New Zealand climate in September 2006
September was a month of climate extremes with record low rainfall and high mean temperatures at many locations. Rainfall was low throughout much of New Zealand, especially in the east from Wairarapa to Canterbury. Some Canterbury locations recorded 10% of normal rainfall or less.
It was the third warmest September on record, with a national average temperature of 11.6°C, 1.2°C above normal. Temperatures were especially high in the east from Marlborough to Otago.
For more information on the climate in September, visit the climate summaries page at www.niwascience.co.nz/ncc/cs/mclimsum_06_09
Lower soil moisture storage
During September, there was a net loss of moisture in soils across most of the country, but particularly in the north and east of the North Island, and in Nelson, the South Island east coast, and inland Otago.
Mostly low river and stream flows
September stream flows were below normal over most of the country, but above normal flows occurred in the southwest of the South Island.
July 2006 to September 2006: the climate we predicted and what happened
Rainfall was lower than expected in the north of the North Island, and in the north and east of the South Island. More rain fell in the southern North Island than predicted.
The temperature outlook was correct in most regions, apart from the warmer than expected conditions in the north of the South Island.
North Island stream flows were above normal in the east, and normal in central areas, as predicted, but below normal in the north. South Island stream flows were lower than predicted in the north and in Otago.