While tomorrow would be mainly fine there would be increasing high cloud, with scattered rain developing about the ranges in the evening, with a few showers spreading towards the coast.
Strong northwesterly winds were expected, Ms Clark said.
The week's highest temperature would come on Wednesday, with Napier expected to reach 19C. Across the region showers and strong southwesterlies were expected which could possibly turn to gales near the coast.
Thursday would see coastal showers clearing early, with winds turning westerly. But the change in wind would also bring cooler temperatures to the region - with highs of 12C in Mahia, 13C in Central Hawke's Bay, and 15C in Hastings.
Friday was expected to be mainly fine with isolated morning showers, with a southerly change.
Last month saw cooler temperatures and more rain than usual, Ms Clark said. A dusting of snow at sea level made what started off as a normal May pretty "atypical".