But it has been a double-edged sword as damp conditions are also making it harder for farmers to dry crops out for harvesting.
La Nina has kept temperatures and humidity higher in the Waimakariri and Hurunui Districts these past six months.
Ashley Gorge dairy farmer Geoff Rountree says this season’s growth has been "phenomenal".
"We are barely keeping up with the levels of growth, but as it has also been very damp, its causing delays in harvesting here so everyone is working hard to catch up," Mr Rountree said.
"We too are playing catchup on the harvesting, simply because it has been hard to stitch together three straight days of dry weather."
He recorded 200mm of rainfall in November and another 120mm in December, and this has meant it has been hard to string three consecutive warm dry days together.
"This has put us late harvesting this year.
"Look at the grass around the place, normally it will be brown, but look at how high it is now and how green the paddocks are. Everyone is scrambling to get their crops harvested so we are all late."
Cust arable farmer Roscoe Taggart said the amount of rain, and the lack of consistent dry days, had been making it very hard for him and his neighbours around him.
"We have had to be very aware of diseases as the grains get wet and stay wet.
"It’s been harder to dry them out and we are looking at ways to combat the diseases that threaten to come-on due to the moisture staying around."
Sue Harris, at the Druid farm in Hurunui, said there had been plenty of feed and grass growth on the hills on their property.
"Yes, it has been a great year although lamb prices have dropped a lot in recent months."
Hamish Galletly, a sheep and beef farmer also near Waiau, North Hurunui, said this season had been good.
"It’s been a cracker summer and we have heaps of feed for all our stock.
"There is a lot of tucker for the cattle up on the hills and as we make our own hay and baleage we have been carefully monitoring the weather forecasts, trying to sneak in a cut here and there whenever we could."
He said the market for ewes was down at present, and he had had to re-gig his thinking on what he was going to do with his sheep this year.
