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
Temperature records mark December as the coldest month, with highs averaging 34°F (1.1°C) and lows at 24.1°F (-4.4°C).Humidity
The average relative humidity in December is 86%.Rainfall
The month with the most rainfall is December, when the rain falls for 11.6 days and typically aggregates up to 2.68" (68mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. In Princeton, in December, during 14.1 snowfall days, 11.14" (283mm) of snow is typically accumulated. In Princeton, during the entire year, snow falls for 60.2 days and aggregates up to 47.24" (1200mm) of snow.Daylight
With an average of 8h and 36min of daylight, December has the shortest days of the year in Princeton, Idaho.On the first day of December, sunrise is at 7:12 am and sunset at 4:00 pm. On the last day of the month, sunrise is at 7:32 am and sunset at 4:08 pm PST.
Sunshine
January, February and December, with an average of 4.5h of sunshine, are months with the least sunshine in Princeton.UV index
The average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for the average person.Note: In December, the maximum UV index of 2 translates into these guidelines:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the coldest in Princeton?
How cold is December in Princeton?
What is the average humidity in December in Princeton?
What is the wettest month in Princeton?
How much does it rain in Princeton in December?
How much does it snow in Princeton in December?
What is the month with the shortest days in Princeton?
How many hours of daylight does Princeton have in December?
When are sunrise and sunset in December in Princeton?
What is the month with the least sunshine in Princeton?
How long on average sun shines in December in Princeton?
How high is the UV index in December in Princeton?
Average temperature in December
Princeton, ID
- Average high temperature in December: 34°F
The warmest month (with the highest average high temperature) is August (83.7°F).
The month with the lowest average high temperature is December (34°F).
- Average low temperature in December: 24.1°F
The month with the highest average low temperature is August (58.1°F).
The coldest month (with the lowest average low temperature) is December (24.1°F).
Average pressure in December
Princeton, ID
- Average pressure in December: 30.17"Hg
The month with the highest atmospheric pressure is January (30.2"Hg).
The month with the lowest atmospheric pressure is August (29.91"Hg).
Average wind speed in December
Princeton, ID
- Average wind speed in December: 5.6mph
The windiest month (with the highest average wind speed) is April (6.3mph).
The calmest months (with the lowest average wind speed) are July, August and September (4.8mph).
Average humidity in December
Princeton, ID
- Average humidity in December: 86%
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is August (40%).
Average rainfall in December
Princeton, ID
- Average rainfall in December: 2.68"
The wettest month (with the highest rainfall) is December (2.68").
The driest months (with the least rainfall) are July and August (0.47").
Average rainfall days in December
Princeton, ID
- Average rainfall days in December: 11.6 days
The month with the highest number of rainy days is April (18.1 days).
The months with the least rainy days are July and August (5.9 days).
Average snowfall in December
Princeton, ID
- Average snowfall in December: 11.14"
The month with the highest snowfall is January (12.56").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Princeton, ID
- Average snowfall days in December: 14.1 days
The month with the highest number of snowfall days is December (14.1 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Princeton, ID
- Average daylight in December: 8h and 4min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in December: 4h and 3min
The month with the most sunshine is August (Average sunshine: 12h and 0min).
The months with the least sunshine are January, February and December (Average sunshine: 4h and 30min).
Average sunshine days in December
Princeton, ID
- Average sunshine days in December: 11.8 days
The month with the most sunshine days is July (23.3 days).
The month with the least sunshine days is February (9.2 days).
Average UV index in December
Princeton, ID
- Average UV index in December: 2
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in December
Princeton, ID
- Average cloud cover in December: 52
The month with the most cloud cover is February (Cloud cover 54).
The months with the least cloud cover are July and August (Cloud cover 12).
Average visibility in December
Princeton, ID
- Average visibility in December: 4mi
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 and December (4mi).
Princeton, Idaho, USA
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