Temperatures are set to decrease across the United Kingdom over the coming days, marking an end to the recent heatwave that affected southern and eastern England. Humidity levels are also expected to fall, potentially leading to more comfortable nights.

This shift in weather patterns follows a summer that has seen numerous heat records broken or matched. On Tuesday, the UK recorded its 34th day with temperatures reaching or exceeding 30C (86F) in a calendar year, a figure that previously stood as a record from 1995. Forecasters indicate this record is likely to be surpassed next week, with some predictions suggesting the development of a sixth heatwave.

A significant area of low pressure moving across the UK has already brought heavy rain and thunderstorms to many northern and western regions. Further thunderstorms are anticipated in parts of north-east Scotland on Wednesday, prompting the Met Office to issue a yellow warning for heavy, slow-moving showers and potential thunderstorms between 10:00 and 21:00 BST. These storms could bring up to 50mm of rain in localized areas within three to six hours, potentially causing flash flooding and disrupting transport.

Later on Wednesday and into the night, unseasonably strong westerly winds are forecast to develop across Scotland, Northern Ireland, the Isle of Man, and northern England, with possible gales on some hills and coastal areas. These winds will help to dissipate the high humidity that has contributed to uncomfortable conditions in recent days and nights.

By Thursday, temperatures across the UK are expected to range between 15C and 24C. While this may feel cooler after the recent hot spell, these temperatures are closer to the August average. For Scotland and Northern Ireland, this could translate to more pleasant summer conditions with fewer showers and increased sunshine.

Looking ahead, some forecasts suggest that temporary high pressure and southerly winds next week could lead to temperatures rising above heatwave thresholds in certain parts of the country, particularly in south-east England where temperatures might again exceed 30C. The precise extent, intensity, and duration of any potential heatwave remain uncertain as they are still some way off in forecasting terms.

This summer has already been notable for its sustained periods of high temperatures. The record-equalling 34 days of 30C-plus temperatures this year highlight a trend that weather experts are closely monitoring. The interplay between low and high pressure systems will dictate the weather's progression in the coming weeks.

Further information on related issues, such as hosepipe bans and the potential impact of prolonged drought on food supplies, is available from the BBC. The monthly outlook forecast provides more detailed long-range predictions.