The time was almost a minute slower than Dutch victor Annemiek van Vleuten, who headed off two other accomplished riders - second-placed compatriot Anna van Der Breggen and Australian Katrin Garfoot.
Only when compatriot van Vleuten finished with 28-50.35 did someone better van der Breggen's time - but even she did not beat van der Breggen's intermediate times, instead going faster in the final 5km to seal the rainbow jersey despite the wet road conditions.
Only five riders got within a minute of van Vleuten's time as she and van der Breggen secured the first gold and silver from the same country in the time trial since 1996.
"It would have been nice to step up at least one place but I'm still happy with my ride", Garfoot told reporters.
The result continues a world championships where Villumsen has looked strong without the reward of a medal, following a team time trial where she was the strongest rider on a team plauged by bad luck, claiming a fifth place finish. It's always the Dutchies.
Garfoot, 35, has set her sights on the Tokyo Olympics in 2020 but is also keen to start a family.
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The game will be played at the newly-opened Mercedes-Benz Stadium in Atlanta. "We are thrilled to once again be part of the Chick-fil-A Kickoff".
"This season I've been surprising myself what I can do", van Vleuten said at the finish.
"Maybe I have to take a break for one year to squeeze out a baby ..." "To be world champion in the time trial, I never thought I'd be able to do this". Van Vleuten was alone in the lead at the time with about seven miles to go of the 87-mile course.
Van Vleuten's first celebratory act Tuesday was to climb past two barriers and into her mother's arms.
"I can't believe it".
Little more than a year after a horrific accident in the Rio Olympics road race left her with three spinal fractures, the 34-year-old powered round the hilly 21.1km course in Bergen, Norway to win by a comfortable margin.
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