Should I wait to book my flight?

My husband and I are flying to Reno, NV in early March. We are flying Southwest out of Milwaukee, WI. Right now the flights are 218/person to Reno, and 154/person to fly back. It just recently went up in price and I was wondering if there is a certain day of the week I should book, or if I should wait until February. I know that booking 2 weeks before is a bad idea. Let me know what you think!