"People will want to take their coats outside with them that's for sure."
Rain would gradually ease on Saturday evening, but showers could linger into Sunday.
Sunday would see an "upward trend" with all rain set to clear by the evening and middling temperatures, Millward said.
Those travelling back to Hawke's Bay after school holidays should keep an eye on the roads, with snow predicted to affect both the Desert Road and Napier-Taupo Road on Friday night and Saturday.
Hawke's Bay is not alone in having a wet weekend with severe weather warnings in place for Marlborough, Wellington and Taranaki. Both Canterbury and Marlborough have snow warnings in place.