Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
December is the month that records the lowest temperatures, with averages ranging from a high of 35.4°F (1.9°C) to a low of 23.5°F (-4.7°C).Humidity
In December, the average relative humidity is 86%.Rainfall
In December, the rain falls for 8.1 days. Throughout December, 5.47" (139mm) of precipitation is accumulated. In Diamond Lake, during the entire year, the rain falls for 105.2 days and collects up to 35.83" (910mm) of precipitation.Snowfall
January through June, September through December are months with snowfall. The months with the most snowfall are January and December, with an average 39.21" (996mm) of accumulated snow.Daylight
With an average of 9h and 6min of daylight, December has the shortest days of the year.On the first day of December in Diamond Lake, sunrise is at 7:21 am and sunset at 4:34 pm. On the last day of the month, sunrise is at 7:40 am and sunset at 4:43 pm PST.
Sunshine
January and December, with an average of 4.5h of sunshine, are months with the least sunshine.UV index
The average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: During December, 2 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 Sun's radiation is especially intense around midday; try to stay in shade during this period. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the coldest?
How cold is December?
What is the average humidity in December?
How many days does it rain in December?
When does it snow the most in Diamond Lake?
How many days does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December in Diamond Lake?
When are sunrise and sunset in December?
What are the months with the least sunshine in Diamond Lake?
How long on average sun shines in December?
What is the UV index intensity in December?
Average temperature in December
Diamond Lake, OR
- Average high temperature in December: 35.4°F
The warmest months (with the highest average high temperature) are July and August (76.5°F).
The month with the lowest average high temperature is December (35.4°F).
- Average low temperature in December: 23.5°F
The month with the highest average low temperature is August (46.4°F).
The coldest month (with the lowest average low temperature) is December (23.5°F).
Average pressure in December
Diamond Lake, OR
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is August (29.98"Hg).
Average wind speed in December
Diamond Lake, OR
- Average wind speed in December: 5.7mph
The windiest month (with the highest average wind speed) is January (6mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in December
Diamond Lake, OR
- Average humidity in December: 86%
The months with the highest relative humidity are February and March (88%).
The months with the lowest relative humidity are July and August (59%).
Average rainfall in December
Diamond Lake, OR
- Average rainfall in December: 5.47"
The wettest month (with the highest rainfall) is January (5.55").
The driest month (with the least rainfall) is July (0.39").
Average rainfall days in December
Diamond Lake, OR
- Average rainfall days in December: 8.1 days
The month with the highest number of rainy days is May (14.3 days).
The month with the least rainy days is July (4.6 days).
Average snowfall in December
Diamond Lake, OR
- Average snowfall in December: 39.21"
The months with the highest snowfall are January and December (39.21").
The months with the least snowfall are July and August (0").
Average snowfall days in December
Diamond Lake, OR
- Average snowfall days in December: 20.4 days
The month with the highest number of snowfall days is March (21.8 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in December /
Average sunshine in December
Diamond Lake, OR
- Average daylight in December: 9h and 1min
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: 4h and 3min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The months with the least sunshine are January and December (Average sunshine: 4h and 30min).
Average sunshine days in December
Diamond Lake, OR
- Average sunshine days in December: 10.5 days
The month with the most sunshine days is July (23.6 days).
The month with the least sunshine days is March (7.4 days).
Average UV index in December
Diamond Lake, OR
- Average UV index in December: 2
The month with the highest UV index is July (UV index 5).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in December
Diamond Lake, OR
- Average cloud cover in December: 57
The month with the most cloud cover is March (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 14).
Average visibility in December
Diamond Lake, OR
- Average visibility in December: 4mi
The months with the highest visibility are July, August and September (6mi).
The months with the lowest visibility are January, February, March, April, November and December (4mi).
Diamond Lake, Oregon, USA
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