December weather forecast
Bly, OR

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Weather in December

December, the first month of the winter in Bly, is also a wintry month, with an average temperature varying between 21.9°F (-5.6°C) and 34.3°F (1.3°C).

Temperature

December, with its high-temperature average of 34.3°F (1.3°C) and a low-temperature average of 21.9°F (-5.6°C), is the coldest month.

Humidity

The months with the highest humidity in Bly are January and December, with an average relative humidity of 81%.

Rainfall

December is the month with the most rainfall. Rain falls for 7.5 days and accumulates 2.28" (58mm) of precipitation.

Snowfall

January through June, September through December are months with snowfall. December is the month with the most snowfall. Snow falls for 14.8 days and accumulates 13.35" (339mm) 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 7:14 am and sunset at 4:32 pm. On the last day of the month, sunrise is at 7:33 am and sunset at 4:41 pm PST.

Sunshine

December has the least sunshine of the year, with an average of 5.4h of sunshine.

UV index

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Bly. A UV Index value of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for the average person.
Note: The maximum daily UV index of 2 in December interprets into the following recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.

Frequently asked questions

What month is the coldest?

Bly's coldest temperatures are experienced in December, with average high temperatures of 34.3°F (1.3°C) and lows of 21.9°F (-5.6°C).

How cold is December?

The high-temperature, in December, in Bly, is 34.3°F (1.3°C), while the low-temperature averages to 21.9°F (-5.6°C).

What is the most humid month?

January and December, with an average relative humidity of 81%, are most humid months.

What is the average humidity in December?

In Bly, the average relative humidity in December is 81%.

What is the rainiest month?

The month with the most rainfall is December, when the rain falls for 7.5 days and typically aggregates up to 2.28" (58mm) of precipitation.

How many days does it rain in December?

In Bly, in December, it is raining for 7.5 days, with typically 2.28" (58mm) of accumulated precipitation.

When does it snow the most?

The month with the most snowfall is December, when snow falls for 14.8 days and typically aggregates up to 13.35" (339mm) of snow.

How many days does it snow in December?

In Bly, during December, snow falls for 14.8 days and regularly aggregates up to 13.35" (339mm) of snow.

What is the month with the shortest days?

With an average of 9h and 6min of daylight, December has the shortest days of the year.

What is the average length of the day in December?

In December, the average day length is 9h and 8min.

When are sunrise and sunset in December in Bly?

In December, on the first day of the month, sunrise is at 7:14 am and sunset at 4:32 pm. On the last day of the month, sunrise is at 7:33 am and sunset at 4:41 pm PST.

What is the month with the least sunshine?

The month with the least sunshine is December, with an average of 5.4h of sunshine.

How many hours of sunshine does Bly have in December?

In December, the average sunshine duration is 5.4h.

What is the month with the lowest UV index?

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

How high is the UV index in December?

In December, the average daily maximum UV index is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from 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
Bly, OR

Average temperature in December - Bly, OR
  • Average high temperature in December: 34.3°F

The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is December (34.3°F).

  • Average low temperature in December: 21.9°F

The month with the highest average low temperature is July (51.4°F).
The coldest month (with the lowest average low temperature) is December (21.9°F).

Average pressure in December
Bly, OR

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

The month with the highest atmospheric pressure is January (30.21"Hg).
The months with the lowest atmospheric pressure are June and August (29.94"Hg).

Average wind speed in December
Bly, OR

Average wind speed in December - Bly, OR
  • Average wind speed in December: 7.4mph

The windiest month (with the highest average wind speed) is March (8.8mph).
The calmest month (with the lowest average wind speed) is August (6mph).

Average humidity in December
Bly, OR

Average humidity in December - Bly, OR
  • Average humidity in December: 81%

The months with the highest relative humidity are January and December (81%).
The month with the lowest relative humidity is August (36%).

Average rainfall in December
Bly, OR

Average rainfall in December - Bly, OR
  • Average rainfall in December: 2.28"

The wettest month (with the highest rainfall) is December (2.28").
The driest month (with the least rainfall) is July (0.2").

Average rainfall days in December
Bly, OR

Average rainfall days in December - Bly, OR
  • Average rainfall days in December: 7.5 days

The months with the highest number of rainy days are March, April and May (11.8 days).
The month with the least rainy days is August (3.3 days).

Average snowfall in December
Bly, OR

Average snowfall in December - Bly, OR
  • Average snowfall in December: 13.35"

The month with the highest snowfall is December (13.35").
The months with the least snowfall are July and August (0").

Average snowfall days in December
Bly, OR

Average snowfall days in December - Bly, OR
  • Average snowfall days in December: 14.8 days

The month with the highest number of snowfall days is December (14.8 days).
The months with the least snowfall days are July and August (0 days).

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

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

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in December: 5h and 2min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).

Average sunshine days in December
Bly, OR

Average sunshine days in December - Bly, OR
  • Average sunshine days in December: 13.5 days

The month with the most sunshine days is August (25 days).
The month with the least sunshine days is March (11.8 days).

Average UV index in December
Bly, OR

Average UV index in December - Bly, 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, November and December (UV index 2).

Average cloud cover in December
Bly, OR

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

The months with the most cloud cover are March and December (Cloud cover 45).
The months with the least cloud cover are July and August (Cloud cover 8).

Average visibility in December
Bly, OR

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

The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).

Bly, Oregon, USA

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