A welcome 20.2mm of rain fell at the Maitland Airport weather station on Sunday, according to data from the Bureau of Meteorology.

That compares to just 18mm of rain in the entire month of May and a dismal 13mm in April.

Sunday was the highest single day of rainfall for Maitland since March 30, when 53mm was recorded in 24 hours.

The April and May totals for this year were just a fraction of the long-term averages recorded in Maitland for those months.

The long-term April average of 94mm at the Maitland Visitor's Centre station, which was open from 1997 to 2016, is more than seven times higher than this year's April average.

The 2019 April total was the lowest April rainfall on record at either Maitland weather station.

The May average at the visitor's centre was 59mm - three times higher than this May.

Sunday's downpour was followed by a bit more rain on Tuesday, with 4.4mm recorded at Maitland Airport before 3pm.

Barrington Tops also received its first dusting of snow for the year overnight on Tuesday.

Snow chasers enjoyed the powder in the early hours of Tuesday morning. The Bureau of Meteorology had forecast snow for both Tuesday and Wednesday, as a cold front moves through the region.

Justin Lawrence from the Upper Hunter headed up to the Tops overnight and was met with a snow shower.

According to information released by Destination Barrington Coast 2-3 centimetres of snow fell, with a good dusting around Polblue campground.

"Visitors to Barrington Tops should be prepared for rapidly changing extreme weather including rain, wind and sub-zero temperatures," a statement from Destination Barrington Coast said.

More rain is predicted in Maitland on Wednesday, before sunshine and temperatures in the low 20s for the long weekend.