Help it's getting cold

Not sure if this is where I should post this, but I was wondering if some one could help. I am a first time grower and I have an issue. It's getting cold where I live the plant has a bunch a buds and is probably 2-3 weeks from harvest. The only problem is it's kinda cold and rainy 55-65 degrees in the day with not too much sun and 45-55 at night. What should I do? Should I leave it ? should I uproot the plant and bring it inside and use a grow light? I any one knows I would appreciate any info. Thanks!!