December weather forecast
Fossil, OR

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Weather in December

The first month of the winter, December, is also a wintry month in Fossil, Oregon, with an average temperature ranging between max 37.9°F (3.3°C) and min 27.1°F (-2.7°C).

Temperature

December, with its high-temperature average of 37.9°F (3.3°C) and a low-temperature average of 27.1°F (-2.7°C), is the coldest month.

Humidity

In Fossil, the average relative humidity in December is 78%.

Rainfall

In Fossil, Oregon, in December, during 12.8 rainfall days, 1.65" (42mm) of precipitation is typically accumulated. Throughout the year, in Fossil, Oregon, there are 131.9 rainfall days, and 13.54" (344mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Fossil are January through May, September through December. In Fossil, in December, snow falls for 9.2 days, with typically accumulated 3.66" (93mm) of snow. In Fossil, during the entire year, snow falls for 31.3 days and aggregates up to 18.54" (471mm) of snow.

Daylight

December has the shortest days of the year, with an average of 8h and 48min of daylight.
On the first day of December in Fossil, sunrise is at 7:19 am and sunset at 4:20 pm. On the last day of the month, sunrise is at 7:38 am and sunset at 4:29 pm PST.

Sunshine

The average sunshine in December in Fossil, Oregon, is 5.4h.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum UV index, 2 during December, leads to the following recommendations:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
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Frequently asked questions

What is the coldest month in Fossil?

December is the coldest month, exhibiting average temperatures of 37.9°F (3.3°C) at the peak and 27.1°F (-2.7°C) at the base.

Is it cold in Fossil during December?

In Fossil, 37.9°F (3.3°C) is the average high-temperature and 27.1°F (-2.7°C) is the average low-temperature during December.

What is the average humidity in December in Fossil?

In December, the average relative humidity in Fossil, Oregon, is 78%.

How many days does it rain in December in Fossil?

In Fossil, during December, the rain falls for 12.8 days and regularly aggregates up to 1.65" (42mm) of precipitation.

How much does it snow in Fossil in December?

In Fossil, Oregon, in December, during 9.2 snowfall days, 3.66" (93mm) of snow is typically accumulated.

What is the month with the shortest days in Fossil?

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

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

In December, the average day length in Fossil is 8h and 50min.

When is the sunrise / sunset in December in Fossil?

On the first day of December, sunrise is at 7:19 am and sunset at 4:20 pm. On the last day of the month, sunrise is at 7:38 am and sunset at 4:29 pm PST.

How long on average sun shines in December in Fossil?

The average sunshine duration in December is 5.4h.

When is the lowest UV index in Fossil?

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

What is the UV index reading in December in Fossil?

In December, the average daily maximum UV index in Fossil, Oregon, is 2. A UV Index estimate of 2, and below, represents a low health threat 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
Fossil, OR

Average temperature in December - Fossil, OR
  • Average high temperature in December: 37.9°F

The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is December (37.9°F).

  • Average low temperature in December: 27.1°F

The month with the highest average low temperature is August (60.8°F).
The coldest month (with the lowest average low temperature) is December (27.1°F).

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Average pressure in December
Fossil, OR

Average pressure in December - Fossil, OR
  • Average pressure in December: 30.17"Hg

The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is August (29.92"Hg).

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Average wind speed in December
Fossil, OR

Average wind speed in December - Fossil, OR
  • Average wind speed in December: 8mph

The windiest month (with the highest average wind speed) is April (9.4mph).
The calmest month (with the lowest average wind speed) is September (7.2mph).

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Average humidity in December
Fossil, OR

Average humidity in December - Fossil, OR
  • Average humidity in December: 78%

The month with the highest relative humidity is January (79%).
The months with the lowest relative humidity are July and August (39%).

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Average rainfall in December
Fossil, OR

Average rainfall in December - Fossil, OR
  • Average rainfall in December: 1.65"

The wettest month (with the highest rainfall) is February (1.81").
The driest month (with the least rainfall) is July (0.24").

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Average rainfall days in December
Fossil, OR

Average rainfall days in December - Fossil, OR
  • Average rainfall days in December: 12.8 days

The month with the highest number of rainy days is March (17 days).
The month with the least rainy days is August (4.1 days).

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Average snowfall in December
Fossil, OR

Average snowfall in December - Fossil, OR
  • Average snowfall in December: 3.66"

The month with the highest snowfall is February (6.61").
The months with the least snowfall are June, July and August (0").

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Average snowfall days in December
Fossil, OR

Average snowfall days in December - Fossil, OR
  • Average snowfall days in December: 9.2 days

The month with the highest number of snowfall days is December (9.2 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
Fossil, OR

Average daylight in December / Average sunshine in December - Fossil, 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 2min

The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The months with the least sunshine are January and February (Average sunshine: 5h and 18min).

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Average sunshine days in December
Fossil, OR

Average sunshine days in December - Fossil, OR
  • Average sunshine days in December: 12.8 days

The month with the most sunshine days is July (24.4 days).
The month with the least sunshine days is March (9.5 days).

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Average UV index in December
Fossil, OR

Average UV index in December - Fossil, OR
  • Average UV index in December: 2

The month with the highest UV index is July (UV index 7).
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
Fossil, OR

Average cloud cover in December - Fossil, OR
  • Average cloud cover in December: 45

The months with the most cloud cover are January and February (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 9).

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Average visibility in December
Fossil, OR

Average visibility in December - Fossil, OR
  • Average visibility in December: 6mi

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

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Fossil, Oregon, USA

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