She said yesterday's cold start could be put down to the morning's "clear skies" and added that the region's cloud cover would ensure temperatures were warmer.
The region's temperatures over the coming days were forecast to reach a high of 13C to 14C during the days, dropping to as low as 2C at night.
While there wasn't any rain forecast for Napier or Hastings, Ms Haddon said Wairoa could expect to get wet today.
The forecast for tomorrow was a crisp, fine start to the day with a high of 13C and light winds.
The fine conditions were also set to progress into Thursday and Friday, with light winds and sunny weather in store for the region at the latter end of the week.