When does it start to get cold and snowy in Portsmouth, Nh?

Question

We are looking at flights home can someone tell me when does it start to get snowy and really cold?

Answer 1

I can't find data for Portsmouth, but just up the road in Rochester.  Since I don't know how you define "cold", I'll give you this link to where you can find the information you are looking:

http://www.weather.gov/climate/xmacis.ph...

Answer 2

The average 1st date for temperature low below 32°F is Sep 21 for Concord, NH, and Oct 6 for Portland, ME.

The average 1st date for snowfall ≥ 0.1 in. is Nov 20 for Concord and Nov 23 for Portland.  For Rochester, NH the average 1st date for snowfall ≥ 0.1 in. is Dec 3, and the average 1st date for temperature low below 32°F is Sep 29.