IR is attenuated in rain and fog, and I would presume snow as well. In many situations, there's no difference in resolution between IR sensors and human vision.

IR is attenuated in rain and fog, and I would presume snow as well. In many situations, there's no difference in resolution between IR sensors and human vision. [0] [0] - https://www.flirmedia.com/MMC/CVS/Tech_Notes/TN_0001_EN.pdf https://www.flirmedia.com/MMC/CVS/Tech_Notes/TN_0001_EN.pdf