Weather on the South Island

The climate on the South Island is often quite mild and temperate just like the rest of New Zealand, if not perhaps a little on the extreme side when it comes to winter. Overnight frosts are common in winter and the average temperature is closer to 32°F, especially inland near the Southern Alps. 

The South Island also receives the most rainfall during the year with most of it evenly spread. However, surprisingly the winter months are the driest. Instead, it's more likely to see frosts and snow during the months of June, July, and August. 

The South Island is also home to the sunniest regions of New Zealand with Marlborough and Nelson leading the way when it comes to total hours of sunshine experienced. Each region gets around 2,300 hours of sunshine per year with the rest of the island fairly sunny all year round too. 

The South Island experiences a lot of snowfall throughout the year, especially around the Southern Alps region and in cities like Queenstown. Snow can be expected as early as April with a light dusting on mountain peaks. Heavier snowfall isn't common until late May to early June. 

The amount of snow and in what months it occurs is mainly due to the temperatures and rainfall; if it's cold enough, snow will fall. The months that experience the heaviest snowfall are June, July, and August. 

These months are popular among tourists who travel to the South Island for snow sports such as skiing and snowboarding. 

The weather on the South Island is known for being more on the cooler side so packing clothing items such as jumpers, thick socks, and pants are a must no matter what time of the year you're traveling in. During winter, you should always bring appropriate footwear (for hiking and walking around) as well as waterproof jackets and other snow gear if you're planning on participating in various snow activities. 

There are a number of locations that offer snow gear for hire if you forgot something or didn't pack the right clothes. 

Alternately, the warmer months on the South Island don't seem especially high temperatures, with the average high being around 59-68°F. This weather is fine for dresses, shorts, and t-shirts, but make sure you've packed some warmer weather as it does get colder in the evenings.