I am having an outdoor wedding in dana point, ca on January 1st. What's the weather like? ?

You're asking us to predict the weather on January 1? That's a bit of a reach. Generally, temps are cool, in the upper 30's/low 40's at night, and anywhere between 50 and 70 during the day. It hardly ever seems to rain here on New Years, as evidenced by the Pasadena Rose Parade. So expect very cool temps with little chance of rain.