SunWhen was created with a simple goal: to help people make the most of sunny weather. Whether you're planning a picnic, scheduling outdoor photography, or just want to know when to step outside for some vitamin D, SunWhen gives you the information you need.
We believe everyone deserves to enjoy the sunshine, and knowing when it will appear shouldn't require checking multiple weather apps or deciphering complex forecasts.
SunWhen combines real-time weather data with astronomical calculations to predict exactly when the sun will be visible at your location. Our app analyzes:
The result is a simple, easy-to-understand prediction of when you'll next see clear skies and sunshine.
Traditional weather apps tell you about temperature, precipitation, and general conditions. But they don't answer the simple question: "When will I actually see the sun?"
SunWhen fills this gap by focusing specifically on sun visibility. We filter out the noise and give you exactly what you need to plan sun-dependent activities.
SunWhen is built using modern web technologies and relies on the Open-Meteo API for weather data. Open-Meteo provides high-quality, open-source weather forecasts that are updated hourly.
Our prediction algorithm considers cloud cover thresholds, daylight hours, and forecast reliability to give you accurate sun visibility predictions.
SunWhen is completely free to use. We believe weather information should be accessible to everyone. The service is supported by advertising, which allows us to keep it free while covering our operating costs.
We take your privacy seriously. Your location data is only used to fetch weather forecasts and is never stored on our servers. We don't track your movements or sell your data. Read our full Privacy Policy for more details.
Have questions, feedback, or suggestions? We'd love to hear from you. SunWhen is constantly improving based on user feedback.
Email: hello@sunwhen.com