ricebowl

This year after a couple of rides in the 40's I'd suffer from a really bad constant runny nose for hours, into the next day even. Cold and rainy I'm fine. The couple of times it happened it was dry and windy. It was a really disgusting miserable experience. Any ideas? I felt like riding today but didn't because I was scared . This is the first season it's been a problem I've ridden in similar conditions and might have a bit of a runny nose during the ride but nothing like this...

elmore leonard

I ride in the high 30's, low 40's but at a leisurely pace, 5 layers of clothes, touque and never for more the 20 minutes to a 1/2 hour for exercise. Not for commuting. Here's my winter exercise bike. This bike really works the upper leg muscles.

TriDanny47

You could try riding with a scarf, neck warmer, or even a dust mask to create a bubble of warmer, humid air around your mouth and nose \ may work for you. Otherwise - decongestants, humidifiers, nasal sprays, maybe a neti pot if you can stand it (I can't - home water boarding torture for only $13.99 at Walgreen's - what a deal!)

Alligator

I think it is a certainty that when I ride in cold weather that my nose will run. It usually lasts for ~20-30 minutes once I'm back inside. The only times it has been an issue are if I'm meeting someone shortly after arriving. It's a little hard to continuously wipe your nose while shaking hands and make a good impression. However, when most people see me ride in during cold weather, they get the impression that I'm tough and can survive anything, which also goes a long way toward making that good impression.

BobbyG

Allergies? In rainy weather, pollen and other allergens are washed out of the air. In dry weather they can hang, float and travel. I found the anti-hystamine zyrtec and it's generic equivalent protect me from allergies without drowsiness...usually. Sometimes they do make me drowsy. Some people swear by "non-drowsy" Claritin, although that didn't work for me last time I tried it some years ago. But it may be worth trying an antihystamine on the next moderately cold, dry ride and see if that helps.
I bike commute year round for fitness with the added benefit that it has reduced my seasonal allergy problems. (Well, a good workout on the treadmill does the same thing for me.) A good workout or bike commute opens my sinuses, leading to some nose blowing and runniness, but mine abates after a few minutes. In fact, after returning to bike riding a few years ago I ditched my Nasonex nasal spray as I had so few allergy problems.
But even with my allergies, I never suffered from common hay-fever, or at least the itchy, watery eyes, runny nose symptoms. But a few times, when Colorado was visited by smoke from wildfires out west I found myself with itchy, watery eyes and a runny nose, which anti-hystamines dealt with very well.

RandomEncounter

The technical term is cold-induced rhinitis. I hear masks like this one work well.

Silk Lined Cold Weather Mask ? I Can Breathe! Masks