Weather in Dublin in August

Shoulder season. August sits in between. You will get good days and you will lose some. You should expect rain on 17 days of the month, which is more days wet than dry.

August ranks 3 of 12 in Dublin. Only July scores clearly higher, and the difference is small enough to be settled by price rather than weather.

This is persistent light rain rather than storms: 17 wet days but only 2 heavy ones. It rarely cancels anything outright, and it rarely fully clears either. A jacket beats an umbrella. Pack for 17.9 °C days and 12.4 °C nights; the spread matters more here than any single number.

What the averages hide

Averages flatten a month, and this one hides a few things: the day barely swings — 5.4 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest August day reached 24 °C and the coldest night fell to 8.8 °C, and the wettest single day dropped 41 mm — roughly 45% of the month's rain in one day.

August is statistically steady but not small: the year-to-year variation is modest in relative terms, yet the wettest August on record still delivered 170 mm against 15 mm in the driest. In a month this wet, even a tame spread is a lot of rain in absolute terms — the 91 mm average is a reasonable planning figure, not a promise.

Wind is light at 13.6 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 86%, high enough to notice on the warm days without dominating them.

How August sits in the year

Temperatures hold steady either side: 17.9 °C in July, 17.9 here, 16.3 in September. Nothing about the timing within the month matters much.

Daylight in August

14.9 hours of daylight, losing 1.9 hours across the month. That is between Dublin's extremes of 17 and 7.6 hours, so days are long enough not to constrain the plan.

An inland climate

Despite being inland, the year stays fairly even: 13.9 °C between the year's warmest afternoons and coldest nights.

How busy it gets

Peak season. Expect the highest prices of the year and to be booking well ahead.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

August in Dublin versus nearby

If Dublin is one option among several, the nearby comparison is worth making. Galway is close enough to be a coin toss — within a degree on temperature, 3 days more rain. Cork is close enough to be a coin toss — within a degree on temperature, 1 day more rain.

So: August is effectively as good as it gets here — 2 points behind July, which is inside the margin where the weather stops being the deciding factor and price starts being it.

Every month in Dublin

See all twelve months in Dublin, or where else to go in August.