December weather forecast and climate
Walnut Creek, NC

The first month of the winter, December, is also a fresh month in Walnut Creek, North Carolina, with average temperature varying between 54.5°F (12.5°C) and 39.9°F (4.4°C).

Temperature

In Walnut Creek, the average high-temperature in December marginally drops, from a mild 60.6°F (15.9°C) in November, to a fresh 54.5°F (12.5°C). In December, in Walnut Creek, the average low-temperature is 39.9°F (4.4°C).

Humidity

In Walnut Creek, the average relative humidity is 77%.

Rainfall

In Walnut Creek, it is raining for 6.6 days, with typically 0.63" (16mm) of accumulated precipitation. In Walnut Creek, during the entire year, the rain falls for 110.7 days and collects up to 9.02" (229mm) of precipitation.

Snowfall

In Walnut Creek snow does not fall in March through December.

Daylight

The month with the shortest days is December, with an average of 9.8h of daylight.

Sunshine

The month with the least sunshine in Walnut Creek is December, with an average of 5.5h of sunshine.

UV index

In December, the average daily maximum UV index in Walnut Creek, North Carolina, is 3. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to the Sun's UV rays for the average person.
Note: In December, the average maximum UV index of 3 translate into the following recommendations:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the temperature in December in Walnut Creek?

In Walnut Creek, North Carolina, in December, the average high-temperature is 54.5°F (12.5°C), and the average low-temperature is 39.9°F (4.4°C).

What is the average humidity in December in Walnut Creek?

In Walnut Creek, North Carolina, the average relative humidity in December is 77%.

How many days does it rain in December in Walnut Creek?

In Walnut Creek, North Carolina, in December, during 6.6 rainfall days, 0.63" (16mm) of precipitation is typically accumulated.

Does it snow in Walnut Creek in December?

In Walnut Creek, North Carolina, in December, it doesn't snow. In January, it regularly snows.

When it does not snow in Walnut Creek?

March through December are months without snowfall.

What is the month with the shortest days in Walnut Creek?

December has the shortest days of the year in Walnut Creek, with an average of 9.8h of daylight.

What is the average length of the day in December in Walnut Creek?

The average length of the day in December is 9.8h.

What is the month with the least sunshine in Walnut Creek?

The month with the least sunshine in Walnut Creek, North Carolina, is December, with an average of 5.5h of sunshine.

How many hours of sunshine does Walnut Creek have in December?

In December, the average sunshine in Walnut Creek, North Carolina, is 5.5h.

What is the UV index reading in December in Walnut Creek?

The average daily maximum UV index in December in Walnut Creek, North Carolina, is 3. A UV Index value of 3 to 5 symbolizes a medium hazard to health from the exposure to the Sun's UV radiation.
Average temperature in December - Walnut Creek, NC
  • Average high temperature in December: 12.5°C

The warmest month (with the highest average high temperature) is July (31.3°C).
The month with the lowest average high temperature is January (9.8°C).

  • Average low temperature in December: 4.4°C

The month with the highest average low temperature is July (22°C).
The coldest month (with the lowest average low temperature) is January (1.4°C).

Average pressure in December - Walnut Creek, NC
  • Average pressure in December: 1020.3mbar

The month with the highest atmospheric pressure is November (1020.5mbar).
The month with the lowest atmospheric pressure is June (1014.6mbar).

Average wind speed in December - Walnut Creek, NC
  • Average wind speed in December: 11.6km/h

The windiest month (with the highest average wind speed) is April (13.9km/h).
The calmest month (with the lowest average wind speed) is August (9km/h).

Average humidity in December - Walnut Creek, NC
  • Average humidity in December: 77%

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: 16mm

The wettest month (with the highest rainfall) is August (36mm).
The driest month (with the least rainfall) is January (10mm).

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: 0mm

The month with the highest snowfall is February (2mm).
Months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0mm).

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).
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: 9.8h

The month with the longest days is June (Average daylight: 14.5h).
The month with the shortest days is December (Average daylight: 9.8h).

  • Average sunshine in December: 5.5h

The month with the most sunshine is July (Average sunshine: 10.8h).
The month with the least sunshine is December (Average sunshine: 5.5h).

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

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

Months with the most cloud cover are February and March (Cloud cover 41).
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: 9km

Months with the highest visibility are January, February, March, April, May, June, July, September, October, November and December (9km).
The month with the lowest visibility is August (8km).