Frost free days

[loafer89]

What is the longest stretch of above freezing days that has been experienced at the summit?

[nevis_highwire]

Interesting question. I just did some quick research on wunderground.com. For 2006 Mount Washington was at or above 32 from May 26th thru September 9th.

Check it out: Mount Washington Data

[Mike D]

Hmm, on August 11 there was major icing on the summit. How could this be?

[nevis_highwire]

Hmm, on August 11 there was major icing on the summit. How could this be?

That's what I thought. I excluded everything that was 32 and above as frost free. But this includes 31.5-31.9 that got rounded to 32 so my method stinks.