December weather forecast
Bothell, WA

Weather in December

The first month of the winter, December, is still a cold month in Bothell, Washington, with an average temperature varying between 42.6°F (5.9°C) and 35.1°F (1.7°C).

Temperature

With an average high-temperature of 42.6°F (5.9°C) and an average low-temperature of 35.1°F (1.7°C), December is the coldest month.

Humidity

The average relative humidity in December is 84%.

Rainfall

In Bothell, Washington, during December, the rain falls for 15.8 days and regularly aggregates up to 2.76" (70mm) of precipitation. Throughout the year, in Bothell, there are 166.9 rainfall days, and 21.93" (557mm) of precipitation is accumulated.

Snowfall

January through April, November and December are months with snowfall in Bothell. In Bothell, during December, snow falls for 1.1 days and regularly aggregates up to 0.24" (6mm) of snow. In Bothell, Washington, during the entire year, snow falls for 6.6 days and aggregates up to 2.6" (66mm) of snow.

Daylight

With an average of 8h and 29min of daylight, December has the shortest days of the year.
On the first day of December in Bothell, sunrise is at 7:36 am and sunset at 4:18 pm. On the last day of the month, sunrise is at 7:57 am and sunset at 4:26 pm PST.

Sunshine

The months with the least sunshine in Bothell are January and December, with an average of 4.4h of sunshine.

UV index

The months with the lowest UV index in Bothell, Washington, are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 2 in December interpret into the following advice:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. 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 Bothell?

The coldest month in Bothell, Washington, is December, with an average high-temperature of 42.6°F (5.9°C) and an average low-temperature of 35.1°F (1.7°C).

What is the average humidity in December in Bothell?

The average relative humidity in December in Bothell is 84%.

How much does it rain in Bothell in December?

In Bothell, Washington, in December, it is raining for 15.8 days, with typically 2.76" (70mm) of accumulated precipitation.

How many days does it snow in December in Bothell?

In Bothell, during December, snow falls for 1.1 days and regularly aggregates up to 0.24" (6mm) of snow.

What is the month with the shortest days in Bothell?

December has the shortest days of the year in Bothell, Washington, with an average of 8h and 29min of daylight.

How many hours of daylight does Bothell have in December?

In Bothell, Washington, the average day length in December is 8h and 29min.

What time are sunrise and sunset in December in Bothell?

In December, on the first day of the month, sunrise is at 7:36 am and sunset at 4:18 pm. On the last day of the month, in Bothell, sunrise is at 7:57 am and sunset at 4:26 pm PST.

What is the month with the least sunshine in Bothell?

January and December, with an average of 4.4h of sunshine, are months with the least sunshine in Bothell, Washington.

How long on average sun shines in December in Bothell?

In December, the average sunshine duration in Bothell, Washington, is 4.4h.

When is the lowest UV index in Bothell?

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

What is the UV index reading in December in Bothell?

In Bothell, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a minimal hazard to health 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
Bothell, WA

Average temperature in December - Bothell, WA
  • Average high temperature in December: 42.6°F

The warmest month (with the highest average high temperature) is August (74.8°F).
The month with the lowest average high temperature is December (42.6°F).

  • Average low temperature in December: 35.1°F

The month with the highest average low temperature is August (53.1°F).
The coldest months (with the lowest average low temperature) are February and December (35.1°F).

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Average pressure in December
Bothell, WA

Average pressure in December - Bothell, WA
  • Average pressure in December: 30.08"Hg

The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).

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Average wind speed in December
Bothell, WA

Average wind speed in December - Bothell, WA
  • Average wind speed in December: 4.9mph

The windiest months (with the highest average wind speed) are January and March (5.3mph).
The calmest month (with the lowest average wind speed) is August (3.4mph).

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Average humidity in December
Bothell, WA

Average humidity in December - Bothell, WA
  • Average humidity in December: 84%

The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is July (71%).

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Average rainfall in December
Bothell, WA

Average rainfall in December - Bothell, WA
  • Average rainfall in December: 2.76"

The wettest month (with the highest rainfall) is January (2.87").
The driest month (with the least rainfall) is July (0.43").

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Average rainfall days in December
Bothell, WA

Average rainfall days in December - Bothell, WA
  • Average rainfall days in December: 15.8 days

The month with the highest number of rainy days is November (17.9 days).
The month with the least rainy days is August (6.9 days).

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Average snowfall in December
Bothell, WA

Average snowfall in December - Bothell, WA
  • Average snowfall in December: 0.24"

The month with the highest snowfall is February (1.42").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in December
Bothell, WA

Average snowfall days in December - Bothell, WA
  • Average snowfall days in December: 1.1 days

The month with the highest number of snowfall days is February (2.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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

Average daylight in December / Average sunshine in December - Bothell, WA
  • Average daylight in December: 8h and 29min

The month with the longest days is June (Average daylight: 15h and 56min).
The month with the shortest days is December (Average daylight: 8h and 29min).

  • Average sunshine in December: 4h and 24min

The month with the most sunshine is August (Average sunshine: 10h and 42min).
The months with the least sunshine are January and December (Average sunshine: 4h and 24min).

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Average sunshine days in December
Bothell, WA

Average sunshine days in December - Bothell, WA
  • Average sunshine days in December: 12.7 days

The month with the most sunshine days is August (21.9 days).
The month with the least sunshine days is April (10.5 days).

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Average UV index in December
Bothell, WA

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

The months with the highest UV index are June and July (UV index 5).
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
Bothell, WA

Average cloud cover in December - Bothell, WA
  • Average cloud cover in December: 55

The months with the most cloud cover are January and December (Cloud cover 55).
The month with the least cloud cover is August (Cloud cover 24).

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Average visibility in December
Bothell, WA

Average visibility in December - Bothell, WA
  • Average visibility in December: 5mi

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

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