How reliable is Cologne Bonn Airport?
Month-by-month weather risk and connection guidance for Cologne Bonn 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 CGN yet
Our historical on-time and cancellation record currently covers the US, UK, Brazil, and Australia, so we don’t score departure reliability at Cologne Bonn 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 Köln (Cologne)
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 · 99/100 favorability
Roughest month
Most disruptive — low visibility & fog, snow · 91/100 favorability
The read on CGN
What the numbers say about flying through Cologne Bonn Airport
PlaneSane doesn't yet have on-time and cancellation history for Cologne Bonn 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, Köln (Cologne) is an unusually calm-weather airport year-round. July is the calmest stretch for flying, scoring 99 out of 100 for favorable conditions, while January is the most disruptive at 91, driven mainly by low visibility & fog and snow. 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 Köln (Cologne), 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 CGN
- What is the best month to fly from CGN for good weather?
- July has the calmest flying weather at Cologne Bonn Airport. January is the most disruptive, mainly from low visibility & fog and snow.
Planning a trip through Köln (Cologne)?
Score real flights to and from CGN on reliability, weather, and connection safety — not just price.