December weather forecastGuyaz, ID
December
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.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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).
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).
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).
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%).
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").
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).
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").
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).
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 54min
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).
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).
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).
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).
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).
