"It's definitely the coldest point of the year. Beforehand our coldest point was in late April with -7 in Twizel and this has definitely broken that mark."
At 6am, Omarama was the country's coldest spot with -7.3C, according to Metservice.
Twizel hit a low of -7 earlier on Wednesday morning and is not expected to reach temperatures above zero until 10am.
Langley said he's struggling to recall temperatures dipping this low at such an early stage.
Christchurch was sitting at -3C at 6am and Timaru on -6C at 7am.