Snow flurries may continue till about mid-morning Friday, bringing a further 2 to 4 cm of snow.
A road snowfall warning is also in place for the Napier-Taupō Rd between 4pm and 10pm today.
In the North Island, the Central Plateau had an overnight low of –3.3C and Taupō's overnight low on Friday will be –2C
MetService said there was a low probability of thunderstorms throughout Bay of Plenty and Coromandel Peninsula today.
The temperature in Rotorua and Taupō was expected to get down to -1C overnight Wednesday with some heavy showers expected today.