Ah, Max: I have the fix for a runny nose!
Take a Kleenex (brand name.... a facial tissue), tear it in half, roll both halves into a tube and stuff them up your nostrils. Works like a charm! At some point, they get heavy and start to displace but that is no problem for one with 1) another Kleenex and 2) a modular helmet: raise the face plate of the helmet, face side of road and sneeze. Then roll up next Kleenex, ripped into halves, and re- insert. Repeat as needed. Works fantastic!
The far bigger problem is to keep all the body parts up to temp. for the whole ride. My wife and I use the following with great success: a Gerbing heated jacket liner under a winter, armored riding coat (not a jacket, you will need the longer waist length). Gerbing outer heated pants over jeans (I understand these are no longer available). Gerbing heated socks or heated boot insoles: the socks provide more heat but the insoles work well enough and are both more comfortable and much easier to put on. My wife wears the socks, I wear the insoles. (I also have the heated socks but find them problematic because the wires bunch up and require 're- stringing' throughout the weave of the sock). Heavy heated Gerbing gloves: do NOT get sucked into any type of 'light weight' or 'flexible' gloves. Winter, heated gloves need to be heavy and unfortunately cumbersome. I also have Gerbing heated glove liners, which are great under Aerostich triple digit glove covers but only down to about 30F. After that, go over to full Gerbing heated gloves (the 'Classic' models rather than the newer, thinner, 'Mary Jane Tinklepants' versions which basically suck).
To be truly comfortable, not tolerable, in cold weather, one must really prepare and make modifications as needed. Snowmobile equipment is ideal but it is so heavy and bulky that it hinders my riding a motorcycle. Heated gear is the way to go IMO, although I have zero experience with the 'new' Gerbing in the southeast US: all of my equipment came from the original Gerbing in WA, and was guaranteed for life. Unfortunately, that turned out to be the life of the original company, not the equipment.
Carefully outfit yourself and you can ride not only in tolerance but in true comfort down into the 20's F.
Brian
Thankfully it is only a 2.5 hour trip, so I can tolerate the extreme drops for short periods as long as the vest can keep my core temperature up. The dips to 25F were few, the 80% average was probably around 30F, and that would have been fine had I brought the acrylic socks and perhaps winter gloves (which I hate, because I feel out of control). If I had heated pants (don't bother recommending, apparently nothing will fit me) instead of thermal longs + jeans + heavy leather chaps, I could probably manage 25F continuously without much issue.
Surprisingly, the worst problem I have with riding in very cold temps is my nose sometimes starting to run 
