December weather forecast
Hartman, CO

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Weather in December

The first month of the winter, December, is also a frosty month in Hartman, Colorado, with temperature in the range of an average high of 43.7°F (6.5°C) and an average low of 26.4°F (-3.1°C).

Temperature

December is the month that records the lowest temperatures, with averages ranging from a high of 43.7°F (6.5°C) to a low of 26.4°F (-3.1°C).

Humidity

In December, the average relative humidity in Hartman, Colorado, is 57%.

Rainfall

In Hartman, in December, during 3.7 rainfall days, 0.35" (9mm) of precipitation is typically accumulated. Throughout the year, there are 79.5 rainfall days, and 8.9" (226mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall in Hartman. In Hartman, in December, snow falls for 3.5 days, with typically accumulated 1.02" (26mm) of snow. Throughout the year, in Hartman, Colorado, there are 19.6 snowfall days, and 7.09" (180mm) of snow is accumulated.

Daylight

With an average of 9h and 36min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 6:47 am and sunset at 4:29 pm. On the last day of December, in Hartman, Colorado, sunrise is at 7:05 am and sunset at 4:39 pm MST.

Sunshine

The average sunshine in December in Hartman is 6.8h.

UV index

The months with the lowest UV index are January, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for the average person.
Note: A maximum high daily UV index of 2 during December translates into the following directions:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
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Frequently asked questions

What part of the year is the coldest in Hartman?

In Hartman, December is the coldest month, with temperatures averaging a high of 43.7°F (6.5°C) and a low of 26.4°F (-3.1°C).

How cold does it get in Hartman in December?

The average high-temperature and low-temperature during December are 43.7°F (6.5°C) and 26.4°F (-3.1°C) respectively. The average heat index (a.k.a. 'felt air temperature', 'real feel'), which represents the influence of relative humidity on air temperature, in September is appraised at 82.4°F (28°C).

What is the average humidity in December in Hartman?

In December, the average relative humidity in Hartman, Colorado, is 57%.

How many days does it rain in December in Hartman?

In December, in Hartman, the rain falls for 3.7 days. Throughout December, 0.35" (9mm) of precipitation is accumulated.

How many days does it snow in December in Hartman?

In Hartman, during December, snow falls for 3.5 days and regularly aggregates up to 1.02" (26mm) of snow.

What is the month with the shortest days in Hartman?

With an average of 9h and 36min of daylight, December has the shortest days of the year.

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

The average day length in December in Hartman, Colorado, is 9h and 34min.

When is the sunrise / sunset in December in Hartman?

On the first day of December, sunrise is at 6:47 am and sunset at 4:29 pm. On the last day of the month, sunrise is at 7:05 am and sunset at 4:39 pm MST.

How many hours of sunshine does Hartman have in December?

In December, the average sunshine duration in Hartman, Colorado, is 6.8h.

When is the lowest UV index in Hartman?

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

What is the UV index intensity in December in Hartman?

In December, the average daily maximum UV index is 2. A UV Index estimate of 2, and below, represents a low health threat 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
Hartman, CO

Average temperature in December - Hartman, CO
  • Average high temperature in December: 43.7°F

The warmest month (with the highest average high temperature) is July (92.7°F).
The month with the lowest average high temperature is December (43.7°F).

  • Average low temperature in December: 26.4°F

The month with the highest average low temperature is July (71.1°F).
The coldest month (with the lowest average low temperature) is December (26.4°F).

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Average pressure in December
Hartman, CO

Average pressure in December - Hartman, CO
  • Average pressure in December: 30.08"Hg

The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.8"Hg).

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Average wind speed in December
Hartman, CO

Average wind speed in December - Hartman, CO
  • Average wind speed in December: 9.1mph

The windiest month (with the highest average wind speed) is April (12.2mph).
The calmest month (with the lowest average wind speed) is January (8.9mph).

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Average humidity in December
Hartman, CO

Average humidity in December - Hartman, CO
  • Average humidity in December: 57%

The month with the highest relative humidity is January (59%).
The month with the lowest relative humidity is June (40%).

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Average rainfall in December
Hartman, CO

Average rainfall in December - Hartman, CO
  • Average rainfall in December: 0.35"

The wettest month (with the highest rainfall) is July (1.54").
The driest month (with the least rainfall) is November (0.28").

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Average rainfall days in December
Hartman, CO

Average rainfall days in December - Hartman, CO
  • Average rainfall days in December: 3.7 days

The month with the highest number of rainy days is July (11.8 days).
The month with the least rainy days is November (2.5 days).

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Average snowfall in December
Hartman, CO

Average snowfall in December - Hartman, CO
  • Average snowfall in December: 1.02"

The month with the highest snowfall is February (1.93").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Hartman, CO

Average snowfall days in December - Hartman, CO
  • Average snowfall days in December: 3.5 days

The month with the highest number of snowfall days is February (5.6 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in December /
Average sunshine in December
Hartman, CO

Average daylight in December / Average sunshine in December - Hartman, CO
  • Average daylight in December: 9h and 4min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in December: 6h and 5min

The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 36min).

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Average sunshine days in December
Hartman, CO

Average sunshine days in December - Hartman, CO
  • Average sunshine days in December: 24.9 days

The month with the most sunshine days is November (25.2 days).
The month with the least sunshine days is July (17.3 days).

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Average UV index in December
Hartman, CO

Average UV index in December - Hartman, CO
  • Average UV index in December: 2

The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, November and December (UV index 2).

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Average cloud cover in December
Hartman, CO

Average cloud cover in December - Hartman, CO
  • Average cloud cover in December: 23

The months with the most cloud cover are February and April (Cloud cover 25).
The months with the least cloud cover are June and September (Cloud cover 14).

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Average visibility in December
Hartman, CO

Average visibility in December - Hartman, CO
  • 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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Hartman, Colorado, USA

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