Ron stared at her a moment, torn between leaving her right there or getting her back inside. She certainly wasn't encouraging him to want to talk through the argument but he meant it when he said he didn't want her getting sick.
"Come on, Hermione," he said quietly, climbing the steps to the flat. "Let's go inside."
She still didn't look like she was moving so he went back in first, hoping that she'd follow and not just stand out in the cold to prove her point.