Some places have had their warmest July night in over 20 years in Queensland, but some chilly nights are ahead. Gatton has stayed above 16.8 degrees since 9am on Friday to see its warmest July minimum since 1993. Warwick's low of 16.3 degrees was its warmest July night in 22 years of records. Elsewhere, Gympie failed to fall below 18.9 degrees, the highest July minimum in 20 years. Finally, Gold Coast's minimum of 18.6 was the highest in July since 2000. Despite the warm temperatures this morning, Sunday morning is going to feel a lot cooler. Kingaroy recorded a minimum of 16.5 degrees last night but is expected to fall to just 2 degrees on Sunday and zero on Monday. Warwick will follow suit, falling to 2 degrees also, bringing the potential of some light frost. Gatton and Gympie will fall to 5 degrees and Brisbane down to 8 degrees. This is just over 10 degrees cooler than this morning. This swing in temperatures is due to a trough that has crossed the region. The mix of cloud, moisture and strong winds kept the air from settling overnight, keeping the temperature up. In the wake of this trough, Sunday morning will be mostly clear with much lighter and drier winds, allowing the mercury to plummet.