Weather in Republik Irlandia in September
Country-wide climate normals across 15 cities in Republik Irlandia.
How Hot Is Republik Irlandia in September?
Republik Irlandia's small geographic footprint means September is uniformly mild — typical 16°C highs nationwide.
Sunshine in Republik Irlandia in September
Limited sunshine and short daylight define Republik Irlandia's September: Dublin averages just 2.1h of direct sun, with the sun up between 7:00 am and 7:40 pm. The grey, overcast pattern is consistent across most of the country, with little regional variation in cloud cover.
Does It Rain In Republik Irlandia In September?
Moderate rainfall defines Republik Irlandia's September: Dublin averages 97mm across 13 days. Some regions see meaningfully wetter weather, especially coastal or mountain-facing areas, while continental interiors tend toward the drier end of the spectrum.
Is Republik Irlandia Humid In September?
Heavy oppressive humidity covers Republik Irlandia in September: 85% on average in Dublin, and similar saturating conditions exist nationwide. The air feels thick and heavy from sunrise to sundown, with little overnight respite. Coastal and tropical regions feel especially stifling.
Wind In Republik Irlandia In September
Persistent breeze shapes Republik Irlandia's September: 22 kph in Dublin, with consistent wind across the country. The conditions are ideal for sailing and other wind sports, but can be disruptive for fine outdoor work.
Cloud Cover In Republik Irlandia In September
Cloudy skies dominate Republik Irlandia in September — 73% cover in Dublin, with similar overcast conditions in most regions. Direct sun is patchy and broken; expect grey stretches between brief bright moments. Coastal areas may be heavier than inland.