December weather forecast and climate
Otter, MT

December, the first month of the winter, in Otter, is also a subzero cold month, with average temperature ranging between min 16.7°F (-8.5°C) and max 31.1°F (-0.5°C).

Temperature

The coldest month is December, with an average high-temperature of 31.1°F (-0.5°C) and an average low-temperature of 16.7°F (-8.5°C).

Humidity

The average relative humidity in December is 75%.

Rainfall

The month with the least rainfall in Otter is December when the rain falls for 6.8 days and typically collects 0.67" (17mm) of precipitation.

Snowfall

January through May, September through December are months with snowfall in Otter. In December, it is snowing for 11.2 days. Throughout December, 3.62" (92mm) of snow is accumulated. In Otter, during the entire year, snow falls for 65.3 days, and aggregates up to 28.82" (732mm) of snow.

Daylight

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

Sunshine

In Otter, Montana, the average sunshine is 6.1h.

UV index

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health vulnerability from the exposure to the Sun's UV rays for the ordinary person.
Note: In December, the average maximum UV index of 2 translate into the following recommendations:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the coldest month in Otter?

December is the coldest month in Otter, with an average high-temperature of 31.1°F (-0.5°C) and an average low-temperature of 16.7°F (-8.5°C).

What is the temperature in December in Otter?

In Otter, in December, the average high-temperature is 31.1°F (-0.5°C), and the average low-temperature is 16.7°F (-8.5°C).

What is the average humidity in December in Otter?

In Otter, the average relative humidity in December is 75%.

How much does it rain in Otter in December?

In December, the rain falls for 6.8 days. Throughout December, 0.67" (17mm) of precipitation is accumulated.

What is the driest month in Otter?

The month with the least rainfall is December when the rain falls for 6.8 days and typically collects 0.67" (17mm) of precipitation.

How much does it snow in Otter in December?

In Otter, Montana, in December, snow falls for 11.2 days, with typically accumulated 3.62" (92mm) of snow.

What is the month with the shortest days in Otter?

The month with the shortest days is December, with an average of 8.8h of daylight.

How many hours of daylight does Otter have in December?

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

How long on average sun shines in December in Otter?

In December, the average sunshine is 6.1h.

What are the months with the lowest UV index in Otter?

Months with the lowest UV index in Otter are January through March, November and December, with an average maximum UV index of 2.

How high is the UV index in December in Otter?

In December, the average daily maximum UV index in Otter, Montana, is 2. A UV Index of 2, and less, symbolizes a low health risk from the exposure to the Sun's UV radiation.
Average temperature in December - Otter, MT
  • Average high temperature in December: -0.5°C

The warmest month (with the highest average high temperature) is July (29.7°C).
The month with the lowest average high temperature is December (-0.5°C).

  • Average low temperature in December: -8.5°C

The month with the highest average low temperature is July (16.4°C).
The coldest months (with the lowest average low temperature) are January and February (-8.8°C).

Average pressure in December - Otter, MT
  • Average pressure in December: 1020.1mbar

The month with the highest atmospheric pressure is January (1020.3mbar).
The month with the lowest atmospheric pressure is June (1010.7mbar).

Average wind speed in December - Otter, MT
  • Average wind speed in December: 10.9km/h

The windiest month (with the highest average wind speed) is April (14.6km/h).
The calmest month (with the lowest average wind speed) is December (10.9km/h).

Average humidity in December - Otter, MT
  • Average humidity in December: 75%

Months with the highest relative humidity are January and February (79%).
The month with the lowest relative humidity is August (40%).

Average rainfall in December - Otter, MT
  • Average rainfall in December: 17mm

The wettest month (with the highest rainfall) is May (67mm).
The driest month (with the least rainfall) is December (17mm).

Average rainfall days in December - Otter, MT
  • Average rainfall days in December: 6.8 days

The month with the highest number of rainy days is May (18 days).
The month with the least rainy days is January (6.3 days).

Average snowfall in December - Otter, MT
  • Average snowfall in December: 92mm

The month with the highest snowfall is February (132mm).
Months with the least snowfall are June, July and August (0mm).

Average snowfall days in December - Otter, MT
  • Average snowfall days in December: 11.2 days

The month with the highest number of snowfall days is February (14.3 days).
Months with the least snowfall days are June, July and August (0 days).

Average daylight in December / Average sunshine in December - Otter, 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: 6.1h

Months with the most sunshine are July and August (Average sunshine: 11.9h).
The month with the least sunshine is February (Average sunshine: 5.7h).

Average sunshine days in December - Otter, MT
  • Average sunshine days in December: 16.5 days

The month with the most sunshine days is September (18.2 days).
The month with the least sunshine days is May (9.6 days).

Average UV index in December - Otter, MT
  • Average UV index in December: 2

The month with the highest UV index is July (UV index 7).
Months with the lowest UV index are January, February, March, November and December (UV index 2).

Average cloud cover in December - Otter, MT
  • Average cloud cover in December: 37

The month with the most cloud cover is February (Cloud cover 41).
Months with the least cloud cover are July and August (Cloud cover 14).

Average visibility in December - Otter, MT
  • Average visibility in December: 9km

Months with the highest visibility are May, June, July, August, September and October (10km).
Months with the lowest visibility are January, February, March, April, November and December (9km).