The Metropolitan Office predicts that the UK will have a hot summer this year twice as likely as a hot summer, warning that the risk of heat waves is also increased.

This forecast is in the country's sunniest record, with the UK rising 630 hours since early March, the driest spring in more than a century.

Before a possible hot summer, temperatures soar above the average of the year (the last day of meteorological spring).

Heathrow, located in western London, experienced 26.7 degrees Celsius in Saturday weather, while grass pollen levels are high in southeast England.

"While the current three-month outlook shows an increase in chances of hot summers, the temperature signal this summer is similar to that in recent years and is consistent with our warm climate," the Metropolitan Office said.

These forecasts come from the Metropolitan Office for the three-month outlook for June, July and August, which provides government contingency planners and businesses with risk assessments of abnormal temperatures, rainfall and wind. It is based on an assessment of a wide range of weather patterns throughout the UK and factors in recent global weather trends.

"This is not as a public forecast, to let people look and figure out if we can have garden parties in August or July," said Nicola Maxey, a spokesman for the Metropolitan Office.

"At this time of year, the global signal affecting UK weather is usually weaker," she added. "But in line with our warm climate, as we have seen in recent years, the current outlook shows an increased likelihood of temperatures above average this summer. This does not guarantee a long-term guarantee of long-term hot weather or heat waves; while we can see hotter and warmer nights than usual, we can also see calmer days and fewer cooler days and less warmer."

The outlook shows that the UK will be 2.3 times more likely than normal people in the meteorological summer that begins on June 1 and ends on August 31. During these months, the average temperature in the UK is in the range of 10-17°C, and the average in southeast England is 16-17c.

This will be in line with the trend of the recent unusually hot summer. The last time the UK experienced a "cool" summer was in 2015.

Continued extreme ocean heat waves in Northwest European waters - sea surface temperatures around the British coastline 1.5-2.5c above average - may raise the temperature further, although the extra warmth and moisture in the air may cause more severe summer storms.

The latest outlook also shows that rainfall and wind speed levels may approach average over the next three months. Many water companies will want to spend a wet summer to help avoid the need to limit water use. This week, after its driest start in 69 years, the Environment Agency announced drought in north-west England, with many reservoirs in the region’s historically low levels over the year.

According to the Metropolitan Office’s climate report, the UK’s summers have become warmer, wet and sunny in recent decades due to climate change.

Observations show that extreme temperatures in the UK are greatly affected than average temperatures. Compared with 1961-90, the number of “hot” days (28c) in 2014-23 has more than doubled, and the number of “very hot” days (30c) has tripled. High weather events (such as 2022 Heatwave), when temperatures in England exceeded 40°C for the first time, climate change is more likely to make people more likely and hopefully become more common in the future.