The advice I have seen on lightning safety is that if you don't have high-quality lightning protection (and associated grounding) installed on your feed line, it is advisable to, during a storm and preferably whenever you are not using your station, is to disconnect the antenna feed line from your equipment and “throw it out the window”, to separate it from the interior of the house.
This seems like a perfectly reasonable idea to me, except for the fact that “out the window” is likely to be wet, especially under the circumstances. How can I protect the free end of the coaxial cable (a PL-259 connector in this case) from water and other environmental damage? Permanent connections can be wrapped with amalgamating tape, but this is temporary and recurring.
It is possible I could arrange to hang the cable right under the eaves of the roof so as to avoid actual rain, but it would still be exposed to damp, windblown crud, bugs, and so on. I do have a rubber dust-cap the cable came with but it doesn't fully enclose the connector — would that be sufficient, assuming there isn't actually rain running down the cable?
Or alternatively, what other approaches should I consider for the safety of myself and my equipment, besides the above two? Note I am in a rented space and all of my current equipment is specifically installed “temporarily”. (Taking down the antenna itself is quite easy and I would probably do it in the event of a predicted storm, but even then the feed line is still a conductor outside of the building, and partly on the roof.)