Our months vary - if we are volunteering like we are now, we will be in each of three Oregon State Parks one per month until January when we will stay 2 months, then travel to another park for a month, take a month & a half off before either volunteering at our Home Base or taking the summer off .. will be traveling approx. 100 miles between volunteer sites, and going places we have not been before.
Previously we have stayed 2-3 months wherever we volunteer, so there is no "normal month" for us.
A delightful aspect of full-timing for us is that there is no 'normal'.