December weather forecast and climate
Umatilla, OR

The first month of the winter, December, is still a cold month in Umatilla, Oregon, with average temperature fluctuating between 42.1°F (5.6°C) and 28.4°F (-2°C).

Temperature

In Umatilla, the average high-temperature is 42.1°F (5.6°C), and the average low-temperature is 28.4°F (-2°C).

Rainfall

The month with the most rainfall in Umatilla, Oregon, is December when the rain falls for 8 days and typically aggregates up to 1.1" (27.7mm) of precipitation.

Snowfall

January through March, November and December are months with snowfall in Umatilla, Oregon.

Daylight

December has the shortest days of the year, with an average of 8.7h of daylight.

What is the temperature in December in Umatilla?

In December, in Umatilla, the average high-temperature is 42.1°F (5.6°C), and the average low-temperature is 28.4°F (-2°C).

How many days does it rain in December in Umatilla?

In December, in Umatilla, Oregon, the rain falls for 8 days. Throughout December, 1.1" (27.7mm) of precipitation is accumulated.

What is the wettest month in Umatilla?

The month with the most rainfall in Umatilla, Oregon, is December when the rain falls for 8 days and typically aggregates up to 1.1" (27.7mm) of precipitation.

How much does it snow in Umatilla in December?

During December, Umatilla regularly aggregates up to 1.1" (27.9mm) of snow.

What is the month with the shortest days in Umatilla?

December has the shortest days of the year in Umatilla, with an average of 8.7h of daylight.

What is the average length of the day in December in Umatilla?

In December, the average length of the day in Umatilla, Oregon, is 8.7h.
Average temperature in December - Umatilla, OR
  • Average high temperature in December: 5.6°C

The warmest month (with the highest average high temperature) is July (33.7°C).
The month with the lowest average high temperature is January (4.4°C).

  • Average low temperature in December: -2°C

The month with the highest average low temperature is July (15.2°C).
The coldest month (with the lowest average low temperature) is January (-3.8°C).

Average rainfall in December - Umatilla, OR
  • Average rainfall in December: 27.7mm

The wettest month (with the highest rainfall) is December (27.7mm).
The driest month (with the lowest rainfall) is July (4.1mm).

Average rainfall days in December - Umatilla, OR
  • Average rainfall days in December: 8 days

Months with the highest number of rainy days are January and December (8 days).
The month with the lowest number of rainy days is July (1 days).

Average snowfall in December - Umatilla, OR
  • Average snowfall in December: 27.9mm

The month with the highest snowfall is January (99.1mm).
Months with the lowest snowfall are April, May, June, July, August, September and October (0mm).

Average daylight in December - Umatilla, OR
  • Average daylight in December: 8.7h

The month with the longest days is June (Average daylight: 15.7h).
The month with shortest days is December (Average daylight: 8.7h).

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