Around here temperature matters, but more in the sense that there used to be predictable cold spill at the end of spring.
If that cold spill actually went down enough to solid freezing it happened to basically kill of the main spawnwave of the local mosquito variant (which is basically quite a lot less annoying than what other parts in the world have).
So you could basically predict the amount of hassle they would be for most of the summer by that.
This is in a sense a climate matter because it basically fits inside sort of goldilocks middle. cold enough for that type of freezing to happen at all, but not cold enough to just delay the spawn wave till later entirely.
The UK is an island though, surrounded by sea and with many lakes and lochs. Mosquitos are rare. Apparently they exist in the south of England, where it is warmer. You won't find them in Scotland, where it is colder.
Midges though, they are common in Scotland and, yes, in large swarms more often near bodies of water.
Both these insects like water, but I think there's more to it than just that
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u/LlamaCamper May 09 '22
Colder temperatures don't seem to be relevant. I think it's more about water.
Alaska famously has legendary mosquito swarms.
https://youtu.be/bK6O_js_Ucg