His most recent win on the PGA Tour, the Valero Texas Open in April, came when temperatures were scarcely into double figures and it became, in his words, ‘a game of attrition’.
And when he won The Open, it was a weekend of downpours on Merseyside. Harman was safely inside the clubhouse with the lead by the time the heavens opened in County Antrim on Friday afternoon but he is a man equipped with the game to cope should the elements turn against him in the coming days.
“I’ll approach the weekend the same way,” Harman added – right down to seeking out a ‘big steak’ between rounds.
“The only thing I’m really worried about is the first tee ball tomorrow, and then I’ll try to hit the next one up there close to the flag. If not, go to the second hole. It’s a very boring approach that I take.
“I’m not trying to be heroic or do anything crazy. I know that I’ve got the game to do it, and it’s just a matter of executing and staying in my own head.”
Things can change in an instant at The Open and Harman is not expecting the parallels with Royal Liverpool to continue indefinitely.
He led by five shots at this stage two years ago and maintained a comfortable advantage almost throughout but the leaderboard is more condensed this time around.
“I would love to have a similar weekend and just play great the whole way through,” he said.
“There’s going to be challenges. This is a hard golf course. The pins have been in really, really tough spots, and you’ve really got to think your way around it.
“Inevitably you’re going to mis-hit some shots and end up in spots you don’t want to be in, and the way you handle that will determine the outcome.
“But any time you can get in contention, have a chance to win, that’s what we’ve all worked for our entire lives. You don’t get that many opportunities to do that.”
Another Friday 65. Another clubhouse lead. Another Claret Jug?