Nagasaki Weather in April

Season: Spring

In short:
1. Nagasaki has an overall mild weather in April with a few heavy rainfalls.
2. Daylight hours are longer, so you have more time for outdoor activities.

3. The spring scenery is amazing: you can admire cherry flowers in full bloom in places like the Tateyama Park in early April and azaleas in the Mount Inasa in late April.

Strolling under Cherry Blossom Trees

Temperature

Dejimamachi View in Cloudy April

April is the most pleasant month of the spring season in Nagasaki, and the perceived temperature is very comfortable. The daily average high temperature is around 20 degrees Celsius (68 degrees Fahrenheit) and the average low temperature is 11℃ (51.8℉ ). Under normal circumstances, the minimum temperatures are generally above 10℃ (50℉). As for the maximum daytime temperature, the data is between 18-24.4℃ (64.4-75.92℉). On the whole, the temperature in April in Nagasaki fluctuates slightly and remains relatively stable. You probably feel cool in the morning and at night, but during most of the day, you feel quite warm.

Rainfall & Humidity

Rainy weather in Nagasaki in April is usual, with an average of 17 rainy days. To be specific, there might be 2-3 days with heavy rain, and the daily rainfall can reach more than 30 mm. But most of the time, it is moderate and light rain. The humidity of this month is moderately high at 68%.

Daylight Hours & Sunshine Hours

As time goes on, the sun in Nagasaki in April rises earlier at around 5: 52 and sets later at around 18: 49. Therefore, with an average of 13-hour daylight every day in April, you don’t have to be in a hurry to explore Nagasaki. Delightfully, the sunshine hours are also longer, averaging about 6 hours. You have more opportunities to enjoy the sparkling sea surface in the sunlight. But it also should be noticed that the UV index is relatively high at around 9, so sunscreen is necessary.

Visiting Snack Shop of Nagasaki

April: One of the Best Months to Visit Nagasaki

April is definitely an optimal time to visit Nagasaki. First, the climate is warm overall and daylight hours are getting longer. Your travel in Nagasaki won’t be bothered much by rain, unless you happen to encounter continuous rainfalls which, are just rare cases. Second, April is the best time for spring scenery. You can admire the pink and white cherry flowers in full bloom in early April. In late April, you can also enjoy splendid pink and red azaleas in Mount Inasa. If you decide to visit Nagasaki in April in 2026, you will see colorful spring scenery.

Packing Guide for Nagasaki Trip in April

Clothes

Given the generally stable temperature in April in Nagasaki, you can wear a cardigan or a knitted sweater with a large neckline over your long-sleeved shirt. Bring a trench coat as the following picture shows for rainy or cloudy days with chilly breeze. You can also add it over your inner layers in the morning and at night when the temperature is a little bit low. Regarding the lower body, long jeans or cotton dress will do.

Shoes
April is a great time for outdoor activities, so when choosing shoes, you’d better prioritize their comfort and lightness. Casual sneakers are the optimal choice.

Others
Masks are necessary to protect you from pollen brought by winds. Besides, you are recommended to bring some relevant medicine in case you have a bit of indisposition like loose bowls or a sore throat or nose.

Things to Do in Nagasaki in April

Solemn Atomic Bomb Hypocenter

Fine weather in April allows you to visit any attractions in Nagasaki. In the day, you can either visit the indoor attractions such as the Atomic Bomb Museum and the Nagasaki Museum of History & Culture, take a walk outdoors in places like the Central Park and the Dejimamachi, or have meals and snacks in Nagasaki Shinchi Chinatown. At dusk, you can take the cable car to Mount Inasa to enjoy the night view of Nagasaki.

In early April, you can also take photos with cherry flowers in the Glover Garden and the Tateyama Park.

From late April to early May every year, the grand Azalea Festival is held at Mount Inasa Park. If you decide to travel in Nagasaki during this time, you can also experience activities such as karaoke competitions and kite flying which are the highlights of the festival except for admiring azaleas.

Travel Tips for Nagasaki Trip in April

April 29th every year is the Showa Day, a national holiday when Japanese people commemorate their late Emperor Showa. From this day on, Japan enters the Golden Week and people may take several consecutive days off work. During this period, Nagasaki will be very crowded, leading to an awkward situation that the hotel and restaurants are expensive than normal times and hard to reserve. You’d better avoid this time period or make reservations in advance if you plant to visit Nagasaki in late April.

Crowded Nagasaki Business Street