December weather forecast and climate
Gallatin Gateway, MT

December, the first month of the winter, in Gallatin Gateway, is still a freezing cold month, with temperature in the range of an average high of 24.8°F (-4°C) and an average low of 10.4°F (-12°C).

Temperature

The coldest month is December, with an average high-temperature of 24.8°F (-4°C) and an average low-temperature of 10.4°F (-12°C).

Humidity

In Gallatin Gateway, the average relative humidity in December is 88%.

Rainfall

In December, in Gallatin Gateway, 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 are January through June, September through December. In Gallatin Gateway, Montana, in December, during 18.5 snowfall days, 11.38" (289mm) of snow is typically accumulated. In Gallatin Gateway, during the entire year, snow falls for 122.8 days, and aggregates up to 91.1" (2314mm) of snow.

Daylight

With an average of 8.8h of daylight, December has the shortest days of the year.

Sunshine

In December, the average sunshine is 4.7h.

UV index

Months with the lowest UV index in Gallatin Gateway, Montana, are January through March, November and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health hazard from the exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 1 interpret into the following advice:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the coldest month in Gallatin Gateway?

The coldest month in Gallatin Gateway is December, with an average high-temperature of 24.8°F (-4°C) and an average low-temperature of 10.4°F (-12°C).

What is the temperature in December in Gallatin Gateway?

The average high-temperature, in December, is 24.8°F (-4°C), while the average low-temperature is 10.4°F (-12°C).

What is the average humidity in December in Gallatin Gateway?

The average relative humidity in December in Gallatin Gateway is 88%.

How many days does it rain in December in Gallatin Gateway?

In Gallatin Gateway, in December, during 5.4 rainfall days, 1.42" (36mm) of precipitation is typically accumulated.

How much does it snow in Gallatin Gateway in December?

In December, in Gallatin Gateway, it is snowing for 18.5 days. Throughout December, 11.38" (289mm) of snow is accumulated.

What is the month with the shortest days in Gallatin Gateway?

December has the shortest days of the year in Gallatin Gateway, Montana, with an average of 8.8h of daylight.

What is the average length of the day in December in Gallatin Gateway?

In December, the average length of the day in Gallatin Gateway, Montana, is 8.8h.

How many hours of sunshine does Gallatin Gateway have in December?

In December, the average sunshine in Gallatin Gateway is 4.7h.

What is the month with the lowest UV index in Gallatin Gateway?

January through March, November and December, with an average maximum UV index of 1, are months with the lowest UV index in Gallatin Gateway, Montana.

What is the UV index intensity in December in Gallatin Gateway?

In December, the average daily maximum UV index in Gallatin Gateway, Montana, is 1. A UV Index value of 2, and less, symbolizes a minimal hazard to health from the exposure to the Sun's UV radiation.
Average temperature in December - Gallatin Gateway, MT
  • Average high temperature in December: -4°C

The warmest month (with the highest average high temperature) is July (25°C).
The month with the lowest average high temperature is December (-4°C).

  • Average low temperature in December: -12°C

Months with the highest average low temperature are July and August (8.3°C).
The coldest month (with the lowest average low temperature) is December (-12°C).

Average pressure in December - Gallatin Gateway, MT
  • Average pressure in December: 1022.2mbar

The month with the highest atmospheric pressure is January (1022.4mbar).
The month with the lowest atmospheric pressure is June (1012.6mbar).

Average wind speed in December - Gallatin Gateway, MT
  • Average wind speed in December: 9.4km/h

The windiest month (with the highest average wind speed) is January (9.9km/h).
The calmest month (with the lowest average wind speed) is August (7.5km/h).

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: 36mm

The wettest month (with the highest rainfall) is May (72mm).
The driest month (with the least rainfall) is August (33mm).

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: 289mm

The month with the highest snowfall is February (394mm).
Months with the least snowfall are July and August (0mm).

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: 8.8h

The month with the longest days is June (Average daylight: 15.6h).
The month with the shortest days is December (Average daylight: 8.8h).

  • Average sunshine in December: 4.7h

The month with the most sunshine is July (Average sunshine: 11.5h).
Months with the least sunshine are January and February (Average sunshine: 4.5).

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).
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: 7km

Months with the highest visibility are July and August (10km).
Months with the lowest visibility are January and February (6km).