Probably about 15º C (59º). I've never lived in an area with a cold climate.
I really admire those of you who commute by bike in frigid conditions.
Walked a quarter mile in 2 ft of snow, ambient temps were -30 F. Later heard the wind chill was -70 F. This was in Maine.
Biked for almost 2 hours in 32 F, but I don't know what the wind chill temp was. It was unusually cold for the central coast of CA.
23°F, but I only started back in mid-March...
I remember when I was about 22 and working on a psych unit in southern Michigan. One Saturday the afternoon temp was like 25 below. I loved cold weather. I was at work but I wanted to go outside so badly. I conned a couple gullible patients into going out with me by saying, one day you'll tell your grandkids that you took a walk when it was 25 below. I didn't really think they would ever tell their grand kids... I just wanted an excuse for my boss to let me go outside. It worked and we took a great walk at 25 below zero.
The funny thing? Not long ago, I told this story to my grandson!
Honestly, my cold-weather cutoff for anything more than half an hour is about -20 C (-4 F). I once biked to an xc ski lesson in that temperature, did hill repeats and various other exercises for 2.5 hours, then biked home. It took my feet a few hours to recover, despite my Sorrels and wool socks. Shorter distances are okay though.
Since walking is my backup to biking, I'll walk in just about any temperature, though it doesn't often get below -30 (without wind chill) here. I think walking is less chilling because it's a more consistent motion rather than sweating up hills and freezing on the way down.
On a related topic, temperatures dipped below freezing last night, and I saw frost on the ground on my way to work this morning. Winter is coming...
teens, last winter.
However, the coldest I've been commuting was actually on a little warmer day. Temps were hovering right at or just above freezing. The surface temperature was below 32, with a light rain - resulting in freezing rain.
I had to keep working the brakes and gears to keep everything from freezing up. I had ice on my bike and helmet, I was in raingear that got wet only. The streets were water but the spray would freeze.
I took these pix when I got home:
Attachment 342985Attachment 342986
I guess I'm a wuss... 30*F is my cut off point. My son has ridden his bike all winters for the last 3 years even at -5*F.
When i lived in chicago, under 20/f was my cutoff
then it was the bus.
but Since i moved it gets down to about 45 in feb.
freezing point so_-0C, when the wet streets and run off from springs turn to Ice,
I break out the Studded tire bike.. works better than trying to walk on the stuff..
FWIW, local weather pattern .. on the western side, by the Ocean ..
The Columbia River Does not Freeze, the Icy days are a result of the cold air mass behind the Cascade range
being funneled up through the Gorge, off shore, and then it's cold on the Coast at the estuary and on the beach.
Thunder and Lightning , now, but the heavy Rain is still Liquid..
Naval training center, San Diego , Aka Boot Camp, in December is not warm ,
if you are in your cotton , issue , dungarees..
or at least so, in 1966.. my sample.