YESTERDAY'S rain came at the wrong time for about 90 per cent of the state's farmers, says South Australian Farmers Federation president Peter White.
"For about 10 per cent of cereal growers it may help a bit," he said.
"But it's really too late for most farmers."
AdelaideNow reports Mr White said the rain had come too late in the season for farmers yet to plant crops, while it was a disaster for those in the middle of harvesting.
Vine growers and lucerne farmers were the most likely to benefit from the rain, he said.
Port Lincoln airport recorded 33.2mm early on Sunday morning while Brinkworth in the state's Lower North received 24mm in the 30 hours up to 3pm.
Bureau of Meteorology senior forecaster Tom Boeck said: "It won't really fill up dams because most of the water will sink into the ground.
"But it is good for people who want to fill up rainwater tanks."
Mr Boeck said the thunderstorms that swept across the state yesterday would contract to the border overnight.
"Between 2am and 2pm (yesterday) there were 48,462 lightning strikes in South Australia," Mr Boeck said.
More stormy weather is predicted this week.
