"When all is said and done, the weather and love are the two elements about which one can never be sure," wrote novelist Alice Hoffman. You've done your best to make sure about the love; we'll try to help with the weather. Not by predicting rain or sunshine on your wedding day, but with tips on keeping your hair looking good regardless of the conditions.
Excess moisture is the enemy of shine, especially if your hair's already prone to frizz. The cuticle fattens up from the water in the air and loses its smooth, reflective surface. To prepare for a humid forecast, add or switch to an acidifier conditioner. The mild acids tighten the cuticle, while the oils and silicones form a barrier against moisture. On the Big Day itself, hit up your hair with a double shot of serum or oil before styling.
Dry air is not necessarily a friend to hair either. A lack of moisture can cause the opposite problem: dry, brittle hair with static electricity that fights your best styling efforts like the ring bearer being dressed in his tuxedo. The remedy again is conditioner, this time to lock in moisture. Plump your hair with a conditioner that contains palm oil or coconut oil, which have fatty alcohols that soften hair.