New Zealand's weather is famously changeable — a single day can swing from bright sunshine to driving rain and back again, regardless of the season. Two main islands stretched across more than 13 degrees of latitude, combined with mountain ranges and surrounding oceans, mean conditions vary enormously from region to region at any given time. This variability also brings genuine hazards: ex-tropical cyclones, severe thunderstorms, heavy rain and flooding, snow, and strong winds can all occur with little warning, making it worth checking active warnings before heading out or making plans.