Annual rainfall levels were comparable to the mid-point of the millenium drought in 2006, but some previously parched parts of southern NSW have witnessed a bumper harvest which extended beyond Christmas in some areas.

Albury recorded 705.2 millimetres in 2020, up from 411.4mm last year, helped along by 129.8mm in March and 116.4mm in April and a further 84.2mm in August.

Areas further afield also didn't miss out.

Last year Culcairn had its lowest total spring rainfall since 1936 of just 46.6mm, but for the corresponding period this year it recorded 121.9mm with October being the highest monthly total with 57.3mm.

An autumn break also delivered 81mm in March followed by 106.4mm in April and Culcairn finished 2020 with 591.1mm compared to only 325.8mm last year.

Deniliquin still recorded two single digit monthly rainfall totals in February and November in 2020, but in March and April had 89.6mm and 93.4mm respectively.

It had 422.8 for the year, a big jump on the two previous yearly totals of 176mm and 228.4mm.

Corowa's annual total of 556.7mm was boosted by 93.4mm in March and another 74.4mm in April before 55.6mm in October was a timely boost ahead of harvest.

GrainCorp's regional operations manager for Southern NSW Warwick Smith said wheat, barley and canola crops all yielded above average.

"Our sites at Henty and Boree Creek have performed particularly well," he said.

"At Henty, canola has yielded above expectation, with growers achieving up to 3.5 tonnes per hectare and Boree Creek has had strong barley yields of 6 to 7 tonnes per hectare."

"We also re-opened our Lockhart site to help with receivals and ensure we were well equipped to manage local expectations of a bumper crop."

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GrainCorp's regional operations manager for Victoria, Brent Hornby, confirmed its sites at Deniliquin, Dookie, Oaklands, Tocumwal, Yarrawonga, Barnes Crossing and Numurkah have collectively clocked more than 800,000 tonnes this harvest.

"To cater for the large volumes of grain receivals, we arranged additional bunker storage at some of these sites, including Dookie and Deniliquin," he said.

"In fact, during the last bumper harvest in 2016-17 harvest, Deniliquin reached capacity at approximately 136,000 tonnes.

"Now, with the additional 40,000 tonnes of bunker storage, we've already clocked more than 144,000 tonnes and are on track to fill the site in the coming weeks.

"Oaklands is still seeing a fair bit of grain coming in, mainly from on-farm storage, so we're likely to keep taking deliveries at that site into January.

"While there have been some slight weather delays, quality has remained consistent across the board and growers in the area have been extremely positive.

"For many, this is one of the strongest winter crop harvests they've seen."

South of the border, Yarrawonga had 246mm of rain between January and April compared to just 30.8mm for the same period last year.

Its yearly total of 256.2mm was the lowest since 2006, but in 2020 515.2mm has fallen.

The Kiewa and Mitta valleys again recorded near average annual rainfall totals.

Dederang had a two-month combined total of 365.8mm in March and April with the latter being the wettest month for the year with 188mm.

The 2020 total of 936.3mm also exceeded 720.9mm which fell last year.

Dartmouth in the Mitta Valley had one of the highest monthly totals for the entire region in 2020 when 206.2mm fell in April as part of an annual total of 1038.2mm, up on the 806.2mm last year.

In the Upper Murray, Walwa had already exceeded the 2019 total of 519.4mm by August with 80.4mm falling in March and a further 96.6mm in April.

Another 174mm fell in October.

Wangaratta finished the year with 549.6mm and Benalla had 669.3mm.

Rainfall data sourced from Bureau of Meteorology.