Yes, those are pullets. Depending on breed, they may be laying or just getting ready to start. Or they might need another month.
I don't know where you are or how many hours of daylight they are getting now. It is possible they will start laying and keep laying throughout the winter this year, but next year they will molt without extra light. If you are getting very little daylight, it is possible they will wait until the days start getting longer to start laying, but maybe not. I really don't know. Each chicken is an individual. Three of my four pullets started laying early October, so they were getting less than 12 hours of light a day. One still has not started. Then I have a couple that will come of laying age early December, when the days are shortest. It will be interesting to see what happens.
One thing you might consider if they have not started laying and you are getting a fair amount of darkness. If you increase the amount of light, either in increments spread over a week or all of a sudden, probably does not matter which, they will probably start laying. That's how commercial egg laying operations do it. Keep them in short hours of light each day then go to the longer periods of light when they are old enough to lay decent sized eggs. But if your power goes off and they are suddenly in extra darkness, that could trigger a molt.
With my dual purpose mutt chickens, if they were not laying and I decided to give them extra light to getthem started, I'd probably wait until they are around 23 to 24 weeks old. In the summer, more than half are usually laying by then, so it is a pretty good age to start. But that is my flock, not necessarily yours.