Australia will sweat through a dry, hot autumn as long-range forecasts show above-average temperatures and below-average rainfall on the horizon.There will be no relief at night either, with above-average overnight temperatures predicted across much of Australia for March, April and May.The Bureau of Meteorology (BOM) also currently rates the chances of an El Niño developing in the second half of the year at about 90 per cent, bringing more hot, dry conditions.Here's what Australians have to look forward to in