May is usually when we start to melt out but by the sounds of it, you are aiming for more June type weather. But then again, it all depends on your intended trails. August is usually when the summit has the warmest temperatures, least likely month to get snow (but we can and you still have to worry about Thunderstorms), month with the lowest 10 year average winds and the black flies are not as abundant. But even in the winter, people just hike this mountain. Climbing is more confined to Hunington's and a few other locations. But, I guess that comes down to what you consider "climbing" vs "hiking".
Last edited by Knapper; 03-16-2009 at 11:36 PM.
Staff Meteorologist/Night Observer, KMWN (Mt Washington Obs., NH)