I believe when falcon (or another rocket) will be launched as many times as Soyuz (for example), weather requirements will be more relaxed. https://twitter.com/elonmusk/status/1266695491879911424

Should be really big clouds to surpass something which was doable for Buran (wind 9-12 m/s http://buran.ru/htm/flight.htm ) .

The launch window limitations were due to the ISS orbits.

For other destinations or uses, the launch windows might be more flexible or not be an issue at all.

Plus 4 for security, immigration etc...