December weather forecast
Rowena, OR

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Weather in December

December, the first month of the winter in Rowena, is also an icy month, with an average temperature fluctuating between 27.1°F (-2.7°C) and 37°F (2.8°C).

Temperature

In Rowena, the lowest average temperatures are observed in December, with a high of 37°F (2.8°C) and a low of 27.1°F (-2.7°C).

Humidity

January and December, with an average relative humidity of 85%, are the most humid months in Rowena.

Rainfall

In Rowena, during December, the rain falls for 15.5 days and regularly aggregates up to 2.87" (73mm) of precipitation. Throughout the year, there are 133.5 rainfall days, and 16.93" (430mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through March, November and December. In Rowena, during December, snow falls for 4.4 days and regularly aggregates up to 2.99" (76mm) of snow. Throughout the year, there are 14.3 snowfall days, and 11.06" (281mm) of snow is accumulated.

Daylight

With an average of 8h and 48min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 7:26 am and sunset at 4:22 pm. On the last day of the month, sunrise is at 7:45 am and sunset at 4:31 pm PST.

Sunshine

In Rowena, the average sunshine in December is 5h.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: A maximum high daily UV index of 2 during December translates into the following directions:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Updated: Aug 21, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the coldest month in Rowena?

Rowena experiences its lowest temperatures in December, with an average peak of 37°F (2.8°C) and a low of 27.1°F (-2.7°C).

How cold is it in December?

The high-temperature, in December, in Rowena, is 37°F (2.8°C), while the low-temperature averages to 27.1°F (-2.7°C). The average heat index (a.k.a. 'feels like', 'real feel'), which combines air temperature and relative humidity, in August is calculated to be 82.4°F (28°C).

What are the most humid months?

January and December, with an average relative humidity of 85%, are most humid months.

What is the average humidity in December?

In Rowena, the average relative humidity in December is 85%.

How much does it rain in December?

In December, the rain falls for 15.5 days. Throughout December, 2.87" (73mm) of precipitation is accumulated.

How many days does it snow in December?

In December, it is snowing for 4.4 days. Throughout December, 2.99" (76mm) of snow is accumulated.

What is the month with the shortest days?

With an average of 8h and 48min of daylight, December has the shortest days of the year.

How many hours of daylight does Rowena have in December?

The average day length in December is 8h and 46min.

When is the sunrise / sunset in December?

On the first day of December, sunrise is at 7:26 am and sunset at 4:22 pm. On the last day of the month, sunrise is at 7:45 am and sunset at 4:31 pm PST.

How long on average sun shines in December?

In December, the average sunshine duration is 5h.

What is the month with the lowest UV index?

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 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
Rowena, OR

Average temperature in December - Rowena, OR
  • Average high temperature in December: 37°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 (37°F).

  • Average low temperature in December: 27.1°F

The month with the highest average low temperature is August (55.8°F).
The coldest month (with the lowest average low temperature) is December (27.1°F).

Average pressure in December
Rowena, OR

Average pressure in December - Rowena, OR
  • Average pressure in December: 30.14"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is August (29.96"Hg).

Average wind speed in December
Rowena, OR

Average wind speed in December - Rowena, OR
  • Average wind speed in December: 4.8mph

The windiest month (with the highest average wind speed) is June (7.1mph).
The calmest months (with the lowest average wind speed) are January and December (4.8mph).

Average humidity in December
Rowena, OR

Average humidity in December - Rowena, OR
  • Average humidity in December: 85%

The months with the highest relative humidity are January and December (85%).
The months with the lowest relative humidity are July and August (51%).

Average rainfall in December
Rowena, OR

Average rainfall in December - Rowena, OR
  • Average rainfall in December: 2.87"

The wettest month (with the highest rainfall) is January (2.99").
The driest month (with the least rainfall) is July (0.16").

Average rainfall days in December
Rowena, OR

Average rainfall days in December - Rowena, OR
  • Average rainfall days in December: 15.5 days

The month with the highest number of rainy days is March (16.3 days).
The month with the least rainy days is August (3.2 days).

Average snowfall in December
Rowena, OR

Average snowfall in December - Rowena, OR
  • Average snowfall in December: 2.99"

The month with the highest snowfall is February (4.29").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in December
Rowena, OR

Average snowfall days in December - Rowena, OR
  • Average snowfall days in December: 4.4 days

The month with the highest number of snowfall days is December (4.4 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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

Average daylight in December / Average sunshine in December - Rowena, 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 0min

The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).

Average sunshine days in December
Rowena, OR

Average sunshine days in December - Rowena, OR
  • Average sunshine days in December: 12.1 days

The month with the most sunshine days is July (26.8 days).
The month with the least sunshine days is March (10.6 days).

Average UV index in December
Rowena, OR

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

Average cloud cover in December
Rowena, OR

Average cloud cover in December - Rowena, OR
  • Average cloud cover in December: 49

The month with the most cloud cover is January (Cloud cover 52).
The months with the least cloud cover are July and August (Cloud cover 10).

Average visibility in December
Rowena, OR

Average visibility in December - Rowena, 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).

Rowena, Oregon, USA

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