Children in day care centres do not play outside when the windchill is 1700 or higher. You should not send small children outdoors to play when it is this cold. Normal winter clothing is generally adequate. Pleasant conditions for outdoor activities. 1700-1900 Warm winter clothing is recommended.
Most outdoor activities are unpleasant without facial protection.
Exposed flesh will freeze with prolonged exposure. Warm winter clothing is essential. Facial protection is recommended. Outdoor activities such as skiing and walking not recommended. Travel without adequate precautions not recommended.