December weather forecast
Guyaz, ID

englishespañol中文
Share

Weather in December

The first month of the winter, December, is also a subzero cold month in Guyaz, Idaho, with an average temperature varying between 14.4°F (-9.8°C) and 27°F (-2.8°C).

Temperature

December, noted for its average high-temperature of 27°F (-2.8°C) and an average low-temperature of 14.4°F (-9.8°C), is considered the coldest month.

Humidity

In Guyaz, the average relative humidity in December is 88%.

Rainfall

In Guyaz, in December, during 5.3 rainfall days, 0.98" (25mm) of precipitation is typically accumulated. Throughout the year, in Guyaz, there are 101.4 rainfall days, and 12.72" (323mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, September through December. In December, in Guyaz, Idaho, it is snowing for 16.9 days. Throughout December, 7.28" (185mm) of snow is accumulated. Throughout the year, in Guyaz, Idaho, there are 85.8 snowfall days, and 40.94" (1040mm) of snow is accumulated.

Daylight

With an average of 9h and 0min of daylight, December has the shortest days of the year in Guyaz.
On the first day of December in Guyaz, sunrise is at 7:40 am and sunset at 4:51 pm. On the last day of the month, sunrise is at 7:59 am and sunset at 5:00 pm MST.

Sunshine

In Guyaz, the average sunshine in December is 4.9h.

UV index

The months with the lowest UV index are January, February and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for the average person.
Note: The daily high UV index of 1 during December translates into the following recommendations:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
[Resources]

Frequently asked questions

What is the coldest month in Guyaz?

December, with its average high-temperature of 27°F (-2.8°C) and an average low-temperature of 14.4°F (-9.8°C), holds the record as the coldest month in Guyaz.

How cold is it in Guyaz in December?

In Guyaz, 27°F (-2.8°C) is the average high-temperature and 14.4°F (-9.8°C) is the average low-temperature during December. The average heat index (a.k.a. 'real feel', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, in July is appraised at 82.4°F (28°C).

What is the average humidity in December in Guyaz?

In Guyaz, the average relative humidity in December is 88%.

How many days does it rain in December in Guyaz?

In Guyaz, Idaho, in December, during 5.3 rainfall days, 0.98" (25mm) of precipitation is typically accumulated.

How many days does it snow in December in Guyaz?

In December, in Guyaz, Idaho, it is snowing for 16.9 days. Throughout December, 7.28" (185mm) of snow is accumulated.

What is the month with the shortest days in Guyaz?

With an average of 9h and 0min of daylight, December has the shortest days of the year in Guyaz, Idaho.

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

In December, the average day length is 9h and 1min.

What time are sunrise and sunset in December in Guyaz?

On the first day of December in Guyaz, Idaho, sunrise is at 7:40 am and sunset at 4:51 pm. On the last day of the month, sunrise is at 7:59 am and sunset at 5:00 pm MST.

How many hours of sunshine does Guyaz have in December?

In December, the average sunshine duration is 4.9h.

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

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

What is the UV index intensity in December in Guyaz?

In Guyaz, Idaho, the average daily maximum UV index in December is 1. A UV Index reading of 2, and below, represents a minimal hazard to health from unsafe 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
Guyaz, ID

Average temperature in December - Guyaz, ID
  • Average high temperature in December: 27°F

The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is December (27°F).

  • Average low temperature in December: 14.4°F

The month with the highest average low temperature is July (52.7°F).
The coldest month (with the lowest average low temperature) is January (13.1°F).

[Resources]

Average pressure in December
Guyaz, ID

Average pressure in December - Guyaz, 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).

[Resources]

Average wind speed in December
Guyaz, ID

Average wind speed in December - Guyaz, ID
  • Average wind speed in December: 5.6mph

The windiest month (with the highest average wind speed) is June (7.8mph).
The calmest month (with the lowest average wind speed) is January (5.5mph).

[Resources]

Average humidity in December
Guyaz, ID

Average humidity in December - Guyaz, ID
  • Average humidity in December: 88%

The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is August (39%).

[Resources]

Average rainfall in December
Guyaz, ID

Average rainfall in December - Guyaz, ID
  • Average rainfall in December: 0.98"

The wettest month (with the highest rainfall) is May (1.54").
The driest month (with the least rainfall) is July (0.55").

[Resources]

Average rainfall days in December
Guyaz, ID

Average rainfall days in December - Guyaz, ID
  • Average rainfall days in December: 5.3 days

The month with the highest number of rainy days is May (13.5 days).
The month with the least rainy days is January (3 days).

[Resources]

Average snowfall in December
Guyaz, ID

Average snowfall in December - Guyaz, ID
  • Average snowfall in December: 7.28"

The month with the highest snowfall is January (8.11").
The months with the least snowfall are June, July and August (0").

[Resources]

Average snowfall days in December
Guyaz, ID

Average snowfall days in December - Guyaz, ID
  • Average snowfall days in December: 16.9 days

The month with the highest number of snowfall days is December (16.9 days).
The months with the least snowfall days are July and August (0 days).

[Resources]

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

Average daylight in December / Average sunshine in December - Guyaz, 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: 4h and 5min

The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).

[Resources]

Average sunshine days in December
Guyaz, ID

Average sunshine days in December - Guyaz, ID
  • Average sunshine days in December: 13.2 days

The month with the most sunshine days is July (19.8 days).
The month with the least sunshine days is February (10.3 days).

[Resources]

Average UV index in December
Guyaz, ID

Average UV index in December - Guyaz, 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, February and December (UV index 1).

[Resources]

Average cloud cover in December
Guyaz, ID

Average cloud cover in December - Guyaz, ID
  • Average cloud cover in December: 53

The month with the most cloud cover is February (Cloud cover 56).
The months with the least cloud cover are July and August (Cloud cover 12).

[Resources]

Average visibility in December
Guyaz, ID

Average visibility in December - Guyaz, 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).

[Resources]

Guyaz, Idaho, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location