December weather forecast and climate
Plentywood, MT

December, the first month of the winter, in Plentywood, is still a freezing cold month, with average temperature ranging between max 21.9°F (-5.6°C) and min 10°F (-12.2°C).

Temperature

In December, the average high-temperature declines considerably, from a wintry 36.3°F (2.4°C) in November, to a freezing cold 21.9°F (-5.6°C). In December, the average low-temperature is 10°F (-12.2°C).

Humidity

The average relative humidity in Plentywood is 87%.

Rainfall

In Plentywood, during 3.6 rainfall days, 0.51" (13mm) of precipitation is typically accumulated. Throughout the year, in Plentywood, Montana, there are 93.3 rainfall days, and 12.01" (305mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall in Plentywood. In December, it is snowing for 13 days. Throughout December, 3.19" (81mm) of snow is accumulated. In Plentywood, during the entire year, snow falls for 66.5 days, and aggregates up to 19.02" (483mm) of snow.

Daylight

The month with the shortest days in Plentywood is December, with an average of 8.4h of daylight.

Sunshine

In Plentywood, Montana, the average sunshine is 4.2h.

UV index

The average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a minimal health hazard from unprotected exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 2 in December interpret into the following advice:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the temperature in December in Plentywood?

In Plentywood, Montana, in December, the average high-temperature is 21.9°F (-5.6°C), and the average low-temperature is 10°F (-12.2°C).

What is the average humidity in December in Plentywood?

In Plentywood, Montana, the average relative humidity in December is 87%.

How much does it rain in Plentywood in December?

In Plentywood, in December, it is raining for 3.6 days, with typically 0.51" (13mm) of accumulated precipitation.

How much does it snow in Plentywood in December?

In December, in Plentywood, Montana, it is snowing for 13 days. Throughout December, 3.19" (81mm) of snow is accumulated.

What is the month with the shortest days in Plentywood?

With an average of 8.4h of daylight, December has the shortest days of the year.

What is the average length of the day in December in Plentywood?

In Plentywood, Montana, the average length of the day in December is 8.4h.

How long on average sun shines in December in Plentywood?

The average sunshine in December in Plentywood, Montana, is 4.2h.

How high is the UV index in December in Plentywood?

The average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from the exposure to the Sun's UV radiation.
Average temperature in December - Plentywood, MT
  • Average high temperature in December: -5.6°C

The warmest month (with the highest average high temperature) is July (27.8°C).
The month with the lowest average high temperature is February (-6.8°C).

  • Average low temperature in December: -12.2°C

The month with the highest average low temperature is July (16.1°C).
The coldest month (with the lowest average low temperature) is February (-14.3°C).

Average pressure in December - Plentywood, MT
  • Average pressure in December: 1020.4mbar

The month with the highest atmospheric pressure is February (1021.6mbar).
The month with the lowest atmospheric pressure is June (1010.2mbar).

Average wind speed in December - Plentywood, MT
  • Average wind speed in December: 15.9km/h

The windiest month (with the highest average wind speed) is April (17.8km/h).
The calmest month (with the lowest average wind speed) is February (14.8km/h).

Average humidity in December - Plentywood, MT
  • Average humidity in December: 87%

Months with the highest relative humidity are January and February (88%).
The month with the lowest relative humidity is August (46%).

Average rainfall in December - Plentywood, MT
  • Average rainfall in December: 13mm

The wettest month (with the highest rainfall) is June (55mm).
The driest month (with the least rainfall) is February (12mm).

Average rainfall days in December - Plentywood, MT
  • Average rainfall days in December: 3.6 days

The month with the highest number of rainy days is June (13.9 days).
The month with the least rainy days is February (2.6 days).

Average snowfall in December - Plentywood, MT
  • Average snowfall in December: 81mm

The month with the highest snowfall is November (95mm).
Months with the least snowfall are June, July, August and September (0mm).

Average snowfall days in December - Plentywood, MT
  • Average snowfall days in December: 13 days

The month with the highest number of snowfall days is February (13.5 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December / Average sunshine in December - Plentywood, MT
  • Average daylight in December: 8.4h

The month with the longest days is June (Average daylight: 16.1h).
The month with the shortest days is December (Average daylight: 8.4h).

  • Average sunshine in December: 4.2h

The month with the most sunshine is July (Average sunshine: 11.7h).
The month with the least sunshine is February (Average sunshine: 3.9h).

Average sunshine days in December - Plentywood, MT
  • Average sunshine days in December: 17.2 days

The month with the most sunshine days is August (20.1 days).
Months with the least sunshine days are February and June (13.8 days).

Average UV index in December - Plentywood, 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 - Plentywood, MT
  • Average cloud cover in December: 56

The month with the most cloud cover is February (Cloud cover 60).
Months with the least cloud cover are July and August (Cloud cover 19).

Average visibility in December - Plentywood, MT
  • Average visibility in December: 8km

Months with the highest visibility are May, June, July, August, September and October (10km).
Months with the lowest visibility are January, February, March and December (8km).