AI6YR BenOkay, don't know who this person is, but that is significantly beyond my range of temperatures for riding a bicycle...
"...BBC presenter Louise Minchin has been taken to hospital after contracting frostbite during an Arctic adventure challenge.
The 57-year-old had been attempting to cycle 300 miles (483km) in three days in Canada's Northwest Territories to raise money for the Duke of Edinburgh's Award....
March average temperatures in the Northwestern Territories range from -13C to -23C (8.6 to -9.4F) - but the region was particularly cold on Friday, dropping to -30C in places.
Wind chills were as cold as -36C, which can cause frostbite to set in in as little as 10 minutes. Extremities such as fingers and toes are particularly vulnerable...."
Nazo