How reliable is Sihanouk International Airport?
Month-by-month weather risk and connection guidance for Sihanouk International 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 KOS yet
Our historical on-time and cancellation record currently covers the US, UK, Brazil, and Australia, so we don’t score departure reliability at Sihanouk International 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 Preah Sihanouk
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 · 100/100 favorability
Roughest month
Most disruptive — thunderstorms, low visibility & fog · 97/100 favorability
The read on KOS
What the numbers say about flying through Sihanouk International Airport
PlaneSane doesn't yet have on-time and cancellation history for Sihanouk International 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, Preah Sihanouk is an unusually calm-weather airport year-round. December is the calmest stretch for flying, scoring 100 out of 100 for favorable conditions, while October is the most disruptive at 97, driven mainly by thunderstorms and low visibility & fog. 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 Preah Sihanouk, 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 KOS
- What is the best month to fly from KOS for good weather?
- December has the calmest flying weather at Sihanouk International Airport. October is the most disruptive, mainly from thunderstorms and low visibility & fog.
Planning a trip through Preah Sihanouk?
Score real flights to and from KOS on reliability, weather, and connection safety — not just price.