How reliable is Kumamoto Airport?
Month-by-month weather risk and connection guidance for Kumamoto Airport. We don’t yet have on-time performance history here — see why below.
Weather favorability
year-round climate
On-time performance data isn’t available for KMJ yet
Our historical on-time and cancellation record currently covers the US, UK, Brazil, and Australia, so we don’t score departure reliability at Kumamoto Airport yet. Weather climatology below comes from global airport observations and still applies.
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Weather by month
When the weather works for you at Kumamoto
A calm-weather score (0–100) for each month from decades of airport observations — how often conditions disrupt flying, not temperature. Higher is calmer.
Calmest month
Calmest flying weather of the year · 95/100 favorability
Roughest month
Most disruptive — low visibility & fog, thunderstorms · 79/100 favorability
The read on KMJ
What the numbers say about flying through Kumamoto Airport
PlaneSane doesn't yet have on-time and cancellation history for Kumamoto Airport, so it isn't scored for departure reliability here — that record currently covers the US, UK, Brazil, and Australia. The weather and connection context below comes from separate global sources and still applies.
On weather, Kumamoto is an unusually calm-weather airport year-round. October is the calmest stretch for flying, scoring 95 out of 100 for favorable conditions, while June is the most disruptive at 79, driven mainly by low visibility & fog and thunderstorms. The year is relatively steady, so no single month stands out as one to avoid on weather alone.
None of this guarantees your specific flight — it’s the backdrop. To turn it into a booking, score real flights to Kumamoto, read how we weigh it all in how the PlaneSane Score works, and brush up with how to pick a reliable flight and avoiding weather delays.
Common questions about KMJ
- What is the best month to fly from KMJ for good weather?
- October has the calmest flying weather at Kumamoto Airport. June is the most disruptive, mainly from low visibility & fog and thunderstorms.
Planning a trip through Kumamoto?
Score real flights to and from KMJ on reliability, weather, and connection safety — not just price.