Broken for me as well.
Looks like certain assumptions about max length of weather numbers causes unnecessary additional padding resulting in misaligned borders.
Looks like certain assumptions about max length of weather numbers causes unnecessary additional padding resulting in misaligned borders.
(Or maybe not "the" font, but fonts in general - perhaps it's trying to use one font, which doesn't have these arrows, so it falls back to a different one?)
Update: Looks like they fixed it now. I just re-visited the site after posting this comment and see that there are new monospace arrows rendering in a properly aligned manner.