Will the sky be clear tonight?
Average cloud cover for the next twelve hours is 52%. Patches will block portions of the sky. Stick to brighter targets and watch the chart for clearer windows. Moon is 69% illuminated.
Data source
Forecast hourly from Open-Meteo (free, no API key, refreshed every hour). Cloud cover is total opacity — low, mid, and high cloud combined. Updates every hour at the edge.
Transparency
Estimated 1–10 from cloud cover and humidity. Real transparency depends on aerosol load, smoke, and water vapor profile — none directly measured here. Treat as a relative ranking, not an absolute score.
Seeing
Estimated 1–10 from surface wind speed only. Actual seeing is governed by the jet stream and local atmospheric profile — surface wind is a coarse proxy. For high-resolution planetary work, cross-check with sites that model upper-atmospheric turbulence.