What happened: Mercedes-AMG F1 posted a weather-watch teaser ahead of the Monaco Grand Prix weekend, asking whether the principality's circuit will see its trademark Monégasque sunshine. The team pointed followers to its website for the full forecast rather than confirming conditions itself.

Why it matters: Monaco's tight, barrier-lined street layout makes weather a genuine performance variable: rain transforms the principality into one of the calendar's most treacherous and unpredictable races, where track position and tire calls outweigh raw pace. A dry, sunny weekend favors the usual qualifying-is-everything script, while any showers raise the stakes for every team.

What to watch: Watch the official forecast and Friday practice running for the first real read on grip and conditions through the weekend.