The speed at which clothes dry outside depends on various factors, including the temperature, humidity, wind speed, and sunlight. In general, clothes will dry faster in warmer and drier conditions. However, clothes can still dry outside in cooler temperatures, albeit at a slower rate.
As a rough guideline, clothes can dry effectively when the temperature is above 40 degrees Fahrenheit (4.4 degrees Celsius). At this temperature, the water molecules on the clothes will begin to evaporate, aided by the air movement and low humidity, which allows the moisture to be carried away from the fabric.
Ideally, temperatures between 60 to 75 degrees Fahrenheit (15.5 to 24 degrees Celsius) with low humidity and moderate wind speed provide optimal drying conditions. The sun's heat can also help accelerate the drying process, especially on sunny days.
In colder temperatures, or when the humidity is high, drying times may be significantly longer. In some cases, clothes may freeze rather than dry, especially in temperatures near or below freezing, making outdoor drying less practical during very cold weather.
Keep in mind that local weather conditions and climate patterns will influence the drying process. Always check the weather forecast and consider the specific conditions in your area when deciding whether to hang your clothes outside to dry. If drying outside is not feasible due to weather conditions, using an indoor drying rack or a clothes dryer is a suitable alternative.