A MetService spokeswoman said yesterday that 140.4mm had been recorded at Dunedin Airport so far this month, which was "significantly above" the average of 48.2mm.
It was probably the wettest July since records started in 1962.
Across the three months of winter Dunedin usually averaged about 140mm of rain, meaning the city had had pretty much an entire winter’s rain in the space of one month, the spokeswoman said.
Waka Kotahi NZ Transport Agency lower South Island system manager Graeme Hall said a preliminary estimate of $2 million made last week for emergency repairs to the Otago highway network would now be revised because of further damage in this week’s floods.
The priority for roading staff yesterday was to check surfaces, remove emergency signage and complete essential work to keep highways functioning over the next 10 days.
Investigations so repairs could be prioritised would be completed by the end of next week.
No significant infrastructure had been lost and the highway network in Otago had stood up well given the two weeks of flooding, Mr Hall said.
A Dunedin City Council spokeswoman said it was aware of some wastewater overflows in isolated parts of the city, but such incidents were "largely contained to streets".
Overall, infrastructure had held up well and contractors were busy working through over 180 weather related jobs in order of priority.
Portobello Rd and Coast Rd were being monitored for any sign of new landslips, the spokeswoman said.
Federated Farmers Otago president Mark Patterson said most of the impact had been confined to the coastal parts of Otago and further inland had not been too badly affected.
Between Federated Farmers and the Rural Support Trust, he was confident farmers who asked for assistance would be pointed in the right direction.
KiwiRail operations executive general manager Paul Ashton said rain had caused sections of the main south line to be closed due to debris and damage.
The section between St Andrews and Oamaru was hit the hardest and the sections between Oamaru and Dunedin, and Mosgiel and Balclutha were also closed.
Staff were working hard to reopen the line but it was too soon to give a firm timetable, Mr Ashton said.
Waitaki District Council roading manager Mike Harrison said contractors had been inspecting roads and cleaning up as much as they could.
About 29 local roads still remained closed and caution was urged for others. — Additional reporting Rebecca Ryan
