A Niwa climate forecast for the September to November period predicts average temperatures for all regions in the lead-up to summer.
A weak El Nino effect is likely as summer beckons. The weather phenomenon usually brings strong southwesterly and westerly airflow over the country, and although it is present in the tropical Pacific, the accompanying winds have not yet shown up in seasonal forecasts.
Over the remainder of the spring period, higher than normal pressures are expected in the south Tasman and over southern New Zealand. As summer approaches, the warming climate will bring lower pressures to the north of the North Island and weaker than normal westerlies over the country.
Spring rainfall, soil moisture and river flows are predicted to be near normal for this time of the year in the west of the North Island, including Manawatu.
- © Fairfax NZ News
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