The sun emits around 1.4KW of energy per square meter. At the Earth’s surface. At ocean altitude. Sunlight is warm, because it’s a shitload of energy.

Any effect experienced beyond directly feeling it does happen, too. I forgot the name of the phenomenon where seeing something reminds you of how it feels, but that happens because sunlight is warm. Very, very warm.

I want to say the phenomenon is something like synesthesia, but I think there’s a more specific term for the general memory engram referencing effect? Maybe I’m overthinking it.

Light actually warms you. The colors you see are the ones being absorbed while the other ones are just absorbed and turned to heat. Especially with black clothing you will feel warmer.

I remember reading that on two equally warm days, the day where it’s sunny will be perceived as being 1-2 C warmer compared to the overcast day, even though the temperatures are the same. I cannot remember where I read this it was over ten years ago

Acknowledged OP edit aside…

I can’t say I’ve experienced that illusion myself. I do wonder if there’s something to your question that has to do with Circadian Rhythm or waking up more when you see sunlight.