A misty, murky start to Thursday morning, but sunshine breaking through for most. Patchy light rain and drizzle affects north-eastern areas first thing in the morning, and may linger into the middle of the day in north-east Scotland. By the afternoon, heavy thundery showers are likely to break out in many areas, although these will be well scattered, some will avoid these completely. The East Midlands are most prone to seeing thunderstorms by late afternoon. Low cloud and sea fog may drift onto eastern coasts by evening. Cool on the north-eastern coasts, but elsewhere feeling warm and humid with light winds, top temperatures 15 to 19C.
Showers will fade through the evening, with most places will be dry overnight. Low cloud and coastal fog in the north-east, and even inland areas are likely to become misty and locally dense fog patches forming. Clearer spells towards Wales and the West Midlands may allow temperatures to drop a few degrees lower in rural areas, but for most overnight lows will be 4 to 7C.
A dull but dry start to Friday morning. Patchy rain affects Ireland in the morning, which may break out into some heavier showers. Showery rain also moves into Wales and western England by afternoon. Low cloud and murky conditions continue in north-east England and eastern Scotland, where it will feel cool at just 9 or 10C. An area of thundery rain threatens to spread out of northern France into south-eastern England late in the afternoon and evening. Feeling warm again in central and southern England, highs 15 to 18C.
Low pressure brings showers and longer periods of rain to most areas on Saturday. An area of persistent rain may affect the north-east of England and Scotland. Another band of rain is expected to spread from the south-west to affect much of England and Wales through the day. Behind this rain, plenty of heavy and thundery showers are likely for Wales and the south-west in the afternoon. Ireland also sees heavy periods of rain. Gusty winds around coastal areas, but lighter inland. Cool under the rain, and especially toward the north-east. Highs 10 to 15C.