Here’s some information to help you in your decision:
The best months for good weather in Christchurch are January, February, March, April, November and December
On average, the warmest months are January, February, March and December
July is the coldest month of the year
The rainiest months are May, June, August and October
The Metrocard is a way of paying for Christchurch’s public transport without rummaging for change. More to the point, the Metrocard gives you at least 25% off the fare price. This card is only worth getting if you are planning on staying in Christchurch for a while, as you have to buy the card for NZ$10 and be topped up with a minimum of NZ$10.
January is the hottest month in Christchurch with an average temperature of 18°C (64°F) and the coldest is July at 6°C (43°F). The wettest month is March with an average of 50mm of rain. The best month to swim in the sea is in February when the average sea temperature is 16°C (61°F).