average temperatures in dublin ireland
Average Temperatures in Dublin, Ireland. 1  The mean temperature in Dublin, Ireland is a little cool at 9.5 degrees Celsius (49.1 degrees Fahrenheit). 2  Mean monthly temperatures have a variation of 10 C (18 F) which is a low range. 3  There is a range/ variation of diurnal average temperatures of 6.4 C (11.6 F).