December weather forecast and climate
Castle, OK

Weather in December

December, the first month of the winter, in Castle, is also a frosty month, with average temperature ranging between max 49.3°F (9.6°C) and min 34.9°F (1.6°C).

Temperature

In December, the average high-temperature drops, from a mild 59.9°F (15.5°C) in November, to a frosty 49.3°F (9.6°C). In December, in Castle, the average low-temperature is 34.9°F (1.6°C).

Humidity

The average relative humidity in Castle is 69%.

Rainfall

In December, in Castle, the rain falls for 6.8 days. Throughout December, 1.42" (36mm) of precipitation is accumulated. In Castle, Oklahoma, during the entire year, the rain falls for 129.9 days and collects up to 29.06" (738mm) of precipitation.

Snowfall

January through April, September, November and December are months with snowfall in Castle. In Castle, during December, snow falls for 1.5 days and regularly aggregates up to 0.47" (12mm) of snow. Throughout the year, in Castle, there are 7.4 snowfall days, and 3.9" (99mm) of snow is accumulated.

Daylight

With an average of 9.8h of daylight, December has the shortest days of the year.

Sunshine

The month with the least sunshine in Castle is December, with an average of 5.7h of sunshine.

UV index

The month with the lowest UV index is December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health hazard from unprotected exposure to the Sun's UV rays for average individuals.
Note: In December, the average maximum UV index of 2 translate into the following recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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.
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FAQ

What is the average humidity in December in Castle?

In Castle, Oklahoma, the average relative humidity in December is 69%.

How much does it rain in Castle in December?

In December, in Castle, the rain falls for 6.8 days. Throughout December, 1.42" (36mm) of precipitation is accumulated.

How much does it snow in Castle in December?

In December, it is snowing for 1.5 days. Throughout December, 0.47" (12mm) of snow is accumulated.

What is the month with the shortest days in Castle?

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

How many hours of daylight does Castle have in December?

In Castle, the average length of the day in December is 9.8h.

What is the month with the least sunshine in Castle?

With an average of 5.7h of sunshine, December has the least sunshine of the year in Castle, Oklahoma.

How long on average sun shines in December in Castle?

In December, the average sunshine is 5.7h.

What is the month with the lowest UV index in Castle?

December is the month with the lowest UV index in Castle, Oklahoma, with an average maximum UV index of 2.

What is the UV index reading in December in Castle?

The average daily maximum UV index in December in Castle is 2. A UV Index value of 2, and less, symbolizes a low health threat from unsafe exposure to the Sun's UV rays.

Average temperature in December
Castle, OK

Average temperature in December - Castle, OK
  • Average high temperature in December: 49.3°F

The warmest months (with the highest average high temperature) are July and August (91.8°F).
The month with the lowest average high temperature is January (47.8°F).

  • Average low temperature in December: 34.9°F

The month with the highest average low temperature is July (72.3°F).
The coldest month (with the lowest average low temperature) is January (32°F).

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Average pressure in December
Castle, OK

Average pressure in December - Castle, OK
  • Average pressure in December: 30.13"

The month with the highest atmospheric pressure is January (30.16").
The month with the lowest atmospheric pressure is June (29.89").

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Average wind speed in December
Castle, OK

Average wind speed in December - Castle, OK
  • Average wind speed in December: 9.5mph

The windiest months (with the highest average wind speed) are March and April (11mph).
The calmest months (with the lowest average wind speed) are July and August (7.4mph).

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Average humidity in December
Castle, OK

Average humidity in December - Castle, OK
  • Average humidity in December: 69%

The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is August (65%).

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Average rainfall in December
Castle, OK

Average rainfall in December - Castle, OK
  • Average rainfall in December: 1.42"

The wettest month (with the highest rainfall) is May (4.72").
The driest months (with the least rainfall) are February and November (1.38").

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Average rainfall days in December
Castle, OK

Average rainfall days in December - Castle, OK
  • Average rainfall days in December: 6.8 days

The month with the highest number of rainy days is May (15.9 days).
The month with the least rainy days is January (6.3 days).

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Average snowfall in December
Castle, OK

Average snowfall in December - Castle, OK
  • Average snowfall in December: 0.47"

The month with the highest snowfall is February (1.81").
Months with the least snowfall are May, June, July, August and October (0").

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Average snowfall days in December
Castle, OK

Average snowfall days in December - Castle, OK
  • Average snowfall days in December: 1.5 days

The month with the highest number of snowfall days is February (2.9 days).
Months with the least snowfall days are May, June, July, August and October (0 days).

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Average daylight in December /
Average sunshine in December
Castle, OK

Average daylight in December / Average sunshine in December - Castle, OK
  • 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: 5.7h

The month with the most sunshine is August (Average sunshine: 11h).
The month with the least sunshine is December (Average sunshine: 5.7h).

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Average sunshine days in December
Castle, OK

Average sunshine days in December - Castle, OK
  • Average sunshine days in December: 21.4 days

The month with the most sunshine days is January (22.4 days).
The month with the least sunshine days is May (13.2 days).

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Average UV index in December
Castle, OK

Average UV index in December - Castle, OK
  • Average UV index in December: 2

Months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 2).

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Average cloud cover in December
Castle, OK

Average cloud cover in December - Castle, OK
  • Average cloud cover in December: 35

The month with the most cloud cover is March (Cloud cover 40).
The month with the least cloud cover is August (Cloud cover 20).

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Average visibility in December
Castle, OK

Average visibility in December - Castle, OK
  • Average visibility in December: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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