# Clear Sky Stargazing — Cloud Forecast for Astronomy > Stargazing weather forecast with clarity score and viewing window. (iPhone/iPad app by heekyung moon.) - Source: https://appshunter.io/ios/app/clear-sky-stargazing/id6782402967 (this page in markdown: same URL + `.md`) - Developer: [heekyung moon](https://appshunter.io/developer/6779193748) - Category: Weather, Education - Price: Free - Rating: 5.00/5 from 1 App Store ratings - Age rating: 17+ - Requires: iOS 16.4 · 52 MB - Languages: American English - Released: 2026-06-24 - Data updated: 2026-08-22 - Monetization: ad-supported - User reviews in markdown: https://appshunter.io/ios/app/clear-sky-stargazing/id6782402967/reviews.md ## What is Clear Sky Stargazing? Don't drive to a dark site for nothing. Clear Sky Stargazing answers the one question every stargazer asks — "will the sky be clear tonight?" — with a single clarity score, an hour-by-hour breakdown of the night, and the best window to set up your telescope or just lie back and watch. Tonight's view opens on a clarity dial scored from Poor to Excellent, built from cloud cover, transparency, atmospheric seeing and the moon. WHAT YOU GET • Tonight's stargazing score — one clear rating for the night, with the conditions that drive it broken out into cloud, transparency, seeing and moon. • Best viewing window — the app finds the clearest stretch of dark hours tonight, when it starts and how long it lasts. • Hour-by-hour tonight — a strip across the dark hours showing the clarity score and low-cloud cover for each hour, so you can pick your moment. • 5-night outlook — clarity for the dark hours of the next five nights, so you can plan an observing session days ahead. • Sky conditions in depth — transparency (how faint the stars you'll see), seeing (how steady and crisp), moon interference (a bright moon washes out the Milky Way), astronomical twilight times, and an optics dew-risk read so you know whether to bring a dew heater. WHO IT'S FOR Amateur astronomers and telescope owners, astrophotographers, Milky Way and deep-sky observers, meteor and aurora watchers, and anyone who wants to know whether tonight is worth heading out for. HOW IT WORKS The clarity forecast is built from Open-Meteo cloud and visibility data plus the moon phase for your location. Enable location for your sky, or browse sample data offline. A NOTE ON ACCURACY Cloud, humidity and visibility are forecasts from a global weather model, not a measurement of your sky. Local fog, thin cirrus and light pollution aren't captured. This is a planning aid, not a guarantee — always look up. ## Key features - Clarity score for the night - Hour-by-hour sky conditions - Best viewing window identification - 5-night outlook - Detailed sky condition breakdown - Dew risk assessment ## Frequently asked questions about Clear Sky Stargazing ### What is the clarity score in Clear Sky Stargazing? The clarity score is a single rating for the night, ranging from Poor to Excellent. It's calculated based on cloud cover, transparency, atmospheric seeing, and the moon's phase to give you an overall indication of stargazing quality. ### Does Clear Sky Stargazing offer a long-term forecast? Yes, Clear Sky Stargazing provides a 5-night outlook. This allows you to plan your observing sessions days in advance, checking the clarity forecast for the dark hours ahead. ### How accurate is the Clear Sky Stargazing forecast? The forecast is built from global weather models for cloud and visibility, plus moon phase data. However, it's a planning aid and may not capture local conditions like fog or thin cirrus. Always look up for the most precise view. ### Can I use Clear Sky Stargazing offline? You can browse sample data offline within Clear Sky Stargazing. However, to get a personalized forecast based on your current location, you will need to enable location services. ### What specific sky conditions does Clear Sky Stargazing detail? Clear Sky Stargazing details transparency (faintness of visible stars), seeing (steadiness of the sky), moon interference, astronomical twilight times, and optics dew-risk. This comprehensive information helps you prepare for your observation. ### Does Clear Sky Stargazing have ads? Yes, Clear Sky Stargazing contains advertisements. These ads help support the development and maintenance of the app. ### What devices is Clear Sky Stargazing available on? Clear Sky Stargazing is currently supported on iPhone. It is designed to provide a clear and accessible stargazing forecast for iOS users. ### When was Clear Sky Stargazing last updated? Clear Sky Stargazing was last updated on July 28, 2026, with version 1.0.6. This indicates ongoing development and potential improvements to its forecasting capabilities. ## Version history (last 5 releases) ### 1.0.6 — 2026-07-28 Thanks for using our app! This update brings behind-the-scenes performance and stability improvements for a smoother, more reliable experience. Your support means the world to us. ### 1.0.5 — 2026-07-14 Thanks for using our app! This update brings behind-the-scenes performance and stability improvements for a smoother, more reliable experience. Your support means the world to us. ### 1.0.4 — 2026-07-11 New: save observing sites and compare tonight's sky quality, plus a Tonight's Planets card with peak altitude, time and direction. ### 1.0.3 — 2026-07-09 Improved search relevance, stability fixes and performance tuning. ### 1.0.2 — 2026-07-08 New: clear-night alerts! Turn them on and we'll notify you when an upcoming night looks great for stargazing — no more checking the forecast every evening. Plus stability improvements. ## More apps by heekyung moon - [Blur & Mosaic Privacy](https://appshunter.io/ios/app/blur-and-mosaic-privacy/id6779193648) - [Aurora Northern Lights](https://appshunter.io/ios/app/aurora-northern-lights/id6779193746) - [Golden Hour Sun Tracker](https://appshunter.io/ios/app/golden-hour-sun-tracker/id6779194270) - [GIF Maker & Editor Studio](https://appshunter.io/ios/app/gif-maker-and-editor-studio/id6779194430) - [Slow Shutter Long Exposure](https://appshunter.io/ios/app/slow-shutter-long-exposure/id6780141566) - [Rain Alert Nowcast](https://appshunter.io/ios/app/rain-alert-nowcast/id6780142286) All apps by heekyung moon: https://appshunter.io/developer/6779193748 ## Related topics [clear dark sky](https://appshunter.io/ios/topics/clear-dark-sky) · [clear clouds](https://appshunter.io/ios/topics/clear-clouds) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-22.*