Marijuana is an annual, it's life cycle is determined by the time of year.
Pot starts to flower in mid-late Aug.* and finishes in mid-late Oct.
Check an almanac or ask a nursery when the first frost of the year is in your area.
One frost will slow marijuana's development to a crawl, 2 consecutive frosts or 1 hard frost will stop it, a freeze will kill it.
I know a grower in your neck of the woods and she had to build an indoor growroom and she brings her plants inside at the end of Sept.
*except in equatorial climes/strains.
And in the southern hemisphere the seasons are reversed.
I think it would be too late to have the entire process outside. You could have it in a planter outside for most of the summer. And when the days start to shorten bring it inside under a HID light. That why it could be a very controlled process for flowering.
I'm in Nova Scotia, Canada, so we have similar climates. I planted my seeds around the 10th and I'm planning to have a reasonable harvest. I know I planted late, i didn't get my hands on the seeds I wanted until the day before.
I'm fairly sure my plants will have pleanty of time to mature and produce a good sized bud. I'm hoping for at least one male so I never have to worry about seeds again.
Anyhoo, I think you'll get some bud. Probably not a ton but enough to make the growing experience well worth the efforts.
Heres to hoping the winter holds off for afew weeks this year.