Hottest Days Of Summer So Far Britain is expected to bask in its hottest days of the year so far today and tomorrow, forecasters say. Temperatures are expected to reach highs of 26 to 30°C (79-86°F) in the south east of England. But it does not look to be a completely dry day. The heat will trigger some heavy showers and thunderstorms across southern England and East Anglia, lasting into the night. Weather experts say this wet end is not unusual. Sky News Weather Presenter Nazaneen Ghaffar said: "This pattern of weather is not unusual at this time of year. In fact, it is well summarised by the well-known, if somewhat tongue in cheek, definition of a British summer - three fine days then a thunderstorm. For those further north and in the west of the UK and in Ireland it will remain drier but not as hot. On Thursday, temperatures will fall back to the low 20Cs. The welcome warm blast follows what the Met Office said was the coldest spring since 1962. There was a mean temperature across March, April and May of 6C (43F), which is calculated as being 1.7C below the long-term average. :: Proud of your photo skills? Upload your pictures to the glorious summer section on Sky's Your Photos.