December weather forecast
Enterprise, OR

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Broken fences in grass fields at the foot of the iconic Wallowa Mountain in Enterprise, Oregon
Broken fences in grass fields at the foot of the iconic Wallowa Mountain in Enterprise, Oregon

Weather in December

The first month of the winter, December, is also a subzero cold month in Enterprise, Oregon, with an average temperature fluctuating between 30.4°F (-0.9°C) and 19.2°F (-7.1°C).

Temperature

Temperature records mark December as the coldest month, with highs averaging 30.4°F (-0.9°C) and lows at 19.2°F (-7.1°C).

Humidity

The average relative humidity in December in Enterprise is 85%.

Rainfall

In Enterprise, Oregon, in December, during 9.9 rainfall days, 2.4" (61mm) of precipitation is typically accumulated. In Enterprise, during the entire year, the rain falls for 136 days and collects up to 24.45" (621mm) of precipitation.

Snowfall

January through June, September through December are months with snowfall in Enterprise. In Enterprise, in December, snow falls for 17.5 days, with typically accumulated 13.9" (353mm) of snow. Throughout the year, there are 89.9 snowfall days, and 68.82" (1748mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 8h and 48min of daylight.
On the first day of the month, sunrise is at 7:09 am and sunset at 4:07 pm. On the last day of December, in Enterprise, sunrise is at 7:28 am and sunset at 4:16 pm PST.

Sunshine

In December, the average sunshine is 5.2h.

UV index

The average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In December, the maximum UV index of 2 transforms into these recommendations:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
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Frequently asked questions

What time of the year is the coldest in Enterprise?

The coldest temperatures occur during December, when averages reach a peak of 30.4°F (-0.9°C) and a low of 19.2°F (-7.1°C).

How cold is it in Enterprise in December?

In December, in Enterprise, the average high-temperature is 30.4°F (-0.9°C), and the average low-temperature is 19.2°F (-7.1°C).

What is the average humidity in December in Enterprise?

In Enterprise, Oregon, the average relative humidity in December is 85%.

How much does it rain in Enterprise in December?

In December, the rain falls for 9.9 days. Throughout December, 2.4" (61mm) of precipitation is accumulated.

How much does it snow in Enterprise in December?

In Enterprise, during December, snow falls for 17.5 days and regularly aggregates up to 13.9" (353mm) of snow.

What is the month with the shortest days in Enterprise?

With an average of 8h and 48min of daylight, December has the shortest days of the year in Enterprise, Oregon.

How many hours of daylight does Enterprise have in December?

In December, the average day length is 8h and 47min.

When is the sunrise / sunset in December in Enterprise?

In December, on the first day of the month, sunrise is at 7:09 am and sunset at 4:07 pm. On the last day of the month, in Enterprise, Oregon, sunrise is at 7:28 am and sunset at 4:16 pm PST.

How long on average sun shines in December in Enterprise?

In Enterprise, Oregon, the average sunshine duration in December is 5.2h.

What is the UV index reading in December in Enterprise?

In December, the average daily maximum UV index in Enterprise is 2. A UV Index estimate of 2, and below, represents 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
Enterprise, OR

Average temperature in December - Enterprise, OR
  • Average high temperature in December: 30.4°F

The warmest months (with the highest average high temperature) are July and August (78.4°F).
The month with the lowest average high temperature is December (30.4°F).

  • Average low temperature in December: 19.2°F

The month with the highest average low temperature is August (50.9°F).
The coldest month (with the lowest average low temperature) is December (19.2°F).

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Average pressure in December
Enterprise, OR

Average pressure in December - Enterprise, OR
  • Average pressure in December: 30.19"Hg

The month with the highest atmospheric pressure is January (30.21"Hg).
The month with the lowest atmospheric pressure is August (29.92"Hg).

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Average wind speed in December
Enterprise, OR

Average wind speed in December - Enterprise, OR
  • Average wind speed in December: 6.2mph

The windiest month (with the highest average wind speed) is January (6.5mph).
The calmest month (with the lowest average wind speed) is August (4.1mph).

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Average humidity in December
Enterprise, OR

Average humidity in December - Enterprise, OR
  • Average humidity in December: 85%

The months with the highest relative humidity are January and February (86%).
The month with the lowest relative humidity is August (46%).

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Average rainfall in December
Enterprise, OR

Average rainfall in December - Enterprise, OR
  • Average rainfall in December: 2.4"

The wettest month (with the highest rainfall) is May (3.07").
The driest month (with the least rainfall) is July (0.83").

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Average rainfall days in December
Enterprise, OR

Average rainfall days in December - Enterprise, OR
  • Average rainfall days in December: 9.9 days

The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is August (5.8 days).

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Average snowfall in December
Enterprise, OR

Average snowfall in December - Enterprise, OR
  • Average snowfall in December: 13.9"

The month with the highest snowfall is February (15.98").
The months with the least snowfall are July and August (0").

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Average snowfall days in December
Enterprise, OR

Average snowfall days in December - Enterprise, OR
  • Average snowfall days in December: 17.5 days

The month with the highest number of snowfall days is December (17.5 days).
The months with the least snowfall days are July and August (0 days).

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Average daylight in December /
Average sunshine in December
Enterprise, OR

Average daylight in December / Average sunshine in December - Enterprise, OR
  • Average daylight in December: 8h and 5min

The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).

  • Average sunshine in December: 5h and 1min

The month with the most sunshine is August (Average sunshine: 12h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).

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Average sunshine days in December
Enterprise, OR

Average sunshine days in December - Enterprise, OR
  • Average sunshine days in December: 11.5 days

The month with the most sunshine days is August (21.6 days).
The month with the least sunshine days is March (8 days).

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Average UV index in December
Enterprise, OR

Average UV index in December - Enterprise, OR
  • 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 and February (UV index 1).

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Average cloud cover in December
Enterprise, OR

Average cloud cover in December - Enterprise, OR
  • Average cloud cover in December: 49

The month with the most cloud cover is February (Cloud cover 55).
The month with the least cloud cover is August (Cloud cover 11).

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Average visibility in December
Enterprise, OR

Average visibility in December - Enterprise, OR
  • Average visibility in December: 5mi

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

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Enterprise, Oregon, USA

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