BBC monthly outlook
Monday 29 May—Sunday 4 June
Fine weather returning for a time
Bank Holiday Monday will see a lot of cloudy weather, with outbreaks of rain affecting central and northern parts, although northeast Scotland will be mainly dry. Some warm sunshine further south may trigger a few heavy afternoon showers. On Tuesday, the far north will be cloudy and damp, and a short spell of rain will cross other northern parts. Otherwise, there will be some sunny spells developing with no more than the odd shower. Wednesday and Thursday will see plenty of fine and warm weather developing although rain may reach Northern Ireland later, and this heralds a change for the end of the week: a slow breakdown to some thundery rain, eventually replacing the warmth in the southeast, with the weather turning a little cooler and fresher over the weekend.
Monday 5 June—Sunday 11 June
Some rain - often bright and warm in the southeast
For much of the week there will be a run of south westerly winds, bringing occasional bands of cloud and rain but also drier periods. These rain bands will be more potent in northwestern parts, while in the southeast any rain shouldn't last very long and won't amount to very much. Around midweek, one of the low pressure areas in the Atlantic may move close to Scotland, bringing stronger winds to many areas. Temperatures during the week won't stray far from normal in the north and west while southeastern parts are often rather warm.
Monday 12 June—Sunday 25 June
A fortnight of mixed weather likely
There is no strong indication of what type of weather will prevail in the second and third weeks of June. The most probable outcome is for the spell of mixed weather to continue. And with winds quite likely to be from a westerly quarter much of the period, this implies that southeastern areas will be rather drier and warmer than areas further north and west. Even so, all parts can expect some fine days, but equally any fine weather is unlikely to be prolonged - with occasional days of rain punctuating the dry periods. A thundery nature to some of the rainfall events should be expected.
Next week
We'll expect to give a firmer idea of the weather pattern for the first half of June.
http://www.bbc.co.uk/weather/2635167#outlook