December weather forecast
Bly, OR

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Weather in December

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

Temperature

In Bly, Oregon, December is the month with the lowest recorded average temperatures, measuring a high of 34.3°F (1.3°C) and a low of 21.9°F (-5.6°C).

Humidity

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

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 in Bly. Snow falls for 14.8 days and accumulates 13.35" (339mm) of snow.

Daylight

With an average of 9h and 6min of daylight, December has the shortest days of the year in Bly.
On the first day of December in Bly, 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

With an average of 5.4h of sunshine, December has the least sunshine of the year in Bly, Oregon.

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, Oregon. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: In December, a daily UV index of 2 turns into the following recommendations:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
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Frequently asked questions

What is the coldest time of year in Bly?

December is the month when Bly, Oregon, sees the average lowest temperatures, with a high of 34.3°F (1.3°C) and a low of 21.9°F (-5.6°C).

How cold is December in Bly?

During December, Bly experiences an average high-temperature of 34.3°F (1.3°C) and a low-temperature of 21.9°F (-5.6°C).

What are the most humid months in Bly?

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

What is the average humidity in December in Bly?

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

What is the rainiest month in Bly?

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

How much does it rain in Bly in December?

In Bly, during December, the rain falls for 7.5 days and regularly aggregates up to 2.28" (58mm) of precipitation.

When does it snow the most in Bly?

December is the month with the most snowfall. Snow falls for 14.8 days and accumulates 13.35" (339mm) of snow.

How much does it snow in Bly in December?

In Bly, Oregon, in December, snow falls for 14.8 days, with typically accumulated 13.35" (339mm) of snow.

What is the month with the shortest days in Bly?

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

How many hours of daylight does Bly have in December?

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

When is the sunrise / sunset in December in Bly?

On the first day of December in Bly, 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 in Bly?

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

How many hours of sunshine does Bly have in December?

In Bly, Oregon, the average sunshine duration in December is 5.4h.

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

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

What is the UV index reading in December in Bly?

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

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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).

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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).

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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%).

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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").

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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).

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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").

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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).

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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).

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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).

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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).

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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).

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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).

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Bly, Oregon, USA

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