During the 1 trip we took in the middle of Sept., I would describe the weather as sometimes being a bit windy. Looking at past weather patterns for the same time period seems to confirm this as being somewhat normal.

You might consider traveling early in the day, our progress was a bit slow going into the wind. While sitting at the end of the portage from Argo on the north side of crooked, a nearby tree actually fell over while we tried to decide if we should go out or not! I took a quick nap in my chair, and we departed an hour or so later, electing not to set up camp on the portage landing. We didn't have very far to go to catch a break from the wind thankfully, otherwise I would have stayed put.

Probably half of our trip had similar weather, but the souris handled it great.