Charles, 63, did the forecast for BBC's live lunchtime news after touring the studio with wife Camilla.
Their visit came as part of the couple's Holyrood Week.
After reading the BBC Scotland news, TV anchor Sally Magnusson handed over to the prince who read a specially-scripted forecast that took in Royal residences.
He joked about drizzle over Balmoral before adding: "The best of the bright and dry weather will of course be in the northern isles and the far north of the mainland.
"So, a little hazy sunshine for the Castle of Mey in Caithness."
PRINCE Charles gives weather forecasting a go during BBC tour
Looking directly into the camera in the Glasgow studio, he added: "But a cold day everywhere with temperatures of just 8°C and a brisk northerly wind. Thank God it isn't a Bank Holiday."
The prince proved a natural at doing the forecast. In fact he went down a storm...