PaulH

Studded bike tires are illegal in Ontario? That's crazy.

Paul

xtrajack

I ride in what ever the temp happens to be, my coldest so far -20 F. When I got to work, I was sweating. There was also 3" of snow on the road.
I generally start out a little chilly, but, after the first mile or so, I have plenty of heat.
When riding in the cold proper clothing is key. layers, wool, covering exposed skin, etc. The hardest part is fingers and feet, trying to keep them warm and happy.

Dan Burkhart 

Well, that's one law I flout with impunity. Actually, although it's true studded tires are outlawed here for motor vehicles, I can't imagine it being enforced for bicycles.

Northwestrider

I selected 21 to 30 F as that is what I have prepared for here in the Seattle area, it typically doesn't get much colder than that here. The more complete answer from me would be, as long as there is not a problem with traction, I'll ride

gforeman 

I used to ride my motorcycle in Sub Freezing. I was young and dumb then. I cannot stand riding in the cold...any cold! Maybe it's because after losing 125 lbs, I don't hold heat. What I hate is, I ride hard and sweat, then the wind makes me freeze.

So 60+ or I'm inside riding the spinner. If it's not fun, it's not worth doing.

I like riding in the heat. If it hits 100+ I am out on the bike and I love it. My wife thinks I'm crazy, but I have really always been that way. Of course when I am done, I want to get a shower and hit the A/C.

hagen2456

Around -4 F. If that's the equivalent of -20 C. Depends on humidity and wind, of course. At -4, it must be close to no wind, and it must be rather dry, or the cold will be unendurable. Some of the worst weather is actually what we have on a typical Danish winter morning: Wind around 10-15 m/s, temp around 30 F, and sleet. That's plain depressing.

Machka 

The coldest temperature I've ridden in is -40C/F ... commuting to work (it warmed up a bit on the way home).

Ali_Pine

Never less than 85 deg. f., sunny, no wind, cool beach to ride to.....

Unless you'er talking skiing.

It's the clothing not the temp.

rideon7

Have commuted to work in the single digits (8 or 9 Fahrenheit) but it's sort of a hassle to get enough gear on to ride in those temps, and I don't want to invest in cold weather riding shoes or boots, so the teens is about as cold as I go now.

Having said that, it's 27 degrees this morning and I probably won't ride because of the sudden drop from mornings in the upper 30s. This year I'm feeling a fair bit older than I have in previous years. Not sure why. Well, actually, work has been pretty intense this last year. Funny how that can be a distraction in other parts of life, including riding.

khosch

Try motorcycle goggles. I use a pair when it gets chilly, because otherwise I can water a garden with the stream from my eyes ;-)

baj32161

I will ride in temps above freezing. I live in Canada and can deal with a bit of cold, but icy roads are another story.

Cheers,

Brian J.

xizangstan

Denver, I'm a native of the city of Denver and lived lots of years out to the SE of town. I've ridden my titanium Xizang mountain bike across Cherry Creek and Chatfield lakes, as well as the Platte River. That's the same bike that's been along the southern coast in salty air. As a native, I should have been used to the cold, but the cold on my face and ears is just too brutal. Watery eyes, runny nose, ear aches, etc. aren't my cup of tea.

Though I can ride when it's 20 F out, across large bodies of water frozen with 3-ft. thick caps of ice, I prefer the warm breezes, sand, palm trees and even those flying rats - the seagulls - who dive bomb me.

phillybill

32.... no wind or rain.... must have sun

goldfinch

Good idea. How do you deal with glasses? Prescription goggles?

Gravity Aided

I don't mind 40 degrees if the sun is out and the wind is not blowing me all over. But that requires a true freak of weather here in the midwest. Normally, winter is cloudy and windy. That had few positives, until my area became wind-farm central.

gforeman 

I kind of broke my own rule today. 58 and Sunny, so I did 21 miles. Legs were fine, upper body was freezing! Had a T-Shirt, Long sleeve short, and another bike shirt on, and was still cold.

DX-MAN

Three winters ago, I rode to work (9 miles one way) in -5F with -35/-50 windchill; I was out there for an hour, felt some pain, but still had a smile on my face; since my job is now only 2 miles away, I don't see any more adventures like that one on the horizon. But I'd do it again!

tsl

I chose -9 to 0°F, only because that's the coldest I've ridden, and it's not really likely to get much colder than that around here. The lake (Lake Ontario) moderates our temperature. If it freezes solid across, then all bets are off.

DnvrFox

You need a wind breaker - truly - even the lightest makes a huge difference.

Dan Burkhart 

That is such a rare occurrence that it has actually happened only twice in recorded history, and neither of those winters were within either of our lifetimes.
The real kicker is that you guys usually get more severe winters on the south side of the lake than we do up here.

Mobile 155

+1 Any colder than that and I move.

Dan Burkhart 

If I wasn't such a wuss, I'd carry my bike with me on the road all winter, but I have no desire to bring a wet slushy bike inside my cab.
But, if I did bring it with me, I could probably get bragging rights for riding down to -35 or so, as I routinely venture into such temps on my travels.
I have seen folks cycle commuting in -40 in Places like Saskatoon and Yellowknife. Brrr!

bobbycorno

I don't honestly know my low-temp limit for cycling - haven't gotten there yet. For the record, it was 19-20 f when I left for work (on the bike) yesterday and today. And IIRC, I've ridden in single digits. Must by my Norwegian genes: "There is no bad weather, only inadequate clothing."

SP
Bend, OR

gcottay

Willingly? By choice not necessity? Something more than a couple miles?

I want a minimum of 60 and sun.

sknhgy 

I voted 10+. In the single digits my fingers freeze too fast, I need heavy boots, and exposed facial skin freezes. Kinda takes the fun out of it.
However, I did invest in ski goggles recently. I hope they're worth it.