Forest Grove
Oregon, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Forest Grove, OR

The first month of the winter, December, is still a chilly month in Forest Grove, Oregon, with temperature in the range of an average high of 45.7°F (7.6°C) and an average low of 33.6°F (0.9°C).

Temperature

In December, the average high-temperature slightly decreases, from a cool 52.2°F (11.2°C) in November, to a chilly 45.7°F (7.6°C). In December, in Forest Grove, the average low-temperature is 33.6°F (0.9°C).

Rainfall

The month with the most rainfall is December when the rain falls for 20 days and typically aggregates up to 8.2" (208.5mm) of precipitation.

Snowfall

January through March, November and December are months with snowfall in Forest Grove. During December, Forest Grove regularly aggregates up to 2.1" (53.3mm) of snow. In Forest Grove, during the entire year, snow aggregates up to 10.9" (276.9mm).

Daylight

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

What is the temperature in December in Forest Grove?

In December, in Forest Grove, Oregon, the average high-temperature is 45.7°F (7.6°C), and the average low-temperature is 33.6°F (0.9°C).

How much does it rain in Forest Grove in December?

In Forest Grove, Oregon, in December, during 20 rainfall days, 8.2" (208.5mm) of precipitation is typically accumulated.

What is the rainiest month in Forest Grove?

December is the month with the most rainfall. Rain falls for 20 days and accumulates 8.2" (208.5mm) of precipitation.

How much does it snow in Forest Grove in December?

During December, Forest Grove regularly aggregates up to 2.1" (53.3mm) of snow.

What is the month with the shortest days in Forest Grove?

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

How many hours of daylight does Forest Grove have in December?

The average length of the day in December is 8.8h.
Average temperature in December - Forest Grove, OR
  • Average high temperature in December: 45.6°F

The warmest month (with the highest average high temperature) is August (82.6°F).
The month with the lowest average high temperature is January (44.7°F).

  • Average low temperature in December: 33.6°F

The month with the highest average low temperature is July (51.8°F).
The coldest month (with the lowest average low temperature) is January (31.9°F).

Average rainfall in December - Forest Grove, OR
  • Average rainfall in December: 8.2"

The wettest month (with the highest rainfall) is December (8.2").
The driest month (with the lowest rainfall) is July (0.4").

Average rainfall days in December - Forest Grove, OR
  • Average rainfall days in December: 20 days

Months with the highest number of rainy days are January and December (20 days).
The month with the lowest number of rainy days is July (3 days).

Average snowfall in December - Forest Grove, OR
  • Average snowfall in December: 2.1"

The month with the highest snowfall is January (5.2").
Months with the lowest snowfall are April, May, June, July, August, September and October (0").

Average daylight in December - Forest Grove, 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).