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July is Dublin's warmest and busiest month and the forum's advice is almost entirely about clothes. Daytime temperatures across the month run anywhere from about 14 to 27C, and the honest summary is that they cannot be predicted: expect rain and sunshine inside a few hours, and carry a light rain jacket regardless, because it will rain. July and August are also the worst of the crowds, with May and September named as the alternative that trades a little warmth for a lot of space. The record: 20.8C days that feel like 20C, 12.7C nights, 11.3 precipitation days carrying 68.1mm and a 16.4-hour day.

Regulars call this a genuinely lovely month, with long, bright days and temperatures that rarely turn genuinely cold, calling it usually one of the more consistent months weather-wise here - though the standard caveat holds that Irish weather can never be fully trusted. Our row backs the mild read, 16.9C over 8.3C nights feeling 6C, with 45.7mm of rain across 9.5 days. Regulars describe a single day capable of running cool, rainy, sunny and warm in turn, so layers plus a waterproof jacket or umbrella remain the standard advice even in this comparatively reliable month. The sea sits at a cool 13.8C. The record: humidity 78 percent, 11.1 hours of sun, an 18.4 kph wind and AQI 39.

The only thing regulars will guarantee about June here is the light: bright from just after five in the morning and still bright at half past ten at night. Our daylight column says 16.9 hours; their eighteen counts the long twilight either side, which in fine weather is usable time. The weather inside it changes within the hour, from sunshine to downpour and back, so layers and a rain shell whatever the forecast says - our 58.7mm falls across 10.5 days. Temperatures are mild rather than warm, 19.2C over 11C. Bloomsday is the 16th and is smaller than visitors expect. The record: humidity 77 percent, 10.8 hours of sun and AQI 35.

Sunshine and showers is the phrase regulars keep for August here, with the note that thundery short downpours are likelier this month than any other and that nobody knows anything until it arrives. Our row is kinder than the figures they quote - 20.5C over 12.5C against their 15 to 18C and lows in the single digits, which describes a cold late-August night rather than a normal one. Rain falls 60.4mm across 11 days, about five millimetres a time: showers, as advertised. Their packing list is a hooded lightweight waterproof rather than an umbrella, layers, and something for a cool night. A 20.2 kph wind is why the hood matters. The record: humidity 79 percent, 9.4 hours of sun and AQI 30.

Dublin forum threads describe January as reliably wet, damp and overcast, with average temperatures hovering around the high-40s Fahrenheit, but posters were quick to point out it rarely gets bitterly cold the way continental winters can - some bright spells and even occasional sleet or a touch of snow break up the grey rather than defining the month. The bigger practical concern raised repeatedly was the short daylight, with posters noting the sun barely fully up by 8am and full dark again by 4pm. The consistent advice: the city itself handles winter well with plenty of indoor options - museums, theatres, pubs - but a countryside day trip in January means planning around cold, wet and genuinely dark conditions.