How reliable is Cheongju International Airport/Cheongju Air Base (K-59/G-513)?
Month-by-month weather risk and connection guidance for Cheongju International Airport/Cheongju Air Base (K-59/G-513). 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 CJJ yet
Our historical on-time and cancellation record currently covers the US, UK, Brazil, and Australia, so we don’t score departure reliability at Cheongju International Airport/Cheongju Air Base (K-59/G-513) 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 Cheongju
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 · 96/100 favorability
Roughest month
Most disruptive — low visibility & fog, snow · 86/100 favorability
The read on CJJ
What the numbers say about flying through Cheongju International Airport/Cheongju Air Base (K-59/G-513)
PlaneSane doesn't yet have on-time and cancellation history for Cheongju International Airport/Cheongju Air Base (K-59/G-513), 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, Cheongju is an unusually calm-weather airport year-round. April is the calmest stretch for flying, scoring 96 out of 100 for favorable conditions, while January is the most disruptive at 86, 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 Cheongju, 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 CJJ
- What is the best month to fly from CJJ for good weather?
- April has the calmest flying weather at Cheongju International Airport/Cheongju Air Base (K-59/G-513). January is the most disruptive, mainly from low visibility & fog and snow.
Planning a trip through Cheongju?
Score real flights to and from CJJ on reliability, weather, and connection safety — not just price.