When is it too early to have a baby shower?

Aggie
I'm due February 2 and I was thinking about having my baby shower in January. Then I got to thinking why not November before the holidays and less chance of snow? But my mom has informed me "that's too early...but it's my party and I can do whatever I want". Another issue I'm running into is two of my sister inlaws are pregnant as well. One due in November but she's thinking later October and the other is due December but thinking late November. Help! I need advice.