I'm getting ready to go back to the West Highlands next week so I thought I'd make a 'will it be raining when I'm in the West Highlands, and will I be able to see Ben Nevis this time, and also do I need my waterproofs?' map

try and find a year when it doesn't look like this!

https://eip.ceh.ac.uk/rainfall 

and yes this is an attempt to capture some kind of rain shadow vibe

the data are available separately for Northern Ireland, so here's what it looks like

here's a better quality version of rainfall in Northern Ireland that I left running overnight

(verdict: also wet, but not so much in the middle)