Our temps are kind of similar, all my 8 months black copper Marans took a winter break already. While other older breeds are either molting, some laying. The other 8 month olds RIR & Plymouth rocks are still laying but I have light supplement in the morning, on @4am and off @8am so I can feed and clean before I go to work. They get less 13 hours of daylight. I know I read mostly here that they need 14 hours for production but I opted for less since I know most countries close to equator have even 12 hours or less of daylight but their birds will lay eggs regardless.
After saying that, maybe you want to supplement your coop with light starting in September if you want eggs, to help them not take a break on production. In my case I only have the supplement light for logistic reason (feeding, cleaning) since I leave for work when it's dark and come home from work dark already.
From January - March I only have the lights for an hour in the morning. Hope this helps you for some insights.
