Duncan
Oklahoma, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Duncan, OK

December, the first month of the winter, in Duncan, is still a cool month, with average temperature varying between 55°F (12.8°C) and 32°F (0°C).

Temperature

In December, the average high-temperature decreases, from a comfortable 64°F (17.8°C) in November, to a fresh 55°F (12.8°C). The average low-temperature, in Duncan, is 32°F (0°C).

Humidity

In Duncan, Oklahoma, the average relative humidity is 66%.

Rainfall

In Duncan, during December, the rain falls for 3.8 days and regularly aggregates up to 1.5" (38.1mm) of precipitation. Throughout the year, there are 60.1 rainfall days, and 33.1" (840.9mm) of precipitation is accumulated.

Snowfall

January through April and December are months with snowfall in Duncan. December is the first month it typically snows. Throughout December, Duncan receives 1.5" (38.1mm) of snow. In Duncan, during the entire year, snow aggregates up to 7" (177.8mm).

Daylight

The month with the shortest days is December, with an average of 9.9h of daylight.

What is the temperature in December in Duncan?

The average high-temperature, in December, is 55°F (12.8°C), while the average low-temperature is 32°F (0°C).

What is the average humidity in December in Duncan?

The average relative humidity in December in Duncan, Oklahoma, is 66%.

How much does it rain in Duncan in December?

In Duncan, Oklahoma, in December, during 3.8 rainfall days, 1.5" (38.1mm) of precipitation is typically accumulated.

When does it start snowing in Duncan?

December is the first month it typically snows. Throughout December, Duncan receives 1.5" (38.1mm) of snow.

What is the month with the shortest days in Duncan?

With an average of 9.9h of daylight, December has the shortest days of the year in Duncan, Oklahoma.

What is the average length of the day in December in Duncan?

In December, the average length of the day is 9.9h.
Average temperature in December - Duncan, OK
  • Average high temperature in December: 55°F

The warmest month (with the highest average high temperature) is August (96°F).
The month with the lowest average high temperature is January (52°F).

  • Average low temperature in December: 32°F

Months with the highest average low temperature are July and August (71°F).
The coldest month (with the lowest average low temperature) is January (29°F).

Average humidity in December - Duncan, OK
  • Average humidity in December: 66%

The month with the highest relative humidity is January (70%).
Months with the lowest relative humidity are August and September (58%).

Average rainfall in December - Duncan, OK
  • Average rainfall in December: 1.5"

The wettest month (with the highest rainfall) is May (6.4").
The driest month (with the lowest rainfall) is January (1.4").

Average rainfall days in December - Duncan, OK
  • Average rainfall days in December: 3.8 days

The month with the highest number of rainy days is May (7.6 days).
The month with the lowest number of rainy days is November (2.9 days).

Average snowfall in December - Duncan, OK
  • Average snowfall in December: 1.5"

The month with the highest snowfall is February (2.2").
Months with the lowest snowfall are May, June, July, August, September, October and November (0").

Average daylight in December - Duncan, OK
  • Average daylight in December: 9.9h

The month with the longest days is June (Average daylight: 14.4h).
The month with shortest days is December (Average daylight: 9.9h).