It all depends on your perspective of "what's too cold" -- I'm from the midwest so Flagstaff has mild winters in my book. The summers are very mild compared with Phoenix and Tucson -- I avoid going more than 20 miles south of Flagstaff from April 1 through October 31 because the heat is just too much.
Flagstaff has plenty to do -- we have one of the best regional symphonies in the country -- folks from Sedona have season tickets and real music lovers from as far away as Tucson are regulars. We have great restaurants, an historic downtown with music and special events to attract the local crowd each weekend, including the monthly First Friday Artwalk. We're a university town so we have university as well as community theatre. The San Francisco Peaks and Mt. Elden offer some of best hiking trails in the world, and the City of Flagstaff Urban Trail allows you to enjoy the scenery on your bike or on foot if those mountain trails are too challenging. - Fri Nov 27 2009, 06:41