December weather forecast
Cowiche, WA

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Weather in December

December, the first month of the winter in Cowiche, is also a wintry month, with temperature in the range of an average low of 23.9°F (-4.5°C) and an average high of 36°F (2.2°C).

Temperature

In Cowiche, December records the lowest average temperatures, peaking at 36°F (2.2°C) and reaching a low of 23.9°F (-4.5°C).

Humidity

In December, the average relative humidity is 82%.

Rainfall

December is the month with the most rainfall. Rain falls for 9.2 days and accumulates 0.87" (22mm) of precipitation.

Snowfall

Months with snowfall are January through April, September, November and December. December is the month with the most snowfall. Snow falls for 5.7 days and accumulates 3.07" (78mm) of snow.

Daylight

With an average of 8h and 36min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 7:27 am and sunset at 4:16 pm. On the last day of December, sunrise is at 7:47 am and sunset at 4:25 pm PST.

Sunshine

The average sunshine in December is 5.8h.

UV index

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: The maximum UV index, 2 during December, leads to the following recommendations:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
Updated: Aug 31, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the coldest time of year?

December proves to be the coldest month in Cowiche, recording an average maximum temperature of 36°F (2.2°C) and a minimum temperature of 23.9°F (-4.5°C).

How cold is it in December?

The average high-temperature and low-temperature during December are 36°F (2.2°C) and 23.9°F (-4.5°C) respectively. The average heat index (a.k.a. 'apparent temperature', 'feels like'), which combines air temperature and relative humidity, in August is calculated to be 84.2°F (29°C).

What is the average humidity in December?

In Cowiche, the average relative humidity in December is 82%.

What is the rainiest month?

The month with the most rainfall is December, when the rain falls for 9.2 days and typically aggregates up to 0.87" (22mm) of precipitation.

How much does it rain in Cowiche in December?

In Cowiche, in December, during 9.2 rainfall days, 0.87" (22mm) of precipitation is typically accumulated.

When does it snow the most?

The month with the most snowfall in Cowiche is December, when snow falls for 5.7 days and typically aggregates up to 3.07" (78mm) of snow.

How much does it snow in December?

In Cowiche, in December, during 5.7 snowfall days, 3.07" (78mm) 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 36min of daylight.

What is the average length of the day in December?

The average day length in December is 8h and 38min.

What time are sunrise and sunset in December?

On the first day of December in Cowiche, sunrise is at 7:27 am and sunset at 4:16 pm. On the last day of the month, sunrise is at 7:47 am and sunset at 4:25 pm PST.

How many hours of sunshine does Cowiche have in December?

The average sunshine duration in December is 5.8h.

What are the months with the lowest UV index?

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

What is the UV index reading in December?

In December, the average daily maximum UV index is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability 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
Cowiche, WA

Average temperature in December - Cowiche, WA
  • Average high temperature in December: 36°F

The warmest month (with the highest average high temperature) is August (85.1°F).
The month with the lowest average high temperature is December (36°F).

  • Average low temperature in December: 23.9°F

The month with the highest average low temperature is August (58.8°F).
The coldest month (with the lowest average low temperature) is December (23.9°F).

Average pressure in December
Cowiche, WA

Average pressure in December - Cowiche, WA
  • Average pressure in December: 30.13"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is August (29.93"Hg).

Average wind speed in December
Cowiche, WA

Average wind speed in December - Cowiche, WA
  • Average wind speed in December: 4.2mph

The windiest month (with the highest average wind speed) is June (7.4mph).
The calmest month (with the lowest average wind speed) is December (4.2mph).

Average humidity in December
Cowiche, WA

Average humidity in December - Cowiche, WA
  • Average humidity in December: 82%

The month with the highest relative humidity is January (83%).
The months with the lowest relative humidity are July and August (41%).

Average rainfall in December
Cowiche, WA

Average rainfall in December - Cowiche, WA
  • Average rainfall in December: 0.87"

The wettest month (with the highest rainfall) is December (0.87").
The driest month (with the least rainfall) is July (0.08").

Average rainfall days in December
Cowiche, WA

Average rainfall days in December - Cowiche, WA
  • Average rainfall days in December: 9.2 days

The month with the highest number of rainy days is March (10.8 days).
The month with the least rainy days is July (2.3 days).

Average snowfall in December
Cowiche, WA

Average snowfall in December - Cowiche, WA
  • Average snowfall in December: 3.07"

The month with the highest snowfall is December (3.07").
The months with the least snowfall are May, June, July, August and October (0").

Average snowfall days in December
Cowiche, WA

Average snowfall days in December - Cowiche, WA
  • Average snowfall days in December: 5.7 days

The month with the highest number of snowfall days is December (5.7 days).
The months with the least snowfall days are May, June, July, August and October (0 days).

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

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

The months with the most sunshine are July and August (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 30min).

Average sunshine days in December
Cowiche, WA

Average sunshine days in December - Cowiche, WA
  • Average sunshine days in December: 17.9 days

The month with the most sunshine days is July (27.6 days).
The month with the least sunshine days is February (15.5 days).

Average UV index in December
Cowiche, WA

Average UV index in December - Cowiche, 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
Cowiche, WA

Average cloud cover in December - Cowiche, WA
  • Average cloud cover in December: 38

The month with the most cloud cover is January (Cloud cover 40).
The months with the least cloud cover are July and August (Cloud cover 9).

Average visibility in December
Cowiche, WA

Average visibility in December - Cowiche, WA
  • Average visibility in December: 6mi

The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).

Cowiche, Washington, USA

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