"A more subtropical flow is developing which leads to warmer conditions for Hawke's Bay, so on Sunday night there will be low zero for Napier but by Wednesday the overnight low will be about 12C so it's certainly going to be a lot warmer - it's certainly going to be a lot more noticeable for people this week," James said.
"With that northeast flow there is going to be a few showers later in the week, but nothing significant. There will be rain overnight on Wednesday night going into Thursday, we're not expecting it to be heavy."
With the lack of rain, it was a dry June and July is following suit for Hawke's Bay, along with the rest of the North Island.
A total 79.8 millimetres of rain fell in Napier between June 1 to 28, a figure that was "very little", according to Keyser.
"On the 13th of June 12.8mm fell in that one day, but there were only four days of rainfall in Napier for that month."