In New Zealand (NZ) it really can be 4 seasons in one day although Global warming is certainly boosting the Summer temperatures.
Anyway - I thought it might help people traveling to New Zealand to know the seasons and what to pack.
Summer, between December and March is warm and doesn't seem to rain much. Perfect for a surfing holiday or summer mountain hiking and caming. Can get some really good Lord of the Rings scenery hikes in here.