A westerly quarter airflow lies over the North Island on Monday while a low east of the South Island directs a southerly airflow in over the mainland.
For the western North Island expect a mix of sun and cloud, the odd shower at times also. About Wairarapa (mainly in the south) Wellington and Kapiti, rain develops in the afternoon as southerlies push in then easing later in the evening. The Bay Of Plenty has a mainly dry day with a mix of sun and cloud. Sunny for Hawkes Bay and Gisborne with northwesterly winds and afternoon temperatures in the high teens.
For the West Coast of the South Island, sunny about South Westland while further north expect morning rain then sunny areas increase from afternoon. Dry in the morning for Nelson and Marlborough, some rain develops towards midday as southerlies push in, easing back to the odd shower in the afternoon.
Early rain in Canterbury eases to the odd shower, showers clearing in the afternoon Banks Peninsula northwards while continuing further south. Expect snow in the mountains to stay above 500m. Winds cold from the south or southwest. Southland and Otago sees areas of rain or showers for much of the day, dry spells increasing about Southland from afternoon, cold southerlies, snow stays above 400m.
Image: Monday 23rd July 2018 3:00pm MSLP / Rain map – weathermap.co.nz