"Kyle Boatright" writes:

What does this mean? A few conclusions:
1. VFR conditions prevail roughly 95% of the time, even here in the
rough-and-tumble Midwest.

Your stats showed only 5% or thereabouts IFR weather. Fair enough. So, 5% of
the time, you won't be able to get in or out due to IFR conditions. I'd
venture that there is another 5% where marginal VFR exists and you wouldn't
venture too far from home in those conditions. So, now we're at a 10% no-go
rate. [...]

Interesting calculations. One extra factor to consider. Chances are
that that 5% figure was calculated on a 24-hour basis, when instead it
would be appropriate to weight it for the daylight or nearly-daylight
hours, when more flying is likely to take place.

- FChE