Saint-Barthélemy (VdA) stargazing forecast — Saturday, August 15

Aosta Valley, Italy · Bortle 3 · 45.810, 7.480 · Snapshot generated Sat, 15 Aug 2026 02:05:09 GMT

Poor (Medium confidence)

No sustained clear window; brief gaps possible (min cloud 7%).

Best observing window tonight

Sun 12:00 a.m. – Sun 12:00 a.m. (1h, 7% mean cloud)

Astronomical night: Sat 10:38 p.m. → Sun 8:31 a.m.
Moon: Waxing crescent · 7% illuminated
Mean cloud (during night): 77% (min 7%)

Site

The Osservatorio Astronomico della Valle d'Aosta sits at 1,675 m in the Italian Alps. It's Italy's most active public star-party venue, with a planetarium and multiple public telescopes.

Drive from Toronto: ≈ 1 h from Aosta up the SR36 to Lignan/Saint-Barthélemy.

Best time of year: May–October for accessible mountain roads; winter observing programmes run for those staying in Lignan.

Open the live 48-hour forecast →

Citations & data sources

Open-Meteo Forecast API (cloud, humidity, wind, visibility)
Open-Meteo astronomical data (sunrise, sunset, moon)
Bortle scale reference for site darkness
Editorial guide for Saint-Barthélemy (VdA): /sites/saint-barthelemy-observatory.txt
Structured site data: /sites/saint-barthelemy-observatory.json
Live MCP server (AI agents): https://koohxdehsweadgdegrly.supabase.co/functions/v1/mcp

This is a build-time snapshot — the live forecast at https://ontarionightsky.com/?site=saint-barthelemy-observatory updates continuously.