It's not often temperatures drop to 40 degrees below zero, but for some, braving the negative temperatures is a time-honored tradition.

To be a member of the Forty Below Club, you have to do a little more than just walk outside in the bitter cold.

To join this elite club, people must stand in front of the University of Alaska Fairbanks thermometer in their best beach attire and snap a photo proving they braved the cold. Students manage to look warm in temperatures that can cause frostbite to set in in less than 30 minutes.

Minus 40 is the only temperature where Fahrenheit and Celsius are the exact same. 

Before this past weekend, temperatures hadn't dropped below minus 40 degrees in Fairbanks since February 2017. That winter Fairbanks dropped to minus 51 degrees Fahrenheit on Jan. 18, 2017. 

Even in Alaska, there is such thing as too cold. Fairbanks North Star Borough School District cancels outdoor recess at minus 20 degrees Fahrenheit.

However, those frigid temps don't seem to stop college students from going outside to stand in front of the thermometer. 

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