BBC monthly outlook
Monday 11 July—Sunday 17 July
Unpromising start but warmer in south later
Outbreaks of rain and some heavy showers will mark the start of the week, no surprise given the proximity of a low pressure close to northern and western parts of the British Isles. Although this feature slips towards Scandinavia during Tuesday, it will continue to influence southern Britain's weather, providing copious showers, some of which may be thundery. At least Tuesday offers some respite for northern Britain, albeit short-lived. Wednesday will be a day of extensive showers with some sunny spells. Northern Ireland and western Scotland may see the heaviest of the showers, with a rumble of thunder possible.
Thursday and Friday will see a marked reduction in showers as pressure builds ahead of a deepening area of low pressure in the Atlantic. At this range, the weekend looks as though it could deliver some summery weather, at least for the bulk of England and Wales, with temperatures in the mid to upper 20s Celsius. Although there is a good deal of uncertainty, it may be that the Atlantic low will spread weather fronts towards much of Scotland and Northern Ireland, suppressing both temperatures and sunshine amounts.
Monday 18 July—Sunday 24 July
Variation on a theme as summer flatters to deceive
There seems little hope of a prolonged dry spell, heatwave or any other mark of a superior summer as we enter the third week of July. The Azores high, so essential for a British summer, looks unlikely to dominate. More low pressure systems will continue to influence affairs, especially so across the north and west of Scotland and also Northern Ireland. Temperatures and sunshine amounts may well suffer.
What high pressure there is should exert some influence across southern areas. Dry weather with some warmth should dominate but the feel-good factor may be tempered by occasional showers. There is a slight chance that humid air of continental origin, might drift into southern Britain, offering higher temperatures temporarily but with a heightened risk of thunderstorms. Time will tell.
Monday 25 July—Sunday 7 August
August looms ... summer, it's you last chance
If the truth were known, we may change the month with little appreciable change to the overall weather pattern. A few days of drier, more settled weather will offer themselves up, only to be broken by the crossing of fronts. We should still be looking to the Atlantic for much of our weather. As was the case with mid-July, there is a small chance that continental air will bring the risk of humidity and thunderstorms. There is no surprise, in such a scenario, it's this sort of set up that makes August one of the wettest months in the year for some areas, particularly the likes of East Anglia.
Next week
The summer round of sporting and social events continues in all parts. Will the weather play ball? Your first sense of what's on offer can be found here.
http://www.bbc.co.uk/weather/2635167#outlook