Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
Jefferson City experiences its lowest average temperatures in December, reaching a peak of 27°F (-2.8°C) and a minimum of 12.6°F (-10.8°C).Humidity
In December, the average relative humidity is 84%.Rainfall
The month with the least rainfall is December, when the rain falls for 8.2 days and typically collects 0.79" (20mm) of precipitation.Snowfall
January through June, September through December are months with snowfall. In December, in Jefferson City, Montana, it is snowing for 16.8 days. Throughout December, 6.22" (158mm) of snow is accumulated. In Jefferson City, during the entire year, snow falls for 105.8 days and aggregates up to 55.12" (1400mm) of snow.Daylight
With an average of 8h and 42min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:51 am and sunset at 4:43 pm. On the last day of December, sunrise is at 8:11 am and sunset at 4:51 pm MST.
Sunshine
January and December, with an average of 5.6h of sunshine, are months with the least sunshine.UV index
The average daily maximum UV index in December in Jefferson City is 2. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for the ordinary person.Note: A maximum UV index of 2 in December translates into the following recommendations:
Extended exposure to the sun should always be avoided by children, infants, and those with sensitive skin. Avoiding the Sun during its peak radiation time around midday is a healthy practice. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Frequently asked questions
What month is the coldest in Jefferson City?
How cold is December in Jefferson City?
What is the average humidity in December in Jefferson City?
What is the driest month in Jefferson City?
How many days does it rain in December in Jefferson City?
How much does it snow in Jefferson City in December?
What is the month with the shortest days in Jefferson City?
What is the average length of the day in December in Jefferson City?
When is the sunrise / sunset in December in Jefferson City?
What is the month with the least sunshine in Jefferson City?
How many hours of sunshine does Jefferson City have in December?
What is the UV index reading in December in Jefferson City?
Average temperature in December
Jefferson City, MT
- Average high temperature in December: 27°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is December (27°F).
- Average low temperature in December: 12.6°F
The month with the highest average low temperature is August (48.6°F).
The coldest month (with the lowest average low temperature) is December (12.6°F).
Average pressure in December
Jefferson City, MT
- Average pressure in December: 30.18"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Jefferson City, MT
- Average wind speed in December: 6.4mph
The windiest months (with the highest average wind speed) are January and November (6.5mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in December
Jefferson City, MT
- Average humidity in December: 84%
The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is August (46%).
Average rainfall in December
Jefferson City, MT
- Average rainfall in December: 0.79"
The wettest month (with the highest rainfall) is June (2.68").
The driest month (with the least rainfall) is December (0.79").
Average rainfall days in December
Jefferson City, MT
- Average rainfall days in December: 8.2 days
The month with the highest number of rainy days is May (18.2 days).
The month with the least rainy days is November (7.5 days).
Average snowfall in December
Jefferson City, MT
- Average snowfall in December: 6.22"
The month with the highest snowfall is February (9.72").
The months with the least snowfall are July and August (0").
Average snowfall days in December
Jefferson City, MT
- Average snowfall days in December: 16.8 days
The month with the highest number of snowfall days is February (18 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in December /
Average sunshine in December
Jefferson City, MT
- Average daylight in December: 8h and 4min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in December: 5h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 42min).
The months with the least sunshine are January and December (Average sunshine: 5h and 36min).
Average sunshine days in December
Jefferson City, MT
- Average sunshine days in December: 13.7 days
The month with the most sunshine days is September (17.9 days).
The month with the least sunshine days is February (8.5 days).
Average UV index in December
Jefferson City, MT
- Average UV index in December: 2
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in December
Jefferson City, MT
- Average cloud cover in December: 44
The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 15).
Average visibility in December
Jefferson City, MT
- Average visibility in December: 5mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).
Jefferson City, Montana, USA
Weather forecast for your location
2. Allow the app to use your location
