December weather forecast
Yakima, WA

The sweetly illuminated city of Yakima, Washington
The sweetly illuminated city of Yakima, Washington

Weather in December

The first month of the winter, December, is still a cold month in Yakima, Washington, with an average temperature fluctuating between 36.9°F (2.7°C) and 25.5°F (-3.6°C).

Temperature

With an average high-temperature of 36.9°F (2.7°C) and an average low-temperature of 25.5°F (-3.6°C), December is the coldest month.

Humidity

In December, the average relative humidity in Yakima, Washington, is 80%.

Rainfall

In Yakima, during 9.1 rainfall days, 0.83" (21mm) of precipitation is typically accumulated. Throughout the year, there are 82.2 rainfall days, and 5.43" (138mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Yakima are January through March, September, November and December. The month with the most snowfall is December, when snow falls for 5.4 days and typically aggregates up to 2.76" (70mm) of snow.

Daylight

With an average of 8h and 38min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 7:25 am and sunset at 4:16 pm. On the last day of December, sunrise is at 7:46 am and sunset at 4:24 pm PST.

Sunshine

The average sunshine in December is 5.9h.

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 vulnerability from unsafe exposure to UV radiation for average individuals.
Note: The daily maximum UV index of 2 in December interpret into the following advice:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the coldest month in Yakima?

With an average high-temperature of 36.9°F (2.7°C) and an average low-temperature of 25.5°F (-3.6°C), December is the coldest month in Yakima.

What is the average humidity in December in Yakima?

In December, the average relative humidity in Yakima, Washington, is 80%.

How much does it rain in Yakima in December?

In Yakima, Washington, in December, it is raining for 9.1 days, with typically 0.83" (21mm) of accumulated precipitation.

When does it snow the most in Yakima?

December is the month with the most snowfall in Yakima. Snow falls for 5.4 days and accumulates 2.76" (70mm) of snow.

How much does it snow in Yakima in December?

In December, it is snowing for 5.4 days. Throughout December, 2.76" (70mm) of snow is accumulated.

What is the month with the shortest days in Yakima?

With an average of 8h and 38min of daylight, December has the shortest days of the year.

How many hours of daylight does Yakima have in December?

In Yakima, the average day length in December is 8h and 38min.

When is the sunrise / sunset in December in Yakima?

In December, on the first day of the month, sunrise is at 7:25 am and sunset at 4:16 pm. On the last day of the month, in Yakima, Washington, sunrise is at 7:46 am and sunset at 4:24 pm PST.

How many hours of sunshine does Yakima have in December?

The average sunshine duration in December is 5.9h.

When is the lowest UV index in Yakima?

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 Yakima?

The average daily maximum UV index in December in Yakima, Washington, is 2. A UV Index value of 2, and less, symbolizes a low health risk from unsafe exposure to Sun's UV rays.
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
Yakima, WA

Average temperature in December - Yakima, WA
  • Average high temperature in December: 36.9°F

The warmest month (with the highest average high temperature) is August (86.5°F).
The month with the lowest average high temperature is December (36.9°F).

  • Average low temperature in December: 25.5°F

The month with the highest average low temperature is August (60.3°F).
The coldest month (with the lowest average low temperature) is December (25.5°F).

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Average pressure in December
Yakima, WA

Average pressure in December - Yakima, 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 (29.93"Hg).

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Average wind speed in December
Yakima, WA

Average wind speed in December - Yakima, WA
  • Average wind speed in December: 4.4mph

The windiest month (with the highest average wind speed) is June (7.1mph).
The calmest month (with the lowest average wind speed) is December (4.4mph).

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Average humidity in December
Yakima, WA

Average humidity in December - Yakima, WA
  • Average humidity in December: 80%

The month with the highest relative humidity is January (81%).
The months with the lowest relative humidity are July and August (39%).

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Average rainfall in December
Yakima, WA

Average rainfall in December - Yakima, WA
  • Average rainfall in December: 0.83"

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

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Average rainfall days in December
Yakima, WA

Average rainfall days in December - Yakima, WA
  • Average rainfall days in December: 9.1 days

The month with the highest number of rainy days is March (10.8 days).
The month with the least rainy days is August (2 days).

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Average snowfall in December
Yakima, WA

Average snowfall in December - Yakima, WA
  • Average snowfall in December: 2.76"

The month with the highest snowfall is December (2.76").
The months with the least snowfall are April, May, June, July, August and October (0").

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Average snowfall days in December
Yakima, WA

Average snowfall days in December - Yakima, WA
  • Average snowfall days in December: 5.4 days

The month with the highest number of snowfall days is December (5.4 days).
The months with the least snowfall days are May, June, July, August and October (0 days).

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

Average daylight in December / Average sunshine in December - Yakima, WA
  • Average daylight in December: 8h and 38min

The month with the longest days is June (Average daylight: 15h and 47min).
The month with the shortest days is December (Average daylight: 8h and 38min).

  • Average sunshine in December: 5h and 54min

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 36min).

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Average sunshine days in December
Yakima, WA

Average sunshine days in December - Yakima, WA
  • Average sunshine days in December: 17.3 days

The month with the most sunshine days is July (27.5 days).
The month with the least sunshine days is February (15.8 days).

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Average UV index in December
Yakima, WA

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

The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in December
Yakima, WA

Average cloud cover in December - Yakima, WA
  • Average cloud cover in December: 37

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).

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Average visibility in December
Yakima, WA

Average visibility in December - Yakima, 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).

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