December weather forecast
Union Creek, OR

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Weather in December

The first month of the winter, December, is still a cold month in Union Creek, Oregon, with an average temperature varying between 34.9°F (1.6°C) and 22.6°F (-5.2°C).

Temperature

December is the month when Union Creek sees the lowest average temperatures, with a high of 34.9°F (1.6°C) and a low of 22.6°F (-5.2°C).

Humidity

In Union Creek, the average relative humidity in December is 86%.

Rainfall

In December, the rain falls for 6.5 days. Throughout December, 5.2" (132mm) of precipitation is accumulated. In Union Creek, Oregon, during the entire year, the rain falls for 91.3 days and collects up to 32.95" (837mm) of precipitation.

Snowfall

Months with snowfall are January through June, September through December. December is the month with the most snowfall. Snow falls for 20.8 days and accumulates 39.72" (1009mm) of snow.

Daylight

December has the shortest days of the year, with an average of 9h and 6min of daylight.
On the first day of December, sunrise is at 7:21 am and sunset at 4:36 pm. On the last day of the month, sunrise is at 7:40 am and sunset at 4:45 pm PST.

Sunshine

December has the least sunshine of the year in Union Creek, with an average of 4.4h of sunshine.

UV index

In Union Creek, the average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: A maximum daily UV index of 2 during December morphs into the following directions:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
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Frequently asked questions

What is the coldest month in Union Creek?

Union Creek's temperature records reveal December as the coldest month, marked by average highs of 34.9°F (1.6°C) and lows of 22.6°F (-5.2°C).

How cold is December in Union Creek?

The average high-temperature, in December, in Union Creek, is 34.9°F (1.6°C), while the average low-temperature is 22.6°F (-5.2°C).

What is the average humidity in December in Union Creek?

In Union Creek, Oregon, the average relative humidity in December is 86%.

How many days does it rain in December in Union Creek?

In December, in Union Creek, Oregon, the rain falls for 6.5 days. Throughout December, 5.2" (132mm) of precipitation is accumulated.

When does it snow the most in Union Creek?

December is the month with the most snowfall in Union Creek. Snow falls for 20.8 days and accumulates 39.72" (1009mm) of snow.

How much does it snow in Union Creek in December?

In Union Creek, in December, during 20.8 snowfall days, 39.72" (1009mm) of snow is typically accumulated.

What is the month with the shortest days in Union Creek?

December has the shortest days of the year in Union Creek, Oregon, with an average of 9h and 6min of daylight.

What is the average length of the day in December in Union Creek?

The average day length in December in Union Creek is 9h and 5min.

When are sunrise and sunset in December in Union Creek?

On the first day of December in Union Creek, sunrise is at 7:21 am and sunset at 4:36 pm. On the last day of the month, sunrise is at 7:40 am and sunset at 4:45 pm PST.

What is the month with the least sunshine in Union Creek?

December has the least sunshine of the year, with an average of 4.4h of sunshine.

How long on average sun shines in December in Union Creek?

In December, the average sunshine duration is 4.4h.

What is the UV index reading in December in Union Creek?

In December, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability 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
Union Creek, OR

Average temperature in December - Union Creek, OR
  • Average high temperature in December: 34.9°F

The warmest month (with the highest average high temperature) is July (76.5°F).
The month with the lowest average high temperature is December (34.9°F).

  • Average low temperature in December: 22.6°F

The month with the highest average low temperature is August (46.8°F).
The coldest month (with the lowest average low temperature) is December (22.6°F).

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Average pressure in December
Union Creek, OR

Average pressure in December - Union Creek, OR
  • 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 (29.98"Hg).

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Average wind speed in December
Union Creek, OR

Average wind speed in December - Union Creek, OR
  • Average wind speed in December: 5.8mph

The windiest months (with the highest average wind speed) are January, February and March (6mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).

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Average humidity in December
Union Creek, OR

Average humidity in December - Union Creek, OR
  • Average humidity in December: 86%

The months with the highest relative humidity are January, February and March (87%).
The months with the lowest relative humidity are July and August (57%).

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Average rainfall in December
Union Creek, OR

Average rainfall in December - Union Creek, OR
  • Average rainfall in December: 5.2"

The wettest month (with the highest rainfall) is January (5.28").
The driest month (with the least rainfall) is July (0.39").

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Average rainfall days in December
Union Creek, OR

Average rainfall days in December - Union Creek, OR
  • Average rainfall days in December: 6.5 days

The month with the highest number of rainy days is May (13.3 days).
The month with the least rainy days is February (4.3 days).

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Average snowfall in December
Union Creek, OR

Average snowfall in December - Union Creek, OR
  • Average snowfall in December: 39.72"

The month with the highest snowfall is December (39.72").
The months with the least snowfall are July and August (0").

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Average snowfall days in December
Union Creek, OR

Average snowfall days in December - Union Creek, OR
  • Average snowfall days in December: 20.8 days

The month with the highest number of snowfall days is March (21.5 days).
The month with the least snowfall days is August (0 days).

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Average daylight in December /
Average sunshine in December
Union Creek, OR

Average daylight in December / Average sunshine in December - Union Creek, OR
  • Average daylight in December: 9h and 1min

The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in December: 4h and 2min

The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 4h and 24min).

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Average sunshine days in December
Union Creek, OR

Average sunshine days in December - Union Creek, OR
  • Average sunshine days in December: 10.7 days

The month with the most sunshine days is July (23.8 days).
The month with the least sunshine days is March (8.3 days).

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Average UV index in December
Union Creek, OR

Average UV index in December - Union Creek, OR
  • Average UV index in December: 2

The months with the highest UV index are June and July (UV index 5).
The month with the lowest UV index is February (UV index 1).

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Average cloud cover in December
Union Creek, OR

Average cloud cover in December - Union Creek, OR
  • Average cloud cover in December: 57

The month with the most cloud cover is March (Cloud cover 59).
The months with the least cloud cover are July and August (Cloud cover 13).

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Average visibility in December
Union Creek, OR

Average visibility in December - Union Creek, OR
  • Average visibility in December: 4mi

The months with the highest visibility are June, July, August and September (6mi).
The months with the lowest visibility are January, February, March, April, November and December (4mi).

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Union Creek, Oregon, USA

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