Forecast Says: Low clouds
Tress Management: Humidity can cause even the straightest of strands to frizz. The key to reining in flyaways is blow-drying with a round boar-bristle brush—best for smoothing out the hair cuticle and reducing unruliness. Apply a volumizing product from roots to ends, then section hair and flat-iron. Finish with an anti-humectant, which keeps moisture from penetrating. Headwrap, jenniferbehr.com.
DIY Factor: If your blowout skills are on par with a pro’s, then go for it.
Product Pick: Blow Weather Girl predicts you’ll have sleek strands, thanks to its lightweight formulation applied post blow-dry, $22.