December weather forecastCrater Lake, OR
December
Weather in December
December solidifies the onset of the winter season in Crater Lake with a further increase in snowfall to 91.1" (2314mm). Temperatures plummet, bringing the crisp, cold winter air. The short daylight hours and long, chilly nights define the month. Rainfall is at its peak, contributing to the frosty conditions and creating thick layers of ice around the lake. Despite the cold and snow, Crater Lake continues to captivate with its mesmerizing icy landscape.Temperature
Crater Lake's coldest temperatures are experienced in December, with average high temperatures of 33.6°F (0.9°C) and lows of 18.1°F (-7.7°C).Rainfall
December is the month with the most rainfall. Rain falls for 18.1 days and accumulates 11.57" (294mm) of precipitation.Snowfall
January through July, September through December are months with snowfall. The month with the most snowfall is December, when snow falls for 16.4 days and typically aggregates up to 91.1" (2314mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 6min of daylight.On the first day of December in Crater Lake, sunrise is at 7:20 am and sunset at 4:35 pm. On the last day of the month, sunrise is at 7:39 am and sunset at 4:44 pm PST.
Sunshine
The months with the least sunshine are November and December, with an average of 3h of sunshine.UV index
The month with the lowest UV index is December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: During December, 1 as the daily maximum UV index converts into the following advice:
Unlike children, who always need sun protection, most individuals can remain in the sun for up to an hour without getting burnt. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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
The 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").
The driest months (with the least 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 least 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 least 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 least snowfall days is August (0 days).
Average daylight in December /
Average sunshine in December
Crater Lake, OR
- Average daylight in December: 9h and 6min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 3h
The month with the most sunshine is July (Average sunshine: 12h).
The months with the least sunshine are November and December (Average sunshine: 3h).
Average UV index in December
Crater Lake, OR
- Average UV index in December: 1
The 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).
