Might be to late to find a weather person to teach about winter weather.
Would be fun to have some of the instant snow for them to watch.
http://www.stevespanglerscience.com/product/instant-snow
Serve snow cones and make winter car survival kits.
Games
Snowball Relay Race
Supplies: Styrofoam ball for each team Pencil for each team
How To Play: Divide into teams. First child on each team will be given a styrofoam ball (snowball) and a pencil. On your mark they are to bend over, place the ball on the floor, and push the ball with the pencil across the room, around an obstacle, and back to next child on team. First team to finish wins.
Snowball Making
Supplies: Large sheets of tissue paper, one for every child Bucket for each team
How To Play: Divide the children into two teams. The first person on each team gets a piece of tissue paper and crumples it into a ball using one hand (this keeps them soft). Child then places the snowball in the bucket. The next child repeats the first childÃ*s actions and the process continues until the team has all their snowballs made. Follow this game with a Snowball Throw.
Snowball Throw
Supplies: A line drawn or taped on the floor
How To Play: Set a time for 2-3 minutes. Yell, "GO"! Each team throws their tissue paper snowballs back and forth across the lines. When the timer goes off, the team with the least amount of snowballs on their side wins.