New Zealand Climate


The first half of January was cool, but warm summer conditions dominated the last 10 days of the month. The mean temperature for January was about 3.5 °C higher than for December.

Rainfall was below average in many areas, especially eastern Bay of Plenty. The southern Wairarapa, Kapiti, and Upper Hutt districts experienced heavy rainfall on 5 January, with local flooding, road closures, and other damage.

For more information on the climate in January, visit the climate summaries page at


Percentage of average rainfall for January 2005 (recording sites shown with dots). Click to enlarge.

Difference from average air temperature in degrees Celsius for January 2005. Click to enlarge.

Difference from normal surface water temperatures in the seas around New Zealand. Although temperatures in seas adjacent to New Zealand were below average in January, they rose during the month.