Helena Weather In December
The highest recorded temperature for Helena Montana for the past 70 years in December was 64 degrees Fahrenheit, most recently registered on December 26, 1980, while the regular high temperature is 32. The lowest documented temperature in December for Helena for the past 70 years was -38 on December 16, 1964, and the average low daily temperature is 11.
US National Weather Service historical Helena December Weather data records that on December 16, 1924, the high temperature did not exceed -24 degrees Fahrenheit, the lowest high measured in Helena in the past 70 years. Weather Service records additionally indicate that on December 12, 1921, the low for the day was not measured below 50 degrees, the highest low temperature recorded in Helena in the last 70 years.
Historical weather data accumulated by the National Weather Service shows that the average daily high temperature in Helena on December First is 36 degrees Fahrenheit and the average high on the last day of December is 28 degrees. The low measured temperature in Helena on December First averages 19 degrees and the low on the last day of the month averages 11 degrees.
Helena usually receives an average of 0.46 inches of precipitation during the month. The most precipitation measured in a single day, as indicated by December Helena Weather data, was 0.81 inches on December 6, 1901. Helena receives an average of 8.3 inches of snow in December.On December 12, 1917 Helena received 11 inches of rain, the greatest snowfall measured in a single day in December.