Endure Elements

Neither the biting cold nor the searing heat troubles you anymore. You travel in arctic or desert wastes as comfortably as in temperate climes.

Component Cost: 20 gp
Market Price: 100 gp
Key Skill: Arcana or Nature (no check)
Level: 2
Category: Exploration
Time: 10 minutes
Duration: 24 hours

The Endure Elements ritual lets you designate up to five ritual participants, including yourself, who ignore penalties associated with extremes of nonmagical weather.
    An affected creature suffers no ill effects from ambient temperatures between –50 and 140 degrees Fahrenheit, and the creature’s equipment is likewise protected from the ravages of these temperatures and of precipitation.

Published in Player's Handbook, page(s) 304.