To ask if this would work

[cardigankitty]

Am unsure and packing for week away where it’ll be 18 degrees and dry. Can I get away with long dress and trainers with no tights during day or will I be cold? Can’t decide so looking for opinions!

Definitely, yes.

Yes, that sounds fine.

Why so much angst over this OP? What’s bothering you?

Gently, how would we know, OP? I'd be fine in a long dress and a cardigan, my aunt would definitely want to wear trousers and a jacket in the same temperature, my partner and kiddo usually wear shorts and t-shirts until temperatures drop to below 10

A pair of tights doesn't take up much space - chuck some in the bag if you aren't sure!

Depends on what you'll be doing.

I'd take something to go under the dress (tights / leggings) just in case as it can get nippy this time of year when you stay still for a while.