Where do you draw the line on IMC and weather challenges?

[JimC]

I don't have any single minimum for any of the above categories. It's always a combination of all available information that leads to a "gut check" go/no go decision.

For example, I might fly a trip that ends with an approach to minimums at a class B airport at mid-day in the summer whereas I wouldn't try the exact same approach in the exact same weather conditions after the end of a long day in the winter.

The weather conditions are only some of the info that goes into my pot. I just "cancelled" a roundtrip flight Friday that was a borderline VMC/IMC flight because of a combination of factors unrelated to the weather conditions.

Some of the factors I considered:
Time of day (late and getting later)
Length of day (it was a tough day for me)
Passengers (close friends I hadn't seen in a while - in other words, very likely to be distracting)
Airplane condition (1st flight after recent service)

Although I'd recently flown the same trip in worse weather without concern, I called to tell them I wasn't picking them up and asked them to hop in the car for a 4 hr drive.