Sub-zero temperatures but this is a Celtic side who remain capable of turning up the heat.

The numbers continue to mount – 22 successive league wins now and 33 games without defeat this season – and despite a slow start there was never any real danger last night of Inverness freezing a run that shows no hint of stopping.

No slip-ups, no cold feet, just tunnel-vision as Inverness became home to the latest instalment of this season’s story.

Read more: Brendan Rodgers has no concerns about how Celtic's domestic domination reflects on Scottish football

That the same narrative runs throughout will be a source of satisfaction to Brendan Rodgers who has insisted that his side’s yield on the domestic front remains unremitting no matter how far out of sight his side get.

Scott Sinclair kicked it off before Moussa Dembele and Stuart Armstrong got in on the act last night.

By the time the whistle sounded Celtic had left their calling card – with Dembele once more turning in the kind of predatory, clinical display that has brought covetous eyes from all corners this season.

Yet, for all that it was as straightforward as it gets for a Celtic side who are intent on crushing all before them, it was a stodgy opening half before Celtic turned the screw.

It had taken until two minutes before the whistle sounded for the half-time interval before Celtic broke the deadlock but from there on in, it fell apart at the seams for Inverness.

Sinclair, who made history here back in September when he equalled a scoring record set by Jimmy McGrory of netting in five successive league games, was the man who put Rodgers’ side in front with a sumptuous strike.

Read more: Brendan Rodgers has no concerns about how Celtic's domestic domination reflects on Scottish football

It was a finely executed strike as the Englishman jinked and weaved his way goalward before curling an effort from the edge of the box high into the net to mark his 17th goal of what has been a convincing and consistent season from him.

While Dembele has stolen the headlines for the goals – all 31 of them now - Sinclair’s influence on Rodgers’ team and the way the Celtic manager wants his team to play is difficult to underestimate.

The Parkhead side had to be tenacious in their pursuit of Sinclair last summer but they have been rewarded with a player who has been pivotal to the transformation that Rodgers has overseen at the club.

It was most notably in the earlier months of the campaign as Celtic were blowing teams out of the water and there were glimpses of that ruthlessness on the second period last night as the Hoops turned the screw on the Highlanders.

Inverness were resolute for most of the opening half last night, although to be fair they struggled to get out of their own half.

The lack of space suffocated the game for large chunks of it, with Gary Mackay-Steven the only other player who came close to scoring when he collected a Stuart Armstrong corner on the edge of the box and tried his luck from distance.

While it had always remained a question of when rather than if Celtic would open the scoring, their task in the Highlands got significantly easier immediately after the restart.

Read more: Brendan Rodgers has no concerns about how Celtic's domestic domination reflects on Scottish football

Clearly feeling the cold the Highlands last night, Owain Fon Williams suffered the cringing type of error that will send a chill down him no matter if he watches it with his backside parked in front of a roaring fire.

Inverness, straight from kick-off, played the ball backwards and hat looked like a routine passback from Gary Warren bobbled off the outside of Fon Williams’ foot and, predator that he is, Dembele did not need a second invite to calmly dispatch the opportunistic goal.

The French striker looped the ball over the Inverness keeper’s header before slotting into the empty net. A quick glance along the line to check he remained onside was all it took before he eagerly lapped up the applause from the visiting support. Before the night was out he had the chance to milk it a little more by adding another to ever burgeoning tally.

Essentially, though, his second put Celtic in the position whereby they could have packed up and started the journey home so convincing was their hold by that stage. The stuffing went out of Inverness by the first, by the second they had given up the ghost.

A third almost came on the back of Dembele's striker when the 20-year-old linked with Sinclair,with the latter sending his effort arching over the bar but there was no mistaken the manner in which Celtic had simply eased up a gear.

Read more: Brendan Rodgers has no concerns about how Celtic's domestic domination reflects on Scottish football

Nir Bitton tried his luck with a long-range effort and that set the tone for a second period in which Celtic effectively toyed with their hosts.

Armstrong, though, added a third with a fine free-kick before Dembele then added a fourth with just under 20 minutes of regulation time to go.

Kieran Tierney deserved credit for his hand in the fourth as he slipped a finely weighted ball through for the Frenchman, oozing confidence with every touch, to collect and coolly beat the isolated Fon Williams.

His finish was symptomatic of a performance and a season in which Celtic have swept all before them.