I know this is a question loaded with so many variables, but let's say you were cycling on a path/bike lane or road route that was quiet and wide enough. And there was no rain, snow nor ice.

What is the highest wind velocity that you know you can safely cycle for an hr. or less? And I mean a headwind or cross-wind?

I think around 40 km./hr. winds is my near my limit. I have cycled occasionally in 50 km. / hr. winds but it's not pleasant to me.And especially not when I'm cycling over a long elevated road bridge or along a ridge along a valley with no barrier around me.

*********I have determined that much as I dislike headwinds, I prefer the exhausting headwinds vs. cross winds at those wind speeds, where I have occasionally gotten shifted around.

Of course last year, I had the scariest experience of cycling in 70+ km./hr. winds. It truly was a windstorm that knocked out office tower glass windows, trees, etc.