Depends on your area, much of texas is about prime for rut as we speak. Further north you go the earlier rut hits, father south the later. Mostly tho, get in the woods regardless. Cold days with little wind and clear skys out of the rut make for a better day than a warm rainy and windy day in the rut.

Here is a link to the rut-explained on TPWD.com

http://www.tpwd.state.tx.us/huntwild/hunt/planning/rut_whitetailed_deer/table/#hill