December weather forecast
Maryhill, WA

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Weather in December

The first month of the winter, December, is also an icy month in Maryhill, Washington, with an average temperature fluctuating between 37.4°F (3°C) and 27°F (-2.8°C).

Temperature

December is the coldest month, with the temperature often reaching an average high of 37.4°F (3°C) and an average low of 27°F (-2.8°C).

Humidity

The average relative humidity in December is 83%.

Rainfall

In Maryhill, in December, it is raining for 12.6 days, with typically 1.73" (44mm) of accumulated precipitation. In Maryhill, during the entire year, the rain falls for 112.2 days and collects up to 10.91" (277mm) of precipitation.

Snowfall

January through March, November and December are months with snowfall. In December, it is snowing for 3.9 days. Throughout December, 2.09" (53mm) of snow is accumulated. In Maryhill, Washington, during the entire year, snow falls for 12.6 days and aggregates up to 7.6" (193mm) of snow.

Daylight

With an average of 8h and 48min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 7:24 am and sunset at 4:20 pm. On the last day of the month, sunrise is at 7:43 am and sunset at 4:29 pm PST.

Sunshine

In December, the average sunshine is 5.1h.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: In December, the UV index of 2 transforms into the following advice:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

Frequently asked questions

What are the coldest months?

Maryhill's coldest month, December, registers temperatures that range from a high of 37.4°F (3°C) to a low of 27°F (-2.8°C).

How cold is December?

In December, the average high-temperature and low-temperature are 37.4°F (3°C) and 27°F (-2.8°C) respectively. The average heat index (a.k.a. 'apparent temperature', 'feels like'), which represents the influence of relative humidity on air temperature, in August is estimated at 84.2°F (29°C).

What is the average humidity in December in Maryhill?

The average relative humidity in December is 83%.

How many days does it rain in December?

In December, the rain falls for 12.6 days. Throughout December, 1.73" (44mm) of precipitation is accumulated.

How many days does it snow in December?

In Maryhill, in December, during 3.9 snowfall days, 2.09" (53mm) of snow is typically accumulated.

What is the month with the shortest days?

December has the shortest days of the year, with an average of 8h and 48min of daylight.

What is the average length of the day in December?

In December, the average day length is 8h and 45min.

When is the sunrise / sunset in December?

On the first day of December, sunrise is at 7:24 am and sunset at 4:20 pm. On the last day of the month, sunrise is at 7:43 am and sunset at 4:29 pm PST.

How many hours of sunshine does Maryhill have in December?

In December, the average sunshine duration is 5.1h.

When is the lowest UV index?

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.

How high is the UV index in December?

In Maryhill, the average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a low health threat from exposure to the Sun's 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
Maryhill, WA

Average temperature in December - Maryhill, WA
  • Average high temperature in December: 37.4°F

The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is December (37.4°F).

  • Average low temperature in December: 27°F

The month with the highest average low temperature is August (57.9°F).
The coldest month (with the lowest average low temperature) is December (27°F).

Average pressure in December
Maryhill, WA

Average pressure in December - Maryhill, WA
  • Average pressure in December: 30.14"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is August (29.95"Hg).

Average wind speed in December
Maryhill, WA

Average wind speed in December - Maryhill, WA
  • Average wind speed in December: 5mph

The windiest month (with the highest average wind speed) is June (7.9mph).
The calmest months (with the lowest average wind speed) are January and December (5mph).

Average humidity in December
Maryhill, WA

Average humidity in December - Maryhill, WA
  • Average humidity in December: 83%

The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is August (46%).

Average rainfall in December
Maryhill, WA

Average rainfall in December - Maryhill, WA
  • Average rainfall in December: 1.73"

The wettest month (with the highest rainfall) is January (1.93").
The driest month (with the least rainfall) is July (0.12").

Average rainfall days in December
Maryhill, WA

Average rainfall days in December - Maryhill, WA
  • Average rainfall days in December: 12.6 days

The month with the highest number of rainy days is March (14.3 days).
The month with the least rainy days is July (2.9 days).

Average snowfall in December
Maryhill, WA

Average snowfall in December - Maryhill, WA
  • Average snowfall in December: 2.09"

The month with the highest snowfall is February (2.87").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in December
Maryhill, WA

Average snowfall days in December - Maryhill, WA
  • Average snowfall days in December: 3.9 days

The months with the highest number of snowfall days are February and December (3.9 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

Average daylight in December /
Average sunshine in December
Maryhill, WA

Average daylight in December / Average sunshine in December - Maryhill, WA
  • Average daylight in December: 8h and 5min

The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).

  • Average sunshine in December: 5h and 1min

The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 5h and 0min).

Average sunshine days in December
Maryhill, WA

Average sunshine days in December - Maryhill, WA
  • Average sunshine days in December: 13.8 days

The month with the most sunshine days is July (27 days).
The month with the least sunshine days is February (12.3 days).

Average UV index in December
Maryhill, WA

Average UV index in December - Maryhill, WA
  • Average UV index in December: 2

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in December
Maryhill, WA

Average cloud cover in December - Maryhill, WA
  • Average cloud cover in December: 46

The month with the most cloud cover is January (Cloud cover 49).
The months with the least cloud cover are July and August (Cloud cover 9).

Average visibility in December
Maryhill, WA

Average visibility in December - Maryhill, WA
  • 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).

Maryhill, Washington, USA

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