Data from Melbourne Water's 130 monitoring stations across the metropolitan area and beyond shows that all suburbs had close to or above the long-term average summer rainfall.

But Frankston North, Devilbend reserve near Moorooduc and Arthurs Seat bucked the trend, showing less rain than last summer.

The highest rainfall was in Kinglake (260mm) and the driest suburb was Altona (59mm).

Paul Pretto of Melbourne Water said the relatively wet summer was in stark contrast to the oppressive heat and dry conditions of last summer.

"The weather was kind to gardens and water tanks, which is an unexpected bonus as we head into the cooler seasons," Dr Pretto said.

"Summer was also more forgiving on the catchments that harvest most of Melbourne's water, receiving an average of 231mm, the most rainfall in five years.

"This limited the plummet in storages we've become accustomed to seeing in recent years, but hot spells in between the downpours meant the ground dried out quickly, limiting the amount of water that made it into our reservoirs."

Storages dropped by 3.1 per cent over summer, to end the season at 34.9 per cent (631.6 billion litres) full, entering autumn with 83 billion litres more than the corresponding time last year.