A colony's winter survival depends less on the calendar than on where it sits. The Cairngorms and the Lizard Peninsula can differ by 5°C in mean January temperature and by a great deal more in rainfall and wind exposure — and each of those factors changes how a beekeeper should manage ventilation, insulation and emergency feeding through the cluster months.
More overwintering colonies are lost to damp than to cold. A dry hive at 0°C usually survives; a wet one rarely does — which is why UK beekeepers obsess over ventilation gaps in millimetres, not just insulation thickness.
A stylised 3D map of the United Kingdom is linked live to a hive cross-section: pick any region from the Highlands to Cornwall and watch the simulated bee cluster, top ventilation, condensation risk and fondant feeding needs adjust to that region's winter climate.
Winter temperature, humidity and wind exposure vary sharply across the UK. Those differences change how tightly a colony clusters, how much top ventilation is needed to avoid fatal condensation, and how much emergency fondant a colony is likely to need.
Select a region and step through the winter months, then adjust the top ventilation gap, roof insulation and site exposure. Compare your ventilation setting against the recommended value and watch condensation risk respond in the hive cutaway.
More UK colonies are lost to damp than to cold outright — a dry hive at freezing survives far better than a wet one a few degrees warmer, which is why beekeepers measure ventilation gaps in millimetres.