Christmas is coming and you might want to put some effects on your web page.

Make it snow on your Wordpress site this Winter with Snow Flurry. Simple and fully customizable snow effect plugin.

Decorative purposes plugin: Snow effect on your blog. A lightweight, hassle free experience.

The best (snow)flakes animation for WordPress.

Snow falling animation. Personal customization of snowflakes and their movement. The script runs only during the period of time you want.