Households across the UK are being advised to dry their clothes outside during a specific four-hour window this autumn to make the most of the sunshine and prevent dampness. Laundry experts say the optimal time to hang washing outdoors is between 10am and 2pm, when the sun's peak intensity occurs.
While temperatures remain relatively mild, autumn weather is bringing blustery conditions and more frequent rain showers, making laundry a frustrating task for those hoping to use their washing line. With the clock change looming at the end of this month, days will soon get shorter and darker, reducing the window for outdoor drying even further.
Why the 10am-2pm Window Works
According to experts, this four-hour period is typically the warmest part of the day, even in autumn. The sun's peak intensity during these hours allows households to benefit from both sunlight and wind, both crucial for evaporating moisture and helping clothes dry faster and more evenly.
The Royal Meteorological Society, in its online advice on drying laundry outside, said: “Clothes take longer to dry in cooler winter temperatures than in summer. But as long as the air is dry enough, water will slowly evaporate (or ice will sublime) even if the temperature is below freezing.”
The society added: “In fact, clothes will dry faster on a cold and dry day than on a warm and humid day, especially if they are in direct sunlight. Hang clothes out in the morning to make the most of the sun's peak intensity, which usually occurs between 10am and 2pm.”
Tips for Successful Outdoor Drying
The Royal Meteorological Society also advised: “Keep an eye on the forecast and look for breaks in the weather. Even if there's only a short window of opportunity, pop your laundry outside for a quick air dry.” By hanging clothes out early in the morning, washing gets a longer window to dry by maximising exposure to dry, warm and windy air.
Clothes should be dry, or very close to dry, by mid-afternoon if this four-hour time frame is followed. If laundry is still a bit wet, it is advised to bring it back inside to finish drying before the evening dew sets in, helping avoid dampness.
Eco-friendly household brand Planet Friendly Living added: “Even in the UK it is still possible to dry your washing outside in winter. You don't need a warm or sunny day to dry your washing (although that does speed up the process) you just need it to be dry.”
The brand continued: “A breezy day is always best, but so long as the ground outside is dry, you should be able to get a load of washing dry. Aim to hang out your washing as early as possible to give it the maximum amount of time to dry before the sun goes down. Bring it in promptly at the end of the afternoon to avoid the dew. If it's not quite dry you can finish it off inside on a clothes airer or even give it a short time in the tumble dryer.”
