A lot of stuff changes between summer and winter. In the summer, clothing is light and gloves are rare. During the winter, there's a lot more clothing involved and having a trigger guard that's big enough to allow gloved shooting can be helpful. During the summer, an IWB carried gun is often just covered by an untucked shirt. During the winter, that same IWB gun can take some serious time to get to if it's under heavy jackets and layered clothing.
Why would you change your carry gun because it's cold outside?
What is you edc in the winter, and what do you edc in the summer time. Thanks for the input.