RE:weatherNFG has not yet provided details regarding their drilling schedule. If they do shut down for a bit, I doubt it would be because of "winter", they are near a main highway, and near civilization (Gander), so ingress and egress would not be a problem. Yes, there's lots of winter snowfall in their part of NFLD, (about 178 inches average), but winter is something they are used to there.
I would imagine that any pauses in the drilling action would be a time out to closely digest the data from the completed drilling, and then determine the best plan of attack for the next round of drilling.
It's not like many locations, where flying in and out are required, or ice roads, and you are hundreds of miles removed from civilization, good roads, power, etc.
Indeed, if you check out their website, take a look at the Technical Report, and they specifically state "Exploration, particularly geophysics and drilling canbe easily done through the winter months."