Mr Stewart said to the west of the main ranges many areas received 60mm or more rain in early January, but areas along the coast received considerably less and remained worst-affected by the early drought.
He said if more regular rainfall was to follow, then "this could have been the drought-breaker we were all hoping for".
"Droughts, however, are slow to build up and slow to recover from. While the relentless 'dry' is continuing to affect farmers here, we're hopeful that their drought plans have held them in good stead so they can recover as quickly as possible."
This early and hot, dry summer meant many farmers had been unable to make and save supplementary feed for later, or they have been using their winter feed already.
Some dairy farmers have dried off or culled cows early and bought in extra supplement feed.
Mr Stewart said identifying the longer-term impacts and planning for all the possibilities to get through winter will be crucial.
"We have resources for farmers who want support managing their feed budgets, understanding their options. They should call the local Rural Support Trust on 0800 RURAL HELP (0800 787 254)," he said.
Meanwhile, some farmers moving stock for grazing have raised concern about the cattle disease Mycoplasma bovis. The Ministry for Primary Industries (MPI) has produced a factsheet for farmers moving stock and feed so they can prevent further spread of the disease, and has regularly updated information on its website.
Farmers should contact MPI directly or talk to their veterinarian for more information.