30°F – 40°F
Green Zone
It’s chilly but tolerable when dressed properly (think layers, gloves, and a hat). But kids should stay outside for only two hours, max, and take a break every 30 to 45 minutes to warm up.
20°F – 30°F
Yellow Zone
It’s pretty darn cold, so add a thicker hat and pair of gloves and wool socks. Kids shouldn’t stay outside for more than one hour, and should take regular breaks.
Below 20°F
Red Zone
Kids should be outside for only brief periods in the bitter cold. Outfit ’em with long johns, a face mask, and earmuffs.