When Lucy and Zach are standing at the top of the pier in the final segment, the rain is visible hitting the ground in the long shots. It is not raining in the close-up shots, and Lucy and Zach are not getting wet in either the long shots or close-ups.
After the sleigh ride, Lucy and Zach are standing outside when it is snowing. In certain angles, the snow is seen sticking to Zach's hair. In other angles, there is no snow sticking to his hair.