December weather forecast
Curtis, WA

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Weather in December

The first month of the winter, December, is also a wintry month in Curtis, Washington, with an average temperature fluctuating between 33.1°F (0.6°C) and 42.6°F (5.9°C).

Temperature

December is Curtis's coldest month, registering average high temperatures of 42.6°F (5.9°C) and lows of 33.1°F (0.6°C).

Humidity

January, February, November and December, with an average relative humidity of 89%, are the most humid months in Curtis.

Rainfall

In Curtis, in December, it is raining for 20 days, with typically 5.35" (136mm) of accumulated precipitation. Throughout the year, there are 185.5 rainfall days, and 36.1" (917mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Curtis are January through March, November and December. In December, it is snowing for 1.4 days. Throughout December, 0.28" (7mm) of snow is accumulated. Throughout the year, in Curtis, there are 9 snowfall days, and 5.59" (142mm) of snow is accumulated.

Daylight

With an average of 8h and 36min of daylight, December has the shortest days of the year in Curtis, Washington.
On the first day of the month, sunrise is at 7:36 am and sunset at 4:26 pm. On the last day of December, in Curtis, sunrise is at 7:56 am and sunset at 4:35 pm PST.

Sunshine

December has the least sunshine of the year in Curtis, with an average of 3.5h of sunshine.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Curtis. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: A maximum daily UV index of 2 during December morphs into the following directions:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. 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. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
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Frequently asked questions

What time of the year is the coldest in Curtis?

The coldest period in Curtis tends to be December, when average temperatures fluctuate between a high of 42.6°F (5.9°C) and a low of 33.1°F (0.6°C).

How cold does it get in Curtis in December?

Curtis in December has an average high-temperature of 42.6°F (5.9°C) and an average low-temperature of 33.1°F (0.6°C).

What are the most humid months in Curtis?

The months with the highest humidity in Curtis, Washington, are January, February, November and December, with an average relative humidity of 89%.

What is the average humidity in December in Curtis?

In December, the average relative humidity is 89%.

How many days does it rain in December in Curtis?

In Curtis, Washington, in December, it is raining for 20 days, with typically 5.35" (136mm) of accumulated precipitation.

How much does it snow in Curtis in December?

In December, in Curtis, Washington, it is snowing for 1.4 days. Throughout December, 0.28" (7mm) of snow is accumulated.

What is the month with the shortest days in Curtis?

December has the shortest days of the year in Curtis, Washington, with an average of 8h and 36min of daylight.

What is the average length of the day in December in Curtis?

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

When are sunrise and sunset in December in Curtis?

In December, on the first day of the month, sunrise is at 7:36 am and sunset at 4:26 pm. On the last day of the month, in Curtis, Washington, sunrise is at 7:56 am and sunset at 4:35 pm PST.

What is the month with the least sunshine in Curtis?

December has the least sunshine of the year in Curtis, Washington, with an average of 3.5h of sunshine.

How many hours of sunshine does Curtis have in December?

The average sunshine duration in December in Curtis, Washington, is 3.5h.

What is the month with the lowest UV index in Curtis?

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

What is the UV index reading in December in Curtis?

In December, the average daily maximum UV index in Curtis, Washington, is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unprotected exposure to 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
Curtis, WA

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

The warmest month (with the highest average high temperature) is August (77.5°F).
The month with the lowest average high temperature is December (42.6°F).

  • Average low temperature in December: 33.1°F

The month with the highest average low temperature is August (50°F).
The coldest month (with the lowest average low temperature) is December (33.1°F).

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Average pressure in December
Curtis, WA

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

The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are March, August and September (30.02"Hg).

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Average wind speed in December
Curtis, WA

Average wind speed in December - Curtis, WA
  • Average wind speed in December: 4.3mph

The windiest months (with the highest average wind speed) are January, March and November (4.5mph).
The calmest month (with the lowest average wind speed) is September (3.6mph).

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Average humidity in December
Curtis, WA

Average humidity in December - Curtis, WA
  • Average humidity in December: 89%

The months with the highest relative humidity are January, February, November and December (89%).
The month with the lowest relative humidity is July (73%).

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Average rainfall in December
Curtis, WA

Average rainfall in December - Curtis, WA
  • Average rainfall in December: 5.35"

The wettest month (with the highest rainfall) is January (5.51").
The driest month (with the least rainfall) is July (0.47").

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Average rainfall days in December
Curtis, WA

Average rainfall days in December - Curtis, WA
  • Average rainfall days in December: 20 days

The month with the highest number of rainy days is March (21.5 days).
The month with the least rainy days is August (6.4 days).

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Average snowfall in December
Curtis, WA

Average snowfall in December - Curtis, WA
  • Average snowfall in December: 0.28"

The month with the highest snowfall is February (1.93").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in December
Curtis, WA

Average snowfall days in December - Curtis, WA
  • Average snowfall days in December: 1.4 days

The month with the highest number of snowfall days is February (3.5 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
Curtis, WA

Average daylight in December / Average sunshine in December - Curtis, 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: 3h and 3min

The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is December (Average sunshine: 3h and 30min).

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Average sunshine days in December
Curtis, WA

Average sunshine days in December - Curtis, WA
  • Average sunshine days in December: 9.5 days

The months with the most sunshine days are July and August (20.8 days).
The month with the least sunshine days is February (7.6 days).

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Average UV index in December
Curtis, WA

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

The month with the highest UV index is 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
Curtis, WA

Average cloud cover in December - Curtis, WA
  • Average cloud cover in December: 65

The months with the most cloud cover are January, February and December (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 38).

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Average visibility in December
Curtis, WA

Average visibility in December - Curtis, WA
  • Average visibility in December: 4mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (4mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (4mi).

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Curtis, Washington, USA

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