Depends on your level of fitness starting out. If you're not trim/cut already, with solid diet and increased exercise it's definitely possible. If you're pretty low BF% already, short of massive dehydration and some high-level nutrition tweaking, I'd say no.
Example: Junior year, I weighed ~185 during football season. I wrestled at 160. Made the cut in about four weeks and I was fairly fit from football, but the huge increase in workouts and changed diet for wrestling season made it so the first 20 pounds came easy - first 2 weeks - and only the last 5 pounds were tough. Wrestling has day-of weigh-ins, didn't feel like my performance was affected.