Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
December, characterized by an average high temperature of 29.3°F (-1.5°C) and a low temperature of 18°F (-7.8°C), is generally the coldest month.Humidity
In December, the average relative humidity is 84%.Rainfall
In December, the rain falls for 8.5 days. Throughout December, 0.91" (23mm) of precipitation is accumulated. In Rockland, during the entire year, the rain falls for 108.7 days and collects up to 10.47" (266mm) of precipitation.Snowfall
Months with snowfall are January through May, September through December. In Rockland, Idaho, during December, snow falls for 13.7 days and regularly aggregates up to 5.28" (134mm) of snow. Throughout the year, there are 57.1 snowfall days, and 25.2" (640mm) of snow is accumulated.Daylight
With an average of 9h and 6min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:42 am and sunset at 4:59 pm. On the last day of December, sunrise is at 8:01 am and sunset at 5:08 pm MST.
Sunshine
In December, the average sunshine in Rockland is 5.2h.UV index
With an average maximum UV index of 1, December is the month with the lowest UV index in Rockland, Idaho. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: In December, a daily UV index of 1 turns into the following recommendations:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Frequently asked questions
What month is the coldest in Rockland?
How cold is it in Rockland in December?
What is the average humidity in December in Rockland?
How many days does it rain in December in Rockland?
How much does it snow in Rockland in December?
What is the month with the shortest days in Rockland?
What is the average length of the day in December in Rockland?
When are sunrise and sunset in December in Rockland?
How long on average sun shines in December in Rockland?
What is the month with the lowest UV index in Rockland?
What is the UV index reading in December in Rockland?
Average temperature in December
Rockland, ID
- Average high temperature in December: 29.3°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 (29.3°F).
- Average low temperature in December: 18°F
The month with the highest average low temperature is August (58.5°F).
The coldest months (with the lowest average low temperature) are January and December (18°F).
Average pressure in December
Rockland, ID
- Average pressure in December: 30.26"Hg
The month with the highest atmospheric pressure is January (30.3"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in December
Rockland, ID
- Average wind speed in December: 7mph
The windiest month (with the highest average wind speed) is April (9.6mph).
The calmest months (with the lowest average wind speed) are January and December (7mph).
Average humidity in December
Rockland, ID
- Average humidity in December: 84%
The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is August (32%).
Average rainfall in December
Rockland, ID
- Average rainfall in December: 0.91"
The wettest month (with the highest rainfall) is March (1.18").
The driest month (with the least rainfall) is July (0.59").
Average rainfall days in December
Rockland, ID
- Average rainfall days in December: 8.5 days
The month with the highest number of rainy days is March (12.5 days).
The month with the least rainy days is January (6.4 days).
Average snowfall in December
Rockland, ID
- Average snowfall in December: 5.28"
The month with the highest snowfall is January (7.2").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Rockland, ID
- Average snowfall days in December: 13.7 days
The month with the highest number of snowfall days is December (13.7 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in December /
Average sunshine in December
Rockland, ID
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 5h and 1min
The months with the most sunshine are June and July (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 5h and 6min).
Average sunshine days in December
Rockland, ID
- Average sunshine days in December: 15.5 days
The month with the most sunshine days is October (20.3 days).
The month with the least sunshine days is February (12.4 days).
Average UV index in December
Rockland, ID
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Rockland, ID
- Average cloud cover in December: 47
The months with the most cloud cover are February and December (Cloud cover 47).
The months with the least cloud cover are July and August (Cloud cover 11).
Average visibility in December
Rockland, ID
- Average visibility in December: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).
Rockland, Idaho, USA
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