Regardless of the time of year, one should always check the forecast. If there is clearly no chance of snow, I think it is OK to do this late October or early November. The way things have been going around here, there seems to be a chance of a dangerous snowstorm in September or June, so a check of the weather is always in order, but there are times when there clearly won't be a storm coming in, and I wouldn't worry about snow at those times.
I was in several wicked thunderstorms this summer in the Sierras. Good advice.