Parameters for random weather / time at every mission start.

[Crash *]

I would like to have a query field where I as the mission creator could set the parameters for a conditional random generator.

For example:

Clock times: Only from 08:00 to 17:00
Seasons: All
Wind: Only calm to light
Wind direction: Any
Rain possible : yes

And each time the mission starts, the conditions would be randomly generated only within these parameters.