The central Yukon, where Mayo is located, experiences the greatest range of annual temperatures of any place in North America. Mayo holds the Yukon high-temperature record, based on June 14, 1969, when the thermometer peaked at 36.1 degrees Celsius. The lowest the temperature has dropped in Mayo is minus 62.2 C, recorded on February 3, 1947. Mayo also holds the Canadian record for the greatest range of absolute temperatures, a difference of 98.3 degrees Celsius between the extreme high and extreme low.
Historical weather records over the past three decades show that the average daytime temperature in January in Mayo is minus 20.5 Celsius, dropping to minus 31 C at night. In July the daytime average was close to plus 23 C; at night the temperature dropped to about 9 C. Annual precipitation averages 313 millimetres. This includes 205 mm of rain and 147 centimetres of snow.
