How to dress baby in 22 degree celcius weather during the day?

[Boo2400]

I can only seem to find advice for sleep, including sleep sacks with tog etc. But I'm struggling with the day time.
It has been 22 degree celcius outside, which feels very warm for the UK haha. I have been dressing my 5 week old in a short sleeve vest/bodysuit and a long sleeve onesie/sleep suit. Should I be losing the vest?
I dont want him to be too hot

One more layer than you. A sling counts as a layer.
If he's lying in a pram then he will get colder than you walking about so may need a light blanket too.

So keep the vest indoors? And possibly add a blanket outside?

I would have him in a vest and onesie inside, and if he is lying still and shaded in a pram pop on a light blanket outside.

22 degrees is the air temperature in the shade, it will be warmer in the sun.

I have a July baby and experienced similar weather. Short sleeve vest and regular babygrow was what I did indoors. Still used a light blanket and light hat when outdoors and in the pram. Baby is never directly in the sun so still felt cool enough in the shade and can be quite breezy, even with that sort of temperature. Only time I stripped down to vest was sometimes when indoors got really sunny and hot (partial glass roof so tends to heat up.) Best to feel baby's back and chest (not their hands or feet) with the back of your hand to gauge. If they feel cool, add a layer. If they're any way sweaty they're too hot. I found DS would get sweaty in his hair when it heated up so that was a good indicator.