December weather forecastGallatin Gateway, MT
December
Weather in December
December sees Gallatin Gateway settling into the winter mode, the coldest month of the year. An increase in snowfall to 11.38in reflects a stark contrast to the clear, sunny days of July. The city reverberates with a festive cheer in anticipation of the new year. Looking forward, January continues on a similar note; freezing temperatures and snow-laden landscapes remain past the new year celebrations.Temperature
Gallatin Gateway's December weather, marked by an average high temperature of 24.8°F (-4°C) and an average low temperature of 10.4°F (-12°C), is the coldest in the year.Humidity
The average relative humidity in December is 88%.Rainfall
In December, the rain falls for 5.4 days. Throughout December, 1.42" (36mm) of precipitation is accumulated. Throughout the year, there are 131 rainfall days, and 23.15" (588mm) of precipitation is accumulated.Snowfall
Months with snowfall in Gallatin Gateway are January through June, September through December. In Gallatin Gateway, during December, snow falls for 18.5 days and regularly aggregates up to 11.38" (289mm) of snow. In Gallatin Gateway, Montana, during the entire year, snow falls for 122.8 days and aggregates up to 91.1" (2314mm) of snow.Daylight
With an average of 8h and 48min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:45 am and sunset at 4:42 pm. On the last day of December, in Gallatin Gateway, sunrise is at 8:05 am and sunset at 4:51 pm MST.
Sunshine
In December, the average sunshine in Gallatin Gateway is 4.7h.UV index
January through March, November and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for average individuals.Note: In December, the maximum UV index of 1 translates into these guidelines:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. It's recommended to limit sun exposure when its radiation is at its peak during midday. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Gallatin Gateway, MT
- Average high temperature in December: 24.8°F
The warmest month (with the highest average high temperature) is July (77°F).
The month with the lowest average high temperature is December (24.8°F).
- Average low temperature in December: 10.4°F
The months with the highest average low temperature are July and August (46.9°F).
The coldest month (with the lowest average low temperature) is December (10.4°F).
Average pressure in December
Gallatin Gateway, MT
- Average pressure in December: 30.19"Hg
The months with the highest atmospheric pressure are January and December (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in December
Gallatin Gateway, MT
- Average wind speed in December: 5.8mph
The windiest month (with the highest average wind speed) is January (6.2mph).
The calmest months (with the lowest average wind speed) are July and August (4.7mph).
Average humidity in December
Gallatin Gateway, MT
- Average humidity in December: 88%
The month with the highest relative humidity is February (90%).
The month with the lowest relative humidity is August (51%).
Average rainfall in December
Gallatin Gateway, MT
- Average rainfall in December: 1.42"
The wettest month (with the highest rainfall) is May (2.83").
The driest month (with the least rainfall) is August (1.3").
Average rainfall days in December
Gallatin Gateway, MT
- Average rainfall days in December: 5.4 days
The month with the highest number of rainy days is May (18.5 days).
The month with the least rainy days is January (4.4 days).
Average snowfall in December
Gallatin Gateway, MT
- Average snowfall in December: 11.38"
The month with the highest snowfall is February (15.51").
The months with the least snowfall are July and August (0").
Average snowfall days in December
Gallatin Gateway, MT
- Average snowfall days in December: 18.5 days
The month with the highest number of snowfall days is February (20.3 days).
The month with the least snowfall days is July (0 days).
Average daylight in December /
Average sunshine in December
Gallatin Gateway, MT
- Average daylight in December: 8h and 48min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in December: 4h and 42min
The month with the most sunshine is July (Average sunshine: 11h and 30min).
The months with the least sunshine are January and February (Average sunshine: 4h and 30min).
Average sunshine days in December
Gallatin Gateway, MT
- Average sunshine days in December: 12.5 days
The month with the most sunshine days is September (16.3 days).
The month with the least sunshine days is April (7 days).
Average UV index in December
Gallatin Gateway, MT
- Average UV index in December: 1
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 1).
Average cloud cover in December
Gallatin Gateway, MT
- Average cloud cover in December: 55
The month with the most cloud cover is February (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 17).
Average visibility in December
Gallatin Gateway, MT
- Average visibility in December: 4mi
The months with the highest visibility are June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, March and December (4mi).
