Climate

New Zealand climate in July 2005

The New Zealand average air temperature for July was 9.1 °C, which was about a degree higher than usual in the North Island, and up to two degrees above normal in parts of the South Island. The national temperature was the third highest since records began in the mid 1860s, after 9.6 °C in July 1998 and 9.3 °C in July 2000. About half the typical number of July frosts were recorded in many areas.

Rainfall was well below normal in southern Wairarapa, and in much of south Canterbury and Otago, but above normal in the far north.

For more information on the climate in July, visit the climate summaries page at www.niwa.co.nz/ncc/cs/mclimsum_05_07

 

Percentage of average rainfall for July 2005 (recording sites shown with dots).

Difference from average air temperature in degrees Celsius for July 2005.

Average difference from normal July surface temperatures in the seas around New Zealand.


Global setting and climate outlook

El Niño-Oscillation remains neutral

Difference from average global sea surface temperatures for July 2005. Map courtesy of NOAA/Climate Diagnostics Center.

Monthly values of the Southern Oscillation Index (SOI), a measure of the changes in atmospheric pressure across the Pacifi c, and the 3-month mean (black line). Current values: Jul 0.0; MJJ -0.4.

The tropical Pacific is currently in a neutral state (no El Niño or La Niña). Conditions are likely to stay in the neutral range for the rest of the year. Equatorial Pacific sea surface temperatures (SST) are above average, as they have been for most of 2005.

The Southern Oscillation Index (SOI) has been near zero during June and July, with the 3-month May to July mean at –0.4.