The North Island's run of fine weather will come to an end on Monday, with heavy rain to lash large parts of the Island.
It comes as an active front moves over the North Island with heavy rain expected, which has seen MetService issue weather warnings and watches.
An orange heavy rain warning is in place for Mount Taranaki until 2pm on Monday with 120mm of rain expected at peak rates of 25mm/h.
"Heavy rain may cause streams and rivers to rise rapidly. Surface flooding and slips are also possible and driving conditions may be hazardous," MetService said.
A heavy rain watch is also in place for the whole Taranaki region and Tararua Range until Monday afternoon.
MetService meteorologist Clare O'Connor told Newshub heavy rain lashed Taranaki and the Tararua Range overnight Monday.
Mt Taranaki has had around 50mm of rain overnight with most of that in the last couple of hours while the Tararua Range had 65mm of rain.
O'Connor said people in the North Island can expect a couple of days of rain as the active front remains over the island.
"The front itself is sort of going to get sandwiched between high pressure to the north-east and another one building in the southwest, so it's going to be a bit squished between that, so it's all sort of being concentrated over the North Island," she said.
"That will mainly be today and tomorrow. So it's going to be a wet couple of days for the North Island.
"The rain is going to hang around for a couple of days, which might be a welcome change for some, although it will still be a bit humid for those in the northern North Island."
Large parts of the South Island should remain pretty dry over the next couple of days but O'Connor warns rain could return later this week.
There also could be a welcomed reprieve for people in the South Island and Wellington who have experienced muggy overnight temperatures. A fresh southwesterly change in wind direction will see the temperatures drop.
Wellington is forecast to see a high of 22C on Monday with a low of 13C. It's even cooler in the South Island, with Christchurch forecast to reach only 17C and a low of 9C.
It's similar for Dunedin, which is forecast to reach only 17C on Monday and a low of 9C.
But it should still be pretty muggy in the North Island, with Auckland and Hamilton forecast to have a low of 18C on Monday, while it's even warmer in Tauranga with a low of 19C.
MetService short forecast for Monday:
Northland to Waikato, including Coromandel Peninsula, Bay of Plenty and Taupo
Cloudy with isolated showers at first. Rain spreading north today, with some heavy falls.
Gisborne and Hawke's Bay
Cloud increasing. Scattered rain in Hawke's Bay, spreading to Gisborne this afternoon.
Waitomo to Wellington and Wairarapa, including Taumarunui and Taihape
Rain, with some heavy falls, easing to isolated showers from the south this morning and afternoon.
Nelson, Buller and Westland
Remaining showers clearing this morning and becoming mainly fine. However, isolated showers about the ranges this evening.
Marlborough and Canterbury
Scattered showers, clearing this evening.
Otago, Southland and Fiordland
Mainly fine in North and Central Otago, and a few showers elsewhere, becoming confined to the south coast this afternoon.
Chatham Islands
A period of rain.
