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
With its high average temperature of 42.8°F (6°C) and a low of 32.9°F (0.5°C), December is regarded as the coldest month.Humidity
The months with the highest humidity are January and December, with an average relative humidity of 87%.Rainfall
December is the month with the most rainfall. Rain falls for 18.4 days and accumulates 4.92" (125mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. In Graham, in December, during 1.4 snowfall days, 0.31" (8mm) of snow is typically accumulated. Throughout the year, there are 10.3 snowfall days, and 5.94" (151mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 8h and 36min of daylight.On the first day of December, sunrise is at 7:35 am and sunset at 4:21 pm. On the last day of the month, sunrise is at 7:55 am and sunset at 4:30 pm PST.
Sunshine
With an average of 4.1h of sunshine, December has the least sunshine of the year in Graham.UV index
The months with the lowest UV index are January, February, October through December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for average individuals.Note: A maximum daily UV index of 2 during December morphs into the following directions:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. 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
What part of the year is the coldest?
How cold does it get in December?
What are the most humid months?
What is the average humidity in December?
What is the rainiest month?
How many days does it rain in December?
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?
When are sunrise and sunset in December?
What is the month with the least sunshine?
How many hours of sunshine does Graham have in December?
What are the months with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Graham, WA
- Average high temperature in December: 42.8°F
The warmest month (with the highest average high temperature) is August (77.2°F).
The month with the lowest average high temperature is December (42.8°F).
- Average low temperature in December: 32.9°F
The month with the highest average low temperature is August (51.3°F).
The coldest month (with the lowest average low temperature) is December (32.9°F).
Average pressure in December
Graham, WA
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are March, August and September (30.01"Hg).
Average wind speed in December
Graham, WA
- Average wind speed in December: 4.5mph
The windiest months (with the highest average wind speed) are January and March (4.9mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).
Average humidity in December
Graham, WA
- Average humidity in December: 87%
The months with the highest relative humidity are January and December (87%).
The month with the lowest relative humidity is July (70%).
Average rainfall in December
Graham, WA
- Average rainfall in December: 4.92"
The wettest month (with the highest rainfall) is December (4.92").
The driest month (with the least rainfall) is July (0.43").
Average rainfall days in December
Graham, WA
- Average rainfall days in December: 18.4 days
The month with the highest number of rainy days is March (20.2 days).
The month with the least rainy days is August (4.8 days).
Average snowfall in December
Graham, WA
- Average snowfall in December: 0.31"
The month with the highest snowfall is February (2.44").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Graham, WA
- Average snowfall days in December: 1.4 days
The month with the highest number of snowfall days is February (4.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Graham, WA
- Average daylight in December: 8h and 4min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in December: 4h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 4h and 6min).
Average sunshine days in December
Graham, WA
- Average sunshine days in December: 11.1 days
The month with the most sunshine days is August (23.8 days).
The month with the least sunshine days is November (9.3 days).
Average UV index in December
Graham, WA
- Average UV index in December: 2
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, October, November and December (UV index 2).
Average cloud cover in December
Graham, WA
- Average cloud cover in December: 58
The month with the most cloud cover is December (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in December
Graham, WA
- Average visibility in December: 5mi
The months with the highest visibility are July and August (6mi).
The months with the lowest visibility are January and February (4mi).
Graham, Washington, USA
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