Second half of summer to bring chances for rain but heatwave threat persists

The United Kingdom's weather could become more unpredictable during the second half of summer, with forecasts suggesting a potential increase in rain spells. However, temperatures are likely to stay above average, and the threat of further heatwaves persists, especially into early August.

This summer has already been marked by extreme heat, breaking several records, including some from the notable summer of 1976. A significant lack of rain has also characterized the season, with southern England experiencing over four weeks without measurable rainfall in some areas. This dryness has led to hosepipe bans for millions and provided ample fuel for wildfires.

Current weather models offer mixed signals regarding the coming weeks. Some forecasts indicate that low-pressure systems might become more prominent, particularly affecting Scotland and Northern Ireland, leading to wetter conditions. Conversely, the Azores high, a large area of high pressure over the North Atlantic, could remain nearby, potentially blocking weather fronts and maintaining drier conditions, though not entirely dry.

The Met Office's long-range forecast hints at a similar pattern, suggesting that high-pressure influence might decrease in late July. This could result in an increase in shower and thunderstorm activity, initially in the north of the UK before spreading south at times. Despite a potentially changeable start to August, above-average temperatures and the possibility of further hot spells are anticipated.

Forecasters acknowledge the inherent uncertainty in long-range predictions due to the chaotic nature of the atmosphere. They focus on overall trends rather than precise daily details, and currently, these trends remain unclear. The BBC Weather app is recommended for the latest forecast updates.