How reliable is Sundsvall-Härnösand Airport?
Month-by-month weather risk and connection guidance for Sundsvall-Härnösand 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 SDL yet
Our historical on-time and cancellation record currently covers the US, UK, Brazil, and Australia, so we don’t score departure reliability at Sundsvall-Härnösand Airport yet. Weather climatology below comes from global airport observations and still applies.
Advertisement
Weather by month
When the weather works for you at Sundsvall/ Härnösand
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 · 97/100 favorability
Roughest month
Most disruptive — low visibility & fog, snow · 84/100 favorability
The read on SDL
What the numbers say about flying through Sundsvall-Härnösand Airport
PlaneSane doesn't yet have on-time and cancellation history for Sundsvall-Härnösand 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, Sundsvall/ Härnösand is an unusually calm-weather airport year-round. July is the calmest stretch for flying, scoring 97 out of 100 for favorable conditions, while December is the most disruptive at 84, 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 Sundsvall/ Härnösand, 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 SDL
- What is the best month to fly from SDL for good weather?
- July has the calmest flying weather at Sundsvall-Härnösand Airport. December is the most disruptive, mainly from low visibility & fog and snow.
Planning a trip through Sundsvall/ Härnösand?
Score real flights to and from SDL on reliability, weather, and connection safety — not just price.