I suspect you've answered your own question. I think on a windy day they will use whatever cover there is, so you'd have to measure the windspeed at the hive entrance and behind every hedge and bush.fly at 30 km/hr
Foraging down-wind would mean a lesser limit for wind speed, of course! Or they may have to come back at low level, below the free-air flow or behind a hedge for example!
With that in mind, I am wondering what wind speed actually keeps them at home, given there was suitable sheltered forage available.
Why would you want to read a newspaper thro' honey ??You would be surprised at what wind speed they can fly in. Angus Nicol on Shetland can tell a tale or two about that.... LOL
He has seen his dodging down the back of the dykes (stone walls) to Lerwick and working the fuchsia here. Beautiful near clear honey, clear enough to read a newspaper through in fact.