Salem
Oregon, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Salem, OR

An evening shot of the leafy town of Salem in Oregon, with a clear dusk sky
An evening shot of the leafy town of Salem in Oregon, with a clear dusk sky
December, the first month of the winter, in Salem, is still a chilly month, with average temperature fluctuating between 34°F (1.1°C) and 46.2°F (7.9°C).

Temperature

The coldest month is December, with an average high-temperature of 46.2°F (7.9°C) and an average low-temperature of 34°F (1.1°C).

Rainfall

The month with the most rainfall is December when the rain falls for 18.2 days and typically aggregates up to 6.9" (174.2mm) of precipitation.

Snowfall

Months with snowfall are January, February, November and December. In December, it is snowing for 0.7 days. Throughout December, 1.1" (27.9mm) of snow is accumulated. In Salem, during the entire year, snow falls for 1.9 days, and aggregates up to 3.5" (88.8mm) of snow.

Daylight

The month with the shortest days in Salem is December, with an average of 8.8h of daylight.

Sunshine

December has the least sunshine of the year in Salem, with an average of 2h of sunshine.

UV index

Months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a minimal health vulnerability from the exposure to the Sun's UV radiation for ordinary individuals.
Note: In December, the average maximum UV index of 1 translate into the following recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the coldest month in Salem?

December is the coldest month, with an average high-temperature of 46.2°F (7.9°C) and an average low-temperature of 34°F (1.1°C).

What is the temperature in December in Salem?

In December, in Salem, Oregon, the average high-temperature is 46.2°F (7.9°C), and the average low-temperature is 34°F (1.1°C).

How many days does it rain in December in Salem?

In December, the rain falls for 18.2 days. Throughout December, 6.9" (174.2mm) of precipitation is accumulated.

What is the wettest month in Salem?

The month with the most rainfall in Salem is December when the rain falls for 18.2 days and typically aggregates up to 6.9" (174.2mm) of precipitation.

How much does it snow in Salem in December?

In Salem, Oregon, in December, snow falls for 0.7 days, with typically accumulated 1.1" (27.9mm) of snow.

What is the month with the shortest days in Salem?

December has the shortest days of the year, with an average of 8.8h of daylight.

How many hours of daylight does Salem have in December?

In Salem, the average length of the day in December is 8.8h.

What is the month with the least sunshine in Salem?

December has the least sunshine of the year in Salem, with an average of 2h of sunshine.

How long on average sun shines in December in Salem?

In Salem, Oregon, the average sunshine in December is 2h.

What is the month with the lowest UV index in Salem?

Months with the lowest UV index in Salem are January and December, with an average maximum UV index of 1.

What is the UV index reading in December in Salem?

The average daily maximum UV index in December is 1. A UV Index reading of 2, and below, represents a minimal hazard to health from unprotected exposure to the UV radiation.
Average temperature in December - Salem, OR
  • Average high temperature in December: 46.2°F

The warmest month (with the highest average high temperature) is August (82.4°F).
The month with the lowest average high temperature is December (46.2°F).

  • Average low temperature in December: 34°F

The month with the highest average low temperature is July (53.1°F).
The coldest month (with the lowest average low temperature) is December (34°F).

Average rainfall in December - Salem, OR
  • Average rainfall in December: 6.9"

The wettest month (with the highest rainfall) is December (6.9").
The driest month (with the lowest rainfall) is August (0.4").

Average rainfall days in December - Salem, OR
  • Average rainfall days in December: 18.2 days

The month with the highest number of rainy days is December (18.2 days).
The month with the lowest number of rainy days is July (2.9 days).

Average snowfall in December - Salem, OR
  • Average snowfall in December: 1.1"

The month with the highest snowfall is February (1.7").
Months with the lowest snowfall are March, April, May, June, July, August, September and October (0").

Average snowfall days in December - Salem, OR
  • Average snowfall days in December: 0.7 days

Months with the highest number of snowfall days are February and December (0.7 days).
Months with the lowest number of snowfall days are March, April, May, June, July, August, September and October (0 days).

Average daylight in December / Average sunshine in December - Salem, OR
  • Average daylight in December: 8.8h

The month with the longest days is June (Average daylight: 15.6h).
The month with shortest days is December (Average daylight: 8.8h).

  • Average sunshine in December: 2h

The month with most sunshine is July (Average sunshine: 11h).
The month with least sunshine is December (Average sunshine: 2h).

Average UV index in December - Salem, OR
  • Average UV index in December: 1

The month with the highest UV index is July (UV index 8).
Months with the lowest UV index are January and December (UV index 1).