Character mistake: When recruiting Burt to help repel the Graboid attack in the arctic, one of the team members says he's ideal for the job because of his experience hunting them on two continents, a reference to the first two films (Nevada and Mexico in North America) and Tremors 5 (Africa). However, this repeats the mistake in Tremors 5 in overlooking the Argentina incursion stopped by Burt at the beginning of Tremors 3, which gives him experience fighting Graboids/Shriekers/Ass-Blasters on three continents, not two. Burt, himself having overlooked Argentina in Tremors 5, does not correct her. And it's not as if the film is completely ignoring Tremors 3, since it shows the flashback of Burt being swallowed by a Graboid in that movie, which is how he got infected with the deadly parasite killing him here.
Factual error: At the beginning 'researchers' are working on the 60th parallel in the province of nunavut. Nunavut is not a province; it is a Canadian territory. They appear to be working in the winter. At the 60th parallel, the winter would be almost dark and the sun would never be that high in the sky. Given that sun, it would be summer. In the summer, you would not have that snow cover.