The rain is expected to hold off until late tomorrow but high cloud may put an end to any hopes of more hot, sunny days.
The past week had been warm and sunny for parts of Hawke's Bay despite the time of year, but MetService duty forecaster Liz Walsh warned, "if you get the sunshine, enjoy it".
"It doesn't look like you're going to get any precipitation until around Sunday, probably late Sunday, so it's probably fine with cloud basically - with light wind."
Showers expected to develop tomorrow night were "sprouting from the western ranges" but would not fully develop until later in the week.
While there might be some sunny spells over the weekend, "blazing sunshine" and "beautiful days" were unlikely.
"As far as cloud is concerned - if you get the sunshine, enjoy it - because there's a fair bit of cloud," she said.
"It's overcast, but it's what we call fine with high cloud."
Maximum temperatures were expected to sit about the the 20C mark, with these highs beginning to dip next week.
Forecasts show downpours are expected on Tuesday for Hastings and Napier.
Meanwhile, the outlook for other parts of the country was not so good. Forecasters were predicting icy weather to send temperatures plummeting for New Zealand's coldest weekend of the year so far.
Weather Watch analyst Richard Green said snow was expected to fairly low levels throughout Otago, Southland, the Canterbury foothills and Banks Peninsula.
People in the North Island could expect to feel the brunt of the bad weather tomorrow, with westerly flows tipped to bring showers throughout the western and northern districts.
"It's easy to forget that Saturday will actually see some wet stuff over the upper north but further south it'll be quite warm in the east with the 20s more than a possibility," Mr Green said. "But often when the thermometer is above 20C at this time of year it's what follows that can make some people nervous, as a wintry spell tends to follow."
- additional reporting, APNZ