Crater Lake
Oregon, USA
Long-term weather forecast
Long-term weather forecast
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December weather forecast and Climate
Crater Lake, OR

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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.
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  • The 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).

  • The 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).

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  • The 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").

  • The 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).

  • The 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").

  • The 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).

  • The average daylight in December: 9h

Months with the longest days are May, June and July (Average daylight: 15h).
Months with shortest days are January and December (Average daylight: 9h).

  • The 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).

  • The 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).

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