Tuesday's early downpour will ease to light showers before spring sets in on Wednesday.
The second day of the season will see partly cloudy skies with an 18C high.
A southwest change overnight will see more rain in the region, which is forecast to stay for the weekend.
Ms Blades said while there were weather watches in place for most of the country Hawke's Bay would escape the worst of it.
Vice-president of Hawke's Bay Fruit Growers Association Xan Harding said after a relatively dry winter fruit growers would welcome the rain this week. "Most growers will be pretty relaxed at the moment but in two to three weeks they may start to worry," he said.
With an El Nino period on the way more severe frosts could occur and damage crops.
"The first frost of the season should be on Friday so growers will take precautions such as frost hands and sprinklers."
Hawke's Bay Federated Farmers provincial president Will Foley said it had been a tough time for local farmers.
"A lot of farmers really struggled due to a dry autumn and subsequent lack of feed," Mr Foley said.
He said although conditions have been good and dry many found it hard with the scarce amount of feed.
The dry weather has meant not a lot of mud and less pugging.