# Open Window Today

> Your home, smarter every day. 32 instant Yes/No decisions powered by live weather, air quality, UV, pollen and pressure data.

## What is Open Window Today?

Open Window Today is a free web application that transforms raw weather data into actionable home decisions. Instead of showing numbers and charts, it gives users clear Yes, No, or Wait answers to 32 common daily questions like "Should I open my windows?", "Can I dry clothes outside?", "Is it safe for my asthma today?", and "Should I paint outdoors?".

The tool reads 8 live environmental signals — AQI (Air Quality Index), temperature, humidity, wind speed, barometric pressure, UV index, rain status, and estimated pollen risk — then applies evidence-based thresholds to each of 32 cards across 6 categories: Home & Indoors, Health & Body, Family & Kids, Garden, Outdoors & Fitness, and Home Maintenance.

## URL

https://openwindowtoday.com

## Key Features

- 32 live decision cards with Yes/No/Wait verdicts
- Real-time air quality (AQI from PM2.5), temperature, humidity, wind, UV, pressure, and pollen data
- 48-hour forecast with per-slot card recalculation
- Suburb-level precision geocoding (not city-centre averages)
- 8 languages: English, Spanish, French, German, Hindi, Arabic, Japanese, Chinese
- Works in 120+ countries worldwide
- No sign-in required for core features
- Dark mode support
- Shareable card images for WhatsApp, X, Facebook, Telegram
- Progressive Web App — installable on mobile

## Categories and Cards

### Home & Indoors
- Open your windows? (AQI, humidity, temperature, rain thresholds)
- Dry clothes outside? (humidity, wind, rain)
- Sleep with window open? (AQI, temperature, humidity overnight)
- Good day to deep clean? (humidity, rain)
- Ventilate your home now? (AQI, wind, rain)
- Damp risk indoors today? (humidity, temperature)

### Health & Body
- Hay fever warning today? (estimated pollen from temp, humidity, wind)
- Put sunscreen on today? (estimated UV from cloud cover)
- Migraine risk today? (barometric pressure change over 6 hours)
- Safe for asthma today? (AQI, cold air, humidity)
- Safe for elderly outdoors? (temperature, wind, AQI)
- Good day for outdoor exercise? (AQI, temperature, humidity, wind)

### Family & Kids
- Pool day? (temperature, UV, rain)
- Kids play outside safely? (AQI, UV, temperature, rain)
- Bike to work today? (AQI, rain, wind, temperature)
- Camping tonight? (rain, snow, temperature, wind)
- Good stargazing conditions? (cloud cover, moon phase)

### Garden
- Water the garden today? (rain, humidity, temperature)
- Good day to mow the lawn? (rain, wind, humidity)
- Bring potted plants inside? (temperature, wind, frost risk)
- Apply fertiliser today? (rain, wind, temperature)
- Mosquito warning tonight? (temperature, humidity)

### Outdoors & Fitness
- Good running conditions? (AQI, temperature, humidity, wind)
- Beach day? (temperature, wind, UV, rain)

### Home Maintenance
- OK to paint outdoors today? (temperature, humidity, rain, wind)
- Run the dehumidifier? (humidity, temperature)
- Good solar panel generation day? (cloud cover)
- Good day to wash the car? (rain, humidity, wind, temperature)
- Light the fireplace tonight? (temperature, rain, wind)
- Safe for a bonfire tonight? (wind, rain, humidity)

## How Thresholds Work

Each card has specific scientific or practical thresholds. For example:
- **Open windows**: AQI < 100, humidity ≤ 65%, temperature 15–30°C, no rain
- **Migraine risk**: Pressure drop > 6 hPa over 6 hours = medium risk; > 10 hPa = high risk
- **Asthma safety**: AQI > 100 or temperature < 5°C = high risk
- **Outdoor paint**: Temperature 10–30°C, humidity < 70%, wind < 20 km/h, no rain

## Data Sources

- Weather data: OpenWeatherMap API (current conditions + 48-hour forecast)
- Air quality: OpenWeatherMap Air Pollution API (PM2.5 → US EPA AQI conversion)
- UV Index: Estimated from cloud cover percentage (not direct sensor)
- Pollen: Estimated from temperature, humidity, and wind proxies (not live sensor data)
- Geocoding: OpenWeatherMap Geocoding API with suburb-level precision

## Pricing

- **Free tier**: All 32 cards, unlimited searches, no sign-in required
- **Premium ($7.99/month)**: Hourly breakdown per card, daily email digest, 7-day history, condition alerts, city comparison, unlimited saved cities. 7-day free trial.

## Technical Details

- Static site hosted on GitHub Pages
- No backend server — all API calls from client-side JavaScript
- Firebase Authentication for user accounts
- Stripe for payment processing
- Progressive Web App with offline support
- Google Analytics (GA4) for anonymous usage metrics

## Contact

- Website: https://openwindowtoday.com
- Feedback: Available via in-app feedback widget
- Support: https://buymeacoffee.com/brewandbuild

## Pages

- Home: https://openwindowtoday.com/
- How it works: https://openwindowtoday.com/how-it-works.html
- FAQs: https://openwindowtoday.com/faqs.html
- About: https://openwindowtoday.com/about.html
- Privacy: https://openwindowtoday.com/privacy.html
- Terms: https://openwindowtoday.com/terms.html