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
The start of December involves a subtle temperature drop, shifting from a refreshing 60.6°F (15.9°C) in November to a fresh 54.5°F (12.5°C). December's nights in Walnut Creek observe an average temperature of 39.9°F (4.4°C).Humidity
In Walnut Creek, the average relative humidity in December is 77%.Rainfall
In December, in Walnut Creek, the rain falls for 6.6 days. Throughout December, 0.63" (16mm) of precipitation is accumulated. Throughout the year, in Walnut Creek, there are 110.7 rainfall days, and 9.02" (229mm) of precipitation is accumulated.Snowfall
March through December are months without snowfall in Walnut Creek.Daylight
With an average of 9h and 48min of daylight, December has the shortest days of the year in Walnut Creek.On the first day of the month, sunrise is at 7:02 am and sunset at 4:59 pm. On the last day of December, sunrise is at 7:20 am and sunset at 5:09 pm EST.
Sunshine
December has the least sunshine of the year, with an average of 5.5h of sunshine.UV index
In December, the average daily maximum UV index is 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: A daily high UV index of 3 in December leads to these guidelines:
Guard yourself - Precautionary measures against sun damage are advocated. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Stay sun-safe with clothing that is both closely woven and worn loosely. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Frequently asked questions
What are December temperatures in Walnut Creek?
What is the average humidity in December in Walnut Creek?
How many days does it rain in December in Walnut Creek?
When it does not snow in Walnut Creek?
Does it snow in Walnut Creek in December?
What is the month with the shortest days in Walnut Creek?
What is the average length of the day in December in Walnut Creek?
When is the sunrise / sunset in December in Walnut Creek?
What is the month with the least sunshine in Walnut Creek?
How long on average sun shines in December in Walnut Creek?
What is the UV index reading in December in Walnut Creek?
Average temperature in December
Walnut Creek, NC
- Average high temperature in December: 54.5°F
The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is January (49.6°F).
- Average low temperature in December: 39.9°F
The month with the highest average low temperature is July (71.6°F).
The coldest month (with the lowest average low temperature) is January (34.5°F).
Average pressure in December
Walnut Creek, NC
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in December
Walnut Creek, NC
- Average wind speed in December: 7.2mph
The windiest month (with the highest average wind speed) is April (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).
Average humidity in December
Walnut Creek, NC
- Average humidity in December: 77%
The months with the highest relative humidity are August and September (79%).
The month with the lowest relative humidity is January (73%).
Average rainfall in December
Walnut Creek, NC
- Average rainfall in December: 0.63"
The wettest month (with the highest rainfall) is August (1.42").
The driest month (with the least rainfall) is January (0.39").
Average rainfall days in December
Walnut Creek, NC
- Average rainfall days in December: 6.6 days
The month with the highest number of rainy days is August (15 days).
The month with the least rainy days is November (5.8 days).
Average snowfall in December
Walnut Creek, NC
- Average snowfall in December: 0"
The month with the highest snowfall is February (0.08").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in December
Walnut Creek, NC
- Average snowfall days in December: 0.2 days
The month with the highest number of snowfall days is February (0.7 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Walnut Creek, NC
- Average daylight in December: 9h and 5min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in December: 5h and 3min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days in December
Walnut Creek, NC
- Average sunshine days in December: 22.6 days
The month with the most sunshine days is October (23.5 days).
The month with the least sunshine days is June (11.3 days).
Average UV index in December
Walnut Creek, NC
- Average UV index in December: 3
The months with the highest UV index are June and July (UV index 7).
The month with the lowest UV index is January (UV index 2).
Average cloud cover in December
Walnut Creek, NC
- Average cloud cover in December: 40
The months with the most cloud cover are February and March (Cloud cover 41).
The months with the least cloud cover are June, July and October (Cloud cover 32).
Average visibility in December
Walnut Creek, NC
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, September, October, November and December (6mi).
The month with the lowest visibility is August (5mi).
Walnut Creek, North Carolina, USA
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