Crater Lake
Oregon, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Crater Lake, OR

A beautiful landscape of the Crater Lake in Oregon, viewed from atop the Watchman
A beautiful landscape of the Crater Lake in Oregon, viewed from atop the Watchman's Peak, under a cloudy sky
December brings severe cold during the winter in Crater Lake with mostly cloudy and dark skies. The wind chill exacerbates the cold as the average low temperature is at 19°F (-7.2°C), well below the freezing mark. Many nights drop below 0°F (-17.8°C), and most of the days are rarely a few degrees above freezing.
The majority of roads and trails remain closed, with only the west and south entrances to the lake kept open. The massive 90" (2286mm) of snow brings snowstorms along with it, and the conditions become harsher with the 11.1" (281.9mm) of rainfall. December has the shortest days with only 3 hours of sunlight.

What is the coldest month in Crater Lake?

The coldest month in Crater Lake is December, with an average high-temperature of 33.6°F (0.9°C) and an average low-temperature of 18.1°F (-7.7°C).

What is the temperature in December in Crater Lake?

In Crater Lake, Oregon, in December, the average high-temperature is 33.6°F (0.9°C), and the average low-temperature is 18.1°F (-7.7°C).

How much does it rain in Crater Lake in December?

In December, in Crater Lake, Oregon, the rain falls for 18.1 days. Throughout December, 11.6" (293.6mm) of precipitation is accumulated.

What is the rainiest month in Crater Lake?

December is the month with the most rainfall. Rain falls for 18.1 days and accumulates 11.6" (293.6mm) of precipitation.

How much does it snow in Crater Lake in December?

In Crater Lake, Oregon, during December, snow falls for 16.4 days and regularly aggregates up to 91.1" (2313.9mm) of snow.

What is the snowiest month in Crater Lake?

December is the month with the most snowfall in Crater Lake. Snow falls for 16.4 days and accumulates 91.1" (2313.9mm) of snow.

What is the month with the shortest days in Crater Lake?

December has the shortest days of the year in Crater Lake, Oregon, with an average of 9.1h of daylight.

How many hours of daylight does Crater Lake have in December?

In Crater Lake, the average length of the day in December is 9.1h.

What is the month with the least sunshine in Crater Lake?

Months with the least sunshine are November and December, with an average of 3h of sunshine.

How long on average sun shines in December in Crater Lake?

In Crater Lake, the average sunshine in December is 3h.

What is the month with the lowest UV index in Crater Lake?

December is the month with the lowest UV index in Crater Lake, with an average maximum UV index of 1.

What is the UV index reading in December in Crater Lake?

The average daily maximum UV index in December in Crater Lake is 1. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from the exposure to the Sun's UV rays.
Average temperature in December - Crater Lake, OR
  • Average high temperature in December: 33.6°F

The warmest month (with the highest average high temperature) is August (69.7°F).
The month with the lowest average high temperature is December (33.6°F).

  • Average low temperature in December: 18.1°F

Months with the highest average low temperature are July and August (40.5°F).
The coldest month (with the lowest average low temperature) is February (17.8°F).

Average rainfall in December - Crater Lake, OR
  • Average rainfall in December: 11.6"

The wettest month (with the highest rainfall) is December (11.6").
Driest months (with the lowest rainfall) are July and August (1").

Average rainfall days in December - Crater Lake, OR
  • Average rainfall days in December: 18.1 days

The month with the highest number of rainy days is March (18.2 days).
The month with the lowest number of rainy days is July (3.9 days).

Average snowfall in December - Crater Lake, OR
  • Average snowfall in December: 91.1"

The month with the highest snowfall is December (91.1").
The month with the lowest snowfall is August (0").

Average snowfall days in December - Crater Lake, OR
  • Average snowfall days in December: 16.4 days

The month with the highest number of snowfall days is December (16.4 days).
The month with the lowest number of snowfall days is August (0 days).

Average daylight in December / Average sunshine in December - Crater Lake, OR
  • Average daylight in December: 9.1h

The month with the longest days is June (Average daylight: 15.3h).
The month with shortest days is December (Average daylight: 9.1h).

  • Average sunshine in December: 3h

The month with most sunshine is July (Average sunshine: 12h).
Months with least sunshine are November and December (Average sunshine: 3).

Average UV index in December - Crater Lake, OR
  • Average UV index in December: 1

Months with the highest UV index are June and July (UV index 9).
The month with the lowest UV index is December (UV index 1).