Geraldton in Western Australia's northern grain growing region is on track to record its second driest June in history.
The average rainfall for the month is about 100 millimetres, but so far just 14 millimetres has been recorded.
Agronomist Peter Norris says some crops are starting to wilt.
"Canola in particular wilts at lunch time and stays wilty until it cools down in the evening on areas that haven't had rain since the last days of May," he said.
"Generally they're still growing, but slowly at the moment. Some crops may end up running up because they haven't had enough moisture to keep them in the tillering phase."
Geraldton's dry spell is in contrast to the Pilbara to the north, where record rains fell in June, which is normally a dry season.
© ABC 2013
16:02 EDT With plenty of sunshine on the way, Queenslanders will feel the heat begin to build as a hot airmass works its way east.