From the introduction: Icewind Dale is an area of arctic tundra in the far north reaches of Faerûn. Renowned for being the northernmost explored region of Faerûn, Icewind Dale is a cold and bitter environment, rarely reaching 70 degrees Fahrenheit during the warming summer months, when the average temperature hovers in the 40s to 50s. During the blood-chilling months of winter, Icewind Dale’s temperature can plummet down to -40 degree Fahrenheit with the average temperature in teens and 20s.