OUR DRYING ENGINE

How the HangWashing drying score works

An ordinary weather forecast tells you what the sky may do. HangWashing interprets what those conditions mean for wet fabric on a washing line.

Air’s capacity to take moisture

Temperature and relative humidity are considered together because neither tells the full story alone. Warm air may support quick drying, but if it is already close to saturation it has less capacity to absorb moisture from washing. The engine estimates this atmospheric drying opportunity for every forecast hour.

Energy from sunshine

Incoming solar radiation supplies energy that warms fabric and helps water evaporate. HangWashing uses forecast radiation rather than treating a simple sunny or cloudy icon as the whole answer. Bright conditions can improve drying even when the air temperature is modest.

Wind that removes damp air

Moving air carries moisture away from the fabric surface and replaces it with drier surrounding air. A useful breeze can therefore transform an otherwise average day. The benefit is not unlimited: very strong wind and gusts are treated as practical safety risks.

Rain and usable drying windows

Atmospheric drying potential is assessed before rain probability and active precipitation are applied. This distinction matters because a warm, sunny and breezy hour may have excellent physical potential but still be a poor time to hang washing out when a shower is likely.

From weather data to useful guidance

Hourly results are brought together to identify a practical window, rather than relying on one daily average. The result becomes a clear 0–100 score and indicative drying times for lighter and heavier items.