December weather forecast
Hammond, MT

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Weather in December

December, the first month of the winter in Hammond, is also a subzero cold month, with an average temperature fluctuating between 30.4°F (-0.9°C) and 18.1°F (-7.7°C).

Temperature

Hammond notes the coldest temperatures in December, with a high average of 30.4°F (-0.9°C) and a low of 18.1°F (-7.7°C).

Humidity

In December, the average relative humidity in Hammond is 78%.

Rainfall

In Hammond, in December, during 3.5 rainfall days, 0.59" (15mm) of precipitation is typically accumulated. In Hammond, during the entire year, the rain falls for 100 days and collects up to 12.83" (326mm) of precipitation.

Snowfall

Months with snowfall in Hammond are January through May, September through December. In December, it is snowing for 9.4 days. Throughout December, 2.95" (75mm) of snow is accumulated. Throughout the year, there are 52.1 snowfall days, and 23.54" (598mm) of snow is accumulated.

Daylight

With an average of 8h and 48min of daylight, December has the shortest days of the year.
On the first day of December in Hammond, sunrise is at 7:19 am and sunset at 4:18 pm. On the last day of the month, sunrise is at 7:38 am and sunset at 4:27 pm MST.

Sunshine

In Hammond, the average sunshine in December is 5.8h.

UV index

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for average individuals.
Note: The maximum daily UV index, 2 in December, converts into the following recommendations:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
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Frequently asked questions

What is the coldest time of year in Hammond?

December is the coldest month of the year in Hammond, Montana, registering average temperatures as high as 30.4°F (-0.9°C) and as low as 18.1°F (-7.7°C).

How cold is it in Hammond in December?

The high-temperature, in December, in Hammond, records 30.4°F (-0.9°C), while the low-temperature is 18.1°F (-7.7°C). In August, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, is calculated to be 84.2°F (29°C).

What is the average humidity in December in Hammond?

In Hammond, Montana, the average relative humidity in December is 78%.

How many days does it rain in December in Hammond?

In Hammond, in December, during 3.5 rainfall days, 0.59" (15mm) of precipitation is typically accumulated.

How much does it snow in Hammond in December?

In Hammond, in December, during 9.4 snowfall days, 2.95" (75mm) of snow is typically accumulated.

What is the month with the shortest days in Hammond?

The month with the shortest days in Hammond, Montana, is December, with an average of 8h and 48min of daylight.

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

In Hammond, Montana, the average day length in December is 8h and 49min.

What time are sunrise and sunset in December in Hammond?

On the first day of December in Hammond, Montana, sunrise is at 7:19 am and sunset at 4:18 pm. On the last day of the month, sunrise is at 7:38 am and sunset at 4:27 pm MST.

How long on average sun shines in December in Hammond?

The average sunshine duration in December in Hammond, Montana, is 5.8h.

When is the lowest UV index in Hammond?

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Hammond, Montana.

How high is the UV index in December in Hammond?

The average daily maximum UV index in December in Hammond is 2. A UV Index reading of 2, and below, represents a minimal hazard to health from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Hammond, MT

Average temperature in December - Hammond, MT
  • Average high temperature in December: 30.4°F

The warmest month (with the highest average high temperature) is July (85.8°F).
The month with the lowest average high temperature is December (30.4°F).

  • Average low temperature in December: 18.1°F

The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is February (17.1°F).

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Average pressure in December
Hammond, MT

Average pressure in December - Hammond, MT
  • Average pressure in December: 30.13"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).

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Average wind speed in December
Hammond, MT

Average wind speed in December - Hammond, MT
  • Average wind speed in December: 10.1mph

The windiest months (with the highest average wind speed) are January and October (10.4mph).
The calmest month (with the lowest average wind speed) is August (8.3mph).

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Average humidity in December
Hammond, MT

Average humidity in December - Hammond, MT
  • Average humidity in December: 78%

The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is August (47%).

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Average rainfall in December
Hammond, MT

Average rainfall in December - Hammond, MT
  • Average rainfall in December: 0.59"

The wettest month (with the highest rainfall) is May (2.05").
The driest month (with the least rainfall) is January (0.43").

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Average rainfall days in December
Hammond, MT

Average rainfall days in December - Hammond, MT
  • Average rainfall days in December: 3.5 days

The month with the highest number of rainy days is May (14.3 days).
The month with the least rainy days is January (2.8 days).

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Average snowfall in December
Hammond, MT

Average snowfall in December - Hammond, MT
  • Average snowfall in December: 2.95"

The month with the highest snowfall is April (4.88").
The months with the least snowfall are June, July and August (0").

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Average snowfall days in December
Hammond, MT

Average snowfall days in December - Hammond, MT
  • Average snowfall days in December: 9.4 days

The month with the highest number of snowfall days is February (10.3 days).
The months with the least snowfall days are June, July and August (0 days).

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Average daylight in December /
Average sunshine in December
Hammond, MT

Average daylight in December / Average sunshine in December - Hammond, MT
  • Average daylight in December: 8h and 5min

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: 5h and 5min

The month with the most sunshine is August (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 5h and 30min).

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Average sunshine days in December
Hammond, MT

Average sunshine days in December - Hammond, MT
  • Average sunshine days in December: 19.5 days

The month with the most sunshine days is November (21.3 days).
The month with the least sunshine days is April (12.6 days).

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Average UV index in December
Hammond, MT

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

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in December
Hammond, MT

Average cloud cover in December - Hammond, MT
  • Average cloud cover in December: 40

The month with the most cloud cover is February (Cloud cover 42).
The month with the least cloud cover is August (Cloud cover 15).

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Average visibility in December
Hammond, MT

Average visibility in December - Hammond, MT
  • Average visibility in December: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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Hammond, Montana, USA

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