SH48 Bruce Rd has also reopened.
A road snowfall warning remained in place for the Desert Rd, MetService said.
“A few light snow flurries may affect the road above 600m until early Friday afternoon.”
Temperatures dropped to -2.2°C on the Desert Rd overnight while Taupō registered -0.7°C, Rotorua 1.7°C, Whakatāne 3.7°C and Tauranga 4.2°C.
MetService meteorologist Thapi Makgabutlane said there would be a break in the weather on Friday and Saturday with brighter spells at times, however, temperatures remained on the nippy side all weekend, especially early mornings.
“On Sunday the next frontal system starts to move in from the west and by the end of the day there may be some showery weather in the Bay of Plenty and over the central North Island plateau.”