As other have explained, it's the moisture in the air is what creates a haze. So, yes colder temps do generate a more visually "crisp" look. You'll also notice that sounds carries much further, this is also because there is less moisture in the air to slow down the sound.
scroti_mcboogerballs t1_j2l46b1 wrote
Reply to Does cold temperature make vistas more 'crisp' looking? by colorado_hick
As other have explained, it's the moisture in the air is what creates a haze. So, yes colder temps do generate a more visually "crisp" look. You'll also notice that sounds carries much further, this is also because there is less moisture in the air to slow down the sound.