Dublin, the capital of Ireland, sits on the east coast at the mouth of the River Liffey on the Irish Sea, sheltered somewhat by the Wicklow Mountains to its south, at approximately 53.35°N, 6.26°W. It has a temperate oceanic climate (Köppen Cfb) — mild, changeable and cloudy — but its position on the drier eastern side of Ireland, in the lee of the mountains that catch the worst of the Atlantic weather, makes it markedly less wet than the west of the country.

Summer, from June to August, is mild and cool rather than warm, with July and August the warmest months — average highs around 19–20°C and cool nights. Genuinely hot days are rare, though warm spells occasionally push temperatures into the mid-20s. The far-northern latitude brings long summer days, with light lingering late into the evening, and it is among the drier, brighter parts of the year, albeit still changeable.

Winter, from December to February, is mild and damp rather than cold, kept above freezing much of the time by the surrounding sea, with January and February the coolest — average highs around 8°C and lows near 3°C. Hard frost and lying snow are relatively uncommon in the city, so winters are more often grey, wet and breezy, shaped by Atlantic fronts, than genuinely icy.

Dublin is one of the drier parts of Ireland, receiving only around 730–760 mm of rain a year — far less than the Atlantic-battered west coast — thanks to its eastern position and the sheltering Wicklow Mountains. Rain falls on many days but is usually light and spread through the year, with an autumn and winter maximum. Live rainfall, humidity, and pressure readings for the city are shown in the panels above.

Dublin's weather is characteristically soft and grey — defined by the frequency of light rain, cloud and changeable Atlantic conditions rather than by any extremes. Its comparatively dry, sheltered eastern setting sets it apart from the far wetter west of Ireland, though autumn and winter Atlantic storms still bring spells of wind and heavier rain, and the surrounding sea keeps the city mild year-round.

To follow any single measurement in Dublin more closely, use our live instruments: the online barometer for atmospheric pressure, the thermometer for temperature, the hygrometer for humidity, the anemometer for wind speed, the wind vane for wind direction, and the rain gauge for rainfall.