December weather forecast
Dayville, OR

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Weather in December

The first month of the winter, December, is also an icy month in Dayville, Oregon, with an average temperature fluctuating between 33.4°F (0.8°C) and 19.6°F (-6.9°C).

Temperature

Temperature readings reach their annual highs in December, averaging 33.4°F (0.8°C) and a minimum average of 19.6°F (-6.9°C).

Humidity

The average relative humidity in December is 84%.

Rainfall

In Dayville, during December, the rain falls for 11.1 days and regularly aggregates up to 2.24" (57mm) of precipitation. In Dayville, during the entire year, the rain falls for 127.7 days and collects up to 17.09" (434mm) of precipitation.

Snowfall

Months with snowfall are January through May, September through December. In December, it is snowing for 14.5 days. Throughout December, 8.31" (211mm) of snow is accumulated. In Dayville, during the entire year, snow falls for 62.5 days and aggregates up to 39.17" (995mm) of snow.

Daylight

The month with the shortest days is December, with an average of 8h and 54min of daylight.
On the first day of December, sunrise is at 7:15 am and sunset at 4:19 pm. On the last day of the month, sunrise is at 7:34 am and sunset at 4:28 pm PST.

Sunshine

In Dayville, the average sunshine in December is 5.3h.

UV index

The months with the lowest UV index in Dayville are January through March, October through December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: The maximum daily UV index of 2 during December translates into the following directions:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Updated: Jun 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the coldest months?

December is the coldest month, exhibiting average temperatures of 33.4°F (0.8°C) at the peak and 19.6°F (-6.9°C) at the base.

How cold is December?

The average high-temperature, in December, in Dayville, is 33.4°F (0.8°C), while the average low-temperature is 19.6°F (-6.9°C). In August, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which factors the actual air temperature with the relative humidity, is calculated to be 80.6°F (27°C).

What is the average humidity in December?

The average relative humidity in December is 84%.

How much does it rain in December?

In Dayville, in December, it is raining for 11.1 days, with typically 2.24" (57mm) of accumulated precipitation.

How many days does it snow in December?

In December, it is snowing for 14.5 days. Throughout December, 8.31" (211mm) of snow is accumulated.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 8h and 54min of daylight.

How many hours of daylight does Dayville have in December?

The average day length in December is 8h and 54min.

When is the sunrise / sunset in December?

On the first day of December, sunrise is at 7:15 am and sunset at 4:19 pm. On the last day of the month, sunrise is at 7:34 am and sunset at 4:28 pm PST.

How long on average sun shines in December?

In December, the average sunshine duration is 5.3h.

What are the months with the lowest UV index in Dayville?

January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index.

What is the UV index reading in December?

In December, the average daily maximum UV index is 2. A UV Index value of 2, and less, symbolizes 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
Dayville, OR

Average temperature in December - Dayville, OR
  • Average high temperature in December: 33.4°F

The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is December (33.4°F).

  • Average low temperature in December: 19.6°F

The month with the highest average low temperature is August (49.6°F).
The coldest month (with the lowest average low temperature) is December (19.6°F).

Average pressure in December
Dayville, OR

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

The month with the highest atmospheric pressure is January (30.22"Hg).
The month with the lowest atmospheric pressure is August (29.93"Hg).

Average wind speed in December
Dayville, OR

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

The windiest month (with the highest average wind speed) is April (6.2mph).
The calmest months (with the lowest average wind speed) are August and September (5mph).

Average humidity in December
Dayville, OR

Average humidity in December - Dayville, OR
  • Average humidity in December: 84%

The month with the highest relative humidity is February (85%).
The month with the lowest relative humidity is August (42%).

Average rainfall in December
Dayville, OR

Average rainfall in December - Dayville, OR
  • Average rainfall in December: 2.24"

The wettest month (with the highest rainfall) is February (2.28").
The driest month (with the least rainfall) is July (0.24").

Average rainfall days in December
Dayville, OR

Average rainfall days in December - Dayville, OR
  • Average rainfall days in December: 11.1 days

The month with the highest number of rainy days is March (17.3 days).
The month with the least rainy days is August (3.3 days).

Average snowfall in December
Dayville, OR

Average snowfall in December - Dayville, OR
  • Average snowfall in December: 8.31"

The month with the highest snowfall is February (10.31").
The months with the least snowfall are June, July and August (0").

Average snowfall days in December
Dayville, OR

Average snowfall days in December - Dayville, OR
  • Average snowfall days in December: 14.5 days

The month with the highest number of snowfall days is December (14.5 days).
The months with the least snowfall days are June, July and August (0 days).

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

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

The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).

  • Average sunshine in December: 5h and 2min

The month with the most sunshine is August (Average sunshine: 12h and 6min).
The months with the least sunshine are January and February (Average sunshine: 5h and 12min).

Average sunshine days in December
Dayville, OR

Average sunshine days in December - Dayville, OR
  • Average sunshine days in December: 11.4 days

The month with the most sunshine days is July (24.9 days).
The month with the least sunshine days is February (9 days).

Average UV index in December
Dayville, OR

Average UV index in December - Dayville, 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, February, March, October, November and December (UV index 2).

Average cloud cover in December
Dayville, OR

Average cloud cover in December - Dayville, OR
  • Average cloud cover in December: 47

The month with the most cloud cover is February (Cloud cover 49).
The months with the least cloud cover are July and August (Cloud cover 9).

Average visibility in December
Dayville, OR

Average visibility in December - Dayville, OR
  • Average visibility in December: 4mi

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

Dayville, Oregon, USA

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