October's climate

New Zealand climate in October 2006

Rainfall (click to enlarge).

Temperature (click to enlarge).

Rainfall was well above normal in Auckland, Wairarapa, Manawatu, and near Christchurch, and below normal in Central and East Otago. Record October rainfalls were recorded in Mangere, East Taratahi, and Palmerston North. The month was much windier than average over the South Island and the southern North Island.

Mean air temperatures were near or below historical averages in all regions. The national average temperature of 11.9°C was 0.3°C below normal.

For more information on the climate in October, visit the climate summaries page at www.niwascience.co.nz/ncc/cs/mclimsum_06_10

Dry in eastern pockets

Soil moisture (click to enlarge).

By the end of October, soil moisture levels were below normal in parts of Gisborne, Hawke’s Bay, Nelson, coastal Canterbury, and Otago.

 

High flows in the southern North Island

River flows (click to enlarge).

October streamflows were normal over the west of the South Island, higher than normal in the southern North Island and lower than normal elsewhere.

August 2006 to October 2006: the climate we predicted and what happened

(click to enlarge).

Rainfall

Rainfall was lower than expected in the eastern South Island and in parts of central and northern regions of the North Island.


(click to enlarge).

Air temperature

The temperature outlook was correct in many places, although conditions were cooler than expected in the western North Island and southwestern South Island.


(click to enlarge).

River flows

Streamflows were higher than normal in the southern North Island, and lower than normal in the northern South Island, as predicted. Flows in the north of the North Island and east of the South Island were mostly lower than predicted.


The three outcome maps give the tercile rankings of the rainfall totals, mean air temperatures, and mean river flows that eventuated from August to October, in comparison with the forecast conditions.

As an approximate guide, middle tercile rainfalls typically range from 80 to 115% of the historical normal, and middle tercile temperatures range about the average by plus or minus 0.5 °C.