Is it ok if a little rain/drizzle gets into my wort in the last few minutes of the boil? It's drizzly today, but nothing that would keep me from being on the deck (or at least right inside, with a direct view of the kettle 10 feet away). This is in a city, so it's probably not the cleanest rain possible.
Note, at 15 minutes, the boil-off should be great enough that loosely covering the pot won't risk a boil-over (3-gallon batch, 8-gallon pot). But I just wondered what other brewers do.