Summer occurs during the months of June, July and August in England. The average temperature is between 9 and 18 degrees Celsius (48 to 64 degrees Fahrenheit), although during heat waves, the temperature can climb as high as 30 degrees Celsius (86 degrees Fahrenheit).
The weather in England is unpredictable all year round but especially in summer. Although long, sunny days are to be expected, thunderstorms and extreme heat are possible. It is possible to experience sunstroke and dehydration if the weather is particularly hot, so it is best to cover up when out in the sun and to drink plenty of water. The longest day of the year typically falls on June 21, when the sun rises before 5 a.m. and sets after 9 p.m.