December weather forecast
Wishram Heights, WA

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Weather in December

December, the first month of the winter in Wishram Heights, is also an icy month, with temperature in the range of an average low of 27°F (-2.8°C) and an average high of 37.4°F (3°C).

Temperature

Wishram Heights'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).

Humidity

The average relative humidity in December is 83%.

Rainfall

In Wishram Heights, in December, it is raining for 12.6 days, with typically 1.73" (44mm) of accumulated precipitation. In Wishram Heights, 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 Wishram Heights, during December, snow falls for 3.9 days and regularly aggregates up to 2.09" (53mm) of snow. In Wishram Heights, during the entire year, snow falls for 12.6 days and aggregates up to 7.6" (193mm) of snow.

Daylight

December has the shortest days of the year, with an average of 8h and 48min of daylight.
On the first day of December, sunrise is at 7:24 am and sunset at 4:21 pm. On the last day of the month, sunrise is at 7:44 am and sunset at 4:30 pm PST.

Sunshine

In December, the average sunshine is 5.1h.

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 low threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: In December, a daily maximum UV index of 2 leads to the following instructions:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.

Frequently asked questions

What is the coldest month?

With its average high temperature of 37.4°F (3°C) and a low of 27°F (-2.8°C), December is regarded as the coldest month.

How cold is it in 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', 'felt air temperature'), 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?

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 much does it snow in December?

In December, it is snowing for 3.9 days. Throughout December, 2.09" (53mm) of snow is accumulated.

What is the month with the shortest days?

December has the shortest days of the year in Wishram Heights, 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 46min.

When is the sunrise / sunset in December?

On the first day of December, sunrise is at 7:24 am and sunset at 4:21 pm. On the last day of the month, sunrise is at 7:44 am and sunset at 4:30 pm PST.

How long on average sun shines in December in Wishram Heights?

The average sunshine duration in December is 5.1h.

When is the lowest UV index in Wishram Heights?

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?

The average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes 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
Wishram Heights, WA

Average temperature in December - Wishram Heights, 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
Wishram Heights, WA

Average pressure in December - Wishram Heights, 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
Wishram Heights, WA

Average wind speed in December - Wishram Heights, 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
Wishram Heights, WA

Average humidity in December - Wishram Heights, 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
Wishram Heights, WA

Average rainfall in December - Wishram Heights, 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
Wishram Heights, WA

Average rainfall days in December - Wishram Heights, 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
Wishram Heights, WA

Average snowfall in December - Wishram Heights, 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
Wishram Heights, WA

Average snowfall days in December - Wishram Heights, 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
Wishram Heights, WA

Average daylight in December / Average sunshine in December - Wishram Heights, 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
Wishram Heights, WA

Average sunshine days in December - Wishram Heights, 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
Wishram Heights, WA

Average UV index in December - Wishram Heights, 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
Wishram Heights, WA

Average cloud cover in December - Wishram Heights, 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
Wishram Heights, WA

Average visibility in December - Wishram Heights, 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).

Wishram Heights, Washington, USA

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