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

December weather forecast and climate
Umatilla, OR

December, the first month of the winter, in Umatilla, is also a wintry month, with temperature in the range of an average low of 28.4°F (-2°C) and an average high of 42.1°F (5.6°C).

Temperature

In December, the average high-temperature marginally drops, from a fresh 50.9°F (10.5°C) in November, to a cold 42.1°F (5.6°C). In December, the average low-temperature is 28.4°F (-2°C).

Rainfall

December is the month with the most rainfall in Umatilla. Rain falls for 8 days and accumulates 1.1" (27.7mm) of precipitation.

Snowfall

Months with snowfall are January through March, November and December.

Daylight

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

What is the rainiest month in Umatilla?

The month with the most rainfall in Umatilla 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?

The month with the shortest days is December, with an average of 8.7h of daylight.

How many hours of daylight does Umatilla have in December?

In Umatilla, the average length of the day in December is 8.7h.
Average temperature in December - Umatilla, OR
  • Average high temperature in December: 42.1°F

The warmest month (with the highest average high temperature) is July (92.6°F).
The month with the lowest average high temperature is January (40°F).

  • Average low temperature in December: 28.4°F

The month with the highest average low temperature is July (59.4°F).
The coldest month (with the lowest average low temperature) is January (25.2°F).

Average rainfall in December - Umatilla, OR
  • Average rainfall in December: 1.1"

Wettest months (with the highest rainfall) are January, November and December (1.1").
The driest month (with the lowest rainfall) is July (0.2").

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: 1.1"

The month with the highest snowfall is January (3.9").
Months with the lowest snowfall are April, May, June, July, August, September and October (0").

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).