Is today a good day to dry clothes outside?
A good drying day means humidity under about 60%, a breeze of 8 to 15 mph, temperature above 10°C, and no rain in the next few hours. Hit all four and a normal load is dry in two to four hours.
What a good day actually looks like
The best drying days are not the hottest ones. They are the ones where dry air is moving. A crisp October afternoon at 12°C with 45% humidity and a proper breeze will dry a wash faster than a muggy August morning at 24°C with 80% humidity and no wind at all.
That surprises people, and it is the single most useful thing to understand about line drying. Heat helps, but only by giving water molecules the energy to leave the fabric. If the air they leave into is already saturated, they have nowhere to go.
The rough tiers
Excellent: humidity under 50%, wind 10 to 20 mph, no rain due. A full load dry in two to three hours, towels included.
Fine: humidity 50 to 65%, some breeze, high cloud. Slower, four to six hours, but it will get there. Peg thin items first.
Skip it: humidity above 75%, still air, or rain within a few hours. Thick items may never fully dry, and washing left hanging in damp air starts to smell before it starts to dry.
Timing beats the day
Even on a good day, the hours are not equal. Drying rate climbs through the morning, peaks in the early afternoon and falls away sharply after about four o'clock as the temperature drops and dew begins to settle back onto the fabric.
A load hung at nine in the morning and a load hung at three in the afternoon are two very different bets, even in identical weather. Get it out early.
Let Washcast check for you
One clear verdict for your location today, plus a drying window for every fabric.