Ireland In April 2025 Temperature. In april, the mean temperature in dublin is 49°f (maximum temperature is 52°f and minimum temperature is 45°f). The increase in air temperature is less dramatic in and around belfast, with 52°f (11°c) an average high.
In april, the weather has picked up, the days are longer and there are average highs of 13°c/55°f and average lows of 4°c/39.2°f. Daily high temperatures increase by 4°f, from 51°f to 56°f, rarely falling below 45°f or exceeding 62°f.