The pronounced warming in winter and spring are not accompanied by increases in humidity. (skepticalscience.com)
Your statement does not consider where all of the heat is consumed by increases in humidity. (wattsupwiththat.com)
The most prominent branches in snow crystals often occur at the same distance from the center of the crystal on each main arm, and probably are started by an abrupt increase in the humidity of the air through which the growing crystal is falling. (scientificamerican.com)