Britain is currently basking in a mini heatwave with temperatures this week hitting 31C.
And with July on the way, the hot weather is expected to stay, which means hot, sticky and sleepless nights as temperatures remain high well into the night.
To help stay cool, many people have invested in fans which could spell bad news for your electricity bills.
Auto energy switching service Migrate reckons almost half the population use electric fans to help them stay cool during the hot, summer nights.
Their figures suggest, overall, that means electric fans add £1.7million a day to UK energy bills.
But on an individual level things are far more reasonable - with the typical electric fan costing just 7p to run for 8 hours, reports The Mirror.
This is worked out based on the output of a typical fan (70W) with the average unit cost for electricity being around 18p.
Of course, if you don't want to use a fan - or discover you can't get one - there are other ways to stay cool.
Other methods of avoiding restless nights include opening a bedroom window, sleeping without bedcovers, sleeping in separate beds, freezing or filling a hot water bottle with ice water, and switching to a lower tog rated duvet.
You can also take a cold shower before bed and keep curtains closed during the day to block out the sun.
Other tricks include spraying a bottle filled with cold water for cooling mist on demand or chilling a pair of socks in the fridge and putting them on before bed.
Max Green, energy expert at Confused.com which conducted the research for the Mirror, said: "News of a heatwave is an omen of sleepless nights to come. This year the discomfort isn't limited to the night; many homeworkers won't be able to benefit from the perfectly adjusted air conditioning systems of their employer's offices.
"The stifling heat can confuse our judgement when it comes to deciding whether to fork out for an expensive cooling system. They can be costly to buy and run, and are only useful for the few hot days the UK experiences every year.
"The humble electric fan is still one of the most common solutions for combating the heat, and at a cost of roughly 7p a night, it comes at a price that the majority of people will be willing to pay for comfort."
