December weather forecast
Fossil, OR

Share

Weather in December

December, the first month of the winter in Fossil, is also a wintry month, with temperature in the range of an average high of 37.9°F (3.3°C) and an average low of 27.1°F (-2.7°C).

Temperature

The coldest temperatures occur during December, when averages reach a peak of 37.9°F (3.3°C) and a low of 27.1°F (-2.7°C).

Humidity

The average relative humidity in December is 78%.

Rainfall

In Fossil, in December, during 12.8 rainfall days, 1.65" (42mm) of precipitation is typically accumulated. In Fossil, during the entire year, the rain falls for 131.9 days and collects up to 13.54" (344mm) of precipitation.

Snowfall

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

Daylight

The month with the shortest days is December, with an average of 8h and 48min of daylight.
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.

Sunshine

In December, the average sunshine is 5.4h.

UV index

The months with the lowest UV index in Fossil are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: A maximum high daily UV index of 2 during December translates into the following directions:
Extended exposure to the sun should always be avoided by children, infants, and those with sensitive skin. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

Frequently asked questions

What are the coldest months?

Fossil's coldest temperatures are experienced in December, with average high temperatures of 37.9°F (3.3°C) and lows of 27.1°F (-2.7°C).

Is December cold?

The high-temperature, in December, in Fossil, is 37.9°F (3.3°C), while the low-temperature averages to 27.1°F (-2.7°C).

What is the average humidity in December?

In December, the average relative humidity is 78%.

How many days does it rain in December?

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

How many days does it snow in December?

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

What is the month with the shortest days?

The month with the shortest days is December, with an average of 8h and 48min of daylight.

What is the average length of the day in December?

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

When are sunrise and sunset in December?

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

How long on average sun shines in December?

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 intensity in December?

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 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).

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).

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).

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%).

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").

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).

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").

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).

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).

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).

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).

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).

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).

Fossil, Oregon, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location