In Sweden rain takes itself seriously, if it rains, it rains. In Ireland the rain can't quite make up it's mind, it can rain for 15 minutes, take a break for an hour and then rain again.
For example, it rained whole night today in Stockholm and it will continue raining for some time. You can plan for it and you can count on the rain to be raining for a while.
In Ireland, it would have rained some during the night, then a little in the morning, there could have been a downpour during the day and a drizzle in the evening. With Irish rain, you never know what can happen.