Temperatures could fall as low as minus 4C (25F) this weekend as the a utumn's first widespread frost spreads across the country.
Forecasters have warned that temperatures could drop to zero degrees in Tayside and Fife as Scotland is hit by an unusually cold September weekend.
Sun worshippers returning to work after a record-breaking Bank Holiday weekend are unlikely to be missing out on precious tanning time, with forecasters predicting an abrupt end to the searing heat and cloudless skies.
Bank Holiday Monday was the hottest on record in late August, the Met Office said.
Temperatures plunged to below -7C as icy winter weather hit Tayside and Fife on Monday morning.
It may feel frostier than Iceland, but Scotland could soon be basking in record temperatures.