Bureau of Meteorology technical officer Nigel Smedley said up until 9am yesterday there was nine millimetres of rain.

“After that, we had 1.2 millimetres and we’re down for tops of 31 degrees,” he said. 

“There is a 95 per cent chance of three to eight millimetres of rain.”

Mr Smedley said a cold front is forecast across most districts on Wednesday which will be accompanied by widespread rain. 

“A temperature drop with cooler air will push into the area,” he said. 

NSW Farmers chairman Alan Brown said for most winter crops they are pretty much finished.

“East of Wagga will benefit, right on the edge of the cereal belt,” he said. 

“Generally speaking, however, the benefit will be very limited because it's too late.

"We don’t have the results, but I am expecting an extremely small harvest because we had the combination of very dry weather and severe frosting that did the damage.”

Mr Brown said it’s a nationwide problem with huge frost damage in NSW, Victoria, South Australia and Western Australia. 

“I think there will be quite a lot of disappointed farmers,” he said.  

Wagga SES local commander Daniel Mahoney said residents need to exercise caution in rainy weather. 

“When we have a heavy downfall like this morning, our drains get full very fast and we want to make sure people don't get near the storm drains,” he said.

“They are fast flowing and we just want to make sure people are staying safe.”

“Earlier on Tuesday morning, we had a bit of a thunderstorm and we had heavy winds so stay away from trees and main power lines.” 

The humid temperatures are a result of a high pressure system.

“With the high pressure system in the Northen Tasman Sea combined with a trough over Western NSW is dragging warm and increasingly humid air down from the north,” he said. 

“The trough will slowly move east assited by an approaching cold front resulting in unsettled weather in many areas.”