5. Use more conditioner in the shower: Hair strands are semi-permeable, so when there’s moisture in the air, it wants to move into the strand to balance things out. As the moisture pushes in, it causes the hair cuticle to expand, and you get frizz. To prevent this from happening, hydrate your hair from the inside, out — in the shower. (If you wait until after you style to coat strands with an anti-frizz spray or serum, it’s already too late.)
Get into the routine of using extra conditioner to counteract damaging cold weather. Not only should you condition more often, but if your hair is dry and thick enough, you may want to skip shampoo altogether for at least one weekly "washing."
6. Seal it with oil: Coat hair with a light layer of oil to seal and protect it from the elements. Products with jojoba and almond oils will add shine; coconut oil and shea butter are perfect for coarser hair types.
7. Treat your hair: Cooler months provide the perfect time to use intense, reparative masks. Apply a generous layer of a deep conditioner on dry hair, and leave it on for at least 20 minutes to fully absorb, or sleep with it in for best results.
Here are some more weather-related hairy situations, and how to combat them:
Culprit: Dry Air
Your defense: Common dryer sheet
Cold air is denser than warm air, which means there's less room for water vapor, which means it's drier. Drier air means objects are more likely to build up electrical charges on their surface when they rub together. Translation: Winter makes hair static-y. The classic stylist tip? Wipe a dryer sheet over your hair before heading out the door.
Culprit: Cold temps and central heat
Condition: Dry Scalp
Your defense: Tea tree or olive oil
Biting temperatures outdoors and central heat indoors strip skin cells of moisture, including those on your scalp. You can keep embarrassing layers of "snow" off your shoulders by investing in a shampoo and conditioner with tea tree oil (like Paul Mitchell's Tea Tree line, $15 each for shampoo and conditioner). Home remedies like massaging lukewarm olive oil into your scalp and letting it soak for 30 minutes can also relieve scalp dryness.