December weather forecast
Mullan, ID

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Weather in December

The first month of the winter, December, is still a freezing cold month in Mullan, Idaho, with temperature in the range of an average high of 27.9°F (-2.3°C) and an average low of 16.9°F (-8.4°C).

Temperature

The coldest time of the year is December, with temperatures averaging a high of 27.9°F (-2.3°C) and a low of 16.9°F (-8.4°C).

Humidity

In December, the average relative humidity is 92%.

Rainfall

In Mullan, during December, the rain falls for 3.3 days and regularly aggregates up to 3.31" (84mm) of precipitation. Throughout the year, there are 88.5 rainfall days, and 25.12" (638mm) of precipitation is accumulated.

Snowfall

January through June, September through December are months with snowfall in Mullan. In Mullan, Idaho, in December, during 20.5 snowfall days, 27.2" (691mm) of snow is typically accumulated. In Mullan, during the entire year, snow falls for 133.2 days and aggregates up to 146.61" (3724mm) of snow.

Daylight

With an average of 8h and 30min of daylight, December has the shortest days of the year.
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

In Mullan, the average sunshine in December is 3.6h.

UV index

January, February, November and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: A daily maximum UV index of 1 in December translates into the following instructions:
Long-term sun exposure is typically not a concern for most. However, those with sensitive skin, infants, and children must always have protection. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
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Frequently asked questions

What is the coldest month in Mullan?

In Mullan, the lowest temperatures are generally noted in December, averaging a high of 27.9°F (-2.3°C) and a low of 16.9°F (-8.4°C).

How cold is December in Mullan?

December temperatures in Mullan vary between a high-temperature of 27.9°F (-2.3°C) and a low-temperature of 16.9°F (-8.4°C).

What is the average humidity in December in Mullan?

The average relative humidity in December in Mullan is 92%.

How much does it rain in Mullan in December?

In Mullan, Idaho, during December, the rain falls for 3.3 days and regularly aggregates up to 3.31" (84mm) of precipitation.

How much does it snow in Mullan in December?

In Mullan, in December, during 20.5 snowfall days, 27.2" (691mm) of snow is typically accumulated.

What is the month with the shortest days in Mullan?

With an average of 8h and 30min of daylight, December has the shortest days of the year in Mullan, Idaho.

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

In Mullan, the average day length in December is 8h and 31min.

When are sunrise and sunset in December in Mullan?

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.

How many hours of sunshine does Mullan have in December?

In December, the average sunshine duration in Mullan, Idaho, is 3.6h.

When is the lowest UV index in Mullan?

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

What is the UV index intensity in December in Mullan?

The average daily maximum UV index in December in Mullan, Idaho, is 1. A UV Index value of 2, and less, symbolizes a low health threat from unprotected exposure to UV radiation.
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
Mullan, ID

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).

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Average pressure in December
Mullan, ID

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).

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Average wind speed in December
Mullan, ID

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).

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Average humidity in December
Mullan, ID

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%).

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Average rainfall in December
Mullan, ID

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").

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Average rainfall days in December
Mullan, ID

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).

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Average snowfall in December
Mullan, ID

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").

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Average snowfall days in December
Mullan, ID

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).

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

Average daylight in December / Average sunshine in December - Mullan, ID
  • Average daylight in December: 8h and 3min

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 4min

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).

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Average sunshine days in December
Mullan, ID

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).

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Average UV index in December
Mullan, ID

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).

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Average cloud cover in December
Mullan, ID

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).

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Average visibility in December
Mullan, ID

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).

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Mullan, Idaho, USA

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