Just over 250 millimetres of rain has fallen at Wollongong's Bellambi Point weather station so far this year, significantly up on the 103mm registered in the same period last year.

The city was drenched by 170.8mm in January alone, more than double the month's long-term average, while the 112mm recorded at Albion Park last month was also higher than the norm.

A series of complex troughs were responsible for storms in early to mid January and an onshore flow generated heavy rain late in the month, according to the Bureau of Meteorology.

The latest NSW Department of Primary Industries' seasonal conditions report reveals the wet welcome to the year wasn't isolated to coastal areas, with above-average totals recorded across 77 per cent of NSW.

DPI seasonal conditions co-ordinator Ian McGowen said the widespread rainfall had boosted summer crops.

"Good pasture growth has continued across much of eastern and central NSW, and there has been a major improvement across most of the west," he said.

The latest seasonal outlook from the BOM indicates the chance of drier or wetter-than-normal conditions between February and April are "near-equal" across the majority of the NSW coast, southern and north-east areas of the state.

In the shorter term, the umbrella will remain a must-have accessory in Wollongong this week. A shower or two is expected on Monday, with showers expected to hang around for the rest of the week.