Sorry but unless you are running cold weather specific tires on your bike the rubber compound is simply too stiff for the temps we are seeing. It decreases tire traction for things like braking.
Sorry, but they didn't have those in the '70s. And since I hated taking the bus and since my motorcycle insurance is sold on an annual basis with NO possibility of cancelling during the winter months, I drove to and from work all winter long in all kinds of weather...you drive accordingly.
The best place to learn how to ride a motorcycle is in the dirt and on the ice.