December weather forecastMullan, ID
December
Weather in December
The first month of the winter, December, is also a subzero cold month in Mullan, Idaho, with an average temperature ranging between min 16.9°F (-8.4°C) and max 27.9°F (-2.3°C).Temperature
In Mullan, the lowest average temperatures are observed in December, with a high of 27.9°F (-2.3°C) and a low of 16.9°F (-8.4°C).Humidity
The average relative humidity in December is 92%.Rainfall
In Mullan, during December, the rain falls for 3.3 days and regularly aggregates up to 3.31" (84mm) of precipitation. In Mullan, Idaho, during the entire year, the rain falls for 88.5 days and collects up to 25.12" (638mm) of precipitation.Snowfall
Months with snowfall are January through June, September through December. In Mullan, during December, snow falls for 20.5 days and regularly aggregates up to 27.2" (691mm) of snow. Throughout the year, there are 133.2 snowfall days, and 146.61" (3724mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 8h and 30min of daylight.On the first day of December, sunrise is at 7:10 am and sunset at 3:54 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 4:02 pm PST.
Sunshine
The average sunshine in December is 3.6h.UV index
The months with the lowest UV index in Mullan are January, February, November and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low health risk from unsafe exposure to UV radiation for average individuals.Note: The UV index of 1 during December translates into the following guidance:
While many people can endure lengthy sun exposure, it remains imperative to safeguard babies, children, and fair-skinned individuals. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Mullan, ID
- Average high temperature in December: 27.9°F
The warmest month (with the highest average high temperature) is August (77°F).
The month with the lowest average high temperature is December (27.9°F).
- Average low temperature in December: 16.9°F
The month with the highest average low temperature is August (47.3°F).
The coldest month (with the lowest average low temperature) is December (16.9°F).
Average pressure in December
Mullan, ID
- Average pressure in December: 30.18"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The months with the lowest atmospheric pressure are June and August (29.93"Hg).
Average wind speed in December
Mullan, ID
- Average wind speed in December: 4.2mph
The windiest month (with the highest average wind speed) is April (4.9mph).
The calmest months (with the lowest average wind speed) are August and September (4.1mph).
Average humidity in December
Mullan, ID
- Average humidity in December: 92%
The month with the highest relative humidity is January (93%).
The months with the lowest relative humidity are July and August (54%).
Average rainfall in December
Mullan, ID
- Average rainfall in December: 3.31"
The wettest month (with the highest rainfall) is January (3.58").
The driest month (with the least rainfall) is July (0.39").
Average rainfall days in December
Mullan, ID
- Average rainfall days in December: 3.3 days
The month with the highest number of rainy days is May (13.3 days).
The months with the least rainy days are January and February (2.8 days).
Average snowfall in December
Mullan, ID
- Average snowfall in December: 27.2"
The month with the highest snowfall is January (29.53").
The months with the least snowfall are July and August (0").
Average snowfall days in December
Mullan, ID
- Average snowfall days in December: 20.5 days
The month with the highest number of snowfall days is March (22.1 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in December /
Average sunshine in December
Mullan, ID
- Average daylight in December: 8h and 30min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in December: 3h and 36min
The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in December
Mullan, ID
- Average sunshine days in December: 10.8 days
The month with the most sunshine days is August (23.2 days).
The month with the least sunshine days is March (7.5 days).
Average UV index in December
Mullan, ID
- Average UV index in December: 1
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in December
Mullan, ID
- Average cloud cover in December: 65
The month with the most cloud cover is February (Cloud cover 67).
The months with the least cloud cover are July and August (Cloud cover 15).
Average visibility in December
Mullan, ID
- Average visibility in December: 3mi
The months with the highest visibility are June, July, August and September (6mi).
The month with the lowest visibility is January (2mi).
