Has alaskas temperature gone over 20 degrees Fahrenheit?

Yes. Alaska's temperature has often gone over 20 degrees Fahrenheit. In fact, the average temperature in Fairbanks, Alaska, in July is 64 degrees Fahrenheit (18 degrees Celsius). The highest temperature ever recorded in Alaska was 100 degrees Fahrenheit (38 degrees Celsius) in Fort Yukon on June 27, 1915.