December weather forecast
Monument, OR

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Weather in December

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

Temperature

December proves to be the coldest month, recording an average maximum temperature of 33.4°F (0.8°C) and a minimum temperature of 19.6°F (-6.9°C).

Humidity

In December, the average relative humidity is 84%.

Rainfall

In Monument, in December, during 11.1 rainfall days, 2.24" (57mm) of precipitation is typically accumulated. Throughout the year, there are 127.7 rainfall days, and 17.09" (434mm) of precipitation is accumulated.

Snowfall

January through May, September through December are months with snowfall. In December, it is snowing for 14.5 days. Throughout December, 8.31" (211mm) of snow is accumulated. In Monument, 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 the month, sunrise is at 7:15 am and sunset at 4:18 pm. On the last day of December, sunrise is at 7:35 am and sunset at 4:26 pm PST.

Sunshine

The average sunshine in December is 5.3h.

UV index

January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for the average person.
Note: During December, 2 as the daily maximum UV index converts into the following advice:
In contrast to children, who must always be shielded from the sun, most people can tolerate up to an hour of sun exposure without any burns. Around midday, solar radiation is most harmful; hence, exposure should be limited. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.

Frequently asked questions

What time of the year is the coldest?

The coldest time of the year is December, with temperatures averaging a high of 33.4°F (0.8°C) and a low of 19.6°F (-6.9°C).

How cold is December?

The high-temperature, in December, in Monument, records 33.4°F (0.8°C), while the low-temperature is 19.6°F (-6.9°C). In August, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, is evaluated at 80.6°F (27°C).

What is the average humidity in December?

In December, the average relative humidity is 84%.

How many days does it rain in December?

In December, the rain falls for 11.1 days. Throughout December, 2.24" (57mm) of precipitation is accumulated.

How much does it snow in December?

In Monument, in December, snow falls for 14.5 days, with typically accumulated 8.31" (211mm) of snow.

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 Monument have in December?

The average day length in December is 8h and 52min.

What time are sunrise and sunset in December?

On the first day of December, sunrise is at 7:15 am and sunset at 4:18 pm. On the last day of the month, sunrise is at 7:35 am and sunset at 4:26 pm PST.

How many hours of sunshine does Monument have in December?

In Monument, the average sunshine duration in December is 5.3h.

What is the month with the lowest UV index?

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

How high is the UV index in December?

In Monument, the average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a low health risk 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
Monument, OR

Average temperature in December - Monument, 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
Monument, OR

Average pressure in December - Monument, 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
Monument, OR

Average wind speed in December - Monument, 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
Monument, OR

Average humidity in December - Monument, 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
Monument, OR

Average rainfall in December - Monument, 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
Monument, OR

Average rainfall days in December - Monument, 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
Monument, OR

Average snowfall in December - Monument, 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
Monument, OR

Average snowfall days in December - Monument, 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
Monument, OR

Average daylight in December / Average sunshine in December - Monument, 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
Monument, OR

Average sunshine days in December - Monument, 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
Monument, OR

Average UV index in December - Monument, 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
Monument, OR

Average cloud cover in December - Monument, 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
Monument, OR

Average visibility in December - Monument, 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).

Monument, Oregon, USA

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