🪟 Window Weather

A simple answer to: “Should I open the windows?”
Open windows looking out onto trees and blue sky
Fresh air starts with the right moment.
Current Air Score—/100
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Getting local conditions…
Air Score scale
0 · Worst2550 · Fair75100 · Best
Temperature
—
Outdoor temperature
Relative humidity
—
How saturated the air is
Dew point
—
A direct moisture indicator
Air quality
—
Outdoor pollution
Allergens
—
Pollen / mold
Current location
New York, NY
Default location
Enter a five-digit U.S. ZIP code to choose a location.

Window notifications

Get a notification when a worthwhile window-opening opportunity begins. Nothing is requested until you choose Enable.
Notifications are off.
Live opportunity alerts can run while this page is open. Full background push is a later backend step.

Ventilation sensitivity Updates live

ConservativeMore opportunities
Only alert when outdoor conditions are clearly better.

Indoor conditions

Use your own indoor readings, or let Window Weather estimate them.
When selected, Window Weather assumes indoor conditions are relatively stable. Uncheck this to use a passive estimate that follows recent outdoor conditions more closely.
Currently using Window Weather’s estimated indoor conditions.

Allergen sensitivity

LowHigh
Average sensitivity (default).

Next 12 hours (Outdoor Conditions)

Temperature and Air Quality readings below are outdoor conditions. The hourly Window Air Score also reflects your selected indoor-condition assumptions.
Prototype weather and Air Quality Index data: Open-Meteo. ZIP lookup: Zippopotam.us with Open-Meteo fallback. Allergen data: licensed pollen feed when connected; otherwise a Window Weather seasonal estimate. Browser notifications are optional and are never requested automatically. When enabled, Window Weather checks for new opportunities while this page is open, subject to browser background limits. Full background push requires a configured service-worker push backend. This prototype is not an emergency warning service.