The nature of the UK climate is such that the north and west of the UK will generally be prone to cooler and wetter conditions whilst the south and east is warmer and drier. This is exactly what we have this weekend with Atlantic low pressure pushing into the northwest whilst a ridge of high pressure keeps the southeast warmer and more settled.
That low pressure system is already pushing into western regions to start the weekend bringing increasing cloud, freshening winds and outbreaks of rain into much of Ireland and Northern Ireland this morning. Elsewhere and it is a mainly dry start with clear spells, variable amounts of cloud and the odd lingering shower. As we push on through the day the rain in the west will spread further east into much of mainland Scotland, northwest England, much of Wales and parts of southwest England, the heaviest of the rain falling over higher ground. This leaves northeast Scotland mostly dry and bright and it will also a dry day with sunny spells across East Anglia and southeast England. Temperatures for many areas will be in the high teens or low twenties, but for south-eastern parts of England highs of 25°C to 28°C are expected so feeling rather warm here.
Further spells of rain will affect much of the north and west tonight, turning heavier and more persistent for a time in many regions with the south and east of England remaining mostly dry. Tomorrow sees very little change with further periods of rain across many northern and western regions but the south and east will remain dry and bright with temperatures edging towards the 30°C mark once more.