How GoodDayTo judges window cleaning
Window cleaning benefits from a reliable dry period rather than a single dry moment. GoodDayTo strongly penalises upcoming rain and also considers wind, humidity and temperature because those factors affect spray, drying and whether the job is practical outdoors.
- Rain probability
- Measured precipitation
- Wind speed
- Humidity
- Temperature and daylight
🪟 Make the result practical
- A dry hour followed by a shower is usually a poor use of time.
- Very strong sun on hot glass can make water dry quickly and leave marks.
- Working at height has separate safety requirements that no weather score can replace.
Why the score looks beyond the current sky
Freshly cleaned exterior glass can be spoiled quickly by rain, windblown dirt or spray. The model therefore searches for a practical multi-hour dry block rather than reacting only to what the sky looks like now. Lower humidity and manageable wind can also help drying.
Temperature, sun and wind
Mild temperatures are generally easier for cleaning than very hot or very cold conditions. Strong wind can blow spray, dust and debris around and can increase risk if ladders are involved. GoodDayTo does not know whether your windows are shaded or sheltered, so product instructions and common sense still matter.
What the window-cleaning score cannot know
The app cannot assess ladder stability, reach, glass temperature, water hardness, cleaning products, local dust or pollen, building access or whether rainwater carries dirt from a roof. Treat the score as a weather-planning tool only.
What the score means
GO means the weather factors GoodDayTo measures look favourable for this activity. WAIT means conditions are mixed or another upcoming window looks better. NOT TODAY means the forecast currently contains enough unfavourable weather signals that this is a poor choice. These are planning recommendations, not guarantees or safety clearances.
Frequently asked questions
Why can a dry hour still get WAIT?
Because rain may arrive soon afterwards or the surrounding hours may be windier or less suitable. GoodDayTo looks for a useful multi-hour block.
Does humidity matter?
Higher humidity can slow drying, while lower humidity can help moisture leave the glass more quickly.
Is strong sunshine always good?
No. Hot glass can dry water and cleaning solution quickly, increasing the chance of streaks or marks.
Does GO mean it is safe to use a ladder?
No. Ladder safety, ground condition and working-at-height rules are outside the weather score.
Does the score know whether my windows are sheltered?
No. A sheltered window may be easier to clean than an exposed one under the same forecast.