There is a theory out there about cold weather and what it does to our calorie burning. I tend to believe this one over the hot weather version.
The theory is that you burn more calories in cold weather (or just in the cold) than you do in hot. The reason is your body needs to work to maintain it’s steady 37C core temperature. When you’re out in the cold and you’re shivering because you’re cold and you get goosebumps, they are ways that your body is saying it’s cold and is trying to warm itself up. It takes a fair amount of energy to warm up water. Now, since our bodies are mostly made up of water, it takes a lot of energy to warm up the water in our bodies and to maintain that temperature. I’ve been trying the theory out of standing out in the cold doing my exercises.. I’m definitely not saying to the extent where I’m harming myself by giving myself a cold or the sniffles from being out in the snow or the rain.. No. Just on a clear, calm day when there isn’t a wind chill problem. Don’t treat unhealthy ‘cold’ weather as a good plan.. use your common sense.
The other theory, and one that I enjoy doing, is drinking cold water burns more calories than drinking room temperature. Same general theory exists here. It takes a lot of energy to warm cold water, so when you drink it, it takes your body more energy - essentially more calories, to heat up the ingested water to a suitable body temperature level so that it can be digested properly. We’re not talking like 2 times the calories by working out in the cold (or just standing in it)… but there is a slight difference. Makes sense to me… and I studied science at uni!