Posted up on the bulletin board, there is a slightly crumpled, square piece of cardboard that has the days of the month written on it. At the top, the current month says it's September, with the listing of each day's weather beneath it.
http://fillydelphia.com/content/daily-weather-plan
there is also a flyer tacked onto the board, that reads:
ATTENTION ALL PEGASI!
Interested in becoming a weather pony? Well, now's your chance! Stop on by Town Hall and sign up for your chance to be a part of taking care of Ponyville's weather! Sign-ups are always happening, so feel free to stop by and pitch in!
(( Just PUB Rainbow Dash once you signed up to let her know! ))