather report earlier and avoid traveling in bad weather conditions. Secondly, it’s highly likely that there may be mild rainfall for two or three consecutive days, but they are mostly intermittent and each won’t last long. For a better travel experience, put your raingear at hand always and have a plan B, like arranging some indoor sightseeing tours for rainy periods.

High Humidity

Due to the rainy weather, the air is rather humid, with the mean relative humidity as high as 82%.

Daylight Hours & Sunshine Hours

As the month progresses, the sun gradually delays its rising time from 05:06 to 05:34, and sets earlier and earlier from 18:13 to 17:24. As a result, the daylight duration is shortening from about 13 hours to 11 hours 50 minutes. To make full use of your day, it’s recommended that you start your day early. For example, you may choose to enjoy a tranquil sunrise in an open area of the Hirosaki Park before having breakfast and visiting attractions like the Hirosaki Castle, Aomori Bank Museum, and Hirosaki City Museum, which are usually open at around 9:00-9:30.

The sunshine endures roughly 7 hours per day. Coupled with a moderate level of UV rays, taking sun protection measures is still necessary.

Things You Need to Pack for 2026 Hirosaki Trip in September

 Clothing
If you plan to visit Hirosaki in early or mid-September, prepare some light clothes, such as short-sleeved shirt and shorts or light pants. Summer dress is also appropriate for female visitors.

However, tourists who plan to travel during the late month are more recommended to bring both summer uppers like T-shirts and autumn uppers like long-sleeved shirts or light jackets for flexible change based on the actual temperature. As for the bottom, either loose trousers or thin jeans will do.

 Shoes
It’s advisable to wear comfortable walking shoes when visiting attractions of the downtown area. If you are going to climb the Mount Iwaki, a pair of non-slip hiking shoes is a better choice.

 Other Necessities

You also need to pack sunscreen and sunhat for sun protection and rain gear like the umbrella or raincoat in case it rains.

Travel Recommendations

1.    In September, there are not many tourists in Hirosaki, and the temperature is comfortable, so you can leisurely stroll around this city or rent a bicycle to cycle around. 

2.    September is the season of harvest, and this is most vividly demonstrated in the Hirosaki Apple Park. Different varieties of apples have ripened here, and you can enjoy the pleasure of picking them. Tourists who love apples are highly recommended to not miss this funny activity!

3.    Saishoin Temple Five-Story Pagoda has its special charm this month, as you can see that there are rows of red spider lilies in full bloom around it.

Hirosaki Weather by Month