Sillian Weather in September

September in Sillian brings moderate temperatures, with highs of 14°C (57°F) and nights dropping to 4°C (39°F). Rainfall is on the higher side this month, averaging around 124 mm (4.9 in), so keep a rain jacket handy.

Rainfall in Sillian in September

You can expect rain on roughly 14 days based on historical data, averaging 124 mm (4.9 in) for the month. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.

Temperature in Sillian in September

Temperatures in Sillian in September top out at 14°C (57°F) and drop to 4°C (39°F) overnight. This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. At 4°C (39°F) overnight, it gets properly cold after dark. On the bright side, cold nights tend to make for excellent sleeping conditions.

Sunshine in Sillian in September

The month enjoys around 196 hours of sunshine, creating mostly sunny days despite the cool temperatures.

If you prefer enjoying temperate temperatures and rain-free days, 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.