Mercury Weather in September

Mercury in September sees pleasant temperatures, with highs around 18°C (64°F) and overnight lows of 7°C (45°F). Rainfall is fairly high at around 120 mm (4.7 in) on average, so pack waterproofs just in case.

Rainfall in Mercury in September

Historically, September sees about 12 days of rain, with a monthly average of 120 mm (4.7 in). Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.

Temperature in Mercury in September

If you're visiting Mercury in September, expect highs of 18°C (64°F) and overnight lows around 7°C (45°F). Temperatures can feel cooler in the morning and evening, so layering is often the best approach. Nights drop to 7°C (45°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet.

Sunshine in Mercury in September

The days are predominantly sunny, with an estimated total of around 191 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.

If you prefer dry days with pleasant temperatures, June, July and August typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.