Best time to visit Dublin

July is the best month in Dublin, scoring 65 out of 100, with December the weakest at 31. The 34-point spread means timing is worth planning around without being decisive. The good window runs May to September — 5 months within ten points of the best.

July is the warmest month at 17.9 °C and January the coolest at 7.8 °C — a 10.1 °C spread across the year. It never reaches 30 °C in an average year, which takes heat off the list of reasons to avoid any particular month.

There is a real wet season here. January, July, August, October, November and December carry the rain — up to 18 wet days in a month — while April, May and September drop as low as 13. That 5-day gap is the biggest single difference between a good month and a bad one in Dublin, and it moves further than the temperature does.

Daylight swings hard — 17 hours at midsummer against 7.6 at midwinter. That 9.4-hour difference changes how much fits into a day more than the temperature does.

The three strongest months are July, September, August. The one to think twice about is December. Each month below has its own page with rainfall reliability, extremes, daylight and crowd levels.

Dublin month by month