Buy the 2015 Old Farmer's Almanac!
Reporting
Lettuce can withstand lightLettuce can withstand light frost (see below), however, it will not survive a freeze and you'll need to harvest.

2015 Garden Calendar2015 Weather Watcher's Calendar2015 Recipes Calendar2015 Engagement Calendar 2015 Everyday Calendar2015 Country CalendarNew Year Cross StitchLobster Rope Doormats