Kumamoto in April: weather, what to wear and what's on

Averages for 1991–2020 at the JMA's Kumamoto station (38 m above sea level).

High

21.4°C (71°F)

Low

10.6°C (51°F)

Precipitation

144.9 mm

Wet days

9.4 days

Sunshine

184 hours

• Highs rise 5.3°C from March and climb another 4.6°C into May.
• That is 0.8°C below Kumamoto's yearly average high of 22.2°C.
• Of our 34 places with temperature records, Kumamoto is the 5th warmest in April: 0.4°C cooler than Kagoshima and level with Yakushima.
• April is Kumamoto's 6th wettest month (144.9 mm).
• Of our 35 places, Kumamoto has the 9th highest precipitation in April: 2.0 mm less than Ishigaki and 1.0 mm more than Kanazawa.
• Rain of 1 mm or more falls on 9.4 days, and 10 mm or more on 4.6 days.
• Rain of 30 mm or more in one day falls on 1.4 days, and 50 mm or more on 0.5 days.
• The sun is out for 40% or more of the possible hours on 17.3 days, and 4.2 days have under 0.1 hours of sunshine.
• On 15 April 2027 the sun rises at 5:48 and sets at 18:47 in Kumamoto, giving 12 hours 59 minutes of daylight (NAOJ).

Average temperature

15.8°C (60°F)

Humidity

65%

Days of 25°C or more

4.9 days

Early, mid and late April

By the last ten days of April the average high in Kumamoto is 2.9°C higher than in the first ten.

By ten-day totals, 21–30 April is the wettest (54.5 mm) and 11–20 April the driest (40.9 mm).

Mild: highs around 21.4°C

• Long sleeves, or a T-shirt with a light jacket or cardigan.
• Layers you can take off: afternoons are 10.8°C warmer than early mornings on average.
• A folding umbrella: rain falls on 9.4 days.

Pack

• Folding umbrella

• Our clothing rules

Cherry blossom

The JMA's sample cherry tree in Kumamoto opens around 22 March and is in full bloom around 1 April in an average year (1991–2020). In 2026 it opened on 23 March and was in full bloom on 2 April.

Dates are for one sample tree at or near the JMA observatory, not for every park in the city.

National holidays in April 2027:

• Thu 29 April — Showa Day

In April 2025, hotels and inns across Kumamoto Prefecture were 58.8% full on average (8th busiest of 12 months). Foreign guests spent 166,200 nights there that month (Japan Tourism Agency). That compares with 62.8% in March and 59.8% in May.

• Japan in April: visitor numbers and busy travel days
• Holidays in April
• Golden Week