Kumamoto weather in January

January in Kumamoto: cold, a little rain, with clean air — a good time to visit.

Updated September 2026 · climate normals from ERA5 reanalysis

Kumamoto🇯🇵 Japan · Mainland Japan · City66
  1. 66Jan
  2. 67Feb
  3. 73Mar
  4. 83Apr
  5. 77May
  6. 56Jun
  7. 50Jul
  8. 54Aug
  9. 62Sep
  10. 86Oct
  11. 81Nov
  12. 70Dec

#8 of 12 months in Kumamoto · #814 of 1413 destinations to visit in January · comfort 66/100 (tier C)

Days
12°C
Nights
2°C
Wet days
9
Sun
6.8 h
Humidity
74%
Daylight
10 h
Kumamoto, Japan
Photo: Jan Bouken · Pexels

Traveller notes on Kumamoto in January

Notes from nearby Fukuoka (92 km away)

Kumamoto doesn't have its own notes for January yet — these are about Fukuoka, close enough to share the season.

Fukuoka-forum threads on winter travel describe January as genuinely cold but notably milder than Japan's other major cities this time of year, one regular specifically comparing it favorably to Seoul's harsher winter at a similar latitude. Coastal Kyushu's position keeps extreme cold snaps rarer here than further north, though posters still call proper winter layers essential - a real coat, gloves, scarf and hat. Snow shows up on occasion but isn't the norm, more a light dusting some years than a defining feature. Regulars point winter visitors toward a day trip out to nearby Yanagawa for a canal boat ride, plus the Fukuoka Asian Art Museum and the local motsunabe stew specialty. The record: 10.5C days feeling like 7C, 3.9C nights, 67mm across 9.3 days, 3.1cm of fresh snowfall, a 12.4C sea, 74 percent humidity and 6.6 hours of sun.
TenjinJanuaryRegular · January · 1 month ago · about Fukuoka · Read more on Tripadvisor ↗

Other months in Kumamoto

Forum posters describe April across Japan as genuinely one of the best months to visit, though variable - a light anorak or jacket is recommended for cooler days and evenings, while sunny stretches can push temperatures into the mid-20sC, warranting layers that can come off as needed. Posters specifically recommend early April in northern Kyushu, including Kumamoto alongside Saga, Oita and Fukuoka, as a strong window for cherry blossoms. Posters generally note April doesn't require a heavy winter coat anywhere in Japan by this point in spring, distinguishing it clearly from the colder months just prior. Posters generally rate April as mild, changeable but genuinely rewarding for Kumamoto, sakura season a real seasonal highlight worth timing a visit around.
Tripadvisor community · April · 1 month ago · Read more on Tripadvisor ↗
Forum posters call October broadly one of Japan's best travel months - warm days, cool nights, and even when a typhoon passes through, rain typically clears within a day or two back to clear blue skies rather than settling in. Early October can still run a touch warm, cooling noticeably by the end of the month. For Kumamoto specifically, posters note some tourist attractions may still be under restoration or closed depending on the year, but the castle grounds remain walkable and Suizenji Garden stays open regardless, giving visitors a reliable core itinerary even if other sites are affected.
Tripadvisor community · October · 1 month ago · Read more on Tripadvisor ↗

Add your own note from Kumamoto's card on the map.

Kumamoto climate normals — January

Daytime high12°C / 53°F🧥 cold
Nighttime low2°C / 35°F
Feels like (high)9°C / 48°F
Sea temperature11°C / 52°F🥶 cold sea
Rainfall75 mm / 3 in🌦 some rain
Rainy days9 days
Humidity74%💧 humid
Dew point1°C / 34°F
Sunshine6.8 h/day
Daylight10.3 h
Wind13 km/h / 8 mph
Snowfall2.9 cm / 1.1 in
Air quality (US AQI)47🍃 good

Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.

Crowds in Kumamoto in January

How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.

BusyWinter break (fuyuyasumi) in Japan, school holidays in 5 of the markets that fill it(estimated)

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Peak crowdsBusyShoulder seasonQuiet

Best months for Kumamoto's weather

Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).

Fair weatherKumamoto's best weather comes in April, October and November — separate windows, not one continuous season.

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Best weatherFair weatherToughest weather

What's on in Kumamoto in January

Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.

  • Hazard

    Mount Aso crater alerts

    1 Jan – 31 DecVolcanic activityClosures

    Nakadake is the day trip everyone books and the one that gets cancelled: the crater rim closes without notice on gas readings or a raised alert, and has been shut for long stretches. Check before you drive out. Source ↗

What's on around the world in January →

Nearby, and something's on

Within 300 km of Kumamoto — a day trip or a short hop — with something on this month. Never part of the comfort score.

Where is Kumamoto?

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Kumamoto in January — FAQ

Is January a good time to visit Kumamoto?
January in Kumamoto: cold, a little rain, with clean air — a good time to visit. It ranks #8 of 12 months for Kumamoto on SeasonMap's comfort score (66/100).
What is the weather like in Kumamoto in January?
In January, Kumamoto averages a daily high of 11.6°C and a low of 1.5°C, with about 75.1 mm of rain over roughly 9.2 rainy days.
What is the air quality in Kumamoto in January?
Kumamoto has a mean US Air Quality Index of about 47 in January.
Does it snow in Kumamoto in January?
Kumamoto sees roughly 2.9 cm of snowfall in January.

Within 300 km: Fukuoka's Tamaseseri at Hakozaki Shrine on 3 Jan, and Kagoshima's Cranes winter at Izumi around 1 Nov – 25 Mar.