Weather: Long weekend starts sunny, then the clouds roll in

The long weekend started off promising with clear skies and a warming trend Saturday, but the forecasters warn things are looking chilly and damp over the next three days.
Saturday is looking clear through the daylight hours, reaching a high of about 20 C, under a UV index of 7 or high.
But things are expected to cloud over Saturday night, leading to periods of rain before morning.
The low is expected to tumble to 10 C.
Sunday looks miserable, frankly: Rain and more rain with a high of only 14 C