Sunday
Areas of thundery rain are likely to be focused on Wales and the West Midlands, with some rain already occurring from early morning. A scattering of heavy showers and thunderstorms popping up elsewhere into the afternoon, concentrated across central and western parts of Britain, and much of Ireland. Eastern & southern counties of England more likely escaping dry. Murky in the northeast. Highs widely 17 to 23C, but only 12 or 13C in eastern Scotland.

Sunday night
Showers and rain tend to ease over night though parts of central Scotland could see some drizzly rain lingering. Misty and murky for eastern coasts. The best of any clear skies over north Wales and central England. Overnight lows at a humid 11 to 14C.

 
 
 

Monday
Slack low pressure stays in charge. Starting largely dry with patches of fog and drizzle locally. A little sun breaking through. A humid and unstable atmosphere will break out into areas of heavy rain and thunderstorms as the day progresses. These will be very hit and miss, but some places may see sustained downpours, whilst nearby areas stay largely dry. Central-southern England perhaps driest overall. Highs at 16 to 24C, coolest on eastern coasts.

Tuesday
Further localised thundery downpours developing during the day as slack low pressure stays across Britain and Ireland. Little wind, so bursts of rain may set in for longer periods where they form. Greatest risk across northern and western districts, whilst central and eastern England may escape mostly dry. Feeling humid, with a generally cloudy or hazy atmosphere. Highs at 16 to 25C.