December weather forecast
Roberts, ID

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Weather in December

December, the first month of the winter in Roberts, is still a freezing cold month, with an average temperature fluctuating between 27.1°F (-2.7°C) and 14.9°F (-9.5°C).

Temperature

With average high temperatures of 27.1°F (-2.7°C) and lows of 14.9°F (-9.5°C), December is the coldest month.

Humidity

The average relative humidity in December is 87%.

Rainfall

In Roberts, in December, during 9.5 rainfall days, 0.94" (24mm) of precipitation is typically accumulated. Throughout the year, there are 112.3 rainfall days, and 10.94" (278mm) of precipitation is accumulated.

Snowfall

January through May, September through December are months with snowfall. In December, in Roberts, it is snowing for 17.1 days. Throughout December, 6.22" (158mm) of snow is accumulated. Throughout the year, there are 79 snowfall days, and 31.54" (801mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 9h and 0min of daylight.
On the first day of December, sunrise is at 7:43 am and sunset at 4:52 pm. On the last day of the month, sunrise is at 8:02 am and sunset at 5:01 pm MST.

Sunshine

In December, the average sunshine is 5.1h.

UV index

January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: In December, the maximum UV index of 1 suggests this advice:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.

Frequently asked questions

What time of the year is the coldest?

Roberts's coldest month, December, generally records average temperatures ranging from a high of 27.1°F (-2.7°C) to a low of 14.9°F (-9.5°C).

How cold is it in Roberts in December?

The high-temperature, in December, in Roberts, records 27.1°F (-2.7°C), while the low-temperature is 14.9°F (-9.5°C).

What is the average humidity in December?

The average relative humidity in December in Roberts is 87%.

How much does it rain in December?

In December, the rain falls for 9.5 days. Throughout December, 0.94" (24mm) of precipitation is accumulated.

How much does it snow in December?

In Roberts, in December, snow falls for 17.1 days, with typically accumulated 6.22" (158mm) of snow.

What is the month with the shortest days?

December has the shortest days of the year, with an average of 9h and 0min of daylight.

How many hours of daylight does Roberts have in December?

The average day length in December is 8h and 59min.

What time are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:43 am and sunset at 4:52 pm. On the last day of the month, sunrise is at 8:02 am and sunset at 5:01 pm MST.

How many hours of sunshine does Roberts have in December?

The average sunshine duration in December is 5.1h.

When is the lowest UV index?

January and December, with an average maximum UV index of 1, are months with the lowest UV index in Roberts.

How high is the UV index in December?

In Roberts, the average daily maximum UV index in December is 1. A UV Index reading of 2, and below, represents a low health risk from exposure to Sun's UV rays.
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
Roberts, ID

Average temperature in December - Roberts, ID
  • Average high temperature in December: 27.1°F

The warmest month (with the highest average high temperature) is July (85.1°F).
The month with the lowest average high temperature is December (27.1°F).

  • Average low temperature in December: 14.9°F

The month with the highest average low temperature is August (53.8°F).
The coldest month (with the lowest average low temperature) is January (13.8°F).

Average pressure in December
Roberts, ID

Average pressure in December - Roberts, ID
  • Average pressure in December: 30.26"Hg

The month with the highest atmospheric pressure is January (30.29"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

Average wind speed in December
Roberts, ID

Average wind speed in December - Roberts, ID
  • Average wind speed in December: 5.1mph

The windiest month (with the highest average wind speed) is April (8mph).
The calmest month (with the lowest average wind speed) is January (4.9mph).

Average humidity in December
Roberts, ID

Average humidity in December - Roberts, ID
  • Average humidity in December: 87%

The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is August (37%).

Average rainfall in December
Roberts, ID

Average rainfall in December - Roberts, ID
  • Average rainfall in December: 0.94"

The wettest month (with the highest rainfall) is May (1.26").
The driest month (with the least rainfall) is July (0.31").

Average rainfall days in December
Roberts, ID

Average rainfall days in December - Roberts, ID
  • Average rainfall days in December: 9.5 days

The month with the highest number of rainy days is April (14.2 days).
The month with the least rainy days is July (5.8 days).

Average snowfall in December
Roberts, ID

Average snowfall in December - Roberts, ID
  • Average snowfall in December: 6.22"

The month with the highest snowfall is January (8.31").
The months with the least snowfall are June, July and August (0").

Average snowfall days in December
Roberts, ID

Average snowfall days in December - Roberts, ID
  • Average snowfall days in December: 17.1 days

The month with the highest number of snowfall days is January (17.3 days).
The months with the least snowfall days are July and August (0 days).

Average daylight in December /
Average sunshine in December
Roberts, ID

Average daylight in December / Average sunshine in December - Roberts, ID
  • Average daylight in December: 9h and 0min

The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).

  • Average sunshine in December: 5h and 1min

The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).

Average sunshine days in December
Roberts, ID

Average sunshine days in December - Roberts, ID
  • Average sunshine days in December: 11.8 days

The month with the most sunshine days is July (22.3 days).
The month with the least sunshine days is February (9.9 days).

Average UV index in December
Roberts, ID

Average UV index in December - Roberts, ID
  • Average UV index in December: 1

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).

Average cloud cover in December
Roberts, ID

Average cloud cover in December - Roberts, ID
  • Average cloud cover in December: 50

The month with the most cloud cover is February (Cloud cover 52).
The months with the least cloud cover are July and August (Cloud cover 11).

Average visibility in December
Roberts, ID

Average visibility in December - Roberts, ID
  • Average visibility in December: 4mi

The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (4mi).

Roberts, Idaho, USA

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