December weather forecast
Twisp, WA

Weather in December

The first month of the winter, December, is also a subzero cold month in Twisp, Washington, with temperature in the range of an average low of 14.7°F (-9.6°C) and an average high of 27.9°F (-2.3°C).

Temperature

December is the coldest month, with an average high-temperature of 27.9°F (-2.3°C) and an average low-temperature of 14.7°F (-9.6°C).

Humidity

In December, the average relative humidity is 90%.

Rainfall

The month with the most rainfall is December, when the rain falls for 10.2 days and typically aggregates up to 2.52" (64mm) of precipitation.

Snowfall

January through April, September through December are months with snowfall in Twisp. The month with the most snowfall in Twisp is December, when snow falls for 15.5 days and typically aggregates up to 12.28" (312mm) of snow.

Daylight

December has the shortest days of the year, with an average of 8h and 24min of daylight.
On the first day of the month, sunrise is at 7:30 am and sunset at 4:08 pm. On the last day of December, sunrise is at 7:51 am and sunset at 4:15 pm PST.

Sunshine

In Twisp, the average sunshine in December is 4.5h.

UV index

In December, the average daily maximum UV index in Twisp is 2. A UV Index of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In December, the average maximum UV index of 2 translate into the following recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. 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 Twisp?

December is the coldest month in Twisp, Washington, with an average high-temperature of 27.9°F (-2.3°C) and an average low-temperature of 14.7°F (-9.6°C).

What is the average humidity in December in Twisp?

The average relative humidity in December in Twisp is 90%.

What is the rainiest month in Twisp?

The month with the most rainfall in Twisp, Washington, is December, when the rain falls for 10.2 days and typically aggregates up to 2.52" (64mm) of precipitation.

How much does it rain in Twisp in December?

In Twisp, in December, during 10.2 rainfall days, 2.52" (64mm) of precipitation is typically accumulated.

When does it snow the most in Twisp?

The month with the most snowfall in Twisp is December, when snow falls for 15.5 days and typically aggregates up to 12.28" (312mm) of snow.

How much does it snow in Twisp in December?

In Twisp, Washington, during December, snow falls for 15.5 days and regularly aggregates up to 12.28" (312mm) of snow.

What is the month with the shortest days in Twisp?

The month with the shortest days in Twisp, Washington, is December, with an average of 8h and 24min of daylight.

How many hours of daylight does Twisp have in December?

In Twisp, Washington, the average day length in December is 8h and 24min.

When is the sunrise / sunset in December in Twisp?

On the first day of December in Twisp, sunrise is at 7:30 am and sunset at 4:08 pm. On the last day of the month, sunrise is at 7:51 am and sunset at 4:15 pm PST.

How many hours of sunshine does Twisp have in December?

In Twisp, Washington, the average sunshine duration in December is 4.5h.

How high is the UV index in December in Twisp?

In December, the average daily maximum UV index in Twisp is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to Sun's UV rays.

Average temperature in December
Twisp, WA

Average temperature in December - Twisp, WA
  • Average high temperature in December: -2.3°C

The warmest month (with the highest average high temperature) is August (24.9°C).
The month with the lowest average high temperature is December (-2.3°C).

  • Average low temperature in December: -9.6°C

The month with the highest average low temperature is August (9.4°C).
The coldest month (with the lowest average low temperature) is December (-9.6°C).

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Average pressure in December
Twisp, WA

Average pressure in December - Twisp, WA
  • Average pressure in December: 1020.6mbar

The month with the highest atmospheric pressure is January (1021.1mbar).
The month with the lowest atmospheric pressure is August (1014mbar).

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Average wind speed in December
Twisp, WA

Average wind speed in December - Twisp, WA
  • Average wind speed in December: 5.6km/h

The windiest month (with the highest average wind speed) is July (8.2km/h).
The calmest months (with the lowest average wind speed) are January and December (5.6km/h).

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Average humidity in December
Twisp, WA

Average humidity in December - Twisp, WA
  • Average humidity in December: 90%

The months with the highest relative humidity are January and February (92%).
The months with the lowest relative humidity are July and August (51%).

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Average rainfall in December
Twisp, WA

Average rainfall in December - Twisp, WA
  • Average rainfall in December: 64mm

The wettest month (with the highest rainfall) is December (64mm).
The driest month (with the least rainfall) is July (9mm).

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Average rainfall days in December
Twisp, WA

Average rainfall days in December - Twisp, WA
  • Average rainfall days in December: 10.2 days

The month with the highest number of rainy days is March (17.1 days).
The month with the least rainy days is August (5.7 days).

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Average snowfall in December
Twisp, WA

Average snowfall in December - Twisp, WA
  • Average snowfall in December: 312mm

The month with the highest snowfall is December (312mm).
The months with the least snowfall are May, June, July and August (0mm).

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Average snowfall days in December
Twisp, WA

Average snowfall days in December - Twisp, WA
  • Average snowfall days in December: 15.5 days

The month with the highest number of snowfall days is December (15.5 days).
The months with the least snowfall days are June, July and August (0 days).

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

Average daylight in December / Average sunshine in December - Twisp, WA
  • Average daylight in December: 8h and 24min

The month with the longest days is June (Average daylight: 16h and 2min).
The month with the shortest days is December (Average daylight: 8h and 24min).

  • Average sunshine in December: 4.5h

The months with the most sunshine are July and August (Average sunshine: 11.9h).
The month with the least sunshine is January (Average sunshine: 4.2h).

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Average sunshine days in December
Twisp, WA

Average sunshine days in December - Twisp, WA
  • Average sunshine days in December: 12.1 days

The month with the most sunshine days is August (22.8 days).
The month with the least sunshine days is March (8.9 days).

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Average UV index in December
Twisp, WA

Average UV index in December - Twisp, 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 and November (UV index 1).

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Average cloud cover in December
Twisp, WA

Average cloud cover in December - Twisp, WA
  • Average cloud cover in December: 53

The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is August (Cloud cover 14).

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Average visibility in December
Twisp, WA

Average visibility in December - Twisp, WA
  • Average visibility in December: 6km

The months with the highest visibility are June, July, August and September (10km).
The month with the lowest visibility is January (5km).

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