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

December weather forecast and climate
Sisters, OR

December, the first month of the winter, in Sisters, is also a wintry month, with average temperature ranging between max 40.5°F (4.7°C) and min 20.8°F (-6.2°C).

Temperature

The coldest month is December, with an average high-temperature of 40.5°F (4.7°C) and an average low-temperature of 20.8°F (-6.2°C).

Rainfall

The month with the most rainfall is December when the rain falls for 9 days and typically aggregates up to 2.3" (57.7mm) of precipitation.

Snowfall

January through April, October through December are months with snowfall.

Daylight

December has the shortest days of the year, with an average of 8.9h of daylight.

What is the coldest month in Sisters?

The coldest month in Sisters, Oregon, is December, with an average high-temperature of 40.5°F (4.7°C) and an average low-temperature of 20.8°F (-6.2°C).

What is the temperature in December in Sisters?

The average high-temperature, in December, in Sisters, Oregon, is 40.5°F (4.7°C), while the average low-temperature is 20.8°F (-6.2°C).

How many days does it rain in December in Sisters?

In Sisters, Oregon, in December, during 9 rainfall days, 2.3" (57.7mm) of precipitation is typically accumulated.

What is the wettest month in Sisters?

The month with the most rainfall in Sisters is December when the rain falls for 9 days and typically aggregates up to 2.3" (57.7mm) of precipitation.

How much does it snow in Sisters in December?

Throughout December, in Sisters, Oregon, 7.9" (200.7mm) of snow is accumulated.

What is the month with the shortest days in Sisters?

December has the shortest days of the year in Sisters, with an average of 8.9h of daylight.

How many hours of daylight does Sisters have in December?

The average length of the day in December in Sisters, Oregon, is 8.9h.
Average temperature in December - Sisters, OR
  • Average high temperature in December: 40.5°F

The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is December (40.5°F).

  • Average low temperature in December: 20.9°F

The month with the highest average low temperature is July (42.4°F).
The coldest month (with the lowest average low temperature) is December (20.9°F).

Average rainfall in December - Sisters, OR
  • Average rainfall in December: 2.3"

The wettest month (with the highest rainfall) is December (2.3").
Driest months (with the lowest rainfall) are July, August and September (0.4").

Average rainfall days in December - Sisters, OR
  • Average rainfall days in December: 9 days

The month with the highest number of rainy days is November (10 days).
The month with the lowest number of rainy days is July (2 days).

Average snowfall in December - Sisters, OR
  • Average snowfall in December: 7.9"

The month with the highest snowfall is January (8.3").
Months with the lowest snowfall are May, June, July, August and September (0").

Average daylight in December - Sisters, OR
  • Average daylight in December: 8.9h

The month with the longest days is June (Average daylight: 15.5h).
The month with shortest days is December (Average daylight: 8.9h).